gistfile1.txt

// Copyright (c) 2014 Intel Corporation. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

let IsolatedFileSystem = requireNative('isolated_file_system');

let listeners = {};
function addMessageListener(fn) {
  var uid = new Date().getTime() + (parseInt(Math.random() * 100)).toString();
  listeners[uid] = fn;
  return uid;
}

function removeMessageListener(uid) {
  delete listeners[uid];
}

extension.setMessageListener(function(msg) {
  var json = JSON.parse(msg);
  if (json.uid && listeners[uid]) {
    listeners[uid](json);
  }
});

function sendMessage(message) {
  return new Promise((resolve, reject) => {
    message.uid = addMessageListener(event => {
      removeMessageListener(message.uid);
      if (event.data.error) {
        reject(event.data.error);
      } else {
        resolve(event.data);
      }
    });
 
    extension.postMessage(message);
  });
}

class NativeFileSystem {
  constructor() { 
  }
  
  requestNativeFileSystem(path, success, error) {
    sendMessage({ 
      data: {
        cmd: "requestNativeFileSystem",
        virtual_root: path
      }
    }).then(data => { 
      let fs = IsolatedFileSystem.getIsolatedFileSystem(data.file_system_id);
      success(fs);
    }).catch(err => {
      error(err);
    });
  }
  
  getDirectoryList() {
    extension.internal.sendSyncMessage("get");
  }
  
  getRealPath(virtual_root) {
    var _msg = {
      cmd : "getRealPath",
      path : virtual_root
    }
    return extension.internal.sendSyncMessage(_msg);
  }
  
}

exports = new NativeFileSystem();