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omichelsen/compare-versions

Compare semver version strings to find which is greater, equal or lesser.

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greasyfork.org/scripts/372057/627717/omichelsencompare-versions.js 

// ==UserScript==
// @name         omichelsen/compare-versions
// @namespace    https://github.com/omichelsen/compare-versions
// @version      undefind
// @description  Compare semver version strings to find which is greater, equal or lesser.
// @author       omichelsen
// @license      MIT
// ==/UserScript==

/* global define */
(function (root, factory) {
  /* istanbul ignore next */
  if (typeof define === 'function' && define.amd) {
    define([], factory);
  } else if (typeof exports === 'object') {
    module.exports = factory();
  } else {
    root.compareVersions = factory();
  }
}(this, function () {

  var semver = /^v?(?:\d+)(\.(?:[x*]|\d+)(\.(?:[x*]|\d+)(\.(?:[x*]|\d+))?(?:-[\da-z\-]+(?:\.[\da-z\-]+)*)?(?:\+[\da-z\-]+(?:\.[\da-z\-]+)*)?)?)?$/i;

  function indexOrEnd(str, q) {
    return str.indexOf(q) === -1 ? str.length : str.indexOf(q);
  }

  function split(v) {
    var c = v.replace(/^v/, '').replace(/\+.*$/, '');
    var patchIndex = indexOrEnd(c, '-');
    var arr = c.substring(0, patchIndex).split('.');
    arr.push(c.substring(patchIndex + 1));
    return arr;
  }

  function tryParse(v) {
    return isNaN(Number(v)) ? v : Number(v);
  }

  function validate(version) {
    if (typeof version !== 'string') {
      throw new TypeError('Invalid argument expected string');
    }
    if (!semver.test(version)) {
      throw new Error('Invalid argument not valid semver (\''+version+'\' received)');
    }
  }

  return function compareVersions(v1, v2) {
    [v1, v2].forEach(validate);

    var s1 = split(v1);
    var s2 = split(v2);

    for (var i = 0; i < Math.max(s1.length - 1, s2.length - 1); i++) {
      var n1 = parseInt(s1[i] || 0, 10);
      var n2 = parseInt(s2[i] || 0, 10);

      if (n1 > n2) return 1;
      if (n2 > n1) return -1;
    }

    var sp1 = s1[s1.length - 1];
    var sp2 = s2[s2.length - 1];

    if (sp1 && sp2) {
      var p1 = sp1.split('.').map(tryParse);
      var p2 = sp2.split('.').map(tryParse);

      for (i = 0; i < Math.max(p1.length, p2.length); i++) {
        if (p1[i] === undefined || typeof p2[i] === 'string' && typeof p1[i] === 'number') return -1;
        if (p2[i] === undefined || typeof p1[i] === 'string' && typeof p2[i] === 'number') return 1;

        if (p1[i] > p2[i]) return 1;
        if (p2[i] > p1[i]) return -1;
      }
    } else if (sp1 || sp2) {
      return sp1 ? -1 : 1;
    }

    return 0;
  };

}));