feat:#34 refactored function to intended service, fixed docker files

services/data-manager/service/addCalDavRoutes.go

@@ -0,0 +1,78 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package service
+
+import (
+	"github.com/labstack/echo/v5"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/apis"
+	"github.com/pocketbase/pocketbase/core"
+	"htwkalender/service/db"
+	"htwkalender/service/ical"
+	"io"
+	"log/slog"
+	"net/http"
+)
+
+func addFeedRoutes(app *pocketbase.PocketBase) {
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodPost,
+			Path:   "/api/feed",
+			Handler: func(c echo.Context) error {
+				requestBody, _ := io.ReadAll(c.Request().Body)
+				result, err := ical.CreateIndividualFeed(requestBody, app)
+				if err != nil {
+					slog.Error("Failed to create individual feed", "error", err)
+					return c.JSON(http.StatusInternalServerError, "Failed to create individual feed")
+				}
+				return c.JSON(http.StatusOK, result)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodDelete,
+			Path:   "/api/feed",
+			Handler: func(c echo.Context) error {
+				token := c.QueryParam("token")
+				err := db.DeleteFeed(app.Dao(), token)
+				if err != nil {
+					return c.JSON(http.StatusNotFound, err)
+				} else {
+					return c.JSON(http.StatusOK, "Feed deleted")
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+}

services/data-manager/service/addRoute.go

@@ -0,0 +1,430 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package service
+
+import (
+	"htwkalender/service/course"
+	"htwkalender/service/events"
+	"htwkalender/service/fetch/sport"
+	v1 "htwkalender/service/fetch/v1"
+	v2 "htwkalender/service/fetch/v2"
+	"htwkalender/service/functions/time"
+	"htwkalender/service/room"
+	"log/slog"
+	"net/http"
+
+	"github.com/labstack/echo/v5"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/apis"
+	"github.com/pocketbase/pocketbase/core"
+)
+
+func AddRoutes(app *pocketbase.PocketBase) {
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/fetch/events",
+			Handler: func(c echo.Context) error {
+				savedEvents, err := v2.ParseEventsFromRemote(app)
+				if err != nil {
+					slog.Error("Failed to parse events from remote: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to parse events from remote")
+				} else {
+					return c.JSON(http.StatusOK, savedEvents)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/fetch/daily/events",
+			Handler: func(c echo.Context) error {
+				course.UpdateCourse(app)
+				return c.JSON(http.StatusOK, "Daily events fetched")
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/fetch/groups",
+			Handler: func(c echo.Context) error {
+				groups, err := v1.FetchSeminarGroups(app)
+				if err != nil {
+					return c.JSON(http.StatusBadRequest, "Failed to fetch seminar groups")
+				}
+				return c.JSON(http.StatusOK, groups)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/fetch/sports",
+			Handler: func(c echo.Context) error {
+
+				sportEvents, err := sport.FetchAndUpdateSportEvents(app)
+				if err != nil {
+					return c.JSON(http.StatusBadRequest, "Failed to fetch sport events")
+				}
+				return c.JSON(http.StatusOK, sportEvents)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodDelete,
+			Path:   "/api/modules",
+			Handler: func(c echo.Context) error {
+				err := events.DeleteAllEvents(app)
+				if err != nil {
+					return c.JSON(http.StatusBadRequest, "Failed to delete events")
+				}
+				return c.JSON(http.StatusOK, "Events deleted")
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/rooms",
+			Handler: func(c echo.Context) error {
+				rooms, err := room.GetRooms(app)
+				if err != nil {
+					return c.JSON(http.StatusBadRequest, "Failed to get rooms")
+				}
+				return c.JSON(http.StatusOK, rooms)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	// API Endpoint to get all events for a specific room on a specific day
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/schedule/day",
+			Handler: func(c echo.Context) error {
+				roomParam := c.QueryParam("room")
+				date := c.QueryParam("date")
+				roomSchedule, err := room.GetRoomScheduleForDay(app, roomParam, date)
+				if err != nil {
+					slog.Error("Failed to get room schedule for day: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get room schedule for day")
+				}
+				return c.JSON(http.StatusOK, roomSchedule)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	// API Endpoint to create a new iCal feed
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/schedule",
+			Handler: func(c echo.Context) error {
+				roomParam := c.QueryParam("room")
+				to := c.QueryParam("to")
+				from := c.QueryParam("from")
+				roomSchedule, err := room.GetRoomSchedule(app, roomParam, from, to)
+				if err != nil {
+					slog.Error("Failed to get room schedule:", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get room schedule")
+				}
+				return c.JSON(http.StatusOK, roomSchedule)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	// API Endpoint to get all rooms that have no events in a specific time frame
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/rooms/free",
+			Handler: func(c echo.Context) error {
+				from, err := time.ParseTime(c.QueryParam("from"))
+				if err != nil {
+					slog.Error("Failed to parse time: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to parse time")
+				}
+				to, err := time.ParseTime(c.QueryParam("to"))
+				if err != nil {
+					slog.Error("Failed to parse time: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to parse time")
+				}
+				rooms, err := room.GetFreeRooms(app, from, to)
+				if err != nil {
+					slog.Error("Failed to get free rooms: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get free rooms")
+				}
+				return c.JSON(http.StatusOK, rooms)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	addFeedRoutes(app)
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/course/modules",
+			Handler: func(c echo.Context) error {
+				modules, err := events.GetModulesForCourseDistinct(
+					app,
+					c.QueryParam("course"),
+					c.QueryParam("semester"),
+				)
+
+				if err != nil {
+					slog.Error("Failed to get modules for course and semester: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get modules for course and semester")
+				} else {
+					return c.JSON(http.StatusOK, modules)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/modules",
+			Handler: func(c echo.Context) error {
+				modules, err := events.GetAllModulesDistinct(app)
+				if err != nil {
+					slog.Error("Failed to get modules: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get modules")
+				}
+				return c.JSON(http.StatusOK, modules)
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/module",
+			Handler: func(c echo.Context) error {
+				requestModule := c.QueryParam("uuid")
+				module, err := events.GetModuleByUUID(app, requestModule)
+				if err != nil {
+					slog.Error("Failed to get module: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get module")
+				} else {
+					return c.JSON(http.StatusOK, module)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/courses",
+			Handler: func(c echo.Context) error {
+				semester := c.QueryParam("semester")
+				if semester == "" {
+					courses := events.GetAllCourses(app)
+					return c.JSON(200, courses)
+				} else {
+					courses := events.GetAllCoursesForSemester(app, semester)
+					return c.JSON(200, courses)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	// api end point to get all courses for a specific semester with courses that have events
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/courses/events",
+			Handler: func(c echo.Context) error {
+				semester := c.QueryParam("semester")
+				courses, err := events.GetAllCoursesForSemesterWithEvents(app, semester)
+
+				if err != nil {
+					slog.Error("Failed to get courses for semester with events: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get courses for semester with events")
+				} else {
+					return c.JSON(http.StatusOK, courses)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	// API Endpoint to get all eventTypes from the database distinct
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodGet,
+			Path:   "/api/events/types",
+			Handler: func(c echo.Context) error {
+				eventTypes, err := events.GetEventTypes(app)
+				if err != nil {
+					slog.Error("Failed to get event types", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to get event types")
+				} else {
+					return c.JSON(http.StatusOK, eventTypes)
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		_, err := e.Router.AddRoute(echo.Route{
+			Method: http.MethodDelete,
+			Path:   "/api/events",
+			Handler: func(c echo.Context) error {
+				err := events.DeleteAllEventsByCourseAndSemester(
+					app,
+					c.QueryParam("course"),
+					c.QueryParam("semester"),
+				)
+				if err != nil {
+					slog.Error("Failed to delete events: ", "error", err)
+					return c.JSON(http.StatusBadRequest, "Failed to delete events")
+				} else {
+					return c.JSON(http.StatusOK, "Events deleted")
+				}
+			},
+			Middlewares: []echo.MiddlewareFunc{
+				apis.ActivityLogger(app),
+				apis.RequireAdminAuth(),
+			},
+		})
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+}

services/data-manager/service/addSchedule.go

@@ -0,0 +1,86 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package service
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/core"
+	"github.com/pocketbase/pocketbase/tools/cron"
+	"htwkalender/service/course"
+	"htwkalender/service/feed"
+	"htwkalender/service/fetch/sport"
+	v1 "htwkalender/service/fetch/v1"
+	v2 "htwkalender/service/fetch/v2"
+	"htwkalender/service/functions/time"
+	"log/slog"
+	"strconv"
+)
+
+func AddSchedules(app *pocketbase.PocketBase) {
+
+	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
+		scheduler := cron.New()
+
+		// !! IMPORTANT !! CRON is based on UTC time zone so in Germany it is UTC+2 in summer and UTC+1 in winter
+
+		// Every sunday at 10pm update all courses (5 segments - minute, hour, day, month, weekday) "0 22 * * 0"
+		scheduler.MustAdd("updateCourses", "0 22 * * 0", func() {
+			slog.Info("Started updating courses schedule")
+			groups, err := v1.FetchSeminarGroups(app)
+			if err != nil {
+				slog.Warn("Failed to fetch seminar groups: ", "error", err)
+			}
+			slog.Info("Successfully fetched " + strconv.FormatInt(int64(len(groups)), 10) + " seminar groups")
+		})
+
+		// Every day at 5am and 5pm update all courses (5 segments - minute, hour, day, month, weekday) "0 5,17 * * *"
+		// In Germany it is 7am and 7pm, syllabus gets updated twice a day at German 5:00 Uhr and 17:00 Uhr
+		scheduler.MustAdd("updateEventsByCourse", "0 5,17 * * *", func() {
+			slog.Info("Started updating courses schedule")
+			course.UpdateCourse(app)
+		})
+
+		// Every sunday at 1am clean all courses (5 segments - minute, hour, day, month, weekday) "0 3 * * 0"
+		scheduler.MustAdd("cleanFeeds", "0 1 * * 0", func() {
+			// clean feeds older than 6 months
+			slog.Info("Started cleaning feeds schedule")
+			feed.ClearFeeds(app.Dao(), 6, time.RealClock{})
+		})
+
+		// Every sunday at 3am fetch all sport events (5 segments - minute, hour, day, month, weekday) "0 2 * * 0"
+		scheduler.MustAdd("fetchSportEvents", "0 3 * * 0", func() {
+			slog.Info("Started fetching sport events schedule")
+			sportEvents, err := sport.FetchAndUpdateSportEvents(app)
+			if err != nil {
+				slog.Error("Failed to fetch and save sport events:", "error", err)
+			}
+			slog.Info("Successfully fetched " + strconv.FormatInt(int64(len(sportEvents)), 10) + " sport events")
+		})
+
+		//fetch all events for semester and delete  from remote this should be done every sunday at 2am
+		scheduler.MustAdd("fetchEvents", "0 22 * * 6", func() {
+			savedEvents, err := v2.FetchAllEventsAndSave(app, time.RealClock{})
+			if err != nil {
+				slog.Error("Failed to fetch and save events: ", "error", err)
+			} else {
+				slog.Info("Successfully fetched " + strconv.FormatInt(int64(len(savedEvents)), 10) + " events")
+			}
+		})
+		scheduler.Start()
+		return nil
+	})
+}

services/data-manager/service/course/courseFunctions.go

@@ -0,0 +1,33 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package course
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"htwkalender/service/events"
+	"log/slog"
+)
+
+func UpdateCourse(app *pocketbase.PocketBase) {
+	courses := events.GetAllCourses(app)
+	for _, course := range courses {
+		_, err := events.UpdateModulesForCourse(app, course)
+		if err != nil {
+			slog.Warn("Update Course: "+course+" failed:", "error", err)
+		}
+	}
+}

services/data-manager/service/date/dateFormat.go

@@ -0,0 +1,86 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package date
+
+import (
+	"log/slog"
+	"strconv"
+	"strings"
+	"time"
+	_ "time/tzdata"
+)
+
+func GetDateFromWeekNumber(year int, weekNumber int, dayName string) (time.Time, error) {
+	// Create a time.Date for the first day of the year
+	europeTime, err := time.LoadLocation("Europe/Berlin")
+
+	if err != nil {
+		slog.Error("Failed to load location: ", "error", err)
+		return time.Time{}, err
+	}
+
+	firstDayOfYear := time.Date(year, time.January, 1, 0, 0, 0, 0, europeTime)
+
+	// Calculate the number of days to add to reach the desired week
+	daysToAdd := time.Duration((weekNumber-1)*7) * 24 * time.Hour
+
+	// Find the starting day of the week (e.g., Monday)
+	startingDayOfWeek := firstDayOfYear
+
+	// check if the first day of the year is friday or saturday or sunday
+
+	if startingDayOfWeek.Weekday() == time.Friday || startingDayOfWeek.Weekday() == time.Saturday || startingDayOfWeek.Weekday() == time.Sunday {
+		for startingDayOfWeek.Weekday() != time.Monday {
+			startingDayOfWeek = startingDayOfWeek.Add(24 * time.Hour)
+		}
+	} else {
+		for startingDayOfWeek.Weekday() != time.Monday {
+			startingDayOfWeek = startingDayOfWeek.Add(-24 * time.Hour)
+		}
+	}
+
+	// Calculate the desired date by adding daysToAdd and adjusting for the day name
+	desiredDate := startingDayOfWeek.Add(daysToAdd)
+
+	// Find the day of the week
+	dayOfWeek := map[string]time.Weekday{
+		"Montag":     time.Monday,
+		"Dienstag":   time.Tuesday,
+		"Mittwoch":   time.Wednesday,
+		"Donnerstag": time.Thursday,
+		"Freitag":    time.Friday,
+		"Samstag":    time.Saturday,
+		"Sonntag":    time.Sunday,
+	}[dayName]
+
+	// Adjust to the desired day of the week
+	for desiredDate.Weekday() != dayOfWeek {
+		desiredDate = desiredDate.Add(24 * time.Hour)
+	}
+
+	return desiredDate, nil
+}
+
+// createEventFromTableData should create an event from the table data
+// tableTime represents Hour and Minute like HH:MM
+// tableDate returns a Time
+func CreateTimeFromHourAndMinuteString(tableTime string) time.Time {
+	timeParts := strings.Split(tableTime, ":")
+	hour, _ := strconv.Atoi(timeParts[0])
+	minute, _ := strconv.Atoi(timeParts[1])
+	return time.Date(0, 0, 0, hour, minute, 0, 0, time.UTC)
+}

services/data-manager/service/date/dateFormat_test.go

@@ -0,0 +1,83 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package date
+
+import (
+	"reflect"
+	"testing"
+	"time"
+	_ "time/tzdata"
+)
+
+func Test_getDateFromWeekNumber(t *testing.T) {
+	europeTime, _ := time.LoadLocation("Europe/Berlin")
+
+	type args struct {
+		year       int
+		weekNumber int
+		dayName    string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    time.Time
+		wantErr bool
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				year:       2021,
+				weekNumber: 1,
+				dayName:    "Montag",
+			},
+			want:    time.Date(2021, 1, 4, 0, 0, 0, 0, europeTime),
+			wantErr: false,
+		},
+		{
+			name: "Test 2",
+			args: args{
+				year:       2023,
+				weekNumber: 57,
+				dayName:    "Montag",
+			},
+			want:    time.Date(2024, 1, 29, 0, 0, 0, 0, europeTime),
+			wantErr: false,
+		},
+		{
+			name: "Test 3",
+			args: args{
+				year:       2023,
+				weekNumber: 1,
+				dayName:    "Montag",
+			},
+			want:    time.Date(2023, 1, 2, 0, 0, 0, 0, europeTime),
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := GetDateFromWeekNumber(tt.args.year, tt.args.weekNumber, tt.args.dayName)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("getDateFromWeekNumber() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("getDateFromWeekNumber() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/db/dbEvents.go

