text: // Copyright, 2013-2016, by Tomas Korcak. <korczis@gmail.com>
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  import fs from 'fs';
  import path from 'path';
  
  /**
   * Generates GUID - Globaly Unique Identifier
   * @returns {string} String with GUID
   */
  export function guid() {
    function s4() {
      return Math.floor((1 + Math.random()) * 0x10000)
        .toString(16)
        .substring(1);
    }
  
    return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
      s4() + '-' + s4() + s4() + s4();
  }
  
  export function loadProcessors() {
    return new Promise((resolve, reject) => {
      const dir = path.join(__dirname, '..', '..', 'node_modules');
      fs.readdir(dir, (err, items) => {
        if (err) {
          return reject(err);
        }
  
        const res = {};
  
        const prefix = 'microcrawler-crawler-';
        for (let i = 0; i < items.length; i++) {
          const item = items[i];
          if (item.indexOf(prefix) !== 0) {
            continue;
          }
  
          const name = item.replace(prefix, '');
          const pkg = require(`${item}/package.json`);
  
          const crawler = pkg.crawler || {};
          const processors = crawler.processors || {};
          const processorNames = Object.keys(processors);
          for (let j = 0; j < processorNames.length; j++) {
            const processorName = processorNames[j];
            const processorPath = path.join(dir, item, processors[processorName]);
            const processor = require(processorPath);
  
            const fullName = `${name}.${processorName}`;
            res[fullName] = {
              crawler: name,
              name: processorName,
              fullName,
              path: processorPath,
              processor,
              meta: pkg.crawler
            };
          }
        }
  
        resolve(res);
      });
    });
  }
  