fix: 修复配额说明重复和undefined问题

- 在editStorageForm中初始化oss_storage_quota_value和oss_quota_unit
- 删除重复的旧配额说明块，保留新的当前配额设置显示

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/node_modules/bowser/src/bowser.js

@@ -0,0 +1,77 @@
+/*!
+ * Bowser - a browser detector
+ * https://github.com/lancedikson/bowser
+ * MIT License | (c) Dustin Diaz 2012-2015
+ * MIT License | (c) Denis Demchenko 2015-2019
+ */
+import Parser from './parser.js';
+import {
+  BROWSER_MAP,
+  ENGINE_MAP,
+  OS_MAP,
+  PLATFORMS_MAP,
+} from './constants.js';
+
+/**
+ * Bowser class.
+ * Keep it simple as much as it can be.
+ * It's supposed to work with collections of {@link Parser} instances
+ * rather then solve one-instance problems.
+ * All the one-instance stuff is located in Parser class.
+ *
+ * @class
+ * @classdesc Bowser is a static object, that provides an API to the Parsers
+ * @hideconstructor
+ */
+class Bowser {
+  /**
+   * Creates a {@link Parser} instance
+   *
+   * @param {String} UA UserAgent string
+   * @param {Boolean} [skipParsing=false] Will make the Parser postpone parsing until you ask it
+   * explicitly. Same as `skipParsing` for {@link Parser}.
+   * @returns {Parser}
+   * @throws {Error} when UA is not a String
+   *
+   * @example
+   * const parser = Bowser.getParser(window.navigator.userAgent);
+   * const result = parser.getResult();
+   */
+  static getParser(UA, skipParsing = false) {
+    if (typeof UA !== 'string') {
+      throw new Error('UserAgent should be a string');
+    }
+    return new Parser(UA, skipParsing);
+  }
+
+  /**
+   * Creates a {@link Parser} instance and runs {@link Parser.getResult} immediately
+   *
+   * @param UA
+   * @return {ParsedResult}
+   *
+   * @example
+   * const result = Bowser.parse(window.navigator.userAgent);
+   */
+  static parse(UA) {
+    return (new Parser(UA)).getResult();
+  }
+
+  static get BROWSER_MAP() {
+    return BROWSER_MAP;
+  }
+
+  static get ENGINE_MAP() {
+    return ENGINE_MAP;
+  }
+
+  static get OS_MAP() {
+    return OS_MAP;
+  }
+
+  static get PLATFORMS_MAP() {
+    return PLATFORMS_MAP;
+  }
+}
+
+export default Bowser;

backend/node_modules/bowser/src/constants.js

@@ -0,0 +1,169 @@
+// NOTE: this list must be up-to-date with browsers listed in
+// test/acceptance/useragentstrings.yml
+export const BROWSER_ALIASES_MAP = {
+  AmazonBot: 'amazonbot',
+  'Amazon Silk': 'amazon_silk',
+  'Android Browser': 'android',
+  BaiduSpider: 'baiduspider',
+  Bada: 'bada',
+  BingCrawler: 'bingcrawler',
+  BlackBerry: 'blackberry',
+  'ChatGPT-User': 'chatgpt_user',
+  Chrome: 'chrome',
+  ClaudeBot: 'claudebot',
+  Chromium: 'chromium',
+  Diffbot: 'diffbot',
+  DuckDuckBot: 'duckduckbot',
+  Electron: 'electron',
+  Epiphany: 'epiphany',
+  FacebookExternalHit: 'facebookexternalhit',
+  Firefox: 'firefox',
+  Focus: 'focus',
+  Generic: 'generic',
+  'Google Search': 'google_search',
+  Googlebot: 'googlebot',
+  GPTBot: 'gptbot',
+  'Internet Explorer': 'ie',
+  InternetArchiveCrawler: 'internetarchivecrawler',
+  'K-Meleon': 'k_meleon',
+  LibreWolf: 'librewolf',
+  Maxthon: 'maxthon',
+  'Meta-ExternalAds': 'meta_externalads',
+  'Meta-ExternalAgent': 'meta_externalagent',
+  'Meta-ExternalFetcher': 'meta_externalfetcher',
+  'Meta-WebIndexer': 'meta_webindexer',
+  'Microsoft Edge': 'edge',
+  'MZ Browser': 'mz',
+  'NAVER Whale Browser': 'naver',
+  'OAI-SearchBot': 'oai_searchbot',
+  Omgilibot: 'omgilibot',
+  Opera: 'opera',
+  'Opera Coast': 'opera_coast',
+  'Pale Moon': 'pale_moon',
+  PerplexityBot: 'perplexitybot',
+  'Perplexity-User': 'perplexity_user',
+  PhantomJS: 'phantomjs',
+  PingdomBot: 'pingdombot',
+  Puffin: 'puffin',
+  QQ: 'qq',
+  QQLite: 'qqlite',
+  QupZilla: 'qupzilla',
+  Roku: 'roku',
+  Safari: 'safari',
+  Sailfish: 'sailfish',
+  'Samsung Internet for Android': 'samsung_internet',
+  SeaMonkey: 'seamonkey',
+  Sleipnir: 'sleipnir',
+  'Sogou Browser': 'sogou',
+  Swing: 'swing',
+  Tizen: 'tizen',
+  'UC Browser': 'uc',
+  Vivaldi: 'vivaldi',
+  'WebOS Browser': 'webos',
+  WeChat: 'wechat',
+  YahooSlurp: 'yahooslurp',
+  'Yandex Browser': 'yandex',
+  YandexBot: 'yandexbot',
+  YouBot: 'youbot',
+};
+
+export const BROWSER_MAP = {
+  amazonbot: 'AmazonBot',
+  amazon_silk: 'Amazon Silk',
+  android: 'Android Browser',
+  baiduspider: 'BaiduSpider',
+  bada: 'Bada',
+  bingcrawler: 'BingCrawler',
+  blackberry: 'BlackBerry',
+  chatgpt_user: 'ChatGPT-User',
+  chrome: 'Chrome',
+  claudebot: 'ClaudeBot',
+  chromium: 'Chromium',
+  diffbot: 'Diffbot',
+  duckduckbot: 'DuckDuckBot',
+  edge: 'Microsoft Edge',
+  electron: 'Electron',
+  epiphany: 'Epiphany',
+  facebookexternalhit: 'FacebookExternalHit',
+  firefox: 'Firefox',
+  focus: 'Focus',
+  generic: 'Generic',
+  google_search: 'Google Search',
+  googlebot: 'Googlebot',
+  gptbot: 'GPTBot',
+  ie: 'Internet Explorer',
+  internetarchivecrawler: 'InternetArchiveCrawler',
+  k_meleon: 'K-Meleon',
+  librewolf: 'LibreWolf',
+  maxthon: 'Maxthon',
+  meta_externalads: 'Meta-ExternalAds',
+  meta_externalagent: 'Meta-ExternalAgent',
+  meta_externalfetcher: 'Meta-ExternalFetcher',
+  meta_webindexer: 'Meta-WebIndexer',
+  mz: 'MZ Browser',
+  naver: 'NAVER Whale Browser',
+  oai_searchbot: 'OAI-SearchBot',
+  omgilibot: 'Omgilibot',
+  opera: 'Opera',
+  opera_coast: 'Opera Coast',
+  pale_moon: 'Pale Moon',
+  perplexitybot: 'PerplexityBot',
+  perplexity_user: 'Perplexity-User',
+  phantomjs: 'PhantomJS',
+  pingdombot: 'PingdomBot',
+  puffin: 'Puffin',
+  qq: 'QQ Browser',
+  qqlite: 'QQ Browser Lite',
+  qupzilla: 'QupZilla',
+  roku: 'Roku',
+  safari: 'Safari',
+  sailfish: 'Sailfish',
+  samsung_internet: 'Samsung Internet for Android',
+  seamonkey: 'SeaMonkey',
+  sleipnir: 'Sleipnir',
+  sogou: 'Sogou Browser',
+  swing: 'Swing',
+  tizen: 'Tizen',
+  uc: 'UC Browser',
+  vivaldi: 'Vivaldi',
+  webos: 'WebOS Browser',
+  wechat: 'WeChat',
+  yahooslurp: 'YahooSlurp',
+  yandex: 'Yandex Browser',
+  yandexbot: 'YandexBot',
+  youbot: 'YouBot',
+};
+
+export const PLATFORMS_MAP = {
+  bot: 'bot',
+  desktop: 'desktop',
+  mobile: 'mobile',
+  tablet: 'tablet',
+  tv: 'tv',
+};
+
+export const OS_MAP = {
+  Android: 'Android',
+  Bada: 'Bada',
+  BlackBerry: 'BlackBerry',
+  ChromeOS: 'Chrome OS',
+  HarmonyOS: 'HarmonyOS',
+  iOS: 'iOS',
+  Linux: 'Linux',
+  MacOS: 'macOS',
+  PlayStation4: 'PlayStation 4',
+  Roku: 'Roku',
+  Tizen: 'Tizen',
+  WebOS: 'WebOS',
+  Windows: 'Windows',
+  WindowsPhone: 'Windows Phone',
+};
+
+export const ENGINE_MAP = {
+  Blink: 'Blink',
+  EdgeHTML: 'EdgeHTML',
+  Gecko: 'Gecko',
+  Presto: 'Presto',
+  Trident: 'Trident',
+  WebKit: 'WebKit',
+};

