Reorganize project. Add folder for shared code between backend/dashboard. Switch from jest to ava for tests.

backend/src/data/GuildLogs.ts

@@ -0,0 +1,55 @@
+import EventEmitter from "events";
+import { LogType } from "./LogType";
+
+// Use the same instance for the same guild, even if a new instance is created
+const guildInstances: Map<string, GuildLogs> = new Map();
+
+interface IIgnoredLog {
+  type: LogType;
+  ignoreId: any;
+}
+
+export class GuildLogs extends EventEmitter {
+  protected guildId: string;
+  protected ignoredLogs: IIgnoredLog[];
+
+  constructor(guildId) {
+    if (guildInstances.has(guildId)) {
+      // Return existing instance for this guild if one exists
+      return guildInstances.get(guildId);
+    }
+
+    super();
+    this.guildId = guildId;
+    this.ignoredLogs = [];
+
+    // Store the instance for this guild so it can be returned later if a new instance for this guild is requested
+    guildInstances.set(guildId, this);
+  }
+
+  log(type: LogType, data: any, ignoreId = null) {
+    if (ignoreId && this.isLogIgnored(type, ignoreId)) {
+      this.clearIgnoredLog(type, ignoreId);
+      return;
+    }
+
+    this.emit("log", { type, data });
+  }
+
+  ignoreLog(type: LogType, ignoreId: any, timeout: number = null) {
+    this.ignoredLogs.push({ type, ignoreId });
+
+    // Clear after expiry (15sec by default)
+    setTimeout(() => {
+      this.clearIgnoredLog(type, ignoreId);
+    }, timeout || 1000 * 15);
+  }
+
+  isLogIgnored(type: LogType, ignoreId: any) {
+    return this.ignoredLogs.some(info => type === info.type && ignoreId === info.ignoreId);
+  }
+
+  clearIgnoredLog(type: LogType, ignoreId: any) {
+    this.ignoredLogs.splice(this.ignoredLogs.findIndex(info => type === info.type && ignoreId === info.ignoreId), 1);
+  }
+}