Untis API Integration
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using System.Collections.ObjectModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using LehrerApp.Core.Interfaces;
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using LehrerApp.Core.Models;
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using LehrerApp.Desktop.Services;
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namespace LehrerApp.Desktop.ViewModels.Planning;
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public sealed record WebUntisGroupOption(Guid Id, string DisplayName);
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public partial class WebUntisTimetableRow : ObservableObject
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{
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public required DayOfWeek Weekday { get; init; }
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public required int PeriodNumber { get; init; }
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public required string TimeLabel { get; init; }
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public required string UntisLabel { get; init; }
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public required string SuggestedGroupName { get; init; }
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public string? SubjectName { get; init; }
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public string? Room { get; init; }
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public ObservableCollection<WebUntisGroupOption> GroupOptions { get; } = [];
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[ObservableProperty] private WebUntisGroupOption? _selectedGroup;
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public string WeekdayLabel => Weekday switch
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{
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DayOfWeek.Monday => "Mo", DayOfWeek.Tuesday => "Di", DayOfWeek.Wednesday => "Mi",
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DayOfWeek.Thursday => "Do", DayOfWeek.Friday => "Fr", _ => Weekday.ToString()[..2],
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};
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}
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public partial class WebUntisTimetableImportViewModel : ObservableObject
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{
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private readonly WebUntisIntegrationService _untis;
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private readonly WebUntisSettingsService _settings;
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private readonly ITimetableSlotRepository _slots;
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private readonly IGroupRepository _groups;
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public ObservableCollection<UntisTeacherDto> Teachers { get; } = [];
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public ObservableCollection<WebUntisTimetableRow> Rows { get; } = [];
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[ObservableProperty] private UntisTeacherDto? _selectedTeacher;
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[ObservableProperty] private DateTimeOffset _weekDate = DateTimeOffset.Now;
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[ObservableProperty] private string _status = "Lehrkraft auswählen und Untis-Woche laden.";
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[ObservableProperty] private bool _busy;
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public bool Saved { get; private set; }
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public Func<WebUntisTimetableRow, Task<LearningGroup?>>? OnCreateGroup { get; set; }
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public WebUntisTimetableImportViewModel(WebUntisIntegrationService untis, WebUntisSettingsService settings,
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ITimetableSlotRepository slots, IGroupRepository groups)
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{
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_untis = untis; _settings = settings; _slots = slots; _groups = groups;
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}
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public async Task InitializeAsync()
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{
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Busy = true;
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try
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{
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foreach (var teacher in (await _untis.GetTeachersAsync()).Where(x => x.Active).OrderBy(x => x.DisplayName))
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Teachers.Add(teacher);
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SelectedTeacher = Teachers.FirstOrDefault(x => x.UntisId == _settings.TeacherUntisId)
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?? Teachers.FirstOrDefault();
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Status = Teachers.Count == 0 ? "WebUntis hat keine Lehrkräfte geliefert." : "Bereit zum Laden.";
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}
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catch (WebUntisIntegrationException ex) { Status = ex.Message; }
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finally { Busy = false; }
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}
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[RelayCommand]
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private async Task Load()
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{
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if (SelectedTeacher is null) { Status = "Bitte eine Lehrkraft auswählen."; return; }
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Busy = true; Rows.Clear();
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try
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{
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var selected = DateOnly.FromDateTime(WeekDate.LocalDateTime);
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var monday = selected.AddDays(-(((int)selected.DayOfWeek + 6) % 7));
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var periods = await _untis.GetTimetableAsync(SelectedTeacher.UntisId, monday, monday.AddDays(6));
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var grid = await _untis.GetTimeGridAsync();
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var groupOptions = BuildGroupOptions();
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var localSlots = _slots.GetAll().ToDictionary(x => (x.Weekday, x.PeriodNumber));
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foreach (var period in periods.Where(x => string.IsNullOrWhiteSpace(x.Code) || x.Code != "cancelled")
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.GroupBy(x => (x.Date, x.StartTime, x.EndTime, x.StudentGroup,
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Class: string.Join("/", x.Classes.Select(c => c.Name)),
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Subject: string.Join("/", x.Subjects.Select(s => s.Name)),
