UX-Update 2.0, Neues Dashboard
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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 System.Collections.ObjectModel;
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namespace LehrerApp.Desktop.ViewModels;
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/// <summary>
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/// Globale Suche und Schnellerfassung (14.2). Die Projektion bleibt bewusst klein und lokal:
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/// durchsucht werden die wichtigsten täglichen Ziele, ohne dafür einen zusätzlichen Suchindex
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/// oder eine Netzwerkabhängigkeit einzuführen.
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/// </summary>
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public partial class GlobalSearchViewModel : ObservableObject
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{
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private const int MaxDataResults = 12;
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private readonly IStudentRepository _students;
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private readonly IGroupRepository _groups;
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private readonly IExamRepository _exams;
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private readonly IWorkTaskRepository _tasks;
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[ObservableProperty] private string _query = "";
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[ObservableProperty] private GlobalSearchResult? _selectedResult;
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public ObservableCollection<GlobalSearchResult> Results { get; } = [];
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public bool HasResults => Results.Count > 0;
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public bool ShowNoResults => !string.IsNullOrWhiteSpace(Query) && Results.Count == 0;
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public Action<GlobalSearchResult>? OnNavigate { get; set; }
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public Func<bool, Task>? OnQuickAddTask { get; set; }
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public Func<Task>? OnQuickAddStudent { get; set; }
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public Action? OnClose { get; set; }
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public GlobalSearchViewModel(IStudentRepository students, IGroupRepository groups,
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IExamRepository exams, IWorkTaskRepository tasks)
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{
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_students = students;
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_groups = groups;
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_exams = exams;
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_tasks = tasks;
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RefreshResults();
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}
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partial void OnQueryChanged(string value) => RefreshResults();
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public void Reset()
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{
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Query = "";
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RefreshResults();
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}
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private void RefreshResults()
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{
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Results.Clear();
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var query = Query.Trim();
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AddQuickActions(query);
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if (query.Length > 0)
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{
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var groups = _groups.GetAll(includeInactive: true);
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var groupNames = groups.ToDictionary(g => g.Id, g => g.Name);
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var candidates = new List<GlobalSearchResult>();
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candidates.AddRange(_students.GetAll(includeInactive: true)
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.Where(s => Matches(s.FullName, query))
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.Select(s => GlobalSearchResult.ForStudent(s)));
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candidates.AddRange(groups
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.Where(g => Matches($"{g.Name} {g.SchoolYear} {g.GradeLevel}", query))
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.Select(GlobalSearchResult.ForGroup));
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candidates.AddRange(_exams.GetAll()
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.Where(e => Matches($"{e.Title} {groupNames.GetValueOrDefault(e.GroupId)}", query))
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.Select(e => GlobalSearchResult.ForExam(e, groupNames.GetValueOrDefault(e.GroupId) ?? "")));
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candidates.AddRange(_tasks.GetAll()
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.Where(t => Matches($"{t.Title} {t.Notes} {groupNames.GetValueOrDefault(t.GroupId ?? Guid.Empty)}", query))
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.Select(t => GlobalSearchResult.ForTask(t, groupNames.GetValueOrDefault(t.GroupId ?? Guid.Empty) ?? "")));
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foreach (var item in candidates
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.OrderByDescending(x => x.Title.StartsWith(query, StringComparison.CurrentCultureIgnoreCase))
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.ThenBy(x => x.KindSortOrder)
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.ThenBy(x => x.Title)
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.Take(MaxDataResults))
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Results.Add(item);
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}
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SelectedResult = Results.FirstOrDefault();
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OnPropertyChanged(nameof(HasResults));
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OnPropertyChanged(nameof(ShowNoResults));
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}
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private void AddQuickActions(string query)
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{
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var actions = new[]
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{
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GlobalSearchResult.ForAction(GlobalSearchAction.NewTask, "Aufgabe anlegen", "Mit Fälligkeit, Gruppe und Priorität", "＋"),
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GlobalSearchResult.ForAction(GlobalSearchAction.NewReminder, "Erinnerung anlegen", "Kurze Notiz ohne Zeiterfassung", "◷"),
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GlobalSearchResult.ForAction(GlobalSearchAction.NewStudent, "Schüler anlegen", "Neue Stammdaten erfassen", "＋"),