@@ -0,0 +1,400 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"fmt"
+	"github.com/pocketbase/pocketbase/tools/types"
+	"htwkalender/model"
+	"log/slog"
+	"time"
+
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase"
+)
+
+func SaveSeminarGroupEvents(seminarGroup model.SeminarGroup, app *pocketbase.PocketBase) ([]model.Event, error) {
+	var toBeSavedEvents model.Events
+	var savedRecords model.Events
+
+	// check if event is already in database and add to toBeSavedEvents if not
+	for _, event := range seminarGroup.Events {
+		event = event.SetCourse(seminarGroup.Course)
+		existsInDatabase, err := findEventByDayWeekStartEndNameCourse(event, seminarGroup.Course, app)
+		alreadyAddedToSave := toBeSavedEvents.Contains(event)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if !existsInDatabase && !alreadyAddedToSave {
+			toBeSavedEvents = append(toBeSavedEvents, event)
+		}
+	}
+
+	// create record for each event that's not already in the database
+	for _, event := range toBeSavedEvents {
+		event.MarkAsNew()
+		// auto mapping for event fields to record fields
+		err := app.Dao().Save(&event)
+		if err != nil {
+			return nil, err
+		} else {
+			savedRecords = append(savedRecords, event)
+		}
+	}
+
+	return savedRecords, nil
+}
+
+func SaveEvents(events []model.Event, app *pocketbase.PocketBase) ([]model.Event, error) {
+	var toBeSavedEvents model.Events
+	var savedRecords model.Events
+
+	// check if event is already in database and add to toBeSavedEvents if not
+	for _, event := range events {
+		existsInDatabase, err := findEventByDayWeekStartEndNameCourse(event, event.Course, app)
+		alreadyAddedToSave := toBeSavedEvents.Contains(event)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if !existsInDatabase && !alreadyAddedToSave {
+			toBeSavedEvents = append(toBeSavedEvents, event)
+		}
+	}
+
+	// create record for each event that's not already in the database
+	for _, event := range toBeSavedEvents {
+		event.MarkAsNew()
+		// auto mapping for event fields to record fields
+		err := app.Dao().Save(&event)
+		if err != nil {
+			return nil, err
+		} else {
+			savedRecords = append(savedRecords, event)
+		}
+	}
+	return savedRecords, nil
+}
+
+// check if event is already in database and return true if it is and false if it's not
+func findEventByDayWeekStartEndNameCourse(event model.Event, course string, app *pocketbase.PocketBase) (bool, error) {
+
+	var dbEvent model.Event
+
+	err := app.Dao().DB().Select("*").From("events").
+		Where(dbx.NewExp(
+			"Day = {:day} AND "+
+				"Week = {:week} AND "+
+				"Start = {:start} AND "+
+				"End = {:end} AND "+
+				"Name = {:name} AND "+
+				"course = {:course} AND "+
+				"Prof = {:prof} AND "+
+				"Rooms = {:rooms} AND "+
+				"EventType = {:eventType}",
+			dbx.Params{
+				"day":       event.Day,
+				"week":      event.Week,
+				"start":     event.Start,
+				"end":       event.End,
+				"name":      event.Name,
+				"course":    course,
+				"prof":      event.Prof,
+				"rooms":     event.Rooms,
+				"eventType": event.EventType}),
+		).One(&dbEvent)
+
+	if err != nil {
+		if err.Error() == "sql: no rows in result set" {
+			return false, nil
+		}
+		return false, err
+	} else {
+		return true, nil
+	}
+}
+
+func buildIcalQueryForModules(modules []model.FeedCollection) dbx.Expression {
+
+	// build where conditions for each module
+
+	//first check if modules is empty
+	if len(modules) == 0 {
+		return dbx.HashExp{}
+	}
+
+	//second check if modules has only one element
+	if len(modules) == 1 {
+		return dbx.HashExp{"uuid": modules[0].UUID}
+	}
+
+	//third check if modules has more than one element
+	var wheres []dbx.Expression
+
+	for _, module := range modules {
+		where := dbx.HashExp{"uuid": module.UUID}
+		wheres = append(wheres, where)
+	}
+
+	// Use dbx.And or dbx.Or to combine the where conditions as needed
+	where := dbx.Or(wheres...)
+
+	return where
+
+}
+
+// GetPlanForModules returns all events for the given modules with the given course
+// used for the ical feed
+func GetPlanForModules(app *pocketbase.PocketBase, modules map[string]model.FeedCollection) (model.Events, error) {
+
+	var events model.Events
+
+	modulesArray := make([]model.FeedCollection, 0, len(modules))
+	for _, value := range modules {
+		modulesArray = append(modulesArray, value)
+	}
+
+	// iterate over modules in 100 batch sizes
+	for i := 0; i < len(modules); i += 100 {
+		var moduleBatch []model.FeedCollection
+
+		if i+100 > len(modules) {
+			moduleBatch = modulesArray[i:]
+		} else {
+			moduleBatch = modulesArray[i : i+100]
+		}
+
+		var selectedModulesQuery = buildIcalQueryForModules(moduleBatch)
+		// get all events from event records in the events collection
+		err := app.Dao().DB().Select("*").From("events").Where(selectedModulesQuery).OrderBy("start").All(&events)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return events, nil
+}
+
+func GetAllEventsForCourse(app *pocketbase.PocketBase, course string) (model.Events, error) {
+	var events model.Events
+
+	// get all events from event records in the events collection
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("course = {:course}", dbx.Params{"course": course})).All(&events)
+	if err != nil {
+		slog.Error("Error while getting events from database: ", "error", err)
+		return nil, fmt.Errorf("error while getting events from database for course %s", course)
+	}
+
+	return events, nil
+}
+
+func GetAllModulesForCourse(app *pocketbase.PocketBase, course string, semester string) (model.Events, error) {
+	var events model.Events
+
+	// get all events from event records in the events collection
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("course = {:course} AND semester = {:semester}", dbx.Params{"course": course, "semester": semester})).GroupBy("Name").Distinct(true).All(&events)
+	if err != nil {
+		slog.Error("Error while getting events from database: ", "error", err)
+		return nil, fmt.Errorf("error while getting events from database for course %s and semester %s", course, semester)
+	}
+
+	return events, nil
+}
+
+func GetAllModulesDistinctByNameAndCourse(app *pocketbase.PocketBase) ([]model.ModuleDTO, error) {
+	var modules []model.ModuleDTO
+
+	err := app.Dao().DB().Select("Name", "EventType", "Prof", "course", "semester", "uuid").From("events").GroupBy("Name", "Course").Distinct(true).All(&modules)
+	if err != nil {
+		slog.Error("Error while getting events from database: ", "error", err)
+		return nil, fmt.Errorf("error while getting events distinct by name and course from data")
+	}
+
+	return modules, nil
+}
+
+func DeleteAllEventsByCourse(app *pocketbase.PocketBase, course string, semester string) error {
+	_, err := app.Dao().DB().Delete("events", dbx.NewExp("course = {:course} AND semester = {:semester}", dbx.Params{"course": course, "semester": semester})).Execute()
+
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func DeleteAllEventsBySemesterWithoutCourse(app *pocketbase.PocketBase, course string, semester string) error {
+	_, err := app.Dao().DB().Delete("events", dbx.NewExp("course != {:course} AND semester = {:semester}", dbx.Params{"course": course, "semester": semester})).Execute()
+
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func DeleteAllEvents(app *pocketbase.PocketBase) error {
+
+	_, err := app.Dao().DB().Delete("events", dbx.NewExp("1=1")).Execute()
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func FindModuleByUUID(app *pocketbase.PocketBase, uuid string) (model.Module, error) {
+	var module model.Module
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("uuid = {:uuid}", dbx.Params{"uuid": uuid})).One(&module)
+	if err != nil {
+		return model.Module{}, err
+	}
+
+	return module, nil
+}
+
+func FindAllEventsByModule(app *pocketbase.PocketBase, module model.Module) (model.Events, error) {
+	var events model.Events
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Name = {:moduleName} AND course = {:course}", dbx.Params{"moduleName": module.Name, "course": module.Course})).All(&events)
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func GetAllModulesByNameAndDateRange(app *pocketbase.PocketBase, name string, startDate time.Time, endDate time.Time) (model.Events, error) {
+	var events model.Events
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Name = {:name} AND Start >= {:startDate} AND End <= {:endDate}", dbx.Params{"name": name, "startDate": startDate, "endDate": endDate})).All(&events)
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+// GetEventsThatCollideWithTimeRange returns all events that collide with the given time range
+// we have events with start and end in the database, we want to get all events that collide with the given time range
+// we have 4 cases:
+// 1. event starts before the given time range and ends after the given time range
+// 2. event starts after the given time range and ends before the given time range
+// 3. event starts before the given time range and ends before the given time range
+// 4. event starts after the given time range and ends after the given time range
+func GetEventsThatCollideWithTimeRange(app *pocketbase.PocketBase, from time.Time, to time.Time) (model.Events, error) {
+	var fromTypeTime, _ = types.ParseDateTime(from)
+	var toTypeTime, _ = types.ParseDateTime(to)
+
+	events1, err := GetEventsThatStartBeforeAndEndAfter(app, fromTypeTime, toTypeTime)
+	if err != nil {
+		return nil, err
+	}
+	events2, err := GetEventsThatStartAfterAndEndBefore(app, fromTypeTime, toTypeTime)
+	if err != nil {
+		return nil, err
+	}
+
+	events3, err := GetEventsThatStartBeforeAndEndBefore(app, fromTypeTime, toTypeTime)
+	if err != nil {
+		return nil, err
+	}
+
+	events4, err := GetEventsThatStartAfterAndEndAfter(app, fromTypeTime, toTypeTime)
+	if err != nil {
+		return nil, err
+	}
+
+	var events model.Events
+	events = append(events, events1...)
+	events = append(events, events2...)
+	events = append(events, events3...)
+	events = append(events, events4...)
+
+	return events, nil
+}
+
+func GetEventsThatStartBeforeAndEndAfter(app *pocketbase.PocketBase, from types.DateTime, to types.DateTime) (model.Events, error) {
+	var events model.Events
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Start <= {:startDate} AND End >= {:endDate} AND Start <= {:endDate} AND End >= {:startDate}", dbx.Params{"startDate": from, "endDate": to})).Distinct(true).All(&events)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func GetEventsThatStartAfterAndEndBefore(app *pocketbase.PocketBase, from types.DateTime, to types.DateTime) (model.Events, error) {
+	var events model.Events
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Start >= {:startDate} AND End <= {:endDate} AND Start <= {:endDate} AND End >= {:startDate}", dbx.Params{"startDate": from, "endDate": to})).All(&events)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func GetEventsThatStartBeforeAndEndBefore(app *pocketbase.PocketBase, from types.DateTime, to types.DateTime) (model.Events, error) {
+	var events model.Events
+
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Start <= {:startDate} AND End <= {:endDate} AND Start <= {:endDate} AND End >= {:startDate}", dbx.Params{"startDate": from, "endDate": to})).All(&events)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func GetAllEventTypes(app *pocketbase.PocketBase) ([]model.EventType, error) {
+	var eventTypes []model.EventType
+
+	err := app.Dao().DB().Select("EventType").From("events").GroupBy("EventType").Distinct(true).All(&eventTypes)
+	if err != nil {
+		return nil, err
+	}
+
+	return eventTypes, nil
+}
+
+func GetEventsThatStartAfterAndEndAfter(app *pocketbase.PocketBase, from types.DateTime, to types.DateTime) (model.Events, error) {
+	var events model.Events
+	err := app.Dao().DB().Select("*").From("events").Where(dbx.NewExp("Start >= {:startDate} AND End >= {:endDate} AND Start <= {:endDate} AND End >= {:startDate}", dbx.Params{"startDate": from, "endDate": to})).All(&events)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func DeleteEvents(list model.Events, app *pocketbase.PocketBase) error {
+	for _, event := range list {
+		err := app.Dao().Delete(&event)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

services/data-manager/service/db/dbEvents_test.go

@@ -0,0 +1,58 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"github.com/pocketbase/dbx"
+	"htwkalender/model"
+	"reflect"
+	"testing"
+)
+
+func Test_buildIcalQueryForModules(t *testing.T) {
+	type args struct {
+		modules []model.FeedCollection
+	}
+	tests := []struct {
+		name string
+		args args
+		want dbx.Expression
+	}{
+		{
+			name: "empty modules",
+			args: args{modules: []model.FeedCollection{}},
+			want: dbx.HashExp{},
+		},
+		{
+			name: "one module",
+			args: args{modules: []model.FeedCollection{{Name: "test", Course: "test", UUID: "test"}}},
+			want: dbx.HashExp{"uuid": "test"},
+		},
+		{
+			name: "two modules",
+			args: args{modules: []model.FeedCollection{{Name: "test", Course: "test", UUID: "test"}, {Name: "test2", Course: "test2", UUID: "test2"}}},
+			want: dbx.Or(dbx.HashExp{"uuid": "test"}, dbx.HashExp{"uuid": "test2"}),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := buildIcalQueryForModules(tt.args.modules); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("buildIcalQueryForModules() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/db/dbFeeds.go

@@ -0,0 +1,86 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"errors"
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/daos"
+	"github.com/pocketbase/pocketbase/models"
+	"htwkalender/model"
+	"time"
+)
+
+func SaveFeed(feed model.Feed, collection *models.Collection, app *pocketbase.PocketBase) (*models.Record, error) {
+	record := models.NewRecord(collection)
+	record.Set("modules", feed.Modules)
+	err := app.Dao().SaveRecord(record)
+
+	if err != nil {
+		return nil, err
+	}
+	return record, nil
+}
+
+func FindFeedByToken(token string, app *pocketbase.PocketBase) (*model.Feed, error) {
+
+	record, err := app.Dao().FindRecordById("feeds", token)
+
+	if err != nil {
+		return nil, err
+	}
+
+	var feed model.Feed
+	feed.Modules = record.GetString("modules")
+	feed.Retrieved = record.GetDateTime("retrieved")
+
+	//update retrieved time
+	record.Set("retrieved", time.Now())
+
+	err = app.Dao().SaveRecord(record)
+
+	return &feed, err
+}
+
+func DeleteFeed(db *daos.Dao, feedId string) error {
+
+	sqlResult, err := db.DB().Delete("feeds", dbx.NewExp("id = {:id}", dbx.Params{"id": feedId})).Execute()
+	var deletedRows int64
+	if sqlResult != nil {
+		deletedRows, _ = sqlResult.RowsAffected()
+	}
+
+	if err != nil {
+		return err
+	} else {
+		if deletedRows == 0 {
+			return errors.New("No feed with id " + feedId + " found")
+		} else {
+			return nil
+		}
+	}
+}
+
+func GetAllFeeds(db *daos.Dao) ([]model.Feed, error) {
+	var feeds []model.Feed
+	err := db.DB().Select("*").From("feeds").All(&feeds)
+	if err != nil {
+		return nil, err
+	}
+	return feeds, nil
+}

services/data-manager/service/db/dbFeeds_test.go

@@ -0,0 +1,71 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"github.com/pocketbase/pocketbase/daos"
+	"github.com/pocketbase/pocketbase/tests"
+	"testing"
+)
+
+const testDataDir = "./mockData"
+
+func TestDeleteFeed(t *testing.T) {
+
+	setupTestApp := func(t *testing.T) *daos.Dao {
+		testApp, err := tests.NewTestApp(testDataDir)
+		if err != nil {
+			t.Fatal(err)
+		}
+		dao := daos.New(testApp.Dao().DB())
+		return dao
+	}
+
+	type args struct {
+		db     *daos.Dao
+		feedId string
+	}
+	testsCases := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "TestDeleteFeed",
+			args: args{
+				db:     setupTestApp(t),
+				feedId: "fkoqti06ohlnsb8",
+			},
+			wantErr: false,
+		},
+		{
+			name: "TestDeleteFeedNotExisting",
+			args: args{
+				db:     setupTestApp(t),
+				feedId: "test324",
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range testsCases {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := DeleteFeed(tt.args.db, tt.args.feedId); (err != nil) != tt.wantErr {
+				t.Errorf("DeleteFeed() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}

services/data-manager/service/db/dbFunctions.go

@@ -0,0 +1,27 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/models"
+)
+
+func FindCollection(app *pocketbase.PocketBase, collectionName string) (*models.Collection, error) {
+	collection, dbError := app.Dao().FindCollectionByNameOrId(collectionName)
+	return collection, dbError
+}

services/data-manager/service/db/dbGroups.go

@@ -0,0 +1,144 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/models"
+	"htwkalender/model"
+	"log/slog"
+)
+
+func SaveGroups(seminarGroup []model.SeminarGroup, collection *models.Collection, app *pocketbase.PocketBase) ([]*models.Record, error) {
+	var savedRecords []*models.Record
+	var tobeSavedGroups []model.SeminarGroup
+	var insertRecords []*models.Record
+
+	for _, group := range seminarGroup {
+		dbGroup, err := FindGroupByCourseAndSemester(group.Course, group.Semester, app)
+
+		if dbGroup == nil && err.Error() == "sql: no rows in result set" {
+			tobeSavedGroups = append(tobeSavedGroups, group)
+		} else if err != nil {
+			return nil, err
+		}
+	}
+
+	// create record for each group that's not already in the database
+	for _, group := range tobeSavedGroups {
+		record := models.NewRecord(collection)
+		record.Set("university", group.University)
+		record.Set("shortcut", group.GroupShortcut)
+		record.Set("groupId", group.GroupId)
+		record.Set("course", group.Course)
+		record.Set("faculty", group.Faculty)
+		record.Set("facultyId", group.FacultyId)
+		record.Set("semester", group.Semester)
+		insertRecords = append(insertRecords, record)
+	}
+
+	// save all records
+	for _, record := range insertRecords {
+		if record != nil {
+			err := app.Dao().SaveRecord(record)
+			if err == nil {
+				savedRecords = append(savedRecords, record)
+			} else {
+				return nil, err
+			}
+		}
+	}
+
+	return savedRecords, nil
+}
+
+func FindGroupByCourseAndSemester(course string, semester string, app *pocketbase.PocketBase) (*model.SeminarGroup, error) {
+	var group model.SeminarGroup
+	err := app.Dao().DB().Select("*").From("groups").Where(dbx.NewExp("course = {:course} AND semester = {:semester}", dbx.Params{"course": course, "semester": semester})).One(&group)
+	if err != nil {
+		return nil, err
+	}
+	return &group, nil
+}
+
+func GetAllCourses(app *pocketbase.PocketBase) []string {
+
+	var courses []struct {
+		CourseShortcut string `db:"course" json:"course"`
+	}
+
+	// get all rooms from event records in the events collection
+	err := app.Dao().DB().Select("course").From("groups").All(&courses)
+	if err != nil {
+		slog.Error("Error while getting groups from database: ", "error", err)
+		return []string{}
+	}
+
+	var courseArray []string
+
+	for _, course := range courses {
+		courseArray = append(courseArray, course.CourseShortcut)
+	}
+
+	return courseArray
+}
+
+func GetAllCoursesForSemester(app *pocketbase.PocketBase, semester string) []string {
+
+	var courses []struct {
+		CourseShortcut string `db:"course" json:"course"`
+	}
+
+	// get all courses for a specific semester
+	err := app.Dao().DB().Select("course").From("groups").Where(dbx.NewExp("semester = {:semester}", dbx.Params{"semester": semester})).All(&courses)
+	if err != nil {
+		slog.Error("Error while getting groups from database: ", "error", err)
+		return []string{}
+	}
+
+	var courseArray []string
+
+	for _, course := range courses {
+		courseArray = append(courseArray, course.CourseShortcut)
+	}
+
+	return courseArray
+
+}
+
+func GetAllCoursesForSemesterWithEvents(app *pocketbase.PocketBase, semester string) ([]string, error) {
+
+	var courses []struct {
+		CourseShortcut string `db:"course" json:"course"`
+	}
+
+	// get all courses from events distinct for a specific semester
+	err := app.Dao().DB().Select("course").From("events").Where(dbx.NewExp("semester = {:semester}", dbx.Params{"semester": semester})).Distinct(true).All(&courses)
+	if err != nil {
+		slog.Error("Error while getting groups from database: ", "error", err)
+		return nil, err
+	}
+
+	var courseArray []string
+
+	for _, course := range courses {
+		courseArray = append(courseArray, course.CourseShortcut)
+	}
+
+	return courseArray, nil
+}

services/data-manager/service/db/dbRooms.go

@@ -0,0 +1,120 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	"htwkalender/model"
+	"htwkalender/service/functions"
+	"strings"
+	"time"
+
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase"
+)
+
+func GetRooms(app *pocketbase.PocketBase) ([]string, error) {
+
+	var events []struct {
+		Rooms  string `db:"Rooms" json:"Rooms"`
+		Course string `db:"course" json:"Course"`
+	}
+
+	// get all rooms from event records in the events collection
+	err := app.Dao().DB().Select("Rooms", "course").From("events").Distinct(true).All(&events)
+	if err != nil {
+		return nil, err
+	}
+
+	roomArray, err := clearAndSeparateRooms([]struct {
+		Rooms  string
+		Course string
+	}(events))
+
+	if err != nil {
+		return nil, err
+	}
+
+	return roomArray, nil
+}
+
+func clearAndSeparateRooms(events []struct {
+	Rooms  string
+	Course string
+}) ([]string, error) {
+	var roomArray []string
+	for _, event := range events {
+
+		var room []string
+
+		// sport rooms don't have to be separated
+		if event.Course != "Sport" {
+			//split rooms by comma, tab, newline, carriage return, semicolon, space and non-breaking space
+			room = functions.SeperateRoomString(event.Rooms)
+		} else {
+			room = append(room, event.Rooms)
+		}
+
+		//split functions room by space and add each room to array if it is not already in there
+		for _, r := range room {
+			var text = strings.TrimSpace(r)
+			if !functions.Contains(roomArray, text) && len(text) >= 1 {
+				roomArray = append(roomArray, text)
+			}
+		}
+	}
+	return roomArray, nil
+}
+
+func GetRoomScheduleForDay(app *pocketbase.PocketBase, room string, date string) ([]model.Event, error) {
+	var events []model.Event
+
+	// get all events from event records in the events collection
+	err := app.Dao().DB().Select("*").From("events").
+		Where(dbx.Like("Rooms", room).Escape("_", "_")).
+		AndWhere(dbx.Like("Start", date)).
+		GroupBy("Week", "Start", "End", "Rooms").
+		All(&events)
+	if err != nil {
+		return nil, err
+	}
+	return events, nil
+}
+
+func GetRoomSchedule(app *pocketbase.PocketBase, room string, from string, to string) ([]model.Event, error) {
+	var events []model.Event
+
+	fromDate, err := time.Parse("2006-01-02", from)
+	if err != nil {
+		return nil, err
+	}
+	toDate, err := time.Parse("2006-01-02", to)
+	if err != nil {
+		return nil, err
+	}
+
+	// get all events from event records in the events collection
+	err = app.Dao().DB().Select("*").From("events").
+		Where(dbx.Like("Rooms", room).Escape("_", "_")).
+		AndWhere(dbx.Between("Start", fromDate, toDate)).
+		GroupBy("Week", "Start", "End", "Rooms").
+		All(&events)
+
+	if err != nil {
+		return nil, err
+	}
+	return events, nil
+}

services/data-manager/service/events/courseService.go

@@ -0,0 +1,54 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package events
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"htwkalender/service/db"
+	"htwkalender/service/functions"
+)
+
+func GetAllCourses(app *pocketbase.PocketBase) []string {
+	return db.GetAllCourses(app)
+}
+
+func GetAllCoursesForSemester(app *pocketbase.PocketBase, semester string) []string {
+	return db.GetAllCoursesForSemester(app, semester)
+}
+
+func GetAllCoursesForSemesterWithEvents(app *pocketbase.PocketBase, semester string) ([]string, error) {
+	courses, err := db.GetAllCoursesForSemesterWithEvents(app, semester)
+	if err != nil {
+		return nil, err
+	} else {
+		// remove empty courses like " " or ""
+		courses = removeEmptyCourses(courses)
+		return courses, nil
+	}
+}
+
+// removeEmptyCourses removes empty courses from the list of courses
+func removeEmptyCourses(courses []string) []string {
+	var filteredCourses []string
+
+	for index, course := range courses {
+		if !functions.OnlyWhitespace(course) || len(course) != 0 {
+			filteredCourses = append(filteredCourses, courses[index])
+		}
+	}
+	return filteredCourses
+}

services/data-manager/service/events/courseService_test.go

@@ -0,0 +1,55 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package events
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_removeEmptyCourses(t *testing.T) {
+	type args struct {
+		courses []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{
+			name: "Test remove empty courses",
+			args: args{
+				courses: []string{"", "test", "test2", ""},
+			},
+			want: []string{"test", "test2"},
+		},
+		{
+			name: "Test remove empty courses",
+			args: args{
+				courses: []string{"", "test", "test2", "", "test3"},
+			},
+			want: []string{"test", "test2", "test3"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := removeEmptyCourses(tt.args.courses); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("removeEmptyCourses() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/events/eventService.go

