add wrapper around multiple rest sessions

src/rest/multi.js

@@ -0,0 +1,61 @@
+/*
+Copyright 2018 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const request = require('request-promise-native');
+const RestRoom = require('./room');
+const {approveConsent} = require('./consent');
+
+module.exports = class RestMultiSession {
+    constructor(sessions) {
+        this.sessions = sessions;
+    }
+
+    slice(start, end) {
+        return new RestMultiSession(this.sessions.slice(start, end));
+    }
+
+    pop(userName) {
+        const idx = this.sessions.findIndex((s) => s.userName() === userName);
+        if(idx === -1) {
+            throw new Error(`user ${userName} not found`);
+        }
+        const session = this.sessions.splice(idx, 1)[0];
+        return session;
+    }
+
+    async setDisplayName(fn) {
+        await Promise.all(this.sessions.map((s) => s.setDisplayName(fn(s))));
+    }
+
+    async join(roomId) {
+        const rooms = await Promise.all(this.sessions.map((s) => s.join(roomId)));
+        return new RestMultiRoom(rooms);
+    }
+}
+
+class RestMultiRoom {
+    constructor(rooms) {
+        this.rooms = rooms;
+    }
+
+    async talk(message) {
+        await Promise.all(this.rooms.map((r) => r.talk(message)));
+    }
+
+    async leave() {
+        await Promise.all(this.rooms.map((r) => r.leave()));
+    }
+}