/* * Copyright (C) 2023-2024 Yomitan Authors * 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/>. */ export class Environment { constructor() { /** @type {?import('environment').Info} */ this._cachedEnvironmentInfo = null; } /** * @returns {Promise<void>} */ async prepare() { this._cachedEnvironmentInfo = await this._loadEnvironmentInfo(); } /** * @returns {import('environment').Info} * @throws {Error} */ getInfo() { if (this._cachedEnvironmentInfo === null) { throw new Error('Not prepared'); } return this._cachedEnvironmentInfo; } /** * @returns {Promise<import('environment').Info>} */ async _loadEnvironmentInfo() { const os = await this._getOperatingSystem(); const browser = await this._getBrowser(os); return { browser, platform: {os}, }; } /** * @returns {Promise<import('environment').OperatingSystem>} */ async _getOperatingSystem() { try { const {os} = await this._getPlatformInfo(); if (typeof os === 'string') { return os; } } catch (e) { // NOP } return 'unknown'; } /** * @returns {Promise<chrome.runtime.PlatformInfo>} */ _getPlatformInfo() { return new Promise((resolve, reject) => { chrome.runtime.getPlatformInfo((result) => { const error = chrome.runtime.lastError; if (error) { reject(error); } else { resolve(result); } }); }); } /** * @param {import('environment').OperatingSystem} os * @returns {Promise<import('environment').Browser>} */ async _getBrowser(os) { 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') { if (this._isSafari()) { return 'safari'; } if (os === 'android') { return 'firefox-mobile'; } return 'firefox'; } else { return 'chrome'; } } /** * @returns {boolean}; */ _isSafari() { const {vendor, userAgent} = navigator; return ( typeof vendor === 'string' && typeof userAgent === 'string' && vendor.includes('Apple') && !userAgent.includes('CriOS') && !userAgent.includes('FxiOS') ); } }