Notes

app/InkForge.Desktop/Models/NoteStore.cs

@@ -0,0 +1,88 @@
+using System.Collections.ObjectModel;
+using System.Reactive.Linq;
+
+using DynamicData;
+
+using InkForge.Data;
+
+using Microsoft.EntityFrameworkCore;
+
+namespace InkForge.Desktop.Models;
+
+public class NoteStore
+{
+	private readonly IDbContextFactory<NoteDbContext> _dbContextFactory;
+	private readonly SourceCache<Note, int> _notesCache = new(m => m.Id);
+
+	public ReadOnlyObservableCollection<Note> Notes { get; }
+
+	public NoteStore(IDbContextFactory<NoteDbContext> dbContextFactory)
+	{
+		_dbContextFactory = dbContextFactory;
+	}
+
+	public void AddNote(Note note)
+	{
+		using var dbContext = _dbContextFactory.CreateDbContext();
+		var entity = ToEntity(note);
+		var entry = dbContext.Notes.Add(entity);
+		
+		dbContext.SaveChanges();
+	}
+
+	public Note CreateNote() => new(this);
+
+	public Note? GetById(int id)
+	{
+		if (((Note?)_notesCache.Lookup(id)) is not Note note)
+		{
+			using var dbContext = _dbContextFactory.CreateDbContext();
+			if (dbContext.Notes.Find(id) is not { } dbNote)
+			{
+				return null;
+			}
+
+			note = ToNote(dbNote);
+		}
+
+		return note;
+	}
+
+	public IObservable<Note?> Watch(int id)
+	{
+		return _notesCache.WatchValue(id);
+	}
+
+	private NoteEntity ToEntity(Note note)
+	{
+		return new()
+		{
+			Id = note.Id,
+			Value = new()
+			{
+				Name = note.Name,
+				Created = note.CreatedTime,
+				Updated = note.UpdatedTime,
+			},
+			Parent = note.Parent switch
+			{
+				{ Id: { } parentId } => new()
+				{
+					Id = parentId
+				},
+				_ => null,
+			}
+		};
+	}
+
+	private Note ToNote(NoteEntity entity)
+	{
+		var note = CreateNote();
+		note.Id = entity.Id;
+		note.Name = entity.Value.Name;
+		note.CreatedTime = entity.Value.Created;
+		note.UpdatedTime = entity.Value.Updated;
+		note.ParentId = entity.Parent?.Id;
+		return note;
+	}
+}