Re-organize all projects (#4166)

Content.Shared/CharacterAppearance/SpriteAccessoryManager.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using Robust.Shared.IoC;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.CharacterAppearance
+{
+    public sealed class SpriteAccessoryManager
+    {
+        [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+
+        private readonly Dictionary<SpriteAccessoryCategories, List<SpriteAccessoryPrototype>> _index = new();
+
+        public void Initialize()
+        {
+            _prototypeManager.PrototypesReloaded += OnPrototypesReloaded;
+
+            foreach (var category in Enum.GetValues<SpriteAccessoryCategories>())
+            {
+                _index.Add(category, new List<SpriteAccessoryPrototype>());
+            }
+
+            foreach (var prototype in _prototypeManager.EnumeratePrototypes<SpriteAccessoryPrototype>())
+            {
+                AddToIndexes(prototype);
+            }
+        }
+
+        public IReadOnlyList<SpriteAccessoryPrototype> AccessoriesForCategory(SpriteAccessoryCategories categories)
+        {
+            return _index[categories];
+        }
+
+        public bool IsValidAccessoryInCategory(string accessory, SpriteAccessoryCategories categories)
+        {
+            return _prototypeManager.TryIndex(accessory, out SpriteAccessoryPrototype? accessoryPrototype)
+                   && (accessoryPrototype.Categories & categories) != 0;
+        }
+
+        private void OnPrototypesReloaded(PrototypesReloadedEventArgs eventArgs)
+        {
+            if (!eventArgs.ByType.TryGetValue(typeof(SpriteAccessoryPrototype), out var set))
+                return;
+
+            foreach (var list in _index.Values)
+            {
+                list.RemoveAll(a => set.Modified.ContainsKey(a.ID));
+            }
+
+            foreach (var prototype in set.Modified.Values)
+            {
+                var accessoryPrototype = (SpriteAccessoryPrototype) prototype;
+                AddToIndexes(accessoryPrototype);
+            }
+        }
+
+        private void AddToIndexes(SpriteAccessoryPrototype accessoryPrototype)
+        {
+            for (var i = 0; i < sizeof(SpriteAccessoryCategories) * 8; i++)
+            {
+                var flag = (SpriteAccessoryCategories) (1 << i);
+                if ((accessoryPrototype.Categories & flag) != 0)
+                    _index[flag].Add(accessoryPrototype);
+            }
+        }
+    }
+}