refactoring

Resolve #7779

packages/backend/src/services/chart/charts/classes/active-users.ts

@@ -0,0 +1,47 @@
+import autobind from 'autobind-decorator';
+import Chart, { Obj, DeepPartial } from '../../core';
+import { User } from '@/models/entities/user';
+import { SchemaType } from '@/misc/schema';
+import { Users } from '@/models/index';
+import { name, schema } from '../schemas/active-users';
+
+type ActiveUsersLog = SchemaType<typeof schema>;
+
+export default class ActiveUsersChart extends Chart<ActiveUsersLog> {
+	constructor() {
+		super(name, schema);
+	}
+
+	@autobind
+	protected genNewLog(latest: ActiveUsersLog): DeepPartial<ActiveUsersLog> {
+		return {};
+	}
+
+	@autobind
+	protected aggregate(logs: ActiveUsersLog[]): ActiveUsersLog {
+		return {
+			local: {
+				users: logs.reduce((a, b) => a.concat(b.local.users), [] as ActiveUsersLog['local']['users']),
+			},
+			remote: {
+				users: logs.reduce((a, b) => a.concat(b.remote.users), [] as ActiveUsersLog['remote']['users']),
+			},
+		};
+	}
+
+	@autobind
+	protected async fetchActual(): Promise<DeepPartial<ActiveUsersLog>> {
+		return {};
+	}
+
+	@autobind
+	public async update(user: { id: User['id'], host: User['host'] }) {
+		const update: Obj = {
+			users: [user.id]
+		};
+
+		await this.inc({
+			[Users.isLocalUser(user) ? 'local' : 'remote']: update
+		});
+	}
+}