@@ -0,0 +1,215 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package events
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"htwkalender/model"
+	"htwkalender/service/db"
+	"htwkalender/service/fetch/v1"
+	"htwkalender/service/functions"
+	"log/slog"
+	"strconv"
+)
+
+func GetModulesForCourseDistinct(app *pocketbase.PocketBase, course string, semester string) (model.Events, error) {
+
+	modules, err := db.GetAllModulesForCourse(app, course, semester)
+
+	// Convert the []model.Module to []Named
+	var namedEvents []Named
+	for _, module := range modules {
+		namedEvents = append(namedEvents, &module)
+	}
+
+	replaceEmptyEntry(namedEvents, "Sonderveranstaltungen")
+	return modules, err
+}
+
+type Named interface {
+	GetName() string
+	SetName(name string)
+}
+
+// replaceEmptyEntry replaces an empty entry in a module with a replacement string
+// If the module is not empty, nothing happens
+func replaceEmptyEntry(namedList []Named, replacement string) {
+	for i, namedItem := range namedList {
+		if functions.OnlyWhitespace(namedItem.GetName()) {
+			namedList[i].SetName(replacement)
+		}
+	}
+}
+
+// GetAllModulesDistinct returns all modules distinct by name and course from the database
+// That means you get all modules with duplicates if they have different courses
+func GetAllModulesDistinct(app *pocketbase.PocketBase) ([]model.ModuleDTO, error) {
+	modules, err := db.GetAllModulesDistinctByNameAndCourse(app)
+	if err != nil {
+		return nil, err
+	}
+	var namedModules []Named
+	for _, module := range modules {
+		namedModules = append(namedModules, &module)
+	}
+	replaceEmptyEntry(namedModules, "Sonderveranstaltungen")
+	return modules, nil
+}
+
+func GetModuleByUUID(app *pocketbase.PocketBase, uuid string) (model.Module, error) {
+	module, findModuleErr := db.FindModuleByUUID(app, uuid)
+	if findModuleErr != nil {
+		return model.Module{}, findModuleErr
+	}
+
+	events, findEventsError := db.FindAllEventsByModule(app, module)
+	if findEventsError != nil || len(events) == 0 {
+		return model.Module{}, findEventsError
+	} else {
+		return model.Module{
+			UUID:     events[0].UUID,
+			Name:     events[0].Name,
+			Events:   events,
+			Prof:     events[0].Prof,
+			Course:   events[0].Course,
+			Semester: events[0].Semester,
+		}, nil
+	}
+}
+
+// DeleteAllEventsByCourseAndSemester deletes all events for a course and a semester
+// If the deletion was successful, nil is returned
+// If the deletion was not successful, an error is returned
+func DeleteAllEventsByCourseAndSemester(app *pocketbase.PocketBase, course string, semester string) error {
+	err := db.DeleteAllEventsByCourse(app, course, semester)
+	if err != nil {
+		return err
+	} else {
+		return nil
+	}
+}
+
+func DeleteAllEvents(app *pocketbase.PocketBase) error {
+	err := db.DeleteAllEvents(app)
+	if err != nil {
+		return err
+	} else {
+		return nil
+	}
+}
+
+// UpdateModulesForCourse updates all modules for a course
+// Does Updates for ws and ss semester sequentially
+// Update runs through the following steps:
+// 1. Delete all events for the course and the semester
+// 2. Fetch all events for the course and the semester
+// 3. Save all events for the course and the semester
+// If the update was successful, nil is returned
+// If the update was not successful, an error is returned
+func UpdateModulesForCourse(app *pocketbase.PocketBase, course string) (model.Events, error) {
+
+	seminarGroup := v1.GetSeminarGroupEventsFromHTML(course)
+
+	seminarGroup = v1.ClearEmptySeminarGroups(seminarGroup)
+
+	seminarGroup = v1.ReplaceEmptyEventNames(seminarGroup)
+
+	//check if events in the seminarGroups Events are already in the database
+	//if yes, keep the database as it is
+	//if no, delete all events for the course and the semester and save the new events
+	//if there are no events in the database, save the new events
+
+	//get all events for the course and the semester
+	dbEvents, err := db.GetAllEventsForCourse(app, course)
+	if err != nil {
+		return nil, err
+	}
+
+	//if there are no events in the database, save the new events
+	if len(dbEvents) == 0 {
+		events, dbError := db.SaveSeminarGroupEvents(seminarGroup, app)
+		if dbError != nil {
+			return nil, dbError
+		}
+		return events, nil
+	}
+
+	// Create partial update list and delete list for the events
+	var insertList model.Events
+	var deleteList model.Events
+
+	// check which events are not already in the database and need to be inserted/saved
+	for _, event := range seminarGroup.Events {
+		if !ContainsEvent(dbEvents, event) {
+			insertList = append(insertList, event)
+		}
+	}
+
+	// check which events are in the database but not in the seminarGroup and need to be deleted
+	for _, dbEvent := range dbEvents {
+		if !ContainsEvent(seminarGroup.Events, dbEvent) {
+			deleteList = append(deleteList, dbEvent)
+		}
+	}
+
+	// delete all events that are in the deleteList
+	err = db.DeleteEvents(deleteList, app)
+	if err != nil {
+		slog.Error("Failed to delete events:", "error", err)
+		return nil, err
+	}
+
+	// save all events that are in the insertList
+	savedEvents, err := db.SaveEvents(insertList, app)
+	if err != nil {
+		slog.Error("Failed to save events: ", "error", err)
+		return nil, err
+	}
+
+	slog.Info("Course: " + course + " - Event changes: " + strconv.FormatInt(int64(len(insertList)), 10) + " new events, " + strconv.FormatInt(int64(len(deleteList)), 10) + " deleted events")
+	return savedEvents, nil
+}
+
+func ContainsEvent(events model.Events, event model.Event) bool {
+	for _, e := range events {
+		if e.Name == event.Name &&
+			e.Prof == event.Prof &&
+			e.Rooms == event.Rooms &&
+			e.Semester == event.Semester &&
+			e.Start == event.Start &&
+			e.End == event.End &&
+			e.Course == event.Course {
+			return true
+		}
+	}
+	return false
+}
+
+func GetEventTypes(app *pocketbase.PocketBase) ([]string, error) {
+	dbEventTypes, err := db.GetAllEventTypes(app)
+	if err != nil {
+		return nil, err
+	}
+
+	// Convert the []model.EventType to []string
+	var eventTypes []string
+	for _, eventType := range dbEventTypes {
+		eventTypes = append(eventTypes, eventType.EventType)
+	}
+
+	return eventTypes, nil
+}

services/data-manager/service/events/eventService_test.go

@@ -0,0 +1,58 @@
+package events
+
+import (
+	"htwkalender/model"
+	"testing"
+)
+
+func TestContainsEvent(t *testing.T) {
+	type args struct {
+		events model.Events
+		event  model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "contains event",
+			args: args{
+				events: model.Events{
+					{
+						UUID: "934807509832475",
+						Name: "name",
+					},
+				},
+				event: model.Event{
+					UUID: "934807509832475",
+					Name: "name",
+				},
+			},
+			want: true,
+		},
+		{
+			name: "contains no event",
+			args: args{
+				events: model.Events{
+					{
+						UUID: "9991929292921912343534",
+						Name: "Name1",
+					},
+				},
+				event: model.Event{
+					UUID: "1111112312312312",
+					Name: "Name2",
+				},
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := ContainsEvent(tt.args.events, tt.args.event); got != tt.want {
+				t.Errorf("ContainsEvent() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/feed/feedFunctions.go

@@ -0,0 +1,126 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package feed
+
+import (
+	"database/sql"
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase/daos"
+	"htwkalender/model"
+	database "htwkalender/service/db"
+	localTime "htwkalender/service/functions/time"
+	"log/slog"
+	"strings"
+)
+
+func ClearFeeds(db *daos.Dao, months int, clock localTime.Clock) {
+	feeds, err := database.GetAllFeeds(db)
+	if err != nil {
+		slog.Error("CleanFeeds: failed to get all feeds", "error", err)
+		return
+	}
+	for _, feed := range feeds {
+		// if retrieved time is older than a half year delete feed
+		now := clock.Now()
+		feedRetrievedTime := feed.Retrieved.Time()
+		timeShift := now.AddDate(0, -months, 0)
+
+		if feedRetrievedTime.Before(timeShift) {
+			// delete feed
+			var sqlResult sql.Result
+			sqlResult, err = db.DB().Delete("feeds", dbx.NewExp("id = {:id}", dbx.Params{"id": feed.GetId()})).Execute()
+			if err != nil {
+				slog.Error("CleanFeeds: delete feed "+feed.GetId()+" failed", "error", err)
+				slog.Error("SQL Result: ", "error", sqlResult)
+			} else {
+				slog.Info("CleanFeeds: delete feed " + feed.GetId() + " successful")
+			}
+		}
+	}
+}
+
+func CombineEventsInFeed(events model.Events) model.Events {
+	// Combine events with the same name, start, end and course
+	// check if there are events
+	if len(events) > 0 {
+		combinedEvents := model.Events{events[0]}
+
+		for i := 1; i < len(events); i++ {
+			// check if the event is already in the combinedEvents
+			alreadyInCombinedEvents := false
+
+			for j := 0; j < len(combinedEvents); j++ {
+				if events[i].Name == combinedEvents[j].Name &&
+					events[i].Start == combinedEvents[j].Start &&
+					events[i].End == combinedEvents[j].End &&
+					events[i].Course == combinedEvents[j].Course {
+					alreadyInCombinedEvents = true
+					combinedEvents[j].Notes = addNotesIfAlreadyRoomsAdded(events, combinedEvents, j, i)
+					combinedEvents[j].Prof = combineProfs(events, i, combinedEvents, j)
+					combinedEvents[j].Rooms = combineRooms(events, i, combinedEvents, j)
+					break
+				}
+			}
+			if !alreadyInCombinedEvents {
+				combinedEvents = append(combinedEvents, events[i])
+			}
+		}
+		return combinedEvents
+	}
+	return model.Events{}
+}
+
+func addNotesIfAlreadyRoomsAdded(events model.Events, combinedEvents model.Events, index2 int, index1 int) string {
+	// check if combinedEvents[index2].Rooms string contains comma "," &#44
+	if !strings.Contains(combinedEvents[index2].Rooms, ",") {
+		return descriptionString(combinedEvents[index2]) + "\n" + descriptionString(events[index1])
+	} else {
+		return combinedEvents[index2].Notes + "\n" + descriptionString(events[index1])
+	}
+}
+
+func combineProfs(events model.Events, index1 int, combinedEvents model.Events, index2 int) string {
+	// combine the profs
+	if events[index1].Prof != "" {
+		if combinedEvents[index2].Prof == "" {
+			return events[index1].Prof
+		} else {
+			if !strings.Contains(combinedEvents[index2].Prof, events[index1].Prof) {
+				return combinedEvents[index2].Prof + ", " + events[index1].Prof
+			}
+		}
+	}
+	return combinedEvents[index2].Prof
+}
+
+func descriptionString(event model.Event) string {
+	return event.Rooms + " - " + event.Notes + " (" + event.Prof + ")"
+}
+
+func combineRooms(events model.Events, index1 int, combinedEvents model.Events, index2 int) string {
+	// combine the rooms
+	if events[index1].Rooms != "" {
+		if combinedEvents[index2].Rooms == "" {
+			return events[index1].Rooms
+		} else {
+			if !strings.Contains(combinedEvents[index2].Rooms, events[index1].Rooms) {
+				return combinedEvents[index2].Rooms + ", " + events[index1].Rooms
+			}
+		}
+	}
+	return combinedEvents[index2].Rooms
+}

services/data-manager/service/feed/feedFunctions_test.go

@@ -0,0 +1,200 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package feed
+
+import (
+	"github.com/pocketbase/pocketbase/daos"
+	"github.com/pocketbase/pocketbase/tests"
+	"htwkalender/model"
+	mockTime "htwkalender/service/functions/time"
+	"reflect"
+	"testing"
+	"time"
+)
+
+const testDataDir = "./mockData"
+
+func TestClearFeeds(t *testing.T) {
+
+	setupTestApp := func(t *testing.T) *daos.Dao {
+		testApp, err := tests.NewTestApp(testDataDir)
+		if err != nil {
+			t.Fatal(err)
+		}
+		dao := daos.New(testApp.Dao().DB())
+		return dao
+	}
+
+	type args struct {
+		db        *daos.Dao
+		months    int
+		mockClock mockTime.MockClock
+	}
+	testCases := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			name: "TestClearFeeds",
+			args: args{
+				db:     setupTestApp(t),
+				months: 6,
+				mockClock: mockTime.MockClock{
+					NowTime: time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: 1,
+		},
+		{
+			name: "TestClearAllFeeds",
+			args: args{
+				db:     setupTestApp(t),
+				months: 1,
+				mockClock: mockTime.MockClock{
+					NowTime: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: 0,
+		},
+		{
+			name: "TestClearFeedsClearBeforeRetrievedTime",
+			args: args{
+				db:     setupTestApp(t),
+				months: 1,
+				mockClock: mockTime.MockClock{
+					NowTime: time.Date(2010, 1, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: 3,
+		},
+	}
+	for _, tt := range testCases {
+		t.Run(tt.name, func(t *testing.T) {
+			ClearFeeds(tt.args.db, tt.args.months, tt.args.mockClock)
+			// count all feeds in db
+			var feeds []*model.Feed
+			err := tt.args.db.DB().Select("id").From("feeds").All(&feeds)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got := len(feeds); got != tt.want {
+				t.Errorf("ClearFeeds() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestCombineEventsInFeed(t *testing.T) {
+	type args struct {
+		events model.Events
+	}
+	testCases := []struct {
+		name string
+		args args
+		want model.Events
+	}{
+		{
+			name: "TestCombineEventsInFeed",
+			args: args{
+				events: model.Events{
+					{
+						Name:  "Modellierung",
+						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+						Prof:  "Prof. Bunt",
+						Rooms: "LI001",
+						Notes: "Gruppe 2",
+					},
+					{
+						Name:  "Modellierung",
+						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+						Prof:  "Prof. Bunt",
+						Rooms: "LI002",
+						Notes: "Gruppe 1",
+					},
+				},
+			},
+			want: model.Events{
+				{
+					Name:  "Modellierung",
+					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+					Prof:  "Prof. Bunt",
+					Rooms: "LI001, LI002",
+					Notes: "LI001 - Gruppe 2 (Prof. Bunt)\nLI002 - Gruppe 1 (Prof. Bunt)",
+				},
+			},
+		},
+		{
+			name: "CannotCombineEventsInFeed",
+			args: args{
+				events: model.Events{
+					{
+						Name:  "Modellierung",
+						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+						Prof:  "Prof. Bunt",
+						Rooms: "LI001",
+						Notes: "Gruppe 2",
+					},
+					{
+						Name:  "Modellierung - 2",
+						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+						Prof:  "Prof. Bunt",
+						Rooms: "LI002",
+						Notes: "Gruppe 1",
+					},
+				},
+			},
+			want: model.Events{
+				{
+					Name:  "Modellierung",
+					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+					Prof:  "Prof. Bunt",
+					Rooms: "LI001",
+					Notes: "Gruppe 2",
+				},
+				{
+					Name:  "Modellierung - 2",
+					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
+					Prof:  "Prof. Bunt",
+					Rooms: "LI002",
+					Notes: "Gruppe 1",
+				},
+			},
+		},
+		{
+			name: "NoEventsInFeed",
+			args: args{
+				events: model.Events{},
+			},
+			want: model.Events{},
+		},
+	}
+	for _, tt := range testCases {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := CombineEventsInFeed(tt.args.events); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("CombineEventsInFeed() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/fetch/htmlDownloader.go

@@ -0,0 +1,66 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package fetch
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+// getPlanHTML Get the HTML document from the specified URL
+
+func GetHTML(url string) (string, error) {
+
+	// Create HTTP client with timeout of 5 seconds
+	client := http.Client{
+		Timeout: 30 * time.Second,
+	}
+
+	// Send GET request
+	response, err := client.Get(url)
+	if err != nil {
+		fmt.Printf("Error occurred while making the request: %s\n", err.Error())
+		return "", err
+	}
+	defer func(Body io.ReadCloser) {
+		err := Body.Close()
+		if err != nil {
+			return
+		}
+	}(response.Body)
+
+	// Read the response body
+	body, err := io.ReadAll(response.Body)
+
+	if err != nil {
+		fmt.Printf("Error occurred while reading the response: %s\n", err.Error())
+		return "", err
+	}
+
+	return toUtf8(body), err
+
+}
+
+func toUtf8(iso88591Buf []byte) string {
+	buf := make([]rune, len(iso88591Buf))
+	for i, b := range iso88591Buf {
+		buf[i] = rune(b)
+	}
+	return string(buf)
+}

