/* * Copyright (C) 2020-2022 Yomichan Authors * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ class FrameEndpoint { constructor() { this._secret = generateId(16); this._token = null; this._eventListeners = new EventListenerCollection(); this._eventListenersSetup = false; } signal() { if (!this._eventListenersSetup) { this._eventListeners.addEventListener(window, 'message', this._onMessage.bind(this), false); this._eventListenersSetup = true; } yomichan.api.broadcastTab('frameEndpointReady', {secret: this._secret}); } authenticate(message) { return ( this._token !== null && isObject(message) && this._token === message.token && this._secret === message.secret ); } _onMessage(e) { if (this._token !== null) { return; } // Already initialized const data = e.data; if (!isObject(data) || data.action !== 'frameEndpointConnect') { return; } // Invalid message const params = data.params; if (!isObject(params)) { return; } // Invalid data const secret = params.secret; if (secret !== this._secret) { return; } // Invalid authentication const {token, hostFrameId} = params; this._token = token; this._eventListeners.removeAllEventListeners(); yomichan.api.sendMessageToFrame(hostFrameId, 'frameEndpointConnected', {secret, token}); } }