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 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 - ?
*
* @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';
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;
}
}
}
/**
* 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;
}
}
module.exports = Utils;