/* * Copyright (C) 2020 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 Environment { constructor() { this._cachedEnvironmentInfo = null; } async prepare() { this._cachedEnvironmentInfo = await this._loadEnvironmentInfo(); } getInfo() { if (this._cachedEnvironmentInfo === null) { throw new Error('Not prepared'); } return this._cachedEnvironmentInfo; } async _loadEnvironmentInfo() { const browser = await this._getBrowser(); const os = await this._getOperatingSystem(); return { browser, platform: {os} }; } async _getOperatingSystem() { try { const {os} = await this._getPlatformInfo(); if (typeof os === 'string') { return os; } } catch (e) { // NOP } return 'unknown'; } _getPlatformInfo() { return new Promise((resolve, reject) => { chrome.runtime.getPlatformInfo((result) => { const error = chrome.runtime.lastError; if (error) { reject(error); } else { resolve(result); } }); }); } async _getBrowser() { try { if (chrome.runtime.getURL('/').startsWith('ms-browser-extension://')) { return 'edge-legacy'; } if (/\bEdge?\//.test(navigator.userAgent)) { return 'edge'; } } catch (e) { // NOP } if (typeof browser !== 'undefined') { try { const info = await browser.runtime.getBrowserInfo(); if (info.name === 'Fennec') { return 'firefox-mobile'; } } catch (e) { // NOP } return 'firefox'; } else { return 'chrome'; } } }