services/data-manager/service/fetch/sport/sportFetcher.go

@@ -0,0 +1,572 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package sport
+
+import (
+	"errors"
+	"github.com/google/uuid"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/tools/types"
+	"htwkalender/model"
+	"htwkalender/service/db"
+	"htwkalender/service/functions"
+	clock "htwkalender/service/functions/time"
+	"io"
+	"log/slog"
+	"net/http"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/PuerkitoBio/goquery"
+)
+
+// FetchAndUpdateSportEvents fetches all sport events from the HTWK sport website
+// it deletes them first and then saves them to the database
+// It returns all saved events
+func FetchAndUpdateSportEvents(app *pocketbase.PocketBase) ([]model.Event, error) {
+
+	sportCourseLinks, err := fetchAllAvailableSportCourses()
+
+	if err != nil {
+		return nil, err
+	}
+
+	sportEntries := fetchHTWKSportCourses(sportCourseLinks)
+	events := formatEntriesToEvents(sportEntries)
+
+	var earliestDate time.Time
+	var latestDate time.Time
+
+	// find earliest and latest date in events
+	for _, event := range events {
+		if event.Start.Time().Before(earliestDate) {
+			earliestDate = event.Start.Time()
+		}
+		if event.End.Time().After(latestDate) {
+			latestDate = event.End.Time()
+		}
+	}
+
+	// get all events from database where name = Feiertage und lehrveranstaltungsfreie Tage
+	holidays, err := db.GetAllModulesByNameAndDateRange(app, "Feiertage und lehrveranstaltungsfreie Tage", earliestDate, latestDate)
+	if err != nil {
+		return nil, err
+	}
+
+	// remove all events that have same year, month and day as items in holidays
+	for _, holiday := range holidays {
+		for i, event := range events {
+			if event.Start.Time().Year() == holiday.Start.Time().Year() &&
+				event.Start.Time().Month() == holiday.Start.Time().Month() &&
+				event.Start.Time().Day() == holiday.Start.Time().Day() {
+				events = append(events[:i], events[i+1:]...)
+			}
+		}
+	}
+
+	// @TODO: delete and save events in one transaction and it only should delete events that are not in the new events list and save events that are not in the database
+	err = db.DeleteAllEventsByCourse(app, "Sport", functions.GetCurrentSemesterString(clock.RealClock{}))
+	if err != nil {
+		return nil, err
+	}
+
+	// save events to database
+	savedEvents, err := db.SaveEvents(events, app)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return savedEvents, nil
+
+}
+
+func formatEntriesToEvents(entries []model.SportEntry) []model.Event {
+
+	var events []model.Event
+
+	for _, entry := range entries {
+		eventStarts, eventEnds := getWeekEvents(entry.Details.DateRange.Start, entry.Details.DateRange.End, entry.Details.Cycle)
+		for j := range eventStarts {
+
+			start, _ := types.ParseDateTime(eventStarts[j].In(time.UTC))
+			end, _ := types.ParseDateTime(eventEnds[j].In(time.UTC))
+
+			var event = model.Event{
+				UUID:      uuid.NewSHA1(uuid.NameSpaceDNS, []byte(entry.Title+entry.ID+entry.Details.Type)).String(),
+				Day:       toGermanWeekdayString(start.Time().Weekday()),
+				Week:      strconv.Itoa(23),
+				Start:     start,
+				End:       end,
+				Name:      entry.Title + " (" + entry.ID + ")",
+				EventType: entry.Details.Type,
+				Prof:      entry.Details.CourseLead.Name,
+				Rooms:     entry.Details.Location.Name,
+				Notes:     entry.AdditionalNote,
+				BookedAt:  "",
+				Course:    "Sport",
+				Semester:  checkSemester(entry.Details.DateRange.Start),
+			}
+			events = append(events, event)
+		}
+	}
+	return events
+}
+
+func getDayInt(weekDay string) (int, error) {
+	var weekDayInt int
+	var err error = nil
+	switch weekDay {
+	case "Mo":
+		weekDayInt = 1
+	case "Di":
+		weekDayInt = 2
+	case "Mi":
+		weekDayInt = 3
+	case "Do":
+		weekDayInt = 4
+	case "Fr":
+		weekDayInt = 5
+	case "Sa":
+		weekDayInt = 6
+	case "So":
+		weekDayInt = 0
+	default:
+		{
+			err = errors.New("no day found")
+			weekDayInt = -1
+		}
+	}
+	return weekDayInt, err
+}
+
+func toGermanWeekdayString(weekday time.Weekday) string {
+	switch weekday {
+	case time.Monday:
+		return "Montag"
+	case time.Tuesday:
+		return "Dienstag"
+	case time.Wednesday:
+		return "Mittwoch"
+	case time.Thursday:
+		return "Donnerstag"
+	case time.Friday:
+		return "Freitag"
+	case time.Saturday:
+		return "Samstag"
+	case time.Sunday:
+		return "Sonntag"
+	default:
+		return ""
+	}
+}
+
+func extractStartAndEndTime(cycle string) (int, int, int, int) {
+	timeRegExp, _ := regexp.Compile("[0-9]{2}:[0-9]{2}")
+	times := timeRegExp.FindAllString(cycle, 2)
+	startHour, _ := strconv.Atoi(times[0][0:2])
+	startMinute, _ := strconv.Atoi(times[0][3:5])
+
+	endHour, _ := strconv.Atoi(times[1][0:2])
+	endMinute, _ := strconv.Atoi(times[1][3:5])
+	return startHour, startMinute, endHour, endMinute
+}
+
+func getWeekEvents(start time.Time, end time.Time, cycle string) ([]time.Time, []time.Time) {
+	var weekEvents []model.SportDayStartEnd
+	// split by regexp to get the cycle parts
+	var cycleParts = splitByCommaWithTime(cycle)
+	for _, cyclePart := range cycleParts {
+
+		//cut string at the first integer/number
+		cyclePartWithDaysOnly := cyclePart[0:strings.IndexFunc(cyclePart, func(r rune) bool { return r >= '0' && r <= '9' })]
+
+		// check if cycle has multiple days by checking if it has a plus sign
+		if strings.Contains(cyclePartWithDaysOnly, "+") {
+			// find all days in cycle part by regexp
+			dayRegExp, _ := regexp.Compile("[A-Z][a-z]")
+			days := dayRegExp.FindAllString(cyclePart, -1)
+			startHour, startMinute, endHour, endMinute := extractStartAndEndTime(cyclePart)
+
+			// creating a SportDayStartEnd for each day in the cycle
+			for _, day := range days {
+				weekDay, err := getDayInt(day)
+				if err != nil {
+					slog.Error("Error while getting day int: "+day+" ", "error", err)
+				} else {
+					weekEvents = append(weekEvents, model.SportDayStartEnd{
+						Start: time.Date(start.Year(), start.Month(), start.Day(), startHour, startMinute, 0, 0, start.Location()),
+						End:   time.Date(end.Year(), end.Month(), end.Day(), endHour, endMinute, 0, 0, end.Location()),
+						Day:   time.Weekday(weekDay),
+					})
+				}
+			}
+
+		}
+
+		// check if cycle has multiple days by checking if it has a minus sign
+		if strings.Contains(cyclePartWithDaysOnly, "-") {
+			// find all days in cycle part by regexp
+			dayRegExp, _ := regexp.Compile("[A-Z][a-z]")
+			days := dayRegExp.FindAllString(cyclePart, 2)
+			startHour, startMinute, endHour, endMinute := extractStartAndEndTime(cyclePart)
+
+			var startI, endI int
+			var endIErr, startIErr error
+			startI, startIErr = getDayInt(days[0])
+			endI, endIErr = getDayInt(days[1])
+
+			if endIErr != nil || startIErr != nil {
+				slog.Error("StartError while getting day int: "+days[0]+" - "+days[1]+" :", "error", startIErr)
+				slog.Error("EndError while getting day int: "+days[0]+" - "+days[1]+" :", "error", endIErr)
+			} else {
+				//create a int array with all days from start to end day
+				var daysBetween []int
+				for i := startI; i <= endI; i++ {
+					daysBetween = append(daysBetween, i)
+				}
+
+				// creating a SportDayStartEnd for each day in the cycle
+				weekEvents = createEventListFromStartToEndMatchingDay23(daysBetween, start, startHour, startMinute, end, endHour, endMinute)
+			}
+		}
+
+		// check if cycle has only one day
+		if !strings.Contains(cyclePartWithDaysOnly, "-") && !strings.Contains(cyclePartWithDaysOnly, "+") {
+			// find all days in cycle part by regexp
+			dayRegExp, _ := regexp.Compile("[A-Z][a-z]")
+			days := dayRegExp.FindAllString(cyclePart, -1)
+			startHour, startMinute, endHour, endMinute := extractStartAndEndTime(cyclePart)
+
+			var dayNumbers []int
+			for _, day := range days {
+
+				dayInt, err := getDayInt(day)
+				if err != nil {
+					slog.Error("Error while getting day int: "+day+" ", "error", err)
+				} else {
+					dayNumbers = append(dayNumbers, dayInt)
+				}
+			}
+
+			// creating a SportDayStartEnd for each day in the cycle
+			weekEvents = append(weekEvents, createEventListFromStartToEndMatchingDay23(dayNumbers, start, startHour, startMinute, end, endHour, endMinute)...)
+			for _, day := range days {
+
+				weekDay, err := getDayInt(day)
+				if err != nil {
+					slog.Error("Error while getting day int: "+day+" ", "error", err)
+				} else {
+					weekEvents = append(weekEvents, model.SportDayStartEnd{
+						Start: time.Date(start.Year(), start.Month(), start.Day(), startHour, startMinute, 0, 0, start.Location()),
+						End:   time.Date(end.Year(), end.Month(), end.Day(), endHour, endMinute, 0, 0, end.Location()),
+						Day:   time.Weekday(weekDay),
+					})
+				}
+			}
+		}
+	}
+
+	var startDatesList []time.Time
+	var endDatesList []time.Time
+
+	for _, weekEvent := range weekEvents {
+		startDates, endDates := createEventListFromStartToEndMatchingDay(weekEvent)
+		startDatesList = append(startDatesList, startDates...)
+		endDatesList = append(endDatesList, endDates...)
+	}
+
+	return startDatesList, endDatesList
+}
+
+// creating a SportDayStartEnd for each day in the cycle
+func createEventListFromStartToEndMatchingDay23(days []int, start time.Time, startHour int, startMinute int, end time.Time, endHour int, endMinute int) []model.SportDayStartEnd {
+
+	var weekEvents []model.SportDayStartEnd
+
+	for _, day := range days {
+		weekEvents = append(weekEvents, model.SportDayStartEnd{
+			Start: time.Date(start.Year(), start.Month(), start.Day(), startHour, startMinute, 0, 0, start.Location()),
+			End:   time.Date(end.Year(), end.Month(), end.Day(), endHour, endMinute, 0, 0, end.Location()),
+			Day:   time.Weekday(day),
+		})
+	}
+	return weekEvents
+}
+
+func createEventListFromStartToEndMatchingDay(weekEvent model.SportDayStartEnd) ([]time.Time, []time.Time) {
+	var startDates []time.Time
+	var endDates []time.Time
+	for d := weekEvent.Start; d.Before(weekEvent.End); d = d.AddDate(0, 0, 1) {
+		if d.Weekday() == weekEvent.Day {
+			startDates = append(startDates, time.Date(d.Year(), d.Month(), d.Day(), weekEvent.Start.Hour(), weekEvent.Start.Minute(), 0, 0, d.Location()))
+			endDates = append(endDates, time.Date(d.Year(), d.Month(), d.Day(), weekEvent.End.Hour(), weekEvent.End.Minute(), 0, 0, d.Location()))
+		}
+	}
+	return startDates, endDates
+}
+
+func splitByCommaWithTime(input string) []string {
+	var result []string
+
+	// Split by comma
+	parts := strings.Split(input, ", ")
+
+	// Regular expression to match a day with time
+	regex := regexp.MustCompile(`([A-Za-z]{2,}(\+[A-Za-z]{2,})* \d{2}:\d{2}-\d{2}:\d{2})`)
+
+	// Iterate over parts and combine when necessary
+	var currentPart string
+	for _, part := range parts {
+		if regex.MatchString(part) {
+			if currentPart != "" {
+				currentPart += ", " + part
+				result = append(result, currentPart)
+				currentPart = ""
+			} else {
+				result = append(result, part)
+			}
+			// If the part contains a day with time, start a new currentPart
+
+		} else {
+			// If there's no currentPart, start a new one
+			if currentPart != "" {
+				currentPart += ", " + part
+			} else {
+				currentPart = part
+			}
+		}
+	}
+
+	// Add the last currentPart to the result
+	if currentPart != "" {
+		result = append(result, currentPart)
+	}
+
+	return result
+}
+
+// check if ws or ss
+func checkSemester(date time.Time) string {
+	if date.Month() >= 4 && date.Month() <= 9 {
+		return "ss"
+	} else {
+		return "ws"
+	}
+}
+
+// fetch the main page where all sport courses are listed and extract all links to the sport courses
+func fetchAllAvailableSportCourses() ([]string, error) {
+	var url = "https://sport.htwk-leipzig.de/sportangebote"
+
+	var doc, err = htmlRequest(url)
+
+	if err != nil {
+		slog.Error("Error while fetching sport courses from webpage", "error", err)
+		return nil, err
+	}
+
+	// link list of all sport courses
+	var links []string
+
+	// find all links to sport courses with regex https://sport.htwk-leipzig.de/sportangebote/detail/sport/ + [0-9]{1,4}
+	doc.Find("a[href]").Each(func(i int, s *goquery.Selection) {
+		link, _ := s.Attr("href")
+		if strings.HasPrefix(link, "/sportangebote/detail/sport/") {
+			links = append(links, link)
+		}
+	})
+
+	return links, nil
+}
+
+// fetchAllHTWKSportCourses fetches all sport courses from the given links.
+// to speed up the process, it uses multithreading.
+
+func fetchHTWKSportCourses(links []string) []model.SportEntry {
+
+	//multithreaded webpage requests to speed up the process
+
+	var maxThreads = 10
+	var htmlPageArray = make([]*goquery.Document, len(links))
+	var hostUrl = "https://sport.htwk-leipzig.de"
+
+	var wg sync.WaitGroup
+	wg.Add(maxThreads)
+	for i := 0; i < maxThreads; i++ {
+		go func(i int) {
+			for j := i; j < len(links); j += maxThreads {
+				doc, err := htmlRequest(hostUrl + links[j])
+				if err == nil {
+					htmlPageArray[j] = doc
+				}
+			}
+			wg.Done()
+		}(i)
+	}
+	wg.Wait()
+
+	var events []model.SportEntry
+
+	for _, doc := range htmlPageArray {
+		if doc != nil {
+			event, err := fetchHtwkSportCourse(doc)
+			if err == nil {
+				events = append(events, event...)
+			}
+		}
+	}
+	return events
+}
+
+func htmlRequest(url string) (*goquery.Document, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer func(Body io.ReadCloser) {
+		readErr := Body.Close()
+		if readErr != nil {
+			slog.Error("Error while closing response body from html request", "error", readErr)
+			return
+		}
+	}(resp.Body)
+
+	doc, err := goquery.NewDocumentFromReader(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return doc, nil
+}
+
+// fetchHtwkSportCourse fetches the sport course from the given url and id.
+// If the sport course does not exist, it will return an error.
+// If the sport course exists, it will return the sport course.
+// goquery is used to parse the html. The html structure is not very consistent, so it is hard to parse.
+// May be improved in the future.
+func fetchHtwkSportCourse(doc *goquery.Document) ([]model.SportEntry, error) {
+	var events []model.SportEntry
+	germanTime, _ := time.LoadLocation("Europe/Berlin")
+
+	if doc.Find("h1").Text() == "Aktuelle Sportangebote" {
+		return nil, errors.New("not a sport course page")
+	}
+
+	doc.Find(".eventHead").Each(func(i int, s *goquery.Selection) {
+		var event model.SportEntry
+		var details model.EventDetails
+
+		fullTitle := strings.TrimSpace(s.Find("h3").Text())
+		titleParts := strings.Split(fullTitle, "-")
+		if len(titleParts) > 0 {
+			event.Title = strings.TrimSpace(titleParts[0])
+		}
+
+		if len(titleParts) > 2 {
+			details.Type = strings.TrimSpace(titleParts[len(titleParts)-1])
+		}
+
+		event.ID = parseEventID(fullTitle)
+
+		s.NextFiltered("table.eventDetails").Find("tr").Each(func(i int, s *goquery.Selection) {
+			key := strings.TrimSpace(s.Find("td").First().Text())
+			value := strings.TrimSpace(s.Find("td").Last().Text())
+
+			switch key {
+			case "Zeitraum":
+				dates := strings.Split(value, "-")
+				if len(dates) == 2 {
+					startDate, _ := time.ParseInLocation("02.01.2006", strings.TrimSpace(dates[0]), germanTime)
+					endDate, _ := time.ParseInLocation("02.01.2006", strings.TrimSpace(dates[1]), germanTime)
+					details.DateRange = model.DateRange{Start: startDate, End: endDate}
+				}
+			case "Zyklus":
+				details.Cycle = value
+			case "Geschlecht":
+				details.Gender = value
+			case "Leiter":
+				leaderName := strings.TrimSpace(s.Find("td a").Text())
+				leadersSlice := strings.Split(leaderName, "\n")
+				for i, leader := range leadersSlice {
+					leadersSlice[i] = strings.TrimSpace(leader)
+				}
+				formattedLeaders := strings.Join(leadersSlice, ", ")
+				leaderLink, _ := s.Find("td a").Attr("href")
+				details.CourseLead = model.CourseLead{Name: formattedLeaders, Link: leaderLink}
+			case "Ort":
+				locationDetails := strings.Split(value, "(")
+				if len(locationDetails) == 2 {
+					details.Location = model.Location{
+						Name:    strings.TrimSpace(locationDetails[0]),
+						Address: strings.TrimRight(strings.TrimSpace(locationDetails[1]), ")"),
+					}
+				}
+			case "Teilnehmer":
+				parts := strings.Split(value, "/")
+				if len(parts) >= 3 {
+					bookings, _ := strconv.Atoi(strings.TrimSpace(parts[0]))
+					totalPlaces, _ := strconv.Atoi(strings.TrimSpace(parts[1]))
+					waitList, _ := strconv.Atoi(strings.TrimSpace(parts[2]))
+					details.Participants = model.Participants{Bookings: bookings, TotalPlaces: totalPlaces, WaitList: waitList}
+				}
+			case "Kosten":
+				details.Cost = value // makes no sense since you need to be logged in to see the price
+			case "Hinweis":
+				var allNotes []string
+
+				s.Find("td").Last().Contents().Each(func(i int, s *goquery.Selection) {
+					if s.Is("h4.eventAdvice") || goquery.NodeName(s) == "#text" {
+						note := strings.TrimSpace(s.Text())
+						if note != "" {
+							allNotes = append(allNotes, note)
+						}
+					}
+				})
+
+				event.AdditionalNote = strings.Join(allNotes, " ")
+			}
+		})
+
+		event.Details = details
+		events = append(events, event)
+	})
+
+	return events, nil
+}
+
+// parseEventID from fulltitle
+// the event id is a number in the fulltitle thats not a time like HH:MM and shoudl be found after Nr. or Nr:
+func parseEventID(fulltitle string) string {
+	var eventID string
+	var numberRegExp = regexp.MustCompile("[0-9]{1,4}")
+	var fulltitleParts = strings.Split(fulltitle, " ")
+	for i, part := range fulltitleParts {
+		if part == "Nr." || part == "Nr:" {
+			eventID = fulltitleParts[i+1]
+			break
+		}
+	}
+	if eventID == "" {
+		eventID = numberRegExp.FindString(fulltitle)
+	}
+	return eventID
+
+}

services/data-manager/service/fetch/sport/sportFetcher_test.go

@@ -0,0 +1,56 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package sport
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_splitByCommaWithTime(t *testing.T) {
+	type args struct {
+		input string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{"one string", args{"one"}, []string{"one"}},
+		{"two strings", args{"one,two"}, []string{"one,two"}},
+		{"three strings", args{"one,two,three"}, []string{"one,two,three"}},
+		// e.g. "Mo 18:00-20:00, Di 18:00-20:00" -> ["Mo 18:00-20:00", "Di 18:00-20:00"]
+		// e.g. "Mo 18:00-20:00, Di 18:00-20:00, Mi 18:00-20:00" -> ["Mo 18:00-20:00", "Di 18:00-20:00", "Mi 18:00-20:00"]
+		// e.g. "Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00" -> ["Mo, Mi, Fr 18:00-20:00", "Sa 20:00-21:00"]
+		// e.g. "Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00" -> ["Mo, Mi, Fr 18:00-20:00", "Sa 20:00-21:00", "So 20:00-21:00"]
+		// e.g. "Mo+Mi+Fr 18:00-20:00, Sa 20:00-21:00" -> ["Mo+Mi+Fr 18:00-20:00", "Sa 20:00-21:00"]
+		// e.g. "Mo+Mi 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00" -> ["Mo+Mi 18:00-20:00", "Sa 20:00-21:00", "So 20:00-21:00"]
+		{"Mo 18:00-20:00, Di 18:00-20:00", args{"Mo 18:00-20:00, Di 18:00-20:00"}, []string{"Mo 18:00-20:00", "Di 18:00-20:00"}},
+		{"Mo 18:00-20:00, Di 18:00-20:00, Mi 18:00-20:00", args{"Mo 18:00-20:00, Di 18:00-20:00, Mi 18:00-20:00"}, []string{"Mo 18:00-20:00", "Di 18:00-20:00", "Mi 18:00-20:00"}},
+		{"Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00", args{"Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00"}, []string{"Mo, Mi, Fr 18:00-20:00", "Sa 20:00-21:00"}},
+		{"Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00", args{"Mo, Mi, Fr 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00"}, []string{"Mo, Mi, Fr 18:00-20:00", "Sa 20:00-21:00", "So 20:00-21:00"}},
+		{"Mo+Mi+Fr 18:00-20:00, Sa 20:00-21:00", args{"Mo+Mi+Fr 18:00-20:00, Sa 20:00-21:00"}, []string{"Mo+Mi+Fr 18:00-20:00", "Sa 20:00-21:00"}},
+		{"Mo+Mi 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00", args{"Mo+Mi 18:00-20:00, Sa 20:00-21:00, So 20:00-21:00"}, []string{"Mo+Mi 18:00-20:00", "Sa 20:00-21:00", "So 20:00-21:00"}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := splitByCommaWithTime(tt.args.input); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("splitByCommaWithTime() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/fetch/v1/fetchSeminarEventService.go