backend/node_modules/bowser/src/parser-engines.js

@@ -0,0 +1,120 @@
+import Utils from './utils.js';
+import { ENGINE_MAP } from './constants.js';
+
+/*
+ * More specific goes first
+ */
+export default [
+  /* EdgeHTML */
+  {
+    test(parser) {
+      return parser.getBrowserName(true) === 'microsoft edge';
+    },
+    describe(ua) {
+      const isBlinkBased = /\sedg\//i.test(ua);
+
+      // return blink if it's blink-based one
+      if (isBlinkBased) {
+        return {
+          name: ENGINE_MAP.Blink,
+        };
+      }
+
+      // otherwise match the version and return EdgeHTML
+      const version = Utils.getFirstMatch(/edge\/(\d+(\.?_?\d+)+)/i, ua);
+
+      return {
+        name: ENGINE_MAP.EdgeHTML,
+        version,
+      };
+    },
+  },
+
+  /* Trident */
+  {
+    test: [/trident/i],
+    describe(ua) {
+      const engine = {
+        name: ENGINE_MAP.Trident,
+      };
+
+      const version = Utils.getFirstMatch(/trident\/(\d+(\.?_?\d+)+)/i, ua);
+
+      if (version) {
+        engine.version = version;
+      }
+
+      return engine;
+    },
+  },
+
+  /* Presto */
+  {
+    test(parser) {
+      return parser.test(/presto/i);
+    },
+    describe(ua) {
+      const engine = {
+        name: ENGINE_MAP.Presto,
+      };
+
+      const version = Utils.getFirstMatch(/presto\/(\d+(\.?_?\d+)+)/i, ua);
+
+      if (version) {
+        engine.version = version;
+      }
+
+      return engine;
+    },
+  },
+
+  /* Gecko */
+  {
+    test(parser) {
+      const isGecko = parser.test(/gecko/i);
+      const likeGecko = parser.test(/like gecko/i);
+      return isGecko && !likeGecko;
+    },
+    describe(ua) {
+      const engine = {
+        name: ENGINE_MAP.Gecko,
+      };
+
+      const version = Utils.getFirstMatch(/gecko\/(\d+(\.?_?\d+)+)/i, ua);
+
+      if (version) {
+        engine.version = version;
+      }
+
+      return engine;
+    },
+  },
+
+  /* Blink */
+  {
+    test: [/(apple)?webkit\/537\.36/i],
+    describe() {
+      return {
+        name: ENGINE_MAP.Blink,
+      };
+    },
+  },
+
+  /* WebKit */
+  {
+    test: [/(apple)?webkit/i],
+    describe(ua) {
+      const engine = {
+        name: ENGINE_MAP.WebKit,
+      };
+
+      const version = Utils.getFirstMatch(/webkit\/(\d+(\.?_?\d+)+)/i, ua);
+
+      if (version) {
+        engine.version = version;
+      }
+
+      return engine;
+    },
+  },
+];

