Add favorite option to items.

Glamourer/Unlocks/FavoriteManager.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Dalamud.Interface.Internal.Notifications;
+using Glamourer.Services;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using OtterGui.Classes;
+using Penumbra.GameData.Structs;
+
+namespace Glamourer.Unlocks;
+
+public class FavoriteManager : ISavable
+{
+    private readonly SaveService     _saveService;
+    private readonly HashSet<ItemId> _favorites = new();
+
+    public FavoriteManager(SaveService saveService)
+    {
+        _saveService = saveService;
+        Load();
+    }
+
+    private void Load()
+    {
+        var file = _saveService.FileNames.FavoriteFile;
+        if (!File.Exists(file))
+            return;
+
+        try
+        {
+            var text  = File.ReadAllText(file);
+            var array = JsonConvert.DeserializeObject<uint[]>(text) ?? Array.Empty<uint>();
+            _favorites.UnionWith(array.Select(i => (ItemId)i));
+        }
+        catch (Exception ex)
+        {
+            Glamourer.Messager.NotificationMessage(ex, "Could not read Favorite file.", NotificationType.Error);
+        }
+    }
+
+    public string ToFilename(FilenameService fileNames)
+        => fileNames.FavoriteFile;
+
+    private void Save()
+        => _saveService.DelaySave(this);
+
+    public void Save(StreamWriter writer)
+    {
+        using var j = new JsonTextWriter(writer)
+        {
+            Formatting = Formatting.Indented,
+        };
+        j.WriteStartArray();
+        foreach (var item in _favorites)
+            j.WriteValue(item.Id);
+        j.WriteEndArray();
+    }
+
+    public bool TryAdd(EquipItem item)
+        => TryAdd(item.ItemId);
+
+    public bool TryAdd(ItemId item)
+    {
+        if (item.Id == 0 || !_favorites.Add(item))
+            return false;
+
+        Save();
+        return true;
+    }
+
+    public bool Remove(EquipItem item)
+        => Remove(item.ItemId);
+
+    public bool Remove(ItemId item)
+    {
+        if (!_favorites.Remove(item))
+            return false;
+
+        Save();
+        return true;
+    }
+
+    public IEnumerator<ItemId> GetEnumerator()
+        => _favorites.GetEnumerator();
+
+    public int Count
+        => _favorites.Count;
+
+    public bool Contains(EquipItem item)
+        => _favorites.Contains(item.ItemId);
+
+    public bool Contains(ItemId item)
+        => _favorites.Contains(item);
+}