整理した

src/models/auth-session.ts

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+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import db from '../db/mongodb';
+import { pack as packApp } from './app';
+
+const AuthSession = db.get<IAuthSession>('authSessions');
+export default AuthSession;
+
+export interface IAuthSession {
+	_id: mongo.ObjectID;
+	createdAt: Date;
+	appId: mongo.ObjectID;
+	userId: mongo.ObjectID;
+	token: string;
+}
+
+/**
+ * Pack an auth session for API response
+ *
+ * @param {any} session
+ * @param {any} me?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	session: any,
+	me?: any
+) => new Promise<any>(async (resolve, reject) => {
+	let _session: any;
+
+	// TODO: Populate session if it ID
+	_session = deepcopy(session);
+
+	// Me
+	if (me && !mongo.ObjectID.prototype.isPrototypeOf(me)) {
+		if (typeof me === 'string') {
+			me = new mongo.ObjectID(me);
+		} else {
+			me = me._id;
+		}
+	}
+
+	delete _session._id;
+
+	// Populate app
+	_session.app = await packApp(_session.appId, me);
+
+	resolve(_session);
+});