backend/node_modules/bowser/src/parser-os.js

@@ -0,0 +1,211 @@
+import Utils from './utils.js';
+import { OS_MAP } from './constants.js';
+
+export default [
+  /* Roku */
+  {
+    test: [/Roku\/DVP/],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/Roku\/DVP-(\d+\.\d+)/i, ua);
+      return {
+        name: OS_MAP.Roku,
+        version,
+      };
+    },
+  },
+
+  /* Windows Phone */
+  {
+    test: [/windows phone/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/windows phone (?:os)?\s?(\d+(\.\d+)*)/i, ua);
+      return {
+        name: OS_MAP.WindowsPhone,
+        version,
+      };
+    },
+  },
+
+  /* Windows */
+  {
+    test: [/windows /i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/Windows ((NT|XP)( \d\d?.\d)?)/i, ua);
+      const versionName = Utils.getWindowsVersionName(version);
+
+      return {
+        name: OS_MAP.Windows,
+        version,
+        versionName,
+      };
+    },
+  },
+
+  /* Firefox on iPad */
+  {
+    test: [/Macintosh(.*?) FxiOS(.*?)\//],
+    describe(ua) {
+      const result = {
+        name: OS_MAP.iOS,
+      };
+      const version = Utils.getSecondMatch(/(Version\/)(\d[\d.]+)/, ua);
+      if (version) {
+        result.version = version;
+      }
+      return result;
+    },
+  },
+
+  /* macOS */
+  {
+    test: [/macintosh/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/mac os x (\d+(\.?_?\d+)+)/i, ua).replace(/[_\s]/g, '.');
+      const versionName = Utils.getMacOSVersionName(version);
+
+      const os = {
+        name: OS_MAP.MacOS,
+        version,
+      };
+      if (versionName) {
+        os.versionName = versionName;
+      }
+      return os;
+    },
+  },
+
+  /* iOS */
+  {
+    test: [/(ipod|iphone|ipad)/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/os (\d+([_\s]\d+)*) like mac os x/i, ua).replace(/[_\s]/g, '.');
+
+      return {
+        name: OS_MAP.iOS,
+        version,
+      };
+    },
+  },
+
+  /* HarmonyOS */
+  {
+    test: [/OpenHarmony/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/OpenHarmony\s+(\d+(\.\d+)*)/i, ua);
+      return {
+        name: OS_MAP.HarmonyOS,
+        version,
+      };
+    },
+  },
+
+  /* Android */
+  {
+    test(parser) {
+      const notLikeAndroid = !parser.test(/like android/i);
+      const butAndroid = parser.test(/android/i);
+      return notLikeAndroid && butAndroid;
+    },
+    describe(ua) {
+      const version = Utils.getFirstMatch(/android[\s/-](\d+(\.\d+)*)/i, ua);
+      const versionName = Utils.getAndroidVersionName(version);
+      const os = {
+        name: OS_MAP.Android,
+        version,
+      };
+      if (versionName) {
+        os.versionName = versionName;
+      }
+      return os;
+    },
+  },
+
+  /* WebOS */
+  {
+    test: [/(web|hpw)[o0]s/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/(?:web|hpw)[o0]s\/(\d+(\.\d+)*)/i, ua);
+      const os = {
+        name: OS_MAP.WebOS,
+      };
+
+      if (version && version.length) {
+        os.version = version;
+      }
+      return os;
+    },
+  },
+
+  /* BlackBerry */
+  {
+    test: [/blackberry|\bbb\d+/i, /rim\stablet/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/rim\stablet\sos\s(\d+(\.\d+)*)/i, ua)
+        || Utils.getFirstMatch(/blackberry\d+\/(\d+([_\s]\d+)*)/i, ua)
+        || Utils.getFirstMatch(/\bbb(\d+)/i, ua);
+
+      return {
+        name: OS_MAP.BlackBerry,
+        version,
+      };
+    },
+  },
+
+  /* Bada */
+  {
+    test: [/bada/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/bada\/(\d+(\.\d+)*)/i, ua);
+
+      return {
+        name: OS_MAP.Bada,
+        version,
+      };
+    },
+  },
+
+  /* Tizen */
+  {
+    test: [/tizen/i],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/tizen[/\s](\d+(\.\d+)*)/i, ua);
+
+      return {
+        name: OS_MAP.Tizen,
+        version,
+      };
+    },
+  },
+
+  /* Linux */
+  {
+    test: [/linux/i],
+    describe() {
+      return {
+        name: OS_MAP.Linux,
+      };
+    },
+  },
+
+  /* Chrome OS */
+  {
+    test: [/CrOS/],
+    describe() {
+      return {
+        name: OS_MAP.ChromeOS,
+      };
+    },
+  },
+
+  /* Playstation 4 */
+  {
+    test: [/PlayStation 4/],
+    describe(ua) {
+      const version = Utils.getFirstMatch(/PlayStation 4[/\s](\d+(\.\d+)*)/i, ua);
+      return {
+        name: OS_MAP.PlayStation4,
+        version,
+      };
+    },
+  },
+];

