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/*
* 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 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
}
if (this._isSafari()) {
return 'safari';
}
return 'firefox';
} else {
return 'chrome';
}
}
_isSafari() {
const {vendor, userAgent} = navigator;
return (
typeof vendor === 'string' &&
typeof userAgent === 'string' &&
vendor.includes('Apple') &&
!userAgent.includes('CriOS') &&
!userAgent.includes('FxiOS')
);
}
}
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