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/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
'use strict';
var UserAgentData = require("./UserAgentData");
var VersionRange = require("./VersionRange");
var mapObject = require("./mapObject");
var memoizeStringOnly = require("./memoizeStringOnly");
/**
* Checks to see whether `name` and `version` satisfy `query`.
*
* @param {string} name Name of the browser, device, engine or platform
* @param {?string} version Version of the browser, engine or platform
* @param {string} query Query of form "Name [range expression]"
* @param {?function} normalizer Optional pre-processor for range expression
* @return {boolean}
*/
function compare(name, version, query, normalizer) {
// check for exact match with no version
if (name === query) {
return true;
} // check for non-matching names
if (!query.startsWith(name)) {
return false;
} // full comparison with version
var range = query.slice(name.length);
if (version) {
range = normalizer ? normalizer(range) : range;
return VersionRange.contains(range, version);
}
return false;
}
/**
* Normalizes `version` by stripping any "NT" prefix, but only on the Windows
* platform.
*
* Mimics the stripping performed by the `UserAgentWindowsPlatform` PHP class.
*
* @param {string} version
* @return {string}
*/
function normalizePlatformVersion(version) {
if (UserAgentData.platformName === 'Windows') {
return version.replace(/^\s*NT/, '');
}
return version;
}
/**
* Provides client-side access to the authoritative PHP-generated User Agent
* information supplied by the server.
*/
var UserAgent = {
/**
* Check if the User Agent browser matches `query`.
*
* `query` should be a string like "Chrome" or "Chrome > 33".
*
* Valid browser names include:
*
* - ACCESS NetFront
* - AOL
* - Amazon Silk
* - Android
* - BlackBerry
* - BlackBerry PlayBook
* - Chrome
* - Chrome for iOS
* - Chrome frame
* - Facebook PHP SDK
* - Facebook for iOS
* - Firefox
* - IE
* - IE Mobile
* - Mobile Safari
* - Motorola Internet Browser
* - Nokia
* - Openwave Mobile Browser
* - Opera
* - Opera Mini
* - Opera Mobile
* - Safari
* - UIWebView
* - Unknown
* - webOS
* - etc...
*
* An authoritative list can be found in the PHP `BrowserDetector` class and
* related classes in the same file (see calls to `new UserAgentBrowser` here:
* https://fburl.com/50728104).
*
* @note Function results are memoized
*
* @param {string} query Query of the form "Name [range expression]"
* @return {boolean}
*/
isBrowser: function isBrowser(query) {
return compare(UserAgentData.browserName, UserAgentData.browserFullVersion, query);
},
/**
* Check if the User Agent browser uses a 32 or 64 bit architecture.
*
* @note Function results are memoized
*
* @param {string} query Query of the form "32" or "64".
* @return {boolean}
*/
isBrowserArchitecture: function isBrowserArchitecture(query) {
return compare(UserAgentData.browserArchitecture, null, query);
},
/**
* Check if the User Agent device matches `query`.
*
* `query` should be a string like "iPhone" or "iPad".
*
* Valid device names include:
*
* - Kindle
* - Kindle Fire
* - Unknown
* - iPad
* - iPhone
* - iPod
* - etc...
*
* An authoritative list can be found in the PHP `DeviceDetector` class and
* related classes in the same file (see calls to `new UserAgentDevice` here:
* https://fburl.com/50728332).
*
* @note Function results are memoized
*
* @param {string} query Query of the form "Name"
* @return {boolean}
*/
isDevice: function isDevice(query) {
return compare(UserAgentData.deviceName, null, query);
},
/**
* Check if the User Agent rendering engine matches `query`.
*
* `query` should be a string like "WebKit" or "WebKit >= 537".
*
* Valid engine names include:
*
* - Gecko
* - Presto
* - Trident
* - WebKit
* - etc...
*
* An authoritative list can be found in the PHP `RenderingEngineDetector`
* class related classes in the same file (see calls to `new
* UserAgentRenderingEngine` here: https://fburl.com/50728617).
*
* @note Function results are memoized
*
* @param {string} query Query of the form "Name [range expression]"
* @return {boolean}
*/
isEngine: function isEngine(query) {
return compare(UserAgentData.engineName, UserAgentData.engineVersion, query);
},
/**
* Check if the User Agent platform matches `query`.
*
* `query` should be a string like "Windows" or "iOS 5 - 6".
*
* Valid platform names include:
*
* - Android
* - BlackBerry OS
* - Java ME
* - Linux
* - Mac OS X
* - Mac OS X Calendar
* - Mac OS X Internet Account
* - Symbian
* - SymbianOS
* - Windows
* - Windows Mobile
* - Windows Phone
* - iOS
* - iOS Facebook Integration Account
* - iOS Facebook Social Sharing UI
* - webOS
* - Chrome OS
* - etc...
*
* An authoritative list can be found in the PHP `PlatformDetector` class and
* related classes in the same file (see calls to `new UserAgentPlatform`
* here: https://fburl.com/50729226).
*
* @note Function results are memoized
*
* @param {string} query Query of the form "Name [range expression]"
* @return {boolean}
*/
isPlatform: function isPlatform(query) {
return compare(UserAgentData.platformName, UserAgentData.platformFullVersion, query, normalizePlatformVersion);
},
/**
* Check if the User Agent platform is a 32 or 64 bit architecture.
*
* @note Function results are memoized
*
* @param {string} query Query of the form "32" or "64".
* @return {boolean}
*/
isPlatformArchitecture: function isPlatformArchitecture(query) {
return compare(UserAgentData.platformArchitecture, null, query);
}
};
module.exports = mapObject(UserAgent, memoizeStringOnly);
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