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LehrerApp/LehrerApp.Desktop/ViewModels/DashboardViewModel.cs
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2026-06-19 00:42:00 +02:00

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using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using LehrerApp.Core.Interfaces;
using LehrerApp.Core.Models;
using LehrerApp.Core.Services;
using System.Collections.ObjectModel;
using System.Globalization;
namespace LehrerApp.Desktop.ViewModels;
public partial class DashboardViewModel : ObservableObject
{
private readonly IGroupRepository _groups;
private readonly ILessonRepository _lessons;
private readonly IWorkTaskRepository _tasks;
private readonly SchoolYearService _sy;
[ObservableProperty] private string _greeting = "";
[ObservableProperty] private string _currentDate = "";
[ObservableProperty] private string _currentSchoolYear = "";
public ObservableCollection<LessonItem> TodaysLessons { get; } = [];
public ObservableCollection<TaskItem> OpenTasks { get; } = [];
public ObservableCollection<GroupChip> CurrentGroups { get; } = [];
// Navigation-Callback wird von App.axaml.cs verdrahtet
public Action<Guid>? OnNavigateToGroup { get; set; }
public DashboardViewModel(IGroupRepository groups, ILessonRepository lessons,
IWorkTaskRepository tasks, SchoolYearService sy)
{
_groups = groups; _lessons = lessons; _tasks = tasks; _sy = sy;
Load();
}
private void Load()
{
var now = DateTime.Now;
var today = DateOnly.FromDateTime(now);
CurrentDate = now.ToString("dddd, d. MMMM yyyy", new CultureInfo("de-DE"));
CurrentSchoolYear = _sy.CurrentSchoolYear();
Greeting = now.Hour < 12 ? "Guten Morgen" : now.Hour < 18 ? "Guten Tag" : "Guten Abend";
TodaysLessons.Clear();
var groups = _groups.GetBySchoolYear(_sy.CurrentSchoolYear()).ToDictionary(g => g.Id);
foreach (var l in groups.Keys.SelectMany(gid => _lessons.GetByGroupAndDate(gid, today))
.OrderBy(l => l.LessonNumber))
{
if (groups.TryGetValue(l.GroupId, out var g))
TodaysLessons.Add(new() { GroupName = g.Name, Topic = l.Topic });
}
OpenTasks.Clear();
foreach (var t in _tasks.GetByStatus(WorkTaskStatus.Open)
.Concat(_tasks.GetByStatus(WorkTaskStatus.InProgress))
.OrderBy(t => t.DueDate ?? DateOnly.MaxValue).Take(5))
OpenTasks.Add(new() { Title = t.Title,
DueDate = t.DueDate?.ToString("dd.MM.") ?? "",
IsOverdue = t.DueDate.HasValue && t.DueDate < today });
CurrentGroups.Clear();
foreach (var g in groups.Values.OrderBy(g => g.Name))
CurrentGroups.Add(new() { GroupId = g.Id, Name = g.Name, Subject = g.Subject ?? "" });
}
[RelayCommand] private void OpenGroup(GroupChip? c) { if (c is not null) OnNavigateToGroup?.Invoke(c.GroupId); }
[RelayCommand] private void Refresh() => Load();
}
public class LessonItem { public string GroupName { get; set; } = ""; public string Topic { get; set; } = ""; }
public class TaskItem { public string Title { get; set; } = ""; public string DueDate { get; set; } = ""; public bool IsOverdue { get; set; } }
public class GroupChip { public Guid GroupId { get; set; } public string Name { get; set; } = ""; public string Subject { get; set; } = ""; }