Migrate UsernameSaver to new Plugin structure

backend/src/plugins/UsernameSaver/UsernameSaverPlugin.ts

@@ -0,0 +1,21 @@
+import { zeppelinPlugin } from "../ZeppelinPluginBlueprint";
+import { UsernameHistory } from "src/data/UsernameHistory";
+import { Queue } from "src/Queue";
+import { UsernameSaverPluginType } from "./types";
+import { MessageCreateEvt } from "./events/MessageCreateEvt";
+import { VoiceChannelJoinEvt } from "./events/VoiceChannelJoinEvt";
+
+export const UsernameSaverPlugin = zeppelinPlugin<UsernameSaverPluginType>()("username_saver", {
+  // prettier-ignore
+  events: [
+    MessageCreateEvt,
+    VoiceChannelJoinEvt,
+  ],
+
+  onLoad(pluginData) {
+    const { state, guild } = pluginData;
+
+    state.usernameHistory = new UsernameHistory();
+    state.updateQueue = new Queue();
+  },
+});