@@ -0,0 +1,297 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v1
+
+import (
+	"fmt"
+	"github.com/google/uuid"
+	"github.com/pocketbase/pocketbase/tools/types"
+	"golang.org/x/net/html"
+	"htwkalender/model"
+	"htwkalender/service/date"
+	"htwkalender/service/fetch"
+	"htwkalender/service/functions"
+	"log/slog"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func ReplaceEmptyEventNames(group model.SeminarGroup) model.SeminarGroup {
+	for j, event := range group.Events {
+		if functions.OnlyWhitespace(event.Name) {
+			group.Events[j].Name = "Sonderveranstaltungen"
+		}
+	}
+	return group
+}
+
+func ClearEmptySeminarGroups(seminarGroup model.SeminarGroup) model.SeminarGroup {
+	var newSeminarGroup = model.SeminarGroup{}
+
+	if len(seminarGroup.Events) > 0 && seminarGroup.Course != "" {
+		newSeminarGroup = seminarGroup
+	}
+	return newSeminarGroup
+}
+
+func GetSeminarGroupEventsFromHTML(seminarGroupLabel string) model.SeminarGroup {
+	var seminarGroup model.SeminarGroup
+
+	if (time.Now().Month() >= 3) && (time.Now().Month() <= 10) {
+		ssUrl := "https://stundenplan.htwk-leipzig.de/" + string("ss") + "/Berichte/Text-Listen;Studenten-Sets;name;" + seminarGroupLabel + "?template=sws_semgrp&weeks=1-65"
+		result, getError := fetch.GetHTML(ssUrl)
+		if getError == nil {
+			seminarGroup = parseSeminarGroup(result)
+		}
+	}
+
+	if (time.Now().Month() >= 9) || (time.Now().Month() <= 4) {
+		wsUrl := "https://stundenplan.htwk-leipzig.de/" + string("ws") + "/Berichte/Text-Listen;Studenten-Sets;name;" + seminarGroupLabel + "?template=sws_semgrp&weeks=1-65"
+		result, getError := fetch.GetHTML(wsUrl)
+		if getError == nil {
+			seminarGroup = parseSeminarGroup(result)
+		}
+	}
+	return seminarGroup
+}
+
+func SplitEventType(events []model.Event) ([]model.Event, error) {
+	re, err := regexp.Compile("^([VPS])([wp])$")
+	if err != nil {
+		return nil, err
+	}
+
+	for i, event := range events {
+		matched := re.Match([]byte(event.EventType))
+		if matched {
+			eventType := event.EventType
+			event.EventType = eventType[0:1]
+			event.Compulsory = eventType[1:2]
+			events[i] = event
+		}
+	}
+	return events, nil
+}
+
+func parseSeminarGroup(result string) model.SeminarGroup {
+	doc, err := html.Parse(strings.NewReader(result))
+	if err != nil {
+		fmt.Printf("Error occurred while parsing the HTML document: %s\n", err.Error())
+		return model.SeminarGroup{}
+	}
+
+	table := findFirstTable(doc)
+	eventTables := getEventTables(doc)
+	allDayLabels := getAllDayLabels(doc)
+
+	if eventTables == nil || allDayLabels == nil {
+		return model.SeminarGroup{}
+	}
+	course := findFirstSpanWithClass(table, "header-2-0-1").FirstChild.Data
+	eventsWithCombinedWeeks := toEvents(eventTables, allDayLabels, course)
+	splitEventsByWeekVal := splitEventsByWeek(eventsWithCombinedWeeks)
+	events := splitEventsBySingleWeek(splitEventsByWeekVal)
+	semesterString := findFirstSpanWithClass(table, "header-0-2-0").FirstChild.Data
+	semester, year := extractSemesterAndYear(semesterString)
+	events = convertWeeksToDates(events, semester, year)
+	events = generateUUIDs(events, course)
+	events, err = SplitEventType(events)
+
+	if err != nil {
+		slog.Error("Error occurred while splitting event types:", "error", err)
+		return model.SeminarGroup{}
+	}
+
+	var seminarGroup = model.SeminarGroup{
+		University: findFirstSpanWithClass(table, "header-1-0-0").FirstChild.Data,
+		Course:     course,
+		Events:     events,
+	}
+	return seminarGroup
+}
+
+func generateUUIDs(events []model.Event, course string) []model.Event {
+	for i, event := range events {
+		// generate a hash value from the event name, course and semester
+		hash := uuid.NewSHA1(uuid.NameSpaceOID, []byte(event.Name+course))
+		events[i].UUID = hash.String()
+	}
+	return events
+}
+
+// convertWeeksToDates converts the week and year to a date
+// The date is calculated based on the week and the year
+// The time is unset and 23:00 is used as default
+// Additionally the semester is added to the event
+
+func convertWeeksToDates(events []model.Event, semester string, year string) []model.Event {
+	var newEvents []model.Event
+	eventYear, _ := strconv.Atoi(year)
+
+	// for each event we need to calculate the start and end date based on the week and the year
+	for _, event := range events {
+		eventWeek, _ := strconv.Atoi(event.Week)
+		eventDay, _ := date.GetDateFromWeekNumber(eventYear, eventWeek, event.Day)
+		start := replaceTimeForDate(eventDay, event.Start.Time())
+		end := replaceTimeForDate(eventDay, event.End.Time())
+
+		//Check if end is before start
+		if end.Before(start) {
+			end = end.AddDate(0, 0, 1)
+		}
+
+		newEvent := event
+		newEvent.Start, _ = types.ParseDateTime(start.In(time.UTC))
+		newEvent.End, _ = types.ParseDateTime(end.In(time.UTC))
+		newEvent.Semester = semester
+		newEvents = append(newEvents, newEvent)
+	}
+	return newEvents
+}
+
+// replaceTimeForDate replaces hour, minute, second, nsec for the selected date
+func replaceTimeForDate(date time.Time, replacementTime time.Time) time.Time {
+	return time.Date(date.Year(), date.Month(), date.Day(), replacementTime.Hour(), replacementTime.Minute(), replacementTime.Second(), replacementTime.Nanosecond(), date.Location())
+}
+
+func extractSemesterAndYear(semesterString string) (string, string) {
+	winterPattern := "Wintersemester"
+	summerPattern := "Sommersemester"
+
+	winterMatch := strings.Contains(semesterString, winterPattern)
+	summerMatch := strings.Contains(semesterString, summerPattern)
+
+	semester := ""
+	semesterShortcut := ""
+
+	if winterMatch {
+		semester = "Wintersemester"
+		semesterShortcut = "ws"
+	} else if summerMatch {
+		semester = "Sommersemester"
+		semesterShortcut = "ss"
+	} else {
+		return "", ""
+	}
+
+	yearPattern := `\d{4}`
+	combinedPattern := semester + `\s` + yearPattern
+	re := regexp.MustCompile(combinedPattern)
+	match := re.FindString(semesterString)
+	year := ""
+
+	if match != "" {
+		reYear := regexp.MustCompile(yearPattern)
+		year = reYear.FindString(match)
+	}
+	return semesterShortcut, year
+}
+
+func toEvents(tables [][]*html.Node, days []string, course string) []model.Event {
+	var events []model.Event
+
+	for table := range tables {
+		for row := range tables[table] {
+
+			tableData := findTableData(tables[table][row])
+			if len(tableData) > 0 {
+				start, _ := types.ParseDateTime(createTimeFromHourAndMinuteString(getTextContent(tableData[1])))
+				end, _ := types.ParseDateTime(createTimeFromHourAndMinuteString(getTextContent(tableData[2])))
+				events = append(events, model.Event{
+					Day:       days[table],
+					Week:      getTextContent(tableData[0]),
+					Start:     start,
+					End:       end,
+					Name:      getTextContent(tableData[3]),
+					EventType: getTextContent(tableData[4]),
+					Prof:      getTextContent(tableData[5]),
+					Rooms:     getTextContent(tableData[6]),
+					Notes:     getTextContent(tableData[7]),
+					BookedAt:  getTextContent(tableData[8]),
+					Course:    course,
+				})
+			}
+		}
+
+	}
+	return events
+}
+
+// createEventFromTableData should create an event from the table data
+// tableTime represents Hour and Minute like HH:MM
+// tableDate returns a Time
+func createTimeFromHourAndMinuteString(tableTime string) time.Time {
+	timeParts := strings.Split(tableTime, ":")
+	hour, _ := strconv.Atoi(timeParts[0])
+	minute, _ := strconv.Atoi(timeParts[1])
+	return time.Date(0, 0, 0, hour, minute, 0, 0, time.UTC)
+}
+
+func splitEventsByWeek(events []model.Event) []model.Event {
+	var newEvents []model.Event
+
+	for _, event := range events {
+		weeks := strings.Split(event.Week, ",")
+		for _, week := range weeks {
+			newEvent := event
+			newEvent.Week = strings.TrimSpace(week)
+			newEvents = append(newEvents, newEvent)
+		}
+	}
+	return newEvents
+}
+
+func splitEventsBySingleWeek(events []model.Event) []model.Event {
+	var newEvents []model.Event
+
+	for _, event := range events {
+		if strings.Contains(event.Week, "-") {
+			weeks := splitWeekRange(event.Week)
+			for _, week := range weeks {
+				newEvent := event
+				newEvent.Week = week
+				newEvents = append(newEvents, newEvent)
+			}
+		} else {
+			newEvents = append(newEvents, event)
+		}
+	}
+	return newEvents
+}
+
+func splitWeekRange(weekRange string) []string {
+	parts := strings.Split(weekRange, "-")
+	if len(parts) != 2 {
+		return nil // Invalid format
+	}
+
+	start, errStart := strconv.Atoi(strings.TrimSpace(parts[0]))
+	end, errEnd := strconv.Atoi(strings.TrimSpace(parts[1]))
+
+	if errStart != nil || errEnd != nil {
+		return nil // Error converting to integers
+	}
+
+	var weeks []string
+	for i := start; i <= end; i++ {
+		weeks = append(weeks, strconv.Itoa(i))
+	}
+
+	return weeks
+}

services/data-manager/service/fetch/v1/fetchSeminarEventService_test.go

@@ -0,0 +1,503 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v1
+
+import (
+	"fmt"
+	"github.com/pocketbase/pocketbase/tools/types"
+	"htwkalender/model"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func Test_extractSemesterAndYear(t *testing.T) {
+	type args struct {
+		semesterString string
+	}
+	tests := []struct {
+		name  string
+		args  args
+		want  string
+		want1 string
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				semesterString: "Wintersemester 2023/24 (Planungszeitraum 01.09.2023 bis 03.03.2024)",
+			},
+			want:  "ws",
+			want1: "2023",
+		},
+		{
+			name: "Test 2",
+			args: args{
+				semesterString: "Sommersemester 2023 (Planungszeitraum 06.03. bis 31.08.2023)",
+			},
+			want:  "ss",
+			want1: "2023",
+		},
+		{
+			name: "Test 3",
+			args: args{
+				semesterString: "Sommersemester 2010 (Planungszeitraum 06.03. bis 31.08.2023)",
+			},
+			want:  "ss",
+			want1: "2010",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := extractSemesterAndYear(tt.args.semesterString)
+			if got != tt.want {
+				t.Errorf("extractSemesterAndYear() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("extractSemesterAndYear() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func Test_replaceEmptyEventNames(t *testing.T) {
+	type args struct {
+		group model.SeminarGroup
+	}
+	tests := []struct {
+		name string
+		args args
+		want model.SeminarGroup
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				group: model.SeminarGroup{
+					Events: []model.Event{
+						{
+							Name: "Test",
+						},
+					},
+				},
+			},
+			want: model.SeminarGroup{
+				Events: []model.Event{
+					{
+						Name: "Test",
+					},
+				},
+			},
+		},
+		{
+			name: "Test 1",
+			args: args{
+				group: model.SeminarGroup{
+					Events: []model.Event{
+						{
+							Name: "",
+						},
+					},
+				},
+			},
+			want: model.SeminarGroup{
+				Events: []model.Event{
+					{
+						Name: "Sonderveranstaltungen",
+					},
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := ReplaceEmptyEventNames(tt.args.group); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("ReplaceEmptyEventNames() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_splitEventType(t *testing.T) {
+	type args struct {
+		events []model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want []model.Event
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "V",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType:  "V",
+					Compulsory: "",
+				},
+			},
+		},
+		{
+			name: "Test 2",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Vw",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType:  "V",
+					Compulsory: "w",
+				},
+			},
+		},
+		{
+			name: "Test 3",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Sperr",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType:  "Sperr",
+					Compulsory: "",
+				},
+			},
+		},
+		{
+			name: "Test 4",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Sperr",
+					},
+					{
+						EventType: "Vw",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType:  "Sperr",
+					Compulsory: "",
+				},
+				{
+					EventType:  "V",
+					Compulsory: "w",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got, _ := SplitEventType(tt.args.events); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("SplitEventType() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_generateUUIDs(t *testing.T) {
+	type args struct {
+		events []model.Event
+		course string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []model.Event
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				events: []model.Event{
+					{
+						Name: " Arbeitssicherheit / Rechtsformen von Unternehmen B435 SBB  (wpf) & B348 BIB (pf) 5. FS",
+					},
+				},
+				course: "21BIB-2a",
+			},
+			want: []model.Event{
+				{
+					Name: " Arbeitssicherheit / Rechtsformen von Unternehmen B435 SBB  (wpf) & B348 BIB (pf) 5. FS",
+					UUID: "3720afdc-10c7-5b72-9489-cffb70cb0c13",
+				},
+			},
+		},
+		{
+			name: "Test 2",
+			args: args{
+				events: []model.Event{
+					{
+						Name: " Arbeitssicherheit / Rechtsformen von Unternehmen B435 SBB  (wpf) & B348 BIB (pf) 5. FS",
+					},
+				},
+				course: "21BIB-2b",
+			},
+			want: []model.Event{
+				{
+					Name: " Arbeitssicherheit / Rechtsformen von Unternehmen B435 SBB  (wpf) & B348 BIB (pf) 5. FS",
+					UUID: "81083480-bcf1-5452-af84-bb27d79282d8",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := generateUUIDs(tt.args.events, tt.args.course); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("generateUUIDs() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_createTimeFromHourAndMinuteString(t *testing.T) {
+	type args struct {
+		tableTime string
+	}
+	tests := []struct {
+		name string
+		args args
+		want time.Time
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				tableTime: "08:00",
+			},
+			want: time.Date(0, 0, 0, 8, 0, 0, 0, time.UTC),
+		},
+		{
+			name: "Test 2",
+			args: args{
+				tableTime: "08:15",
+			},
+			want: time.Date(0, 0, 0, 8, 15, 0, 0, time.UTC),
+		},
+		{
+			name: "Test 3",
+			args: args{
+				tableTime: "08:30",
+			},
+			want: time.Date(0, 0, 0, 8, 30, 0, 0, time.UTC),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := createTimeFromHourAndMinuteString(tt.args.tableTime); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("createTimeFromHourAndMinuteString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_replaceTimeInDate(t *testing.T) {
+	type args struct {
+		date time.Time
+		time time.Time
+	}
+	tests := []struct {
+		name string
+		args args
+		want time.Time
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				date: time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				time: time.Date(0, 0, 0, 8, 0, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 0, 0, 0, time.UTC),
+		},
+		{
+			name: "Test 2",
+			args: args{
+				date: time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				time: time.Date(0, 0, 0, 8, 15, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 15, 0, 0, time.UTC),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := replaceTimeForDate(tt.args.date, tt.args.time); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("addTimeToDate() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_convertWeeksToDates(t *testing.T) {
+	type args struct {
+		events   []model.Event
+		semester string
+		year     string
+	}
+	returnDateTime := func(date time.Time) types.DateTime {
+		dateTime, err := types.ParseDateTime(date)
+		if err != nil {
+			fmt.Println(err)
+		}
+		return dateTime
+	}
+	tests := []struct {
+		name string
+		args args
+		want []model.Event
+	}{
+		{
+			name: "Test Wintertime",
+			args: args{
+				events: []model.Event{
+					{
+						Week:  "1",
+						Day:   "Montag",
+						Start: returnDateTime(time.Date(0, 0, 0, 7, 30, 0, 0, time.UTC)),
+						End:   returnDateTime(time.Date(0, 0, 0, 9, 0, 0, 0, time.UTC)),
+					},
+				},
+				semester: "ws",
+				year:     "2021",
+			},
+			want: []model.Event{
+				{
+					Week:     "1",
+					Day:      "Montag",
+					Start:    returnDateTime(time.Date(2021, 1, 4, 6, 30, 0, 0, time.UTC)),
+					End:      returnDateTime(time.Date(2021, 1, 4, 8, 0, 0, 0, time.UTC)),
+					Semester: "ws",
+				},
+			},
+		},
+		{
+			name: "Test Summertime",
+			args: args{
+				events: []model.Event{
+					{
+						Week:  "30",
+						Day:   "Donnerstag",
+						Start: returnDateTime(time.Date(0, 0, 0, 7, 30, 0, 0, time.UTC)),
+						End:   returnDateTime(time.Date(0, 0, 0, 0, 0, 0, 0, time.UTC)),
+					},
+				},
+				semester: "ws",
+				year:     "2023",
+			},
+			want: []model.Event{
+				{
+					Week:     "30",
+					Day:      "Donnerstag",
+					Start:    returnDateTime(time.Date(2023, 7, 27, 5, 30, 0, 0, time.UTC)),
+					End:      returnDateTime(time.Date(2023, 7, 27, 22, 0, 0, 0, time.UTC)),
+					Semester: "ws",
+				},
+			},
+		},
+		{
+			name: "Test NextDay",
+			args: args{
+				events: []model.Event{
+					{
+						Week:  "45",
+						Day:   "Donnerstag",
+						Start: returnDateTime(time.Date(0, 0, 0, 7, 30, 0, 0, time.UTC)),
+						End:   returnDateTime(time.Date(0, 0, 0, 4, 0, 0, 0, time.UTC)),
+					},
+				},
+				semester: "ws",
+				year:     "2023",
+			},
+			want: []model.Event{
+				{
+					Week:     "45",
+					Day:      "Donnerstag",
+					Start:    returnDateTime(time.Date(2023, 11, 9, 6, 30, 0, 0, time.UTC)),
+					End:      returnDateTime(time.Date(2023, 11, 10, 3, 0, 0, 0, time.UTC)),
+					Semester: "ws",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := convertWeeksToDates(tt.args.events, tt.args.semester, tt.args.year); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("convertWeeksToDates() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_replaceTimeForDate(t *testing.T) {
+	type args struct {
+		date            time.Time
+		replacementTime time.Time
+	}
+	tests := []struct {
+		name string
+		args args
+		want time.Time
+	}{
+		{
+			name: "Replace Hour",
+			args: args{
+				date:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				replacementTime: time.Date(0, 0, 0, 8, 0, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 0, 0, 0, time.UTC),
+		},
+		{
+			name: "Replace Hour and Minute",
+			args: args{
+				date:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				replacementTime: time.Date(0, 0, 0, 8, 15, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 15, 0, 0, time.UTC),
+		},
+		{
+			name: "Replace Hour and Minute",
+			args: args{
+				date:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				replacementTime: time.Date(0, 0, 0, 8, 30, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 30, 0, 0, time.UTC),
+		},
+		{
+			name: "Replace Hour and Minute without Year, Month, Day",
+			args: args{
+				date:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				replacementTime: time.Date(2023, 10, 3, 8, 30, 0, 0, time.UTC),
+			},
+			want: time.Date(2021, 1, 1, 8, 30, 0, 0, time.UTC),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := replaceTimeForDate(tt.args.date, tt.args.replacementTime); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("replaceTimeForDate() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/fetch/v1/fetchSeminarGroupService.go