backend/node_modules/bowser/src/parser-platforms.js

@@ -0,0 +1,524 @@
+import Utils from './utils.js';
+import { PLATFORMS_MAP } from './constants.js';
+
+/*
+ * Tablets go first since usually they have more specific
+ * signs to detect.
+ */
+
+export default [
+  /* Googlebot */
+  {
+    test: [/googlebot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Google',
+      };
+    },
+  },
+
+  /* AmazonBot */
+  {
+    test: [/amazonbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Amazon',
+      };
+    },
+  },
+
+  /* GPTBot */
+  {
+    test: [/gptbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'OpenAI',
+      };
+    },
+  },
+
+  /* ChatGPT-User */
+  {
+    test: [/chatgpt-user/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'OpenAI',
+      };
+    },
+  },
+
+  /* OAI-SearchBot */
+  {
+    test: [/oai-searchbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'OpenAI',
+      };
+    },
+  },
+
+  /* Baidu */
+  {
+    test: [/baiduspider/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Baidu',
+      };
+    },
+  },
+
+  /* Bingbot */
+  {
+    test: [/bingbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Bing',
+      };
+    },
+  },
+
+  /* DuckDuckBot */
+  {
+    test: [/duckduckbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'DuckDuckGo',
+      };
+    },
+  },
+
+  /* ClaudeBot */
+  {
+    test: [/claudebot/i, /claude-web/i, /claude-user/i, /claude-searchbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Anthropic',
+      };
+    },
+  },
+
+  /* Omgilibot */
+  {
+    test: [/omgilibot/i, /webzio-extended/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Webz.io',
+      };
+    },
+  },
+
+  /* Diffbot */
+  {
+    test: [/diffbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Diffbot',
+      };
+    },
+  },
+
+  /* PerplexityBot */
+  {
+    test: [/perplexitybot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Perplexity AI',
+      };
+    },
+  },
+
+  /* Perplexity-User */
+  {
+    test: [/perplexity-user/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Perplexity AI',
+      };
+    },
+  },
+
+  /* YouBot */
+  {
+    test: [/youbot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'You.com',
+      };
+    },
+  },
+
+  /* Internet Archive Crawler */
+  {
+    test: [/ia_archiver/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Internet Archive',
+      };
+    },
+  },
+
+  /* Meta-WebIndexer */
+  {
+    test: [/meta-webindexer/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Meta',
+      };
+    },
+  },
+
+  /* Meta-ExternalAds */
+  {
+    test: [/meta-externalads/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Meta',
+      };
+    },
+  },
+
+  /* Meta-ExternalAgent */
+  {
+    test: [/meta-externalagent/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Meta',
+      };
+    },
+  },
+
+  /* Meta-ExternalFetcher */
+  {
+    test: [/meta-externalfetcher/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Meta',
+      };
+    },
+  },
+
+  /* Meta Web Crawler */
+  {
+    test: [/facebookexternalhit/i, /facebookcatalog/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Meta',
+      };
+    },
+  },
+
+  /* Yahoo! Slurp */
+  {
+    test: [/yahoo/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Yahoo',
+      };
+    },
+  },
+
+  /* Yandex */
+  {
+    test: [/yandexbot/i, /yandexmobilebot/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Yandex',
+      };
+    },
+  },
+
+  /* Pingdom */
+  {
+    test: [/pingdom/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.bot,
+        vendor: 'Pingdom',
+      };
+    },
+  },
+
+  /* Huawei */
+  {
+    test: [/huawei/i],
+    describe(ua) {
+      const model = Utils.getFirstMatch(/(can-l01)/i, ua) && 'Nova';
+      const platform = {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'Huawei',
+      };
+      if (model) {
+        platform.model = model;
+      }
+      return platform;
+    },
+  },
+
+  /* Nexus Tablet */
+  {
+    test: [/nexus\s*(?:7|8|9|10).*/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+        vendor: 'Nexus',
+      };
+    },
+  },
+
+  /* iPad */
+  {
+    test: [/ipad/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+        vendor: 'Apple',
+        model: 'iPad',
+      };
+    },
+  },
+
+  /* Firefox on iPad */
+  {
+    test: [/Macintosh(.*?) FxiOS(.*?)\//],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+        vendor: 'Apple',
+        model: 'iPad',
+      };
+    },
+  },
+
+  /* Amazon Kindle Fire */
+  {
+    test: [/kftt build/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+        vendor: 'Amazon',
+        model: 'Kindle Fire HD 7',
+      };
+    },
+  },
+
+  /* Another Amazon Tablet with Silk */
+  {
+    test: [/silk/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+        vendor: 'Amazon',
+      };
+    },
+  },
+
+  /* Tablet */
+  {
+    test: [/tablet(?! pc)/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+      };
+    },
+  },
+
+  /* iPod/iPhone */
+  {
+    test(parser) {
+      const iDevice = parser.test(/ipod|iphone/i);
+      const likeIDevice = parser.test(/like (ipod|iphone)/i);
+      return iDevice && !likeIDevice;
+    },
+    describe(ua) {
+      const model = Utils.getFirstMatch(/(ipod|iphone)/i, ua);
+      return {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'Apple',
+        model,
+      };
+    },
+  },
+
+  /* Nexus Mobile */
+  {
+    test: [/nexus\s*[0-6].*/i, /galaxy nexus/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'Nexus',
+      };
+    },
+  },
+
+  /* Nokia */
+  {
+    test: [/Nokia/i],
+    describe(ua) {
+      const model = Utils.getFirstMatch(/Nokia\s+([0-9]+(\.[0-9]+)?)/i, ua);
+      const platform = {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'Nokia',
+      };
+      if (model) {
+        platform.model = model;
+      }
+      return platform;
+    },
+  },
+
+  /* Mobile */
+  {
+    test: [/[^-]mobi/i],
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+      };
+    },
+  },
+
+  /* BlackBerry */
+  {
+    test(parser) {
+      return parser.getBrowserName(true) === 'blackberry';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'BlackBerry',
+      };
+    },
+  },
+
+  /* Bada */
+  {
+    test(parser) {
+      return parser.getBrowserName(true) === 'bada';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+      };
+    },
+  },
+
+  /* Windows Phone */
+  {
+    test(parser) {
+      return parser.getBrowserName() === 'windows phone';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+        vendor: 'Microsoft',
+      };
+    },
+  },
+
+  /* Android Tablet */
+  {
+    test(parser) {
+      const osMajorVersion = Number(String(parser.getOSVersion()).split('.')[0]);
+      return parser.getOSName(true) === 'android' && (osMajorVersion >= 3);
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tablet,
+      };
+    },
+  },
+
+  /* Android Mobile */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'android';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.mobile,
+      };
+    },
+  },
+
+  /* desktop */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'macos';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.desktop,
+        vendor: 'Apple',
+      };
+    },
+  },
+
+  /* Windows */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'windows';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.desktop,
+      };
+    },
+  },
+
+  /* Linux */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'linux';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.desktop,
+      };
+    },
+  },
+
+  /* PlayStation 4 */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'playstation 4';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tv,
+      };
+    },
+  },
+
+  /* Roku */
+  {
+    test(parser) {
+      return parser.getOSName(true) === 'roku';
+    },
+    describe() {
+      return {
+        type: PLATFORMS_MAP.tv,
+      };
+    },
+  },
+];

