bal-util/es2015/lib/compare.js

Common utility functions for Node.js used and maintained by Benjamin Lupton

'use strict';

// Generated by CoffeeScript 2.3.1
// Import
var balUtilCompare, balUtilPaths;

balUtilCompare = null;

balUtilPaths = require('./paths');

// =====================================
// Compare
balUtilCompare = {
  // Version Compare
  // http://phpjs.org/functions/version_compare
  // MIT Licensed http://phpjs.org/pages/license
  versionCompare: function versionCompare(v1, operator, v2) {
    var compare, i, j, numVersion, prepVersion, ref, result, vm, x;
    i = x = compare = 0;
    vm = {
      'dev': -6,
      'alpha': -5,
      'a': -5,
      'beta': -4,
      'b': -4,
      'RC': -3,
      'rc': -3,
      '#': -2,
      'p': -1,
      'pl': -1
    };
    prepVersion = function prepVersion(v) {
      v = ('' + v).replace(/[_\-+]/g, '.');
      v = v.replace(/([^.\d]+)/g, '.$1.').replace(/\.{2,}/g, '.');
      if (!v.length) {
        return [-8];
      } else {
        return v.split('.');
      }
    };
    numVersion = function numVersion(v) {
      if (!v) {
        return 0;
      } else {
        if (isNaN(v)) {
          return vm[v] || -7;
        } else {
          return parseInt(v, 10);
        }
      }
    };
    v1 = prepVersion(v1);
    v2 = prepVersion(v2);
    x = Math.max(v1.length, v2.length);
    for (i = j = 0, ref = x; 0 <= ref ? j <= ref : j >= ref; i = 0 <= ref ? ++j : --j) {
      if (v1[i] === v2[i]) {
        continue;
      }
      v1[i] = numVersion(v1[i]);
      v2[i] = numVersion(v2[i]);
      if (v1[i] < v2[i]) {
        compare = -1;
        break;
      } else if (v1[i] > v2[i]) {
        compare = 1;
        break;
      }
    }
    if (!operator) {
      return compare;
    }
    result = function () {
      switch (operator) {
        case '>':
        case 'gt':
          return compare > 0;
        case '>=':
        case 'ge':
          return compare >= 0;
        case '<=':
        case 'le':
          return compare <= 0;
        case '==':
        case '=':
        case 'eq':
        case 'is':
          return compare === 0;
        case '<>':
        case '!=':
        case 'ne':
        case 'isnt':
          return compare !== 0;
        case '':
        case '<':
        case 'lt':
          return compare < 0;
        default:
          return null;
      }
    }();
    // Return result
    return result;
  },
  // Compare Package
  packageCompare: function packageCompare(_ref) {
    var local = _ref.local,
        remote = _ref.remote,
        newVersionCallback = _ref.newVersionCallback,
        sameVersionCallback = _ref.sameVersionCallback,
        oldVersionCallback = _ref.oldVersionCallback,
        errorCallback = _ref.errorCallback;

    var details, runCompare;
    // Prepare
    details = {};
    // Handler
    runCompare = function runCompare() {
      if (balUtilCompare.versionCompare(details.local.version, '<', details.remote.version)) {
        return typeof newVersionCallback === "function" ? newVersionCallback(details) : void 0;
      } else if (balUtilCompare.versionCompare(details.local.version, '==', details.remote.version)) {
        return typeof sameVersionCallback === "function" ? sameVersionCallback(details) : void 0;
      } else if (balUtilCompare.versionCompare(details.local.version, '>', details.remote.version)) {
        return typeof oldVersionCallback === "function" ? oldVersionCallback(details) : void 0;
      }
    };
    // Read local
    balUtilPaths.readPath(local, function (err, data) {
      var dataStr;
      if (err) {
        return typeof errorCallback === "function" ? errorCallback(err, data) : void 0;
      }
      try {
        dataStr = data.toString();
        details.local = JSON.parse(dataStr);
      } catch (error) {
        err = error;
        return typeof errorCallback === "function" ? errorCallback(err, data) : void 0;
      }
      // Read remote
      return balUtilPaths.readPath(remote, function (err, data) {
        if (err) {
          return typeof errorCallback === "function" ? errorCallback(err, data) : void 0;
        }
        try {
          dataStr = data.toString();
          details.remote = JSON.parse(dataStr);
        } catch (error) {
          err = error;
          return typeof errorCallback === "function" ? errorCallback(err, data) : void 0;
        }
        // Compare
        return runCompare();
      });
    });
    return this;
  }
};

// =====================================
// Export
module.exports = balUtilCompare;