@@ -0,0 +1,141 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v1
+
+import (
+	"encoding/xml"
+	"fmt"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/models"
+	"htwkalender/model"
+	"htwkalender/service/db"
+	"htwkalender/service/functions"
+	"htwkalender/service/functions/time"
+	"io"
+	"log/slog"
+	"net/http"
+)
+
+func getSeminarHTML(semester string) (string, error) {
+	url := "https://stundenplan.htwk-leipzig.de/stundenplan/xml/public/semgrp_" + semester + ".xml"
+
+	// Send GET request
+	response, err := http.Get(url)
+	if err != nil {
+		fmt.Printf("Error occurred while making the request: %s\n", err.Error())
+		return "", err
+	}
+	defer func(Body io.ReadCloser) {
+		err := Body.Close()
+		if err != nil {
+			return
+		}
+	}(response.Body)
+
+	// Read the response body
+	body, err := io.ReadAll(response.Body)
+
+	if err != nil {
+		fmt.Printf("Error occurred while reading the response: %s\n", err.Error())
+		return "", err
+	}
+
+	return string(body), err
+
+}
+
+func FetchSeminarGroups(app *pocketbase.PocketBase) ([]*models.Record, error) {
+	var groups []model.SeminarGroup
+
+	semesterString := functions.CalculateSemesterList(time.RealClock{})
+	var results [2]string
+	var err error
+
+	for i, semester := range semesterString {
+		results[i], err = getSeminarHTML(semester)
+		if err != nil {
+			slog.Error("Error while fetching seminar groups for: "+semester, "error", err)
+			return nil, err
+		}
+		groups = append(groups, parseSeminarGroups(results[i], semester)...)
+	}
+
+	// filter duplicates
+	groups = removeDuplicates(groups)
+
+	collection, dbError := db.FindCollection(app, "groups")
+	if dbError != nil {
+		slog.Error("Error while searching collection groups", "error", dbError)
+		return nil, err
+	}
+	var insertedGroups []*models.Record
+
+	insertedGroups, dbError = db.SaveGroups(groups, collection, app)
+	if dbError != nil {
+		slog.Error("Error while saving groups", "error", dbError)
+		return nil, err
+	}
+
+	return insertedGroups, nil
+}
+
+func removeDuplicates(groups []model.SeminarGroup) []model.SeminarGroup {
+	var uniqueGroups []model.SeminarGroup
+	for _, group := range groups {
+		if !contains(uniqueGroups, group) {
+			uniqueGroups = append(uniqueGroups, group)
+		}
+	}
+	return uniqueGroups
+}
+
+func contains(groups []model.SeminarGroup, group model.SeminarGroup) bool {
+	for _, a := range groups {
+		if (a.Course == group.Course) && (a.Semester == group.Semester) {
+			return true
+		}
+	}
+	return false
+}
+
+func parseSeminarGroups(result string, semester string) []model.SeminarGroup {
+
+	var studium model.Studium
+	err := xml.Unmarshal([]byte(result), &studium)
+	if err != nil {
+		return nil
+	}
+
+	var seminarGroups []model.SeminarGroup
+	for _, faculty := range studium.Faculty {
+		for _, Studiengang := range faculty.Studiengang {
+			for _, Studienrichtung := range Studiengang.Semgrp {
+				seminarGroup := model.SeminarGroup{
+					University:    "HTWK-Leipzig",
+					GroupShortcut: Studiengang.Name,
+					GroupId:       Studiengang.ID,
+					Course:        Studienrichtung.Name,
+					Faculty:       faculty.Name,
+					FacultyId:     faculty.ID,
+					Semester:      semester,
+				}
+				seminarGroups = append(seminarGroups, seminarGroup)
+			}
+		}
+	}
+	return seminarGroups
+}

services/data-manager/service/fetch/v1/fetchSeminarGroupService_test.go

@@ -0,0 +1,91 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v1
+
+import (
+	"htwkalender/model"
+	"testing"
+)
+
+func Test_contains(t *testing.T) {
+	type args struct {
+		groups []model.SeminarGroup
+		group  model.SeminarGroup
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "should return true if group is in groups",
+			args: args{
+				groups: []model.SeminarGroup{
+					{
+						Course:   "test",
+						Semester: "test",
+					},
+				},
+				group: model.SeminarGroup{
+					Course:   "test",
+					Semester: "test",
+				},
+			},
+			want: true,
+		},
+		{
+			name: "should return false if group is not in groups",
+			args: args{
+				groups: []model.SeminarGroup{
+					{
+						Course:   "test",
+						Semester: "test",
+					},
+				},
+				group: model.SeminarGroup{
+					Course:   "test",
+					Semester: "test2",
+				},
+			},
+			want: false,
+		},
+		{
+			name: "should return false if group is not in courses",
+			args: args{
+				groups: []model.SeminarGroup{
+					{
+						Course:   "test3",
+						Semester: "test",
+					},
+				},
+				group: model.SeminarGroup{
+					Course:   "test",
+					Semester: "test",
+				},
+			},
+			want: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := contains(tt.args.groups, tt.args.group); got != tt.want {
+				t.Errorf("contains() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/fetch/v1/htmlParsingFunctions.go

@@ -0,0 +1,217 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v1
+
+import (
+	"golang.org/x/net/html"
+	"strings"
+)
+
+// Find the first <table> element in the HTML document
+func findFirstTable(node *html.Node) *html.Node {
+	if node.Type == html.ElementNode && node.Data == "table" {
+		return node
+	}
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		found := findFirstTable(child)
+		if found != nil {
+			return found
+		}
+	}
+	return nil
+}
+
+// Find the first <span> element with the specified class attribute value
+func findFirstSpanWithClass(node *html.Node, classValue string) *html.Node {
+
+	// Check if the current node is a <span> element with the specified class attribute value
+	if node.Type == html.ElementNode && node.Data == "span" {
+		if hasClassAttribute(node, classValue) {
+			return node
+		}
+	}
+
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		found := findFirstSpanWithClass(child, classValue)
+		if found != nil {
+			return found
+		}
+	}
+	return nil
+}
+
+// Check if the specified element has the specified class attribute value
+func hasClassAttribute(node *html.Node, classValue string) bool {
+	for _, attr := range node.Attr {
+		if attr.Key == "class" && strings.Contains(attr.Val, classValue) {
+			return true
+		}
+	}
+	return false
+}
+
+// Get Tables with days
+func getEventTables(node *html.Node) [][]*html.Node {
+	var eventTables [][]*html.Node
+	tables := findTables(node)
+	// get all tables with events
+	for events := range tables {
+		rows := findTableRows(tables[events])
+		// check that a first row exists
+		if len(rows) > 0 {
+			rows = rows[1:]
+			eventTables = append(eventTables, rows)
+		}
+	}
+	return eventTables
+}
+
+// Get Tables with days
+func getAllDayLabels(node *html.Node) []string {
+	paragraphs := findParagraphs(node)
+	var dayArray []string
+
+	for _, p := range paragraphs {
+		label := getDayLabel(p)
+		if label != "" {
+			dayArray = append(dayArray, label)
+		}
+	}
+	return dayArray
+}
+
+// Find all <p> elements in the HTML document
+func findParagraphs(node *html.Node) []*html.Node {
+	var paragraphs []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "p" {
+		paragraphs = append(paragraphs, node)
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		paragraphs = append(paragraphs, findParagraphs(child)...)
+	}
+
+	return paragraphs
+}
+
+// Find all <tr> elements in <tbody>, excluding the first one
+func findTableRows(node *html.Node) []*html.Node {
+	var tableRows []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "tbody" {
+		child := node.FirstChild
+		for child != nil {
+			if child.Type == html.ElementNode && child.Data == "tr" {
+				tableRows = append(tableRows, child)
+			}
+			child = child.NextSibling
+		}
+	}
+
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		var tableRowElement = findTableRows(child)
+		if tableRowElement != nil {
+			tableRows = append(tableRows, tableRowElement...)
+		}
+	}
+
+	// check if tableRows is nil
+	if tableRows == nil {
+		return []*html.Node{}
+	} else {
+		return tableRows
+	}
+}
+
+// Find all <p> elements in the HTML document
+func findTables(node *html.Node) []*html.Node {
+	var tables []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "table" {
+		tables = append(tables, node)
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		tables = append(tables, findDayTables(child)...)
+	}
+
+	return tables
+}
+
+// Find all <p> elements in the HTML document
+func findDayTables(node *html.Node) []*html.Node {
+	var tables []*html.Node
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		tables = append(tables, findDayTables(child)...)
+	}
+
+	if node.Type == html.ElementNode && node.Data == "table" && hasClassAttribute(node, "spreadsheet") {
+		tables = append(tables, node)
+	}
+
+	return tables
+}
+
+// Get the text content of the specified node and its descendants
+func getDayLabel(node *html.Node) string {
+
+	child := node.FirstChild
+	if child != nil {
+		if child.Type == html.ElementNode && child.Data == "span" {
+			if child.FirstChild != nil {
+				return child.FirstChild.Data
+			}
+		}
+	}
+	return ""
+}
+
+// Find all <td> elements in the current <tr>
+func findTableData(node *html.Node) []*html.Node {
+	var tableData []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "tr" {
+		child := node.FirstChild
+		for child != nil {
+			if child.Type == html.ElementNode && child.Data == "td" {
+				tableData = append(tableData, child)
+			}
+			child = child.NextSibling
+		}
+	}
+	return tableData
+}
+
+// Get the text content of the specified node and its descendants
+func getTextContent(node *html.Node) string {
+	var textContent string
+
+	if node.Type == html.TextNode {
+		textContent = node.Data
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		textContent += getTextContent(child)
+	}
+
+	return textContent
+}

services/data-manager/service/fetch/v2/eventParser.go

@@ -0,0 +1,67 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v2
+
+import (
+	"github.com/pocketbase/pocketbase/tools/types"
+	"golang.org/x/net/html"
+	"htwkalender/model"
+	"htwkalender/service/date"
+	"htwkalender/service/functions"
+	"strings"
+)
+
+func toEvents(tables [][]*html.Node, days []string) []model.Event {
+	var events []model.Event
+
+	for table := range tables {
+		for row := range tables[table] {
+
+			tableData := findTableData(tables[table][row])
+			if len(tableData) > 0 {
+				start, _ := types.ParseDateTime(date.CreateTimeFromHourAndMinuteString(getTextContent(tableData[1])))
+				end, _ := types.ParseDateTime(date.CreateTimeFromHourAndMinuteString(getTextContent(tableData[2])))
+
+				courses := getTextContent(tableData[7])
+				name := getTextContent(tableData[3])
+				if functions.OnlyWhitespace(name) {
+					name = "Sonderveranstaltung"
+				}
+
+				if len(courses) > 0 {
+					for _, course := range strings.Split(courses, " ") {
+						events = append(events, model.Event{
+							Day:       days[table],
+							Week:      getTextContent(tableData[0]),
+							Start:     start,
+							End:       end,
+							Name:      name,
+							EventType: getTextContent(tableData[4]),
+							Notes:     getTextContent(tableData[5]),
+							Prof:      getTextContent(tableData[6]),
+							Rooms:     getTextContent(tableData[8]),
+							BookedAt:  getTextContent(tableData[10]),
+							Course:    strings.TrimSpace(course),
+						})
+					}
+				}
+			}
+		}
+
+	}
+	return events
+}

services/data-manager/service/fetch/v2/fetcher.go

@@ -0,0 +1,181 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v2
+
+import (
+	"fmt"
+	"github.com/google/uuid"
+	"github.com/pocketbase/pocketbase"
+	"golang.org/x/net/html"
+	"htwkalender/model"
+	"htwkalender/service/db"
+	"htwkalender/service/fetch"
+	v1 "htwkalender/service/fetch/v1"
+	"htwkalender/service/functions"
+	localTime "htwkalender/service/functions/time"
+	"log/slog"
+	"strings"
+)
+
+func ParseEventsFromRemote(app *pocketbase.PocketBase) (model.Events, error) {
+	savedRecords, err := FetchAllEventsAndSave(app, localTime.RealClock{})
+	if err != nil {
+		return nil, err
+	}
+	return savedRecords, nil
+}
+
+func FetchAllEventsAndSave(app *pocketbase.PocketBase, clock localTime.Clock) ([]model.Event, error) {
+	var savedRecords []model.Event
+	var err error = nil
+
+	var stubUrl = [2]string{
+		"https://stundenplan.htwk-leipzig.de/",
+		"/Berichte/Text-Listen;Veranstaltungsarten;name;" +
+			"Vp%0A" +
+			"Vw%0A" +
+			"V%0A" +
+			"Sp%0A" +
+			"Sw%0A" +
+			"S%0A" +
+			"Pp%0A" +
+			"Pw%0A" +
+			"P%0A" +
+			"ZV%0A" +
+			"Tut%0A" +
+			"Sperr%0A" +
+			"pf%0A" +
+			"wpf%0A" +
+			"fak%0A" +
+			"Pruefung%0A" +
+			"gebucht%0A" +
+			"Vertretung%0A" +
+			"Fremdveranst.%0A" +
+			"Buchen%0A" +
+			"%0A?&template=sws_modul&weeks=1-65&combined=yes",
+	}
+
+	// Fetch and save events for all semesters
+	for _, semester := range functions.CalculateSemesterList(clock) {
+		events, fetchErr := fetchAndSaveAllEventsForSemester(app, semester, stubUrl)
+		if fetchErr != nil {
+			return nil, fmt.Errorf("failed to fetch and save events for "+semester+": %w", err)
+		}
+		savedRecords = append(savedRecords, events...)
+	}
+
+	return savedRecords, err
+}
+
+func fetchAndSaveAllEventsForSemester(
+	app *pocketbase.PocketBase,
+	semester string,
+	stubUrl [2]string,
+) ([]model.Event, error) {
+	var savedRecords []model.Event
+	url := stubUrl[0] + semester + stubUrl[1]
+	events, err := parseEventForOneSemester(url)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse events for "+semester+": %w", err)
+	}
+	err = db.DeleteAllEventsBySemesterWithoutCourse(app, "Sport", semester)
+	if err != nil {
+		return nil, fmt.Errorf("failed to delete all events for "+semester+": %w", err)
+	}
+	savedEvents, dbError := db.SaveEvents(events, app)
+	if dbError != nil {
+		return nil, fmt.Errorf("failed to save events for "+semester+": %w", dbError)
+	}
+	savedRecords = append(savedRecords, savedEvents...)
+	return savedRecords, err
+}
+
+func parseEventForOneSemester(url string) ([]model.Event, error) {
+	// Fetch Webpage from URL
+	webpage, err := fetch.GetHTML(url)
+	if err != nil {
+		return nil, err
+	}
+
+	// Parse HTML to Node Tree
+	var doc *html.Node
+	doc, err = parseHTML(webpage)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get all event tables and all day labels
+	eventTables := getEventTables(doc)
+	allDayLabels := getAllDayLabels(doc)
+	eventsWithCombinedWeeks := toEvents(eventTables, allDayLabels)
+
+	splitEventsByWeekVal := splitEventsByWeek(eventsWithCombinedWeeks)
+	events := splitEventsBySingleWeek(splitEventsByWeekVal)
+
+	if events == nil {
+		return nil, err
+	}
+
+	table := findFirstTable(doc)
+
+	if table == nil {
+		return nil, fmt.Errorf("failed to find first table")
+	}
+
+	semesterString := findFirstSpanWithClass(table, "header-0-2-0").FirstChild.Data
+	semester, year := extractSemesterAndYear(semesterString)
+	events = convertWeeksToDates(events, semester, year)
+	events, err = v1.SplitEventType(events)
+	if err != nil {
+		slog.Error("Error occurred while splitting event types: ", "error", err)
+		return nil, err
+	}
+	events = switchNameAndNotesForExam(events)
+	events = generateUUIDs(events)
+
+	return events, nil
+}
+
+// switch name and notes for Pruefung events when Note is not empty and Name starts with "Prüfungen" and contains email
+func switchNameAndNotesForExam(events []model.Event) []model.Event {
+	for i, event := range events {
+		if event.EventType == "Pruefung" {
+			if event.Notes != "" && strings.HasPrefix(event.Name, "Prüfungen") && strings.Contains(event.Name, "@") {
+				events[i].Name = event.Notes
+				events[i].Notes = event.Name
+			}
+		}
+	}
+	return events
+}
+
+func parseHTML(webpage string) (*html.Node, error) {
+	doc, err := html.Parse(strings.NewReader(webpage))
+	if err != nil {
+		return nil, err
+	}
+	return doc, nil
+}
+
+func generateUUIDs(events []model.Event) []model.Event {
+	for i, event := range events {
+		// generate a hash value from the event name, course and semester
+		hash := uuid.NewSHA1(uuid.NameSpaceOID, []byte(event.Name+event.Course))
+		events[i].UUID = hash.String()
+	}
+	return events
+}

services/data-manager/service/fetch/v2/fetcher_test.go

@@ -0,0 +1,99 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v2
+
+import (
+	"htwkalender/model"
+	"reflect"
+	"testing"
+)
+
+func Test_switchNameAndNotesForExam(t *testing.T) {
+	type args struct {
+		events []model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want []model.Event
+	}{
+		{
+			name: "switch name and notes for exam",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Pruefung",
+						Name:      "Prüfungen FING/EIT WiSe (pruefungsamt.fing-eit@htwk-leipzig.de)",
+						Notes:     "Computer Vision II - Räume/Zeit unter Vorbehalt- (Raum W111.1)",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType: "Pruefung",
+					Name:      "Computer Vision II - Räume/Zeit unter Vorbehalt- (Raum W111.1)",
+					Notes:     "Prüfungen FING/EIT WiSe (pruefungsamt.fing-eit@htwk-leipzig.de)",
+				},
+			},
+		},
+		{
+			name: "dont switch name and notes for exam",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Pruefung",
+						Name:      "i054 Umweltschutz und Recycling DPB & VNB 7.FS (wpf)",
+						Notes:     "Prüfung",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType: "Pruefung",
+					Notes:     "Prüfung",
+					Name:      "i054 Umweltschutz und Recycling DPB & VNB 7.FS (wpf)",
+				},
+			},
+		},
+		{
+			name: "dont switch name and notes for exam",
+			args: args{
+				events: []model.Event{
+					{
+						EventType: "Pruefung",
+						Name:      "Prüfungen FING/ME WiSe (pruefungsamt.fing-me@htwk-leipzig.de)",
+						Notes:     "",
+					},
+				},
+			},
+			want: []model.Event{
+				{
+					EventType: "Pruefung",
+					Notes:     "",
+					Name:      "Prüfungen FING/ME WiSe (pruefungsamt.fing-me@htwk-leipzig.de)",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := switchNameAndNotesForExam(tt.args.events); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("switchNameAndNotesForExam() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/fetch/v2/htmlParsingFunctions.go

