manifoldjs-chrome/lib/platform.js

ManifoldJS Chrome OS Platform

'use strict';

var path = require('path'),
    util = require('util'),
    Q = require('q');
    
var manifoldjsLib = require('manifoldjs-lib');

var CustomError = manifoldjsLib.CustomError,
    PlatformBase = manifoldjsLib.PlatformBase,
    manifestTools = manifoldjsLib.manifestTools,
    fileTools = manifoldjsLib.fileTools;

var constants = require('./constants'),
    manifest = require('./manifest');
   
function Platform (packageName, platforms) {

  var self = this;

  PlatformBase.call(this, constants.platform.id, constants.platform.name, packageName, __dirname);

  // save platform list
  self.platforms = platforms;

  // override create function
  self.create = function (w3cManifestInfo, rootDir, options, callback) {
    if (w3cManifestInfo.format !== manifoldjsLib.constants.BASE_MANIFEST_FORMAT) {
      return Q.reject(new CustomError('The \'' + w3cManifestInfo.format + '\' manifest format is not valid for this platform.'));
    }

    self.info('Generating the ' + constants.platform.name + ' app...');
    
    var platformDir = path.join(rootDir, constants.platform.id);
    
    // convert the W3C manifest to a platform-specific manifest
    var platformManifestInfo;
    return manifest.convertFromBase(w3cManifestInfo)
      // if the platform dir doesn't exist, create it
      .then(function (manifestInfo) {
        platformManifestInfo = manifestInfo;         
        self.debug('Creating the ' + constants.platform.name + ' app folder...');
        return fileTools.mkdirp(platformDir);
      })
      // download icons to the app's folder
      .then(function () {
        return self.downloadIcons(platformManifestInfo.content, w3cManifestInfo.content.start_url, platformDir);
      })
      // copy the documentation
      .then(function () {
        return self.copyDocumentation(platformDir);
      })      
      // write generation info (telemetry)
      .then(function () {
        return self.writeGenerationInfo(w3cManifestInfo, platformDir);
      })
      // persist the platform-specific manifest
      .then(function () {
        self.debug('Copying the ' + constants.platform.name + ' manifest to the app folder...');
        var manifestFilePath = path.join(platformDir, 'manifest.json');
        return manifestTools.writeToFile(platformManifestInfo, manifestFilePath);
      })
      .nodeify(callback);
  };
}

util.inherits(Platform, PlatformBase);

module.exports = Platform;