/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const Cc = Components.classes;
const Ci = Components.interfaces;

Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");

function debug(msg) {
  //dump("B2GAboutRedirector: " + msg + "\n");
}

function netErrorURL() {
  let uri = "app://system.gaiamobile.org/net_error.html";
  try {
    uri = Services.prefs.getCharPref("b2g.neterror.url");
  } catch(e) {}
  return uri;
}

let modules = {
  certerror: {
    uri: "chrome://browser/content/aboutCertError.xhtml",
    privileged: false,
    hide: true
  },
  neterror: {
    uri: netErrorURL(),
    privileged: false,
    hide: true
  }
};

function B2GAboutRedirector() {}
B2GAboutRedirector.prototype = {
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIAboutModule]),
  classID: Components.ID("{920400b1-cf8f-4760-a9c4-441417b15134}"),

  _getModuleInfo: function (aURI) {
    let moduleName = aURI.path.replace(/[?#].*/, "").toLowerCase();
    return modules[moduleName];
  },

  // nsIAboutModule
  getURIFlags: function(aURI) {
    let flags;
    let moduleInfo = this._getModuleInfo(aURI);
    if (moduleInfo.hide)
      flags = Ci.nsIAboutModule.HIDE_FROM_ABOUTABOUT;

    return flags | Ci.nsIAboutModule.ALLOW_SCRIPT;
  },

  newChannel: function(aURI) {
    let moduleInfo = this._getModuleInfo(aURI);

    var ios = Cc["@mozilla.org/network/io-service;1"].
              getService(Ci.nsIIOService);

    var channel = ios.newChannel(moduleInfo.uri, null, null);

    if (!moduleInfo.privileged) {
      // Setting the owner to null means that we'll go through the normal
      // path in GetChannelPrincipal and create a codebase principal based
      // on the channel's originalURI
      channel.owner = null;
    }

    channel.originalURI = aURI;

    return channel;
  }
};

this.NSGetFactory = XPCOMUtils.generateNSGetFactory([B2GAboutRedirector]);