@@ -0,0 +1,340 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package v2
+
+import (
+	"github.com/pocketbase/pocketbase/tools/types"
+	"golang.org/x/net/html"
+	"htwkalender/model"
+	"htwkalender/service/date"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Find the first <table> element in the HTML document
+func findFirstTable(node *html.Node) *html.Node {
+	if node.Type == html.ElementNode && node.Data == "table" {
+		return node
+	}
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		found := findFirstTable(child)
+		if found != nil {
+			return found
+		}
+	}
+	return nil
+}
+
+// Find the first <span> element with the specified class attribute value
+func findFirstSpanWithClass(node *html.Node, classValue string) *html.Node {
+
+	// Check if the current node is a <span> element with the specified class attribute value
+	if node.Type == html.ElementNode && node.Data == "span" {
+		if hasClassAttribute(node, classValue) {
+			return node
+		}
+	}
+
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		found := findFirstSpanWithClass(child, classValue)
+		if found != nil {
+			return found
+		}
+	}
+	return nil
+}
+
+// Check if the specified element has the specified class attribute value
+func hasClassAttribute(node *html.Node, classValue string) bool {
+	for _, attr := range node.Attr {
+		if attr.Key == "class" && strings.Contains(attr.Val, classValue) {
+			return true
+		}
+	}
+	return false
+}
+
+// Get Tables with days
+func getEventTables(node *html.Node) [][]*html.Node {
+	var eventTables [][]*html.Node
+	tables := findTables(node)
+	// get all tables with events
+	for events := range tables {
+		rows := findTableRows(tables[events])
+		// check that a first row exists
+		if len(rows) > 0 {
+			rows = rows[1:]
+			eventTables = append(eventTables, rows)
+		}
+	}
+	return eventTables
+}
+
+// Get Tables with days
+func getAllDayLabels(node *html.Node) []string {
+	paragraphs := findParagraphs(node)
+	var dayArray []string
+
+	for _, p := range paragraphs {
+		label := getDayLabel(p)
+		if label != "" {
+			dayArray = append(dayArray, label)
+		}
+	}
+	return dayArray
+}
+
+// Find all <p> elements in the HTML document
+func findParagraphs(node *html.Node) []*html.Node {
+	var paragraphs []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "p" {
+		paragraphs = append(paragraphs, node)
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		paragraphs = append(paragraphs, findParagraphs(child)...)
+	}
+
+	return paragraphs
+}
+
+// Find all <tr> elements in <tbody>, excluding the first one
+func findTableRows(node *html.Node) []*html.Node {
+	var tableRows []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "tbody" {
+		child := node.FirstChild
+		for child != nil {
+			if child.Type == html.ElementNode && child.Data == "tr" {
+				tableRows = append(tableRows, child)
+			}
+			child = child.NextSibling
+		}
+	}
+
+	// Traverse child nodes recursively
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		var tableRowElement = findTableRows(child)
+		if tableRowElement != nil {
+			tableRows = append(tableRows, tableRowElement...)
+		}
+	}
+
+	// check if tableRows is nil
+	if tableRows == nil {
+		return []*html.Node{}
+	} else {
+		return tableRows
+	}
+}
+
+// Find all <p> elements in the HTML document
+func findTables(node *html.Node) []*html.Node {
+	var tables []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "table" {
+		tables = append(tables, node)
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		tables = append(tables, findDayTables(child)...)
+	}
+
+	return tables
+}
+
+// Find all <p> elements in the HTML document
+func findDayTables(node *html.Node) []*html.Node {
+	var tables []*html.Node
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		tables = append(tables, findDayTables(child)...)
+	}
+
+	if node.Type == html.ElementNode && node.Data == "table" && hasClassAttribute(node, "spreadsheet") {
+		tables = append(tables, node)
+	}
+
+	return tables
+}
+
+// Get the text content of the specified node and its descendants
+func getDayLabel(node *html.Node) string {
+
+	child := node.FirstChild
+	if child != nil {
+		if child.Type == html.ElementNode && child.Data == "span" {
+			if child.FirstChild != nil {
+				return child.FirstChild.Data
+			}
+		}
+	}
+	return ""
+}
+
+// Find all <td> elements in the current <tr>
+func findTableData(node *html.Node) []*html.Node {
+	var tableData []*html.Node
+
+	if node.Type == html.ElementNode && node.Data == "tr" {
+		child := node.FirstChild
+		for child != nil {
+			if child.Type == html.ElementNode && child.Data == "td" {
+				tableData = append(tableData, child)
+			}
+			child = child.NextSibling
+		}
+	}
+
+	return tableData
+}
+
+// Get the text content of the specified node and its descendants
+func getTextContent(node *html.Node) string {
+	var textContent string
+
+	if node.Type == html.TextNode {
+		textContent = node.Data
+	}
+
+	for child := node.FirstChild; child != nil; child = child.NextSibling {
+		textContent += getTextContent(child)
+	}
+
+	return textContent
+}
+
+func splitEventsByWeek(events []model.Event) []model.Event {
+	var newEvents []model.Event
+
+	for _, event := range events {
+		weeks := strings.Split(event.Week, ",")
+		for _, week := range weeks {
+			newEvent := event
+			newEvent.Week = strings.TrimSpace(week)
+			newEvents = append(newEvents, newEvent)
+		}
+	}
+	return newEvents
+}
+
+func splitEventsBySingleWeek(events []model.Event) []model.Event {
+	var newEvents []model.Event
+
+	for _, event := range events {
+		if strings.Contains(event.Week, "-") {
+			weeks := splitWeekRange(event.Week)
+			for _, week := range weeks {
+				newEvent := event
+				newEvent.Week = week
+				newEvents = append(newEvents, newEvent)
+			}
+		} else {
+			newEvents = append(newEvents, event)
+		}
+	}
+	return newEvents
+}
+
+func splitWeekRange(weekRange string) []string {
+	parts := strings.Split(weekRange, "-")
+	if len(parts) != 2 {
+		return nil // Invalid format
+	}
+
+	start, errStart := strconv.Atoi(strings.TrimSpace(parts[0]))
+	end, errEnd := strconv.Atoi(strings.TrimSpace(parts[1]))
+
+	if errStart != nil || errEnd != nil {
+		return nil // Error converting to integers
+	}
+
+	var weeks []string
+	for i := start; i <= end; i++ {
+		weeks = append(weeks, strconv.Itoa(i))
+	}
+
+	return weeks
+}
+
+func extractSemesterAndYear(semesterString string) (string, string) {
+	winterPattern := "Wintersemester"
+	summerPattern := "Sommersemester"
+
+	winterMatch := strings.Contains(semesterString, winterPattern)
+	summerMatch := strings.Contains(semesterString, summerPattern)
+
+	semester := ""
+	semesterShortcut := ""
+
+	if winterMatch {
+		semester = "Wintersemester"
+		semesterShortcut = "ws"
+	} else if summerMatch {
+		semester = "Sommersemester"
+		semesterShortcut = "ss"
+	} else {
+		return "", ""
+	}
+
+	yearPattern := `\d{4}`
+	combinedPattern := semester + `\s` + yearPattern
+	re := regexp.MustCompile(combinedPattern)
+	match := re.FindString(semesterString)
+	year := ""
+
+	if match != "" {
+		reYear := regexp.MustCompile(yearPattern)
+		year = reYear.FindString(match)
+	}
+	return semesterShortcut, year
+}
+
+func convertWeeksToDates(events []model.Event, semester string, year string) []model.Event {
+	var newEvents []model.Event
+	eventYear, _ := strconv.Atoi(year)
+
+	// for each event we need to calculate the start and end date based on the week and the year
+	for _, event := range events {
+		eventWeek, _ := strconv.Atoi(event.Week)
+		eventDay, _ := date.GetDateFromWeekNumber(eventYear, eventWeek, event.Day)
+		start := replaceTimeForDate(eventDay, event.Start.Time())
+		end := replaceTimeForDate(eventDay, event.End.Time())
+
+		//Check if end is before start
+		if end.Before(start) {
+			end = end.AddDate(0, 0, 1)
+		}
+
+		newEvent := event
+		newEvent.Start, _ = types.ParseDateTime(start.In(time.UTC))
+		newEvent.End, _ = types.ParseDateTime(end.In(time.UTC))
+		newEvent.Semester = semester
+		newEvents = append(newEvents, newEvent)
+	}
+	return newEvents
+}
+
+// replaceTimeForDate replaces hour, minute, second, nsec for the selected date
+func replaceTimeForDate(date time.Time, replacementTime time.Time) time.Time {
+	return time.Date(date.Year(), date.Month(), date.Day(), replacementTime.Hour(), replacementTime.Minute(), replacementTime.Second(), replacementTime.Nanosecond(), date.Location())
+}

services/data-manager/service/functions/semester.go

@@ -0,0 +1,47 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package functions
+
+import (
+	localTime "htwkalender/service/functions/time"
+	"time"
+)
+
+// GetCurrentSemesterString returns the current semester as string
+// if current month is between 10 and 03 -> winter semester "ws"
+func GetCurrentSemesterString(localeTime localTime.Clock) string {
+	if localeTime.Now().Month() >= 10 || localeTime.Now().Month() <= 3 {
+		return "ws"
+	} else {
+		return "ss"
+	}
+}
+
+func CalculateSemesterList(clock localTime.Clock) []string {
+	summerSemester := clock.Now().Month() >= time.March && clock.Now().Month() <= time.September
+	winterSemester := clock.Now().Month() <= time.March || clock.Now().Month() >= time.September
+
+	if summerSemester && !winterSemester {
+		return []string{"ss"}
+	}
+
+	if !summerSemester && winterSemester {
+		return []string{"ws"}
+	}
+
+	return []string{"ss", "ws"}
+}

services/data-manager/service/functions/semester_test.go

@@ -0,0 +1,91 @@
+package functions
+
+import (
+	mockTime "htwkalender/service/functions/time"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func Test_calculateSemesterList(t *testing.T) {
+	type args struct {
+		clock mockTime.Clock
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{
+			name: "is summer semester",
+			args: args{
+				clock: mockTime.MockClock{
+					NowTime: time.Date(2024, 6, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: []string{"ss"},
+		},
+		{
+			name: "is winter semester",
+			args: args{
+				clock: mockTime.MockClock{
+					NowTime: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: []string{"ws"},
+		},
+		{
+			name: "is in both",
+			args: args{
+				clock: mockTime.MockClock{
+					NowTime: time.Date(2024, 3, 22, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: []string{"ss", "ws"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := CalculateSemesterList(tt.args.clock); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("calculateSemesterList() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestGetCurrentSemesterString(t *testing.T) {
+	type args struct {
+		localeTime mockTime.Clock
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "is winter semester",
+			args: args{
+				localeTime: mockTime.MockClock{
+					NowTime: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: "ws",
+		},
+		{
+			name: "is summer semester",
+			args: args{
+				localeTime: mockTime.MockClock{
+					NowTime: time.Date(2024, 6, 1, 0, 0, 0, 0, time.UTC),
+				},
+			},
+			want: "ss",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := GetCurrentSemesterString(tt.args.localeTime); got != tt.want {
+				t.Errorf("GetCurrentSemesterString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/functions/string.go

@@ -0,0 +1,62 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package functions
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"strings"
+)
+
+// check if string is empty or contains only whitespaces
+func OnlyWhitespace(word string) bool {
+	return len(strings.TrimSpace(word)) == 0
+}
+
+// return function to check if rune is a separator
+func IsSeparator(separator []rune) func(rune) bool {
+	return func(character rune) bool {
+		for _, sep := range separator {
+			if sep == character {
+				return true
+			}
+		}
+		return false
+	}
+}
+
+func Contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+func HashString(s string) string {
+	hash := sha256.New()
+	hash.Write([]byte(s))
+	hashInBytes := hash.Sum(nil)
+	return hex.EncodeToString(hashInBytes)
+}
+
+func SeperateRoomString(rooms string) []string {
+	return strings.FieldsFunc(rooms, IsSeparator(
+		[]rune{',', '\t', '\n', '\r', ';', ' ', '\u00A0'}),
+	)
+}

services/data-manager/service/functions/string_test.go

@@ -0,0 +1,145 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package functions
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestOnlyWhitespace(t *testing.T) {
+	type args struct {
+		word string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{"empty string", args{""}, true},
+		{"whitespace", args{" "}, true},
+		{"whitespaces", args{"   "}, true},
+		{"whitespaces and tabs", args{"   \t"}, true},
+		{"whitespaces and tabs and newlines", args{"   \t\n"}, true},
+		{"whitespaces and tabs and newlines and non-breaking spaces", args{"   \t\n\u00A0"}, true},
+		{"non-whitespace", args{"a"}, false},
+		{"non-whitespaces", args{"abc"}, false},
+		{"non-whitespaces and tabs", args{"abc\t"}, false},
+		{"non-whitespaces and tabs and newlines", args{"abc\t\n"}, false},
+		{"non-whitespaces and tabs and newlines and non-breaking spaces", args{"abc\t\n\u00A0"}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := OnlyWhitespace(tt.args.word); got != tt.want {
+				t.Errorf("OnlyWhitespace() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestHashString(t *testing.T) {
+	type args struct {
+		s string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{"empty string", args{""}, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
+		{"non-empty string", args{"abc"}, "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := HashString(tt.args.s); got != tt.want {
+				t.Errorf("HashString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestIsSeparator(t *testing.T) {
+	type args struct {
+		separator []rune
+		character rune
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{"empty separator", args{[]rune{}, 'a'}, false},
+		{"separator with one rune equal", args{[]rune{'a'}, 'a'}, true},
+		{"separator with one rune different", args{[]rune{'a'}, 'b'}, false},
+		{"separator with two runes equal", args{[]rune{'a', 'b'}, 'a'}, true},
+		{"separator with two runes equal second", args{[]rune{'a', 'b'}, 'b'}, true},
+		{"separator with two runes different", args{[]rune{'a', 'b'}, 'c'}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := IsSeparator(tt.args.separator)(tt.args.character); got != tt.want {
+				t.Errorf("IsSeparator()() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestContains(t *testing.T) {
+	type args struct {
+		s []string
+		e string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{"empty slice", args{[]string{}, "a"}, false},
+		{"slice with one element equal", args{[]string{"a"}, "a"}, true},
+		{"slice with one element different", args{[]string{"a"}, "b"}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := Contains(tt.args.s, tt.args.e); got != tt.want {
+				t.Errorf("Contains() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestSeperateRoomString(t *testing.T) {
+	type args struct {
+		rooms string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{"empty string", args{""}, []string{}},
+		{"one room", args{"a"}, []string{"a"}},
+		{"two rooms", args{"a,b"}, []string{"a", "b"}},
+		{"two rooms with whitespace", args{"a, b"}, []string{"a", "b"}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := SeperateRoomString(tt.args.rooms); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("SeperateRoomString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/functions/time/mockClock.go

@@ -0,0 +1,26 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package time
+
+import "time"
+
+type MockClock struct {
+	NowTime time.Time
+}
+
+func (m MockClock) Now() time.Time                       { return m.NowTime }
+func (MockClock) After(d time.Duration) <-chan time.Time { return time.After(d) }

services/data-manager/service/functions/time/parse.go

@@ -0,0 +1,36 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package time
+
+import (
+	"github.com/pocketbase/pocketbase/tools/types"
+	"log/slog"
+	"time"
+)
+
+func ParseTime(timeString string) (time.Time, error) {
+	return time.Parse("2006-01-02T15:04:05Z", timeString)
+}
+
+func ParseAsTypesDatetime(time time.Time) types.DateTime {
+	dateTime, err := types.ParseDateTime(time)
+	if err != nil {
+		slog.Error("Failed to parse time as types.DateTime", "error", err)
+		return types.DateTime{}
+	}
+	return dateTime
+}

services/data-manager/service/functions/time/realClock.go

@@ -0,0 +1,24 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package time
+
+import "time"
+
+type RealClock struct{}
+
+func (RealClock) Now() time.Time                         { return time.Now() }
+func (RealClock) After(d time.Duration) <-chan time.Time { return time.After(d) }

services/data-manager/service/functions/time/time.go

@@ -0,0 +1,24 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package time
+
+import "time"
+
+type Clock interface {
+	Now() time.Time
+	After(d time.Duration) <-chan time.Time
+}

services/data-manager/service/ical/ical.go

@@ -0,0 +1,50 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package ical
+
+import (
+	"encoding/json"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/apis"
+	"htwkalender/model"
+	"htwkalender/service/db"
+)
+
+func CreateIndividualFeed(requestBody []byte, app *pocketbase.PocketBase) (string, error) {
+	var modules []model.FeedCollection
+
+	err := json.Unmarshal(requestBody, &modules)
+	if err != nil {
+		return "", apis.NewNotFoundError("Could not parse request body", err)
+	}
+
+	var icalFeed model.Feed
+	jsonModules, _ := json.Marshal(modules)
+	icalFeed.Modules = string(jsonModules)
+
+	collection, dbError := db.FindCollection(app, "feeds")
+	if dbError != nil {
+		return "", apis.NewNotFoundError("Collection could not be found", dbError)
+	}
+
+	record, err := db.SaveFeed(icalFeed, collection, app)
+	if err != nil {
+		return "", apis.NewNotFoundError("Could not save feed", err)
+	}
+
+	return record.Id, nil
+}

services/data-manager/service/ical/icalFileGeneration.go

@@ -0,0 +1,173 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package ical
+
+import (
+	"htwkalender/model"
+	"htwkalender/service/functions"
+	clock "htwkalender/service/functions/time"
+	"htwkalender/service/names"
+	"time"
+
+	"github.com/jordic/goics"
+	_ "time/tzdata"
+)
+
+// IcalModel local type for EmitICal function
+type IcalModel struct {
+	Events  model.Events
+	Mapping map[string]model.FeedCollection
+}
+
+// EmitICal implements the interface for goics
+func (icalModel IcalModel) EmitICal() goics.Componenter {
+	internalClock := clock.RealClock{}
+	c := generateIcalEmit(icalModel, internalClock)
+	return c
+}
+
+func generateIcalEmit(icalModel IcalModel, internalClock clock.Clock) *goics.Component {
+	europeTime, _ := time.LoadLocation("Europe/Berlin")
+	c := goics.NewComponent()
+	c.SetType("VCALENDAR")
+	// PRODID is required by the standard
+	c.AddProperty("PRODID", "-//HTWK Kalender//htwkalender.de//DE")
+
+	c.AddProperty("VERSION", "2.0")
+	c.AddProperty("CALSCALE", "GREGORIAN")
+	c.AddProperty("TZID", "EUROPE/BERLIN")
+	c.AddProperty("X-WR-CALNAME", "HTWK Kalender")
+	c.AddProperty("X-WR-TIMEZONE", "EUROPE/BERLIN")
+	//add v time zone
+	icalModel.vtimezone(c)
+
+	for _, event := range icalModel.Events {
+		mapEntry, mappingFound := icalModel.Mapping[event.UUID]
+
+		s := goics.NewComponent()
+		s.SetType("VEVENT")
+
+		s.AddProperty(goics.FormatDateTime("DTSTAMP", internalClock.Now().Local().In(europeTime)))
+
+		// create a unique id for the event by hashing the event start, end, course and name
+		var eventHash = functions.HashString(event.Start.String() + event.End.String() + event.Course + event.Name + event.Rooms)
+
+		s.AddProperty("UID", eventHash+"@htwkalender.de")
+		s.AddProperty(goics.FormatDateTime("DTEND", event.End.Time().Local().In(europeTime)))
+		s.AddProperty(goics.FormatDateTime("DTSTART", event.Start.Time().Local().In(europeTime)))
+
+		if mappingFound {
+			addPropertyIfNotEmpty(s, "SUMMARY", replaceNameIfUserDefined(&event, mapEntry))
+			addAlarmIfSpecified(s, event, mapEntry, internalClock)
+		} else {
+			addPropertyIfNotEmpty(s, "SUMMARY", event.Name)
+		}
+
+		addPropertyIfNotEmpty(s, "DESCRIPTION", generateDescription(event))
+		addPropertyIfNotEmpty(s, "LOCATION", event.Rooms)
+		c.AddComponent(s)
+	}
+	return c
+}
+
+func (icalModel IcalModel) vtimezone(c *goics.Component) {
+	tz := goics.NewComponent()
+	tz.SetType("VTIMEZONE")
+	tz.AddProperty("TZID", "EUROPE/BERLIN")
+	//add standard time
+	icalModel.standard(tz)
+	//add daylight time
+	icalModel.daylight(tz)
+
+	c.AddComponent(tz)
+}
+
+func (icalModel IcalModel) standard(tz *goics.Component) {
+	st := NewHtwkalenderComponent()
+	st.SetType("STANDARD")
+	st.AddProperty("DTSTART", "19701025T030000")
+	st.AddProperty("RRULE", "FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU")
+	st.AddProperty("TZOFFSETFROM", "+0200")
+	st.AddProperty("TZOFFSETTO", "+0100")
+	st.AddProperty("TZNAME", "CET")
+	tz.AddComponent(st)
+}
+
+// create an override for goics component function Write
+// to add the RRULE property
+
+func (icalModel IcalModel) daylight(tz *goics.Component) {
+	dt := NewHtwkalenderComponent()
+	dt.SetType("DAYLIGHT")
+	dt.AddProperty("DTSTART", "19700329T020000")
+	dt.AddProperty("TZOFFSETFROM", "+0100")
+	dt.AddProperty("TZOFFSETTO", "+0200")
+	dt.AddProperty("TZNAME", "CEST")
+	dt.AddProperty("RRULE", "FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU")
+	tz.AddComponent(dt)
+}
+
+// if reminder is specified in the configuration for this event, an alarm will be added to the event
+func addAlarmIfSpecified(s *goics.Component, event model.Event, mapping model.FeedCollection, clock clock.Clock) {
+	// if event.Start > now
+	// then add alarm
+	if event.Start.Time().Local().After(clock.Now().Local()) && mapping.Reminder {
+		a := goics.NewComponent()
+		a.SetType("VALARM")
+		a.AddProperty("TRIGGER", "-P0DT0H15M0S")
+		a.AddProperty("ACTION", "DISPLAY")
+		a.AddProperty("DESCRIPTION", "Next course: "+replaceNameIfUserDefined(&event, mapping)+" in "+event.Rooms)
+		s.AddComponent(a)
+	}
+}
+
+// replaceNameIfUserDefined replaces the name of the event with the user defined name if it is not empty
+// all contained template strings will be replaced with the corresponding values from the event
+func replaceNameIfUserDefined(event *model.Event, mapping model.FeedCollection) string {
+	if !functions.OnlyWhitespace(mapping.UserDefinedName) {
+		return names.ReplaceTemplateSubStrings(mapping.UserDefinedName, *event)
+	}
+
+	return event.Name
+}
+
+// AddPropertyIfNotEmpty adds a property to the component if the value is not empty
+// or contains only whitespaces
+func addPropertyIfNotEmpty(component *goics.Component, key string, value string) {
+	if !functions.OnlyWhitespace(value) {
+		component.AddProperty(key, value)
+	}
+}
+
+func generateDescription(event model.Event) string {
+	var description string
+
+	if !functions.OnlyWhitespace(event.Prof) {
+		description += "Profs: " + event.Prof + "\n"
+	}
+	if !functions.OnlyWhitespace(event.Course) {
+		description += "Gruppen: " + event.Course + "\n"
+	}
+	if !functions.OnlyWhitespace(event.EventType) {
+		description += "Typ: " + event.EventType + event.Compulsory + "\n"
+	}
+	if !functions.OnlyWhitespace(event.Notes) {
+		description += "Notizen: " + event.Notes + "\n"
+	}
+
+	return description
+}