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Room: string.Join("/", x.Rooms.Select(r => r.Name))))
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.Select(x => x.First()).OrderBy(x => x.Date).ThenBy(x => x.StartTime))
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{
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if (!TryDate(period.Date, out var date) || date.DayOfWeek is DayOfWeek.Saturday or DayOfWeek.Sunday)
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continue;
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var dayGrid = grid.FirstOrDefault(x => x.Day == UntisDay(date.DayOfWeek));
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var number = dayGrid?.TimeUnits.ToList().FindIndex(x => x.StartTime == period.StartTime) + 1 ?? 0;
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if (number <= 0) continue;
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var className = period.Classes.FirstOrDefault()?.Name ?? "";
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var subject = period.Subjects.FirstOrDefault()?.Name;
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var suggested = !string.IsNullOrWhiteSpace(period.StudentGroup) ? period.StudentGroup! : className;
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var row = new WebUntisTimetableRow
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{
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Weekday = date.DayOfWeek, PeriodNumber = number,
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TimeLabel = $"{Time(period.StartTime)}–{Time(period.EndTime)}",
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UntisLabel = string.Join(" · ", new[] { subject, suggested, period.Rooms.FirstOrDefault()?.Name }
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.Where(x => !string.IsNullOrWhiteSpace(x))),
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SuggestedGroupName = suggested, SubjectName = subject,
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Room = period.Rooms.FirstOrDefault()?.Name,
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};
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foreach (var option in groupOptions) row.GroupOptions.Add(option);
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if (localSlots.TryGetValue((row.Weekday, row.PeriodNumber), out var existing))
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row.SelectedGroup = groupOptions.FirstOrDefault(x => x.Id == existing.GroupId);
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row.SelectedGroup ??= BestMatch(groupOptions, suggested, className, subject);
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Rows.Add(row);
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}
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_settings.SetTeacherUntisId(SelectedTeacher.UntisId);
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Status = Rows.Count == 0 ? "In dieser Woche wurde kein Unterricht gefunden."
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: $"{Rows.Count} regelmäßige Termine gefunden. Zuordnung prüfen und übernehmen.";
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}
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catch (WebUntisIntegrationException ex) { Status = ex.Message; }
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finally { Busy = false; }
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}
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[RelayCommand]
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private async Task CreateGroup(WebUntisTimetableRow row)
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{
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if (OnCreateGroup is null) return;
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var group = await OnCreateGroup(row);
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if (group is null) return;
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var option = new WebUntisGroupOption(group.Id, group.Name);
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foreach (var item in Rows.Where(x => x.SuggestedGroupName == row.SuggestedGroupName))
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{
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item.GroupOptions.Add(option);
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item.SelectedGroup = option;
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}
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}
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[RelayCommand]
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private void Save()
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{
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var selected = Rows.Where(x => x.SelectedGroup is not null).ToList();
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foreach (var row in selected)
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{
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var existing = _slots.GetAll().FirstOrDefault(x => x.Weekday == row.Weekday && x.PeriodNumber == row.PeriodNumber);
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var slot = existing ?? new TimetableSlot { Weekday = row.Weekday, PeriodNumber = row.PeriodNumber };
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slot.GroupId = row.SelectedGroup!.Id;
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slot.Room = string.IsNullOrWhiteSpace(row.Room) ? null : row.Room;
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_slots.Save(slot);
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}
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Saved = true;
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Status = $"{selected.Count} Stundenplan-Einträge übernommen.";
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}
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private List<WebUntisGroupOption> BuildGroupOptions() => _groups.GetAll().OrderBy(x => x.Name)
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.Select(x => new WebUntisGroupOption(x.Id, x.Name)).ToList();
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private static WebUntisGroupOption? BestMatch(IEnumerable<WebUntisGroupOption> options, params string?[] terms) =>
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options.FirstOrDefault(x => terms.Any(term => !string.IsNullOrWhiteSpace(term) &&
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(x.DisplayName.Equals(term, StringComparison.OrdinalIgnoreCase) ||
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x.DisplayName.Contains(term, StringComparison.OrdinalIgnoreCase))));
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private static int UntisDay(DayOfWeek day) => day == DayOfWeek.Sunday ? 7 : (int)day;
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private static bool TryDate(int value, out DateOnly date) => DateOnly.TryParseExact(value.ToString(), "yyyyMMdd", out date);
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private static string Time(int value) => $"{value / 100:00}:{value % 100:00}";
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}
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