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

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
+}