/* * Copyright (C) 2019-2020 Alex Yatskov <alex@foosoft.net> * Author: Alex Yatskov <alex@foosoft.net> * * 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 BackendApiForwarder { constructor() { chrome.runtime.onConnect.addListener(this.onConnect.bind(this)); } onConnect(port) { if (port.name !== 'backend-api-forwarder') { return; } let tabId; if (!( port.sender && port.sender.tab && (typeof (tabId = port.sender.tab.id)) === 'number' )) { port.disconnect(); return; } const forwardPort = chrome.tabs.connect(tabId, {name: 'frontend-api-receiver'}); port.onMessage.addListener((message) => forwardPort.postMessage(message)); forwardPort.onMessage.addListener((message) => port.postMessage(message)); port.onDisconnect.addListener(() => forwardPort.disconnect()); forwardPort.onDisconnect.addListener(() => port.disconnect()); } }