backend/node_modules/bowser/src/parser.js

@@ -0,0 +1,511 @@
+import browserParsersList from './parser-browsers.js';
+import osParsersList from './parser-os.js';
+import platformParsersList from './parser-platforms.js';
+import enginesParsersList from './parser-engines.js';
+import Utils from './utils.js';
+
+/**
+ * The main class that arranges the whole parsing process.
+ */
+class Parser {
+  /**
+   * Create instance of Parser
+   *
+   * @param {String} UA User-Agent string
+   * @param {Boolean} [skipParsing=false] parser can skip parsing in purpose of performance
+   * improvements if you need to make a more particular parsing
+   * like {@link Parser#parseBrowser} or {@link Parser#parsePlatform}
+   *
+   * @throw {Error} in case of empty UA String
+   *
+   * @constructor
+   */
+  constructor(UA, skipParsing = false) {
+    if (UA === void (0) || UA === null || UA === '') {
+      throw new Error("UserAgent parameter can't be empty");
+    }
+
+    this._ua = UA;
+
+    /**
+     * @typedef ParsedResult
+     * @property {Object} browser
+     * @property {String|undefined} [browser.name]
+     * Browser name, like `"Chrome"` or `"Internet Explorer"`
+     * @property {String|undefined} [browser.version] Browser version as a String `"12.01.45334.10"`
+     * @property {Object} os
+     * @property {String|undefined} [os.name] OS name, like `"Windows"` or `"macOS"`
+     * @property {String|undefined} [os.version] OS version, like `"NT 5.1"` or `"10.11.1"`
+     * @property {String|undefined} [os.versionName] OS name, like `"XP"` or `"High Sierra"`
+     * @property {Object} platform
+     * @property {String|undefined} [platform.type]
+     * platform type, can be either `"desktop"`, `"tablet"` or `"mobile"`
+     * @property {String|undefined} [platform.vendor] Vendor of the device,
+     * like `"Apple"` or `"Samsung"`
+     * @property {String|undefined} [platform.model] Device model,
+     * like `"iPhone"` or `"Kindle Fire HD 7"`
+     * @property {Object} engine
+     * @property {String|undefined} [engine.name]
+     * Can be any of this: `WebKit`, `Blink`, `Gecko`, `Trident`, `Presto`, `EdgeHTML`
+     * @property {String|undefined} [engine.version] String version of the engine
+     */
+    this.parsedResult = {};
+
+    if (skipParsing !== true) {
+      this.parse();
+    }
+  }
+
+  /**
+   * Get UserAgent string of current Parser instance
+   * @return {String} User-Agent String of the current <Parser> object
+   *
+   * @public
+   */
+  getUA() {
+    return this._ua;
+  }
+
+  /**
+   * Test a UA string for a regexp
+   * @param {RegExp} regex
+   * @return {Boolean}
+   */
+  test(regex) {
+    return regex.test(this._ua);
+  }
+
+  /**
+   * Get parsed browser object
+   * @return {Object}
+   */
+  parseBrowser() {
+    this.parsedResult.browser = {};
+
+    const browserDescriptor = Utils.find(browserParsersList, (_browser) => {
+      if (typeof _browser.test === 'function') {
+        return _browser.test(this);
+      }
+
+      if (Array.isArray(_browser.test)) {
+        return _browser.test.some(condition => this.test(condition));
+      }
+
+      throw new Error("Browser's test function is not valid");
+    });
+
+    if (browserDescriptor) {
+      this.parsedResult.browser = browserDescriptor.describe(this.getUA());
+    }
+
+    return this.parsedResult.browser;
+  }
+
+  /**
+   * Get parsed browser object
+   * @return {Object}
+   *
+   * @public
+   */
+  getBrowser() {
+    if (this.parsedResult.browser) {
+      return this.parsedResult.browser;
+    }
+
+    return this.parseBrowser();
+  }
+
+  /**
+   * Get browser's name
+   * @return {String} Browser's name or an empty string
+   *
+   * @public
+   */
+  getBrowserName(toLowerCase) {
+    if (toLowerCase) {
+      return String(this.getBrowser().name).toLowerCase() || '';
+    }
+    return this.getBrowser().name || '';
+  }
+
+
+  /**
+   * Get browser's version
+   * @return {String} version of browser
+   *
+   * @public
+   */
+  getBrowserVersion() {
+    return this.getBrowser().version;
+  }
+
+  /**
+   * Get OS
+   * @return {Object}
+   *
+   * @example
+   * this.getOS();
+   * {
+   *   name: 'macOS',
+   *   version: '10.11.12'
+   * }
+   */
+  getOS() {
+    if (this.parsedResult.os) {
+      return this.parsedResult.os;
+    }
+
+    return this.parseOS();
+  }
+
+  /**
+   * Parse OS and save it to this.parsedResult.os
+   * @return {*|{}}
+   */
+  parseOS() {
+    this.parsedResult.os = {};
+
+    const os = Utils.find(osParsersList, (_os) => {
+      if (typeof _os.test === 'function') {
+        return _os.test(this);
+      }
+
+      if (Array.isArray(_os.test)) {
+        return _os.test.some(condition => this.test(condition));
+      }
+
+      throw new Error("Browser's test function is not valid");
+    });
+
+    if (os) {
+      this.parsedResult.os = os.describe(this.getUA());
+    }
+
+    return this.parsedResult.os;
+  }
+
+  /**
+   * Get OS name
+   * @param {Boolean} [toLowerCase] return lower-cased value
+   * @return {String} name of the OS — macOS, Windows, Linux, etc.
+   */
+  getOSName(toLowerCase) {
+    const { name } = this.getOS();
+
+    if (toLowerCase) {
+      return String(name).toLowerCase() || '';
+    }
+
+    return name || '';
+  }
+
+  /**
+   * Get OS version
+   * @return {String} full version with dots ('10.11.12', '5.6', etc)
+   */
+  getOSVersion() {
+    return this.getOS().version;
+  }
+
+  /**
+   * Get parsed platform
+   * @return {{}}
+   */
+  getPlatform() {
+    if (this.parsedResult.platform) {
+      return this.parsedResult.platform;
+    }
+
+    return this.parsePlatform();
+  }
+
+  /**
+   * Get platform name
+   * @param {Boolean} [toLowerCase=false]
+   * @return {*}
+   */
+  getPlatformType(toLowerCase = false) {
+    const { type } = this.getPlatform();
+
+    if (toLowerCase) {
+      return String(type).toLowerCase() || '';
+    }
+
+    return type || '';
+  }
+
+  /**
+   * Get parsed platform
+   * @return {{}}
+   */
+  parsePlatform() {
+    this.parsedResult.platform = {};
+
+    const platform = Utils.find(platformParsersList, (_platform) => {
+      if (typeof _platform.test === 'function') {
+        return _platform.test(this);
+      }
+
+      if (Array.isArray(_platform.test)) {
+        return _platform.test.some(condition => this.test(condition));
+      }
+
+      throw new Error("Browser's test function is not valid");
+    });
+
+    if (platform) {
+      this.parsedResult.platform = platform.describe(this.getUA());
+    }
+
+    return this.parsedResult.platform;
+  }
+
+  /**
+   * Get parsed engine
+   * @return {{}}
+   */
+  getEngine() {
+    if (this.parsedResult.engine) {
+      return this.parsedResult.engine;
+    }
+
+    return this.parseEngine();
+  }
+
+  /**
+   * Get engines's name
+   * @return {String} Engines's name or an empty string