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};
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foreach (var action in actions.Where(a => query.Length == 0 || Matches(a.Title, query)))
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Results.Add(action);
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}
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private static bool Matches(string? value, string query) =>
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value?.Contains(query, StringComparison.CurrentCultureIgnoreCase) == true;
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[RelayCommand]
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private async Task Execute(GlobalSearchResult? result)
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{
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if (result is null) return;
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switch (result.Action)
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{
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case GlobalSearchAction.NewTask:
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if (OnQuickAddTask is not null) await OnQuickAddTask(false);
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break;
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case GlobalSearchAction.NewReminder:
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if (OnQuickAddTask is not null) await OnQuickAddTask(true);
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break;
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case GlobalSearchAction.NewStudent:
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if (OnQuickAddStudent is not null) await OnQuickAddStudent();
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break;
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default:
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OnNavigate?.Invoke(result);
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break;
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}
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OnClose?.Invoke();
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}
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}
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public enum GlobalSearchResultKind { Action, Student, Group, Exam, Task }
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public enum GlobalSearchAction { None, NewTask, NewReminder, NewStudent }
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public sealed class GlobalSearchResult
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{
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public GlobalSearchResultKind Kind { get; private init; }
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public GlobalSearchAction Action { get; private init; }
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public Guid? EntityId { get; private init; }
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public Guid? GroupId { get; private init; }
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public string Title { get; private init; } = "";
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public string Subtitle { get; private init; } = "";
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public string Icon { get; private init; } = "";
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public int KindSortOrder => Kind switch
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{
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GlobalSearchResultKind.Student => 0,
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GlobalSearchResultKind.Group => 1,
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GlobalSearchResultKind.Exam => 2,
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GlobalSearchResultKind.Task => 3,
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_ => -1,
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};
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public string KindLabel => Kind switch
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{
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GlobalSearchResultKind.Student => "Schüler",
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GlobalSearchResultKind.Group => "Lerngruppe",
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GlobalSearchResultKind.Exam => "Klausur",
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GlobalSearchResultKind.Task => "Aufgabe",
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_ => "Schnellaktion",
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};
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public static GlobalSearchResult ForAction(GlobalSearchAction action, string title, string subtitle, string icon) =>
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new() { Kind = GlobalSearchResultKind.Action, Action = action, Title = title, Subtitle = subtitle, Icon = icon };
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public static GlobalSearchResult ForStudent(Student student) => new()
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{
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Kind = GlobalSearchResultKind.Student, EntityId = student.Id,
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Title = student.FullName, Subtitle = student.IsActive ? "Aktiv" : "Inaktiv", Icon = "P",
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};
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public static GlobalSearchResult ForGroup(LearningGroup group) => new()
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{
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Kind = GlobalSearchResultKind.Group, EntityId = group.Id, GroupId = group.Id,
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Title = group.Name, Subtitle = $"{group.SchoolYear} · Stufe {group.GradeLevel}", Icon = "G",
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};
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public static GlobalSearchResult ForExam(Exam exam, string groupName) => new()
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{
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Kind = GlobalSearchResultKind.Exam, EntityId = exam.Id, GroupId = exam.GroupId,
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Title = exam.Title, Subtitle = $"{groupName} · {exam.Date:dd.MM.yyyy}", Icon = "K",
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};
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public static GlobalSearchResult ForTask(WorkTask task, string groupName) => new()
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{
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Kind = GlobalSearchResultKind.Task, EntityId = task.Id, GroupId = task.GroupId,
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Title = task.Title,
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Subtitle = string.Join(" · ", new[] { groupName, task.DueDate?.ToString("dd.MM.yyyy") ?? "" }
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.Where(x => !string.IsNullOrWhiteSpace(x))),
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Icon = task.Kind == TaskKind.Reminder ? "E" : "A",
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};
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}
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