scourjs/lib/build_extensions.js

'use strict';

var map = require('../utilities/map');

/**
 * Internal: builds extensions based on parameters passed onto `.use()`.
 *
 *     buildExtensions({ 'users.*': props })
 *     // => [ /^users\.[^.]+$/, props ]
 */

module.exports = function buildExtensions(keypath, extensions) {
  var prefix = keypath.length ? keypath.join('.') + '.' : '';
  return map(extensions, function (properties, keypath) {
    keypath = (prefix + keypath).replace(/\./g, '\\.').replace(/\*\*/g, '::all::').replace(/\*/g, '::any::').replace(/::all::/g, '.*').replace(/::any::/g, '[^\.]+');

    keypath = new RegExp('^' + keypath + '$');
    return [keypath, properties];
  });
};