+   *
+   * @public
+   */
+  getEngineName(toLowerCase) {
+    if (toLowerCase) {
+      return String(this.getEngine().name).toLowerCase() || '';
+    }
+    return this.getEngine().name || '';
+  }
+
+  /**
+   * Get parsed platform
+   * @return {{}}
+   */
+  parseEngine() {
+    this.parsedResult.engine = {};
+
+    const engine = Utils.find(enginesParsersList, (_engine) => {
+      if (typeof _engine.test === 'function') {
+        return _engine.test(this);
+      }
+
+      if (Array.isArray(_engine.test)) {
+        return _engine.test.some(condition => this.test(condition));
+      }
+
+      throw new Error("Browser's test function is not valid");
+    });
+
+    if (engine) {
+      this.parsedResult.engine = engine.describe(this.getUA());
+    }
+
+    return this.parsedResult.engine;
+  }
+
+  /**
+   * Parse full information about the browser
+   * @returns {Parser}
+   */
+  parse() {
+    this.parseBrowser();
+    this.parseOS();
+    this.parsePlatform();
+    this.parseEngine();
+
+    return this;
+  }
+
+  /**
+   * Get parsed result
+   * @return {ParsedResult}
+   */
+  getResult() {
+    return Utils.assign({}, this.parsedResult);
+  }
+
+  /**
+   * Check if parsed browser matches certain conditions
+   *
+   * @param {Object} checkTree It's one or two layered object,
+   * which can include a platform or an OS on the first layer
+   * and should have browsers specs on the bottom-laying layer
+   *
+   * @returns {Boolean|undefined} Whether the browser satisfies the set conditions or not.
+   * Returns `undefined` when the browser is no described in the checkTree object.
+   *
+   * @example
+   * const browser = Bowser.getParser(window.navigator.userAgent);
+   * if (browser.satisfies({chrome: '>118.01.1322' }))
+   * // or with os
+   * if (browser.satisfies({windows: { chrome: '>118.01.1322' } }))
+   * // or with platforms
+   * if (browser.satisfies({desktop: { chrome: '>118.01.1322' } }))
+   */
+  satisfies(checkTree) {
+    const platformsAndOSes = {};
+    let platformsAndOSCounter = 0;
+    const browsers = {};
+    let browsersCounter = 0;
+
+    const allDefinitions = Object.keys(checkTree);
+
+    allDefinitions.forEach((key) => {
+      const currentDefinition = checkTree[key];
+      if (typeof currentDefinition === 'string') {
+        browsers[key] = currentDefinition;
+        browsersCounter += 1;
+      } else if (typeof currentDefinition === 'object') {
+        platformsAndOSes[key] = currentDefinition;
+        platformsAndOSCounter += 1;
+      }
+    });
+
+    if (platformsAndOSCounter > 0) {
+      const platformsAndOSNames = Object.keys(platformsAndOSes);
+      const OSMatchingDefinition = Utils.find(platformsAndOSNames, name => (this.isOS(name)));
+
+      if (OSMatchingDefinition) {
+        const osResult = this.satisfies(platformsAndOSes[OSMatchingDefinition]);
+
+        if (osResult !== void 0) {
+          return osResult;
+        }
+      }
+
+      const platformMatchingDefinition = Utils.find(
+        platformsAndOSNames,
+        name => (this.isPlatform(name)),
+      );
+      if (platformMatchingDefinition) {
+        const platformResult = this.satisfies(platformsAndOSes[platformMatchingDefinition]);
+
+        if (platformResult !== void 0) {
+          return platformResult;
+        }
+      }
+    }
+
+    if (browsersCounter > 0) {
+      const browserNames = Object.keys(browsers);
+      const matchingDefinition = Utils.find(browserNames, name => (this.isBrowser(name, true)));
+
+      if (matchingDefinition !== void 0) {
+        return this.compareVersion(browsers[matchingDefinition]);
+      }
+    }
+
+    return undefined;
+  }
+
+  /**
+   * Check if the browser name equals the passed string
+   * @param {string} browserName The string to compare with the browser name
+   * @param [includingAlias=false] The flag showing whether alias will be included into comparison
+   * @returns {boolean}
+   */
+  isBrowser(browserName, includingAlias = false) {
+    const defaultBrowserName = this.getBrowserName().toLowerCase();
+    let browserNameLower = browserName.toLowerCase();
+    const alias = Utils.getBrowserTypeByAlias(browserNameLower);
+
+    if (includingAlias && alias) {
+      browserNameLower = alias.toLowerCase();
+    }
+    return browserNameLower === defaultBrowserName;
+  }
+
+  compareVersion(version) {
+    let expectedResults = [0];
+    let comparableVersion = version;
+    let isLoose = false;
+
+    const currentBrowserVersion = this.getBrowserVersion();
+
+    if (typeof currentBrowserVersion !== 'string') {
+      return void 0;
+    }
+
+    if (version[0] === '>' || version[0] === '<') {
+      comparableVersion = version.substr(1);
+      if (version[1] === '=') {
+        isLoose = true;
+        comparableVersion = version.substr(2);
+      } else {
+        expectedResults = [];
+      }
+      if (version[0] === '>') {
+        expectedResults.push(1);
+      } else {
+        expectedResults.push(-1);
+      }
+    } else if (version[0] === '=') {
+      comparableVersion = version.substr(1);
+    } else if (version[0] === '~') {
+      isLoose = true;
+      comparableVersion = version.substr(1);
+    }
+
+    return expectedResults.indexOf(
+      Utils.compareVersions(currentBrowserVersion, comparableVersion, isLoose),
+    ) > -1;
+  }
+
+  /**
+   * Check if the OS name equals the passed string
+   * @param {string} osName The string to compare with the OS name
+   * @returns {boolean}
+   */
+  isOS(osName) {
+    return this.getOSName(true) === String(osName).toLowerCase();
+  }
+
+  /**
+   * Check if the platform type equals the passed string
+   * @param {string} platformType The string to compare with the platform type
+   * @returns {boolean}
+   */
+  isPlatform(platformType) {
+    return this.getPlatformType(true) === String(platformType).toLowerCase();
+  }
+
+  /**
+   * Check if the engine name equals the passed string
+   * @param {string} engineName The string to compare with the engine name
+   * @returns {boolean}
+   */
+  isEngine(engineName) {
+    return this.getEngineName(true) === String(engineName).toLowerCase();
+  }
+
+  /**
+   * Is anything? Check if the browser is called "anything",
+   * the OS called "anything" or the platform called "anything"
+   * @param {String} anything
+   * @param [includingAlias=false] The flag showing whether alias will be included into comparison
+   * @returns {Boolean}
+   */
+  is(anything, includingAlias = false) {
+    return this.isBrowser(anything, includingAlias) || this.isOS(anything)
+      || this.isPlatform(anything);
+  }
+
+  /**
+   * Check if any of the given values satisfies this.is(anything)
+   * @param {String[]} anythings
+   * @returns {Boolean}
+   */
+  some(anythings = []) {
+    return anythings.some(anything => this.is(anything));
+  }
+}
+
+export default Parser;

