Initial commit

Jugenddienst Stunden/ViewModels/NoteViewModel.cs

@@ -0,0 +1,65 @@
+using CommunityToolkit.Mvvm.Input;
+using CommunityToolkit.Mvvm.ComponentModel;
+using System.Windows.Input;
+
+namespace Jugenddienst_Stunden.ViewModels {
+	internal class NoteViewModel : ObservableObject, IQueryAttributable {
+		private Models.Note _note;
+		public string Text {
+			get => _note.Text;
+			set {
+				if (_note.Text != value) {
+					_note.Text = value;
+					OnPropertyChanged();
+				}
+			}
+		}
+
+		public DateTime Date => _note.Date;
+
+		public string Identifier => _note.Filename;
+
+		public ICommand SaveCommand { get; private set; }
+		public ICommand DeleteCommand { get; private set; }
+
+		public NoteViewModel() {
+			_note = new Models.Note();
+			SaveCommand = new AsyncRelayCommand(Save);
+			DeleteCommand = new AsyncRelayCommand(Delete);
+		}
+
+		public NoteViewModel(Models.Note note) {
+			_note = note;
+			SaveCommand = new AsyncRelayCommand(Save);
+			DeleteCommand = new AsyncRelayCommand(Delete);
+		}
+
+		private async Task Save() {
+			_note.Date = DateTime.Now;
+			_note.Save();
+			await Shell.Current.GoToAsync($"..?saved={_note.Filename}");
+		}
+
+		private async Task Delete() {
+			_note.Delete();
+			await Shell.Current.GoToAsync($"..?deleted={_note.Filename}");
+		}
+
+		void IQueryAttributable.ApplyQueryAttributes(IDictionary<string, object> query) {
+			if (query.ContainsKey("load")) {
+				_note = Models.Note.Load(query["load"].ToString());
+				RefreshProperties();
+			}
+		}
+
+		public void Reload() {
+			_note = Models.Note.Load(_note.Filename);
+			RefreshProperties();
+		}
+
+		private void RefreshProperties() {
+			OnPropertyChanged(nameof(Text));
+			OnPropertyChanged(nameof(Date));
+		}
+	}
+}