Posts a photo to a users profile, creating a gallery where needed.

uploadPhotoToFacebook.js

/*global FB, alert, console */

//Usage

// uploadPhotoToFacebook({
//   caption: 'A Picture',
//   url: 'http://lorempixel.com/400/300/',
//   album: 'JS API',
//   album_description: "An album of pictures",
//   onSuccess: function(){
//     alert('hooray');
//   },
//   onFailure: function(){
//     alert('oh no!');
//   }
// });


function uploadPhotoToFacebook(params) {
  "use strict";
  var self = {}, album_id = false, authResponse;

  self.postPhoto = function () {
    //Post Photo in album
    FB.api('/' + album_id + '/photos', 'post', {
      message: params.caption,
      url: params.url
    },
      function (response) {
        if (!response || response.error) {
          if (params.onFailure) {
            params.onFailure();
          }
        } else {
          if (params.onSuccess) {
            params.onSuccess(response.id);
          }
        }
      });
  };

  FB.login(function (response) {
    if (response.authResponse) {
      authResponse = response.authResponse;
      //Check for existing albums
      FB.api('/me/albums?access_token=' + authResponse.accessToken, function (response) {
        var album;
        for (album in response.data) {
          if (response.data[album].name === params.album) {
            album_id = response.data[album].id;
          }
        }
        if (album_id) {
          self.postPhoto();
        } else {
          //Create Album
          FB.api('/me/albums?access_token=' + authResponse.accessToken, 'post',
            {
              name: params.album,
              message: params.album_description || ""
            },
            function (response) {
              album_id = response.id;
              self.postPhoto();
            });
        }
      });
    }
  }, {scope: 'publish_stream, user_photos'});
}