feat: emoji update event

Catalogger.Backend/Cache/InMemoryCache/EmojiCache.cs

@@ -0,0 +1,33 @@
+// Copyright (C) 2021-present sam (starshines.gay)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using System.Collections.Concurrent;
+using System.Diagnostics.CodeAnalysis;
+using Remora.Discord.API.Abstractions.Objects;
+using Remora.Rest.Core;
+
+namespace Catalogger.Backend.Cache.InMemoryCache;
+
+public class EmojiCache
+{
+    private readonly ConcurrentDictionary<Snowflake, IReadOnlyList<IEmoji>> _emojis = new();
+
+    public void Set(Snowflake guildId, IReadOnlyList<IEmoji> emoji) => _emojis[guildId] = emoji;
+
+    public bool TryGet(Snowflake guildId, [NotNullWhen(true)] out IReadOnlyList<IEmoji>? emoji) =>
+        _emojis.TryGetValue(guildId, out emoji);
+
+    public int Size => _emojis.Select(kv => kv.Value.Count).Sum();
+}