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

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)
+}