1  /**
 2   * Archiver Vending
 3   *
 4   * @ignore
 5   * @license [MIT]{@link https://github.com/archiverjs/node-archiver/blob/master/LICENSE}
 6   * @copyright (c) 2012-2014 Chris Talkington, contributors.
 7   */
 8  var Archiver = require('./lib/core');
 9  
10  var formats = {};
11  
12  /**
13   * Dispenses a new Archiver instance.
14   *
15   * @constructor
16   * @param  {String} format The archive format to use.
17   * @param  {Object} options See [Archiver]{@link Archiver}
18   * @return {Archiver}
19   */
20  var vending = function(format, options) {
21    return vending.create(format, options);
22  };
23  
24  /**
25   * Creates a new Archiver instance.
26   *
27   * @param  {String} format The archive format to use.
28   * @param  {Object} options See [Archiver]{@link Archiver}
29   * @return {Archiver}
30   */
31  vending.create = function(format, options) {
32    if (formats[format]) {
33      var instance = new Archiver(format, options);
34      instance.setFormat(format);
35      instance.setModule(new formats[format](options));
36  
37      return instance;
38    } else {
39      throw new Error('create(' + format + '): format not registered');
40    }
41  };
42  
43  /**
44   * Registers a format for use with archiver.
45   *
46   * @param  {String} format The name of the format.
47   * @param  {Function} module The function for archiver to interact with.
48   * @return void
49   */
50  vending.registerFormat = function(format, module) {
51    if (formats[format]) {
52      throw new Error('register(' + format + '): format already registered');
53    }
54  
55    if (typeof module !== 'function') {
56      throw new Error('register(' + format + '): format module invalid');
57    }
58  
59    if (typeof module.prototype.append !== 'function' || typeof module.prototype.finalize !== 'function') {
60      throw new Error('register(' + format + '): format module missing methods');
61    }
62  
63    formats[format] = module;
64  };
65  
66  /**
67   * Check if the format is already registered.
68   * 
69   * @param {String} format the name of the format.
70   * @return boolean
71   */
72  vending.isRegisteredFormat = function (format) {
73    if (formats[format]) {
74      return true;
75    }
76    
77    return false;
78  };
79  
80  vending.registerFormat('zip', require('./lib/plugins/zip'));
81  vending.registerFormat('tar', require('./lib/plugins/tar'));
82  vending.registerFormat('json', require('./lib/plugins/json'));
83  
84  module.exports = vending;