backend/node_modules/bowser/src/utils.js

@@ -0,0 +1,327 @@
+import { BROWSER_MAP, BROWSER_ALIASES_MAP } from './constants.js';
+
+export default class Utils {
+  /**
+   * Get first matched item for a string
+   * @param {RegExp} regexp
+   * @param {String} ua
+   * @return {Array|{index: number, input: string}|*|boolean|string}
+   */
+  static getFirstMatch(regexp, ua) {
+    const match = ua.match(regexp);
+    return (match && match.length > 0 && match[1]) || '';
+  }
+
+  /**
+   * Get second matched item for a string
+   * @param regexp
+   * @param {String} ua
+   * @return {Array|{index: number, input: string}|*|boolean|string}
+   */
+  static getSecondMatch(regexp, ua) {
+    const match = ua.match(regexp);
+    return (match && match.length > 1 && match[2]) || '';
+  }
+
+  /**
+   * Match a regexp and return a constant or undefined
+   * @param {RegExp} regexp
+   * @param {String} ua
+   * @param {*} _const Any const that will be returned if regexp matches the string
+   * @return {*}
+   */
+  static matchAndReturnConst(regexp, ua, _const) {
+    if (regexp.test(ua)) {
+      return _const;
+    }
+    return void (0);
+  }
+
+  static getWindowsVersionName(version) {
+    switch (version) {
+      case 'NT': return 'NT';
+      case 'XP': return 'XP';
+      case 'NT 5.0': return '2000';
+      case 'NT 5.1': return 'XP';
+      case 'NT 5.2': return '2003';
+      case 'NT 6.0': return 'Vista';
+      case 'NT 6.1': return '7';
+      case 'NT 6.2': return '8';
+      case 'NT 6.3': return '8.1';
+      case 'NT 10.0': return '10';
+      default: return undefined;
+    }
+  }
+
+  /**
+   * Get macOS version name
+   *    10.5 - Leopard
+   *    10.6 - Snow Leopard
+   *    10.7 - Lion
+   *    10.8 - Mountain Lion
+   *    10.9 - Mavericks
+   *    10.10 - Yosemite
+   *    10.11 - El Capitan
+   *    10.12 - Sierra
+   *    10.13 - High Sierra
+   *    10.14 - Mojave
+   *    10.15 - Catalina
+   *    11 - Big Sur
+   *    12 - Monterey
+   *    13 - Ventura
+   *    14 - Sonoma
+   *    15 - Sequoia
+   *
+   * @example
+   *   getMacOSVersionName("10.14") // 'Mojave'
+   *
+   * @param  {string} version
+   * @return {string} versionName
+   */
+  static getMacOSVersionName(version) {
+    const v = version.split('.').splice(0, 2).map(s => parseInt(s, 10) || 0);
+    v.push(0);
+    const major = v[0];
+    const minor = v[1];
+
+    if (major === 10) {
+      switch (minor) {
+        case 5: return 'Leopard';
+        case 6: return 'Snow Leopard';
+        case 7: return 'Lion';
+        case 8: return 'Mountain Lion';
+        case 9: return 'Mavericks';
+        case 10: return 'Yosemite';
+        case 11: return 'El Capitan';
+        case 12: return 'Sierra';
+        case 13: return 'High Sierra';
+        case 14: return 'Mojave';
+        case 15: return 'Catalina';
+        default: return undefined;
+      }
+    }
+
+    switch (major) {
+      case 11: return 'Big Sur';
+      case 12: return 'Monterey';
+      case 13: return 'Ventura';
+      case 14: return 'Sonoma';
+      case 15: return 'Sequoia';
+      default: return undefined;
+    }
+  }
+
+  /**
+   * Get Android version name
+   *    1.5 - Cupcake
+   *    1.6 - Donut
+   *    2.0 - Eclair
+   *    2.1 - Eclair
+   *    2.2 - Froyo
+   *    2.x - Gingerbread
+   *    3.x - Honeycomb
+   *    4.0 - Ice Cream Sandwich
+   *    4.1 - Jelly Bean
+   *    4.4 - KitKat
+   *    5.x - Lollipop
+   *    6.x - Marshmallow
+   *    7.x - Nougat
+   *    8.x - Oreo
+   *    9.x - Pie
+   *
+   * @example
+   *   getAndroidVersionName("7.0") // 'Nougat'
+   *
+   * @param  {string} version
+   * @return {string} versionName
+   */
+  static getAndroidVersionName(version) {
+    const v = version.split('.').splice(0, 2).map(s => parseInt(s, 10) || 0);
+    v.push(0);
+    if (v[0] === 1 && v[1] < 5) return undefined;
+    if (v[0] === 1 && v[1] < 6) return 'Cupcake';
+    if (v[0] === 1 && v[1] >= 6) return 'Donut';
+    if (v[0] === 2 && v[1] < 2) return 'Eclair';
+    if (v[0] === 2 && v[1] === 2) return 'Froyo';
+    if (v[0] === 2 && v[1] > 2) return 'Gingerbread';
+    if (v[0] === 3) return 'Honeycomb';
+    if (v[0] === 4 && v[1] < 1) return 'Ice Cream Sandwich';
+    if (v[0] === 4 && v[1] < 4) return 'Jelly Bean';
+    if (v[0] === 4 && v[1] >= 4) return 'KitKat';
+    if (v[0] === 5) return 'Lollipop';
+    if (v[0] === 6) return 'Marshmallow';
+    if (v[0] === 7) return 'Nougat';
+    if (v[0] === 8) return 'Oreo';
+    if (v[0] === 9) return 'Pie';
+    return undefined;
+  }
+
+  /**
+   * Get version precisions count
+   *
+   * @example
