text: 'use strict';
  
  var fs = require('fs-extra'),
      os = require('os'),
      path = require('path'),
      Promise = require('bluebird'),
      config = require('../config'),
      utils = require('../utils'),
      LocalFileStorage = require('../adapters/storage/LocalFileStorage'),
      remove = Promise.promisify(fs.remove);
  
  /**
   * @TODO: combine with loader.js?
   */
  class ThemeStorage extends LocalFileStorage {
      constructor() {
          super();
  
          this.storagePath = config.getContentPath('themes');
      }
  
      getTargetDir() {
          return this.storagePath;
      }
  
      serve(options) {
          var self = this;
  
          return function downloadTheme(req, res, next) {
              var themeName = options.name,
                  themePath = path.join(self.storagePath, themeName),
                  zipName = themeName + '.zip',
                  // store this in a unique temporary folder
                  zipBasePath = path.join(os.tmpdir(), utils.uid(10)),
                  zipPath = path.join(zipBasePath, zipName),
                  stream;
  
              Promise.promisify(fs.ensureDir)(zipBasePath)
                  .then(function () {
                      return Promise.promisify(utils.zipFolder)(themePath, zipPath);
                  })
                  .then(function (length) {
                      res.set({
                          'Content-disposition': 'attachment; filename={themeName}.zip'.replace('{themeName}', themeName),
                          'Content-Type': 'application/zip',
                          'Content-Length': length
                      });
  
                      stream = fs.createReadStream(zipPath);
                      stream.pipe(res);
                  })
                  .catch(function (err) {
                      next(err);
                  })
                  .finally(function () {
                      remove(zipBasePath);
                  });
          };
      }
  
      delete(fileName) {
          return remove(path.join(this.storagePath, fileName));
      }
  }
  
  module.exports = ThemeStorage;
  