services/data-manager/service/ical/icalFileGeneration_test.go

@@ -0,0 +1,258 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package ical
+
+import (
+	"github.com/jordic/goics"
+	"htwkalender/model"
+	mockTime "htwkalender/service/functions/time"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func TestIcalModel_EmitICal(t *testing.T) {
+	type fields struct {
+		Events  model.Events
+		Mapping map[string]model.FeedCollection
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   *goics.Component
+	}{
+		{
+			name: "Test EmitICal",
+			fields: fields{
+				Events: model.Events{
+					{
+						UUID:      "123",
+						Name:      "Test",
+						EventType: "Test",
+						Notes:     "Test",
+						Prof:      "Test",
+						Rooms:     "Test",
+						BookedAt:  "Test",
+					},
+				},
+				Mapping: map[string]model.FeedCollection{
+					"123": {
+						UUID:            "123",
+						Name:            "Test",
+						Course:          "Test",
+						UserDefinedName: "Test",
+					},
+				},
+			},
+			want: &goics.Component{
+				Tipo: "VCALENDAR",
+				Elements: []goics.Componenter{
+					&goics.Component{
+						Tipo: "VTIMEZONE",
+						Elements: []goics.Componenter{
+							&HtwkalenderComponent{
+								Component: &goics.Component{
+									Tipo:     "STANDARD",
+									Elements: []goics.Componenter{},
+									Properties: map[string][]string{
+										"DTSTART":      {"19701025T030000"},
+										"RRULE":        {"FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU"},
+										"TZOFFSETFROM": {"+0200"},
+										"TZOFFSETTO":   {"+0100"},
+										"TZNAME":       {"CET"},
+									},
+								},
+							},
+							&HtwkalenderComponent{
+								Component: &goics.Component{
+									Tipo:     "DAYLIGHT",
+									Elements: []goics.Componenter{},
+									Properties: map[string][]string{
+										"DTSTART":      {"19700329T020000"},
+										"TZOFFSETFROM": {"+0100"},
+										"TZOFFSETTO":   {"+0200"},
+										"TZNAME":       {"CEST"},
+										"RRULE":        {"FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU"},
+									},
+								},
+							},
+						},
+						Properties: map[string][]string{
+							"TZID": {"EUROPE/BERLIN"},
+						},
+					},
+					&goics.Component{
+						Tipo:     "VEVENT",
+						Elements: []goics.Componenter{},
+						Properties: map[string][]string{
+							"DTSTAMP":     {"20231201T000000Z"},
+							"UID":         {"a8d627d93f518e9096b6f40e36d27b7660fa26d318ef1adc43da750e49ebe4be@htwkalender.de"},
+							"DTEND":       {"00010101T000000Z"},
+							"DTSTART":     {"00010101T000000Z"},
+							"SUMMARY":     {"Test"},
+							"DESCRIPTION": {"Profs: Test\nTyp: Test\nNotizen: Test\n"},
+							"LOCATION":    {"Test"},
+						},
+					},
+				},
+				Properties: map[string][]string{
+					"PRODID":        {"-//HTWK Kalender//htwkalender.de//DE"},
+					"VERSION":       {"2.0"},
+					"CALSCALE":      {"GREGORIAN"},
+					"TZID":          {"EUROPE/BERLIN"},
+					"X-WR-CALNAME":  {"HTWK Kalender"},
+					"X-WR-TIMEZONE": {"EUROPE/BERLIN"},
+				},
+			},
+		},
+		{
+			name: "Test Similar Events like Sport Courses",
+			fields: fields{
+				Events: model.Events{
+					{
+						UUID:      "123",
+						Name:      "Test",
+						Course:    "Test",
+						EventType: "Test",
+						Notes:     "Test",
+						Prof:      "Test",
+						Rooms:     "ZU430",
+						BookedAt:  "Test",
+						Start:     mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:       mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 1, 0, 0, 0, time.UTC)),
+					},
+					{
+						UUID:      "123",
+						Name:      "Test",
+						Course:    "Test",
+						EventType: "Test",
+						Notes:     "Test",
+						Prof:      "Test",
+						Rooms:     "ZU221",
+						BookedAt:  "Test",
+						Start:     mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
+						End:       mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 1, 0, 0, 0, time.UTC)),
+					},
+				},
+				Mapping: map[string]model.FeedCollection{
+					"123": {
+						UUID:            "123",
+						Name:            "Test",
+						Course:          "Test",
+						UserDefinedName: "UserDefinedName",
+					},
+				},
+			},
+			want: &goics.Component{
+				Tipo: "VCALENDAR",
+				Elements: []goics.Componenter{
+					&goics.Component{
+						Tipo: "VTIMEZONE",
+						Elements: []goics.Componenter{
+							&HtwkalenderComponent{
+								Component: &goics.Component{
+									Tipo:     "STANDARD",
+									Elements: []goics.Componenter{},
+									Properties: map[string][]string{
+										"DTSTART":      {"19701025T030000"},
+										"RRULE":        {"FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU"},
+										"TZOFFSETFROM": {"+0200"},
+										"TZOFFSETTO":   {"+0100"},
+										"TZNAME":       {"CET"},
+									},
+								},
+							},
+							&HtwkalenderComponent{
+								Component: &goics.Component{
+									Tipo:     "DAYLIGHT",
+									Elements: []goics.Componenter{},
+									Properties: map[string][]string{
+										"DTSTART":      {"19700329T020000"},
+										"TZOFFSETFROM": {"+0100"},
+										"TZOFFSETTO":   {"+0200"},
+										"TZNAME":       {"CEST"},
+										"RRULE":        {"FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU"},
+									},
+								},
+							},
+						},
+						Properties: map[string][]string{
+							"TZID": {"EUROPE/BERLIN"},
+						},
+					},
+					&goics.Component{
+						Tipo:     "VEVENT",
+						Elements: []goics.Componenter{},
+						Properties: map[string][]string{
+							"DTSTAMP":     {"20231201T000000Z"},
+							"UID":         {"b52a7a081f46eeba9b402114493278a34a48b572c84e53d7ac4da9dea15cdff2@htwkalender.de"},
+							"DTEND":       {"20231201T010000Z"},
+							"DTSTART":     {"20231201T000000Z"},
+							"SUMMARY":     {"UserDefinedName"},
+							"DESCRIPTION": {"Profs: Test\nGruppen: Test\nTyp: Test\nNotizen: Test\n"},
+							"LOCATION":    {"ZU430"},
+						},
+					},
+					&goics.Component{
+						Tipo:     "VEVENT",
+						Elements: []goics.Componenter{},
+						Properties: map[string][]string{
+							"DTSTAMP":     {"20231201T000000Z"},
+							"UID":         {"5e946c0c4474bc6e6337262093e3ef31477e026bbc6bab398d755b002506d9d7@htwkalender.de"},
+							"DTEND":       {"20231201T010000Z"},
+							"DTSTART":     {"20231201T000000Z"},
+							"SUMMARY":     {"UserDefinedName"},
+							"DESCRIPTION": {"Profs: Test\nGruppen: Test\nTyp: Test\nNotizen: Test\n"},
+							"LOCATION":    {"ZU221"},
+						},
+					},
+				},
+				Properties: map[string][]string{
+					"PRODID":        {"-//HTWK Kalender//htwkalender.de//DE"},
+					"VERSION":       {"2.0"},
+					"CALSCALE":      {"GREGORIAN"},
+					"TZID":          {"EUROPE/BERLIN"},
+					"X-WR-CALNAME":  {"HTWK Kalender"},
+					"X-WR-TIMEZONE": {"EUROPE/BERLIN"},
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			icalModel := IcalModel{
+				Events:  tt.fields.Events,
+				Mapping: tt.fields.Mapping,
+			}
+
+			mockClock := mockTime.MockClock{
+				NowTime: time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC),
+			}
+
+			if got := generateIcalEmit(icalModel, mockClock); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("EmitICal() = \n%v, want \n%v", got, tt.want)
+
+				// Print the differences
+				for i, element := range got.Elements {
+					if !reflect.DeepEqual(element, tt.want.Elements[i]) {
+						t.Errorf("Element %d: got \n%v, want \n%v", i, element, tt.want.Elements[i])
+					}
+				}
+			}
+		})
+	}
+}

services/data-manager/service/ical/icsComponenter.go

@@ -0,0 +1,62 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package ical
+
+import (
+	"github.com/jordic/goics"
+	"sort"
+	"strings"
+)
+
+type HtwkalenderComponent struct {
+	*goics.Component
+}
+
+func NewHtwkalenderComponent() *HtwkalenderComponent {
+	return &HtwkalenderComponent{
+		Component: goics.NewComponent(),
+	}
+}
+
+// Writes the component to the Writer
+func (c *HtwkalenderComponent) Write(w *goics.ICalEncode) {
+	w.WriteLine("BEGIN:" + c.Tipo + goics.CRLF)
+
+	// Iterate over component properties
+	var keys []string
+	for k := range c.Properties {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	for _, key := range keys {
+		vals := c.Properties[key]
+		for _, val := range vals {
+			w.WriteLine(WriteStringField(key, val))
+		}
+	}
+
+	for _, xc := range c.Elements {
+		xc.Write(w)
+	}
+
+	w.WriteLine("END:" + c.Tipo + goics.CRLF)
+}
+
+// WriteStringField UID:asdfasdfаs@dfasdf.com
+func WriteStringField(key string, val string) string {
+	return strings.ToUpper(key) + ":" + (val) + goics.CRLF
+}

services/data-manager/service/names/userDefinedNameTemplates.go

@@ -0,0 +1,39 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package names
+
+import (
+	"htwkalender/model"
+	"regexp"
+)
+
+func ReplaceTemplateSubStrings(rawString string, event model.Event) string {
+	re := regexp.MustCompile(`\%(.)`)
+
+	return re.ReplaceAllStringFunc(rawString, func(match string) string {
+		switch match {
+		case "%%":
+			return "%"
+		case "%t":
+			return event.EventType
+		case "%p":
+			return event.Compulsory
+		default:
+			return match
+		}
+	})
+}

services/data-manager/service/names/userDefinedNameTemplates_test.go

@@ -0,0 +1,94 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package names
+
+import (
+	"htwkalender/model"
+	"testing"
+)
+
+func TestReplaceTemplateSubStrings(t *testing.T) {
+	type args struct {
+		rawString string
+		event     model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "Test 1",
+			args: args{
+				rawString: "%t",
+				event: model.Event{
+					EventType: "Test",
+				},
+			},
+			want: "Test",
+		},
+		{
+			name: "Test 2",
+			args: args{
+				rawString: "%p",
+				event: model.Event{
+					Compulsory: "Test",
+				},
+			},
+			want: "Test",
+		},
+		{
+			name: "Test 3",
+			args: args{
+				rawString: "%%",
+				event: model.Event{
+					EventType: "Test",
+				},
+			},
+			want: "%",
+		},
+		{
+			name: "Test 4",
+			args: args{
+				rawString: "%t %p",
+				event: model.Event{
+					EventType:  "Test",
+					Compulsory: "Test",
+				},
+			},
+			want: "Test Test",
+		},
+		{
+			name: "Test 5",
+			args: args{
+				rawString: "%t %p %%",
+				event: model.Event{
+					EventType:  "Test",
+					Compulsory: "Test",
+				},
+			},
+			want: "Test Test %",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := ReplaceTemplateSubStrings(tt.args.rawString, tt.args.event); got != tt.want {
+				t.Errorf("ReplaceTemplateSubStrings() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/room/roomService.go

@@ -0,0 +1,106 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package room
+
+import (
+	"github.com/pocketbase/pocketbase"
+	"htwkalender/model"
+	"htwkalender/service/db"
+	"htwkalender/service/functions"
+	"time"
+)
+
+func GetRooms(app *pocketbase.PocketBase) ([]string, error) {
+	rooms, err := db.GetRooms(app)
+	if err != nil {
+		return nil, err
+	} else {
+		return rooms, nil
+	}
+}
+
+func GetRoomScheduleForDay(app *pocketbase.PocketBase, room string, date string) ([]model.AnonymizedEventDTO, error) {
+	roomSchedule, err := db.GetRoomScheduleForDay(app, room, date)
+	if err != nil {
+		return nil, err
+	}
+	anonymizedRoomSchedule := anonymizeRooms(roomSchedule)
+	return anonymizedRoomSchedule, nil
+}
+
+func GetRoomSchedule(app *pocketbase.PocketBase, room string, from string, to string) ([]model.AnonymizedEventDTO, error) {
+	roomSchedule, err := db.GetRoomSchedule(app, room, from, to)
+	if err != nil {
+		return nil, err
+	}
+	anonymizedRoomSchedule := anonymizeRooms(roomSchedule)
+	return anonymizedRoomSchedule, nil
+}
+
+// Transform the events to anonymized events throwing away all unnecessary information
+func anonymizeRooms(events []model.Event) []model.AnonymizedEventDTO {
+	var anonymizedEvents []model.AnonymizedEventDTO
+	for _, event := range events {
+		anonymizedEvents = append(anonymizedEvents, event.AnonymizeEvent())
+	}
+	return anonymizedEvents
+}
+
+func GetFreeRooms(app *pocketbase.PocketBase, from time.Time, to time.Time) ([]string, error) {
+	rooms, err := db.GetRooms(app)
+	if err != nil {
+		return nil, err
+	}
+	var events model.Events
+	events, err = db.GetEventsThatCollideWithTimeRange(app, from, to)
+	if err != nil {
+		return nil, err
+	}
+	freeRooms := removeRoomsThatHaveEvents(rooms, events)
+	return freeRooms, nil
+}
+
+// Remove all rooms from the list that have events in the given time range
+func removeRoomsThatHaveEvents(rooms []string, schedule []model.Event) []string {
+	var freeRooms []string
+	for _, room := range rooms {
+		if !isRoomInSchedule(room, schedule) {
+			freeRooms = append(freeRooms, room)
+		}
+	}
+	return freeRooms
+}
+
+// Check if a room is in the schedule
+func isRoomInSchedule(room string, schedule []model.Event) bool {
+	for _, event := range schedule {
+		if event.Course != "Sport" {
+			rooms := functions.SeperateRoomString(event.Rooms)
+			// check if room is in rooms
+			for _, r := range rooms {
+				if r == room {
+					return true
+				}
+			}
+		} else {
+			if event.Rooms == room {
+				return true
+			}
+		}
+	}
+	return false
+}

services/data-manager/service/room/roomService_test.go

@@ -0,0 +1,351 @@
+//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
+//Copyright (C) 2024 HTWKalender support@htwkalender.de
+
+//This program is free software: you can redistribute it and/or modify
+//it under the terms of the GNU Affero General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+
+//This program is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU Affero General Public License for more details.
+
+//You should have received a copy of the GNU Affero General Public License
+//along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package room
+
+import (
+	"github.com/pocketbase/pocketbase/tools/types"
+	"htwkalender/model"
+	"reflect"
+	"testing"
+)
+
+func Test_anonymizeRooms(t *testing.T) {
+	type args struct {
+		events []model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want []model.AnonymizedEventDTO
+	}{
+		{
+			name: "anonymize single event",
+			args: args{
+				events: []model.Event{
+					{
+						UUID:       "testUUID",
+						Day:        "Montag",
+						Week:       "52",
+						Start:      types.DateTime{},
+						End:        types.DateTime{},
+						Name:       "Secret",
+						EventType:  "V",
+						Prof:       "Prof. Dr. Secret",
+						Rooms:      "Room",
+						Notes:      "Secret",
+						BookedAt:   "Secret",
+						Course:     "42INM-3",
+						Semester:   "ws",
+						Compulsory: "p",
+					},
+				},
+			},
+			want: []model.AnonymizedEventDTO{
+				{
+					Day:   "Montag",
+					Week:  "52",
+					Start: types.DateTime{},
+					End:   types.DateTime{},
+					Rooms: "Room",
+					Free:  false,
+				},
+			},
+		},
+		{
+			name: "anonymize empty list",
+			args: args{
+				events: []model.Event{},
+			},
+			want: nil,
+		},
+		{
+			name: "anonymize multiple events",
+			args: args{
+				events: []model.Event{
+					{
+						UUID:       "testUUID1",
+						Day:        "Montag",
+						Week:       "51",
+						Start:      types.DateTime{},
+						End:        types.DateTime{},
+						Name:       "Incognito",
+						EventType:  "V",
+						Prof:       "Prof. Dr. Incognito",
+						Rooms:      "Room",
+						Notes:      "Incognito",
+						BookedAt:   "Incognito",
+						Course:     "69INM-2",
+						Semester:   "sose",
+						Compulsory: "p",
+					},
+					{
+						UUID:       "testUUID2",
+						Day:        "Dienstag",
+						Week:       "52",
+						Start:      types.DateTime{},
+						End:        types.DateTime{},
+						Name:       "Private",
+						EventType:  "S",
+						Prof:       "Prof.In. Dr.-Ing. Private",
+						Rooms:      "Room",
+						Notes:      "Private",
+						BookedAt:   "Private",
+						Course:     "42MIM-3",
+						Semester:   "ws",
+						Compulsory: "w",
+					},
+				},
+			},
+			want: []model.AnonymizedEventDTO{
+				{
+					Day:   "Montag",
+					Week:  "51",
+					Start: types.DateTime{},
+					End:   types.DateTime{},
+					Rooms: "Room",
+					Free:  false,
+				},
+				{
+					Day:   "Dienstag",
+					Week:  "52",
+					Start: types.DateTime{},
+					End:   types.DateTime{},
+					Rooms: "Room",
+					Free:  false,
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := anonymizeRooms(tt.args.events); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("anonymizeRooms() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_isRoomInSchedule(t *testing.T) {
+	type args struct {
+		room     string
+		schedule []model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "room is in schedule",
+			args: args{
+				room: "Room",
+				schedule: []model.Event{
+					{
+						UUID:      "testUUID",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Secret",
+						EventType: "V",
+						Prof:      "Prof. Dr. Secret",
+						Rooms:     "Room",
+						Notes:     "Secret",
+					},
+				},
+			},
+			want: true,
+		},
+		{
+			name: "room is not in schedule",
+			args: args{
+				room: "Z324",
+				schedule: []model.Event{
+					{
+						UUID:      "testUUID",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Secret",
+						EventType: "V",
+						Prof:      "Prof. Dr. Bond",
+						Rooms:     "LI007",
+						Notes:     "Keine Zeit für die Uni",
+					},
+				},
+			},
+			want: false,
+		},
+		{
+			name: "schedule event.Course is sport",
+			args: args{
+				room: "Klettergerüst",
+				schedule: []model.Event{
+					{
+						UUID:      "903784265784639527",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Hampelmann",
+						EventType: "S",
+						Prof:      "Prof. Dr. Bewegung",
+						Rooms:     "Klettergerüst",
+						Notes:     "A apple a day keeps the doctor away",
+						Course:    "Sport",
+					},
+				},
+			},
+			want: true,
+		},
+		{
+			name: "schedule event.Course is sport with different room",
+			args: args{
+				room: "HTWK Sportplatz",
+				schedule: []model.Event{
+					{
+						UUID:      "903784265784639527",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Hampelmann",
+						EventType: "S",
+						Prof:      "Prof. Dr. Bewegung",
+						Rooms:     "Klettergerüst",
+						Notes:     "A apple a day keeps the doctor away",
+						Course:    "Sport",
+					},
+				},
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isRoomInSchedule(tt.args.room, tt.args.schedule); got != tt.want {
+				t.Errorf("isRoomInSchedule() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_getFreeRooms(t *testing.T) {
+	type args struct {
+		rooms    []string
+		schedule []model.Event
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{
+			name: "remove room1 from list",
+			args: args{
+				rooms: []string{
+					"Room1",
+					"Room2",
+					"Room3",
+				},
+				schedule: []model.Event{
+					{
+						UUID:      "testUUID",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Secret",
+						EventType: "V",
+						Prof:      "Prof. Dr. Secret",
+						Rooms:     "Room1",
+						Notes:     "Secret",
+					},
+				},
+			},
+			want: []string{
+				"Room2",
+				"Room3",
+			},
+		},
+		{
+			name: "remove room2 from list",
+			args: args{
+				rooms: []string{
+					"Room1",
+					"Room2",
+					"Room3",
+				},
+				schedule: []model.Event{
+					{
+						UUID:      "testUUID",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Secret",
+						EventType: "V",
+						Prof:      "Prof. Dr. Secret",
+						Rooms:     "Room3",
+						Notes:     "Secret",
+					},
+				},
+			},
+			want: []string{
+				"Room1",
+				"Room2",
+			},
+		},
+		{
+			name: "remove no room from list",
+			args: args{
+				rooms: []string{
+					"Room1",
+					"Room2",
+					"Room3",
+				},
+				schedule: []model.Event{
+					{
+						UUID:      "testUUID",
+						Day:       "Montag",
+						Week:      "52",
+						Start:     types.DateTime{},
+						End:       types.DateTime{},
+						Name:      "Secret",
+						EventType: "V",
+						Prof:      "Prof. Dr. Secret",
+						Rooms:     "Room4",
+						Notes:     "Secret",
+					},
+				},
+			},
+			want: []string{
+				"Room1",
+				"Room2",
+				"Room3",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := removeRoomsThatHaveEvents(tt.args.rooms, tt.args.schedule); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("removeRoomsThatHaveEvents() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}