+   *   getVersionPrecision("1.10.3") // 3
+   *
+   * @param  {string} version
+   * @return {number}
+   */
+  static getVersionPrecision(version) {
+    return version.split('.').length;
+  }
+
+  /**
+   * Calculate browser version weight
+   *
+   * @example
+   *   compareVersions('1.10.2.1',  '1.8.2.1.90')    // 1
+   *   compareVersions('1.010.2.1', '1.09.2.1.90');  // 1
+   *   compareVersions('1.10.2.1',  '1.10.2.1');     // 0
+   *   compareVersions('1.10.2.1',  '1.0800.2');     // -1
+   *   compareVersions('1.10.2.1',  '1.10',  true);  // 0
+   *
+   * @param {String} versionA versions versions to compare
+   * @param {String} versionB versions versions to compare
+   * @param {boolean} [isLoose] enable loose comparison
+   * @return {Number} comparison result: -1 when versionA is lower,
+   * 1 when versionA is bigger, 0 when both equal
+   */
+  /* eslint consistent-return: 1 */
+  static compareVersions(versionA, versionB, isLoose = false) {
+    // 1) get common precision for both versions, for example for "10.0" and "9" it should be 2
+    const versionAPrecision = Utils.getVersionPrecision(versionA);
+    const versionBPrecision = Utils.getVersionPrecision(versionB);
+
+    let precision = Math.max(versionAPrecision, versionBPrecision);
+    let lastPrecision = 0;
+
+    const chunks = Utils.map([versionA, versionB], (version) => {
+      const delta = precision - Utils.getVersionPrecision(version);
+
+      // 2) "9" -> "9.0" (for precision = 2)
+      const _version = version + new Array(delta + 1).join('.0');
+
+      // 3) "9.0" -> ["000000000"", "000000009"]
+      return Utils.map(_version.split('.'), chunk => new Array(20 - chunk.length).join('0') + chunk).reverse();
+    });
+
+    // adjust precision for loose comparison
+    if (isLoose) {
+      lastPrecision = precision - Math.min(versionAPrecision, versionBPrecision);
+    }
+
+    // iterate in reverse order by reversed chunks array
+    precision -= 1;
+    while (precision >= lastPrecision) {
+      // 4) compare: "000000009" > "000000010" = false (but "9" > "10" = true)
+      if (chunks[0][precision] > chunks[1][precision]) {
+        return 1;
+      }
+
+      if (chunks[0][precision] === chunks[1][precision]) {
+        if (precision === lastPrecision) {
+          // all version chunks are same
+          return 0;
+        }
+
+        precision -= 1;
+      } else if (chunks[0][precision] < chunks[1][precision]) {
+        return -1;
+      }
+    }
+
+    return undefined;
+  }
+
+  /**
+   * Array::map polyfill
+   *
+   * @param  {Array} arr
+   * @param  {Function} iterator
+   * @return {Array}
+   */
+  static map(arr, iterator) {
+    const result = [];
+    let i;
+    if (Array.prototype.map) {
+      return Array.prototype.map.call(arr, iterator);
+    }
+    for (i = 0; i < arr.length; i += 1) {
+      result.push(iterator(arr[i]));
+    }
+    return result;
+  }
+
+  /**
+   * Array::find polyfill
+   *
+   * @param  {Array} arr
+   * @param  {Function} predicate
+   * @return {Array}
+   */
+  static find(arr, predicate) {
+    let i;
+    let l;
+    if (Array.prototype.find) {
+      return Array.prototype.find.call(arr, predicate);
+    }
+    for (i = 0, l = arr.length; i < l; i += 1) {
+      const value = arr[i];
+      if (predicate(value, i)) {
+        return value;
+      }
+    }
+    return undefined;
+  }
+
+  /**
+   * Object::assign polyfill
+   *
+   * @param  {Object} obj
+   * @param  {Object} ...objs
+   * @return {Object}
+   */
+  static assign(obj, ...assigners) {
+    const result = obj;
+    let i;
+    let l;
+    if (Object.assign) {
+      return Object.assign(obj, ...assigners);
+    }
+    for (i = 0, l = assigners.length; i < l; i += 1) {
+      const assigner = assigners[i];
+      if (typeof assigner === 'object' && assigner !== null) {
+        const keys = Object.keys(assigner);
+        keys.forEach((key) => {
+          result[key] = assigner[key];
+        });
+      }
+    }
+    return obj;
+  }
+
+  /**
+   * Get short version/alias for a browser name
+   *
+   * @example
+   *   getBrowserAlias('Microsoft Edge') // edge
+   *
+   * @param  {string} browserName
+   * @return {string}
+   */
+  static getBrowserAlias(browserName) {
+    return BROWSER_ALIASES_MAP[browserName];
+  }
+
+  /**
+   * Get browser name for a short version/alias
+   *
+   * @example
+   *   getBrowserTypeByAlias('edge') // Microsoft Edge
+   *
+   * @param  {string} browserAlias
+   * @return {string}
+   */
+  static getBrowserTypeByAlias(browserAlias) {
+    return BROWSER_MAP[browserAlias] || '';
+  }
+}