Added method to check if user follows a playlist #16

README.md

@@ -334,6 +334,8 @@ Spotify.reorderPlaylistTracks('1176458919', '2TkWjGCu8jurholsfdWtG4', {
   range_start: 8,
   range_length: 5,
   insert_before: 0
+}).then(function (data) {
+  console.log(data);
 });
 ```
 
@@ -477,6 +479,21 @@ Spotify.unfollowPlaylist('jmperezperez', '2v3iNvBX8Ay1Gt2uXtUKUT').then(function
 });
 ```
 
+####Check if Users Follow a Playlist
+Check to see if one or more Spotify users are following a specified playlist.Following a playlist can be done publicly or privately. Checking if a user publicly follows a playlist doesn't require any scopes; if the user is publicly following the playlist, this endpoint returns true.
+
+Checking if the user is privately following a playlist is only possible for the current user when that user has granted access to the ```playlist-read-private``` scope.
+```javascript
+Spotify.playlistFollowingContains('owner_id', 'playlist_id', 'comma separated string or array of user ids');
+```
+Example:
+```javascript
+Spotify.playlistFollowingContains('jmperezperez', '2v3iNvBX8Ay1Gt2uXtUKUT', 'possan,elogain').then(function (data) {
+  console.log(data);
+});
+```
+
+
 ###User Profiles
 User needs to be logged in to gain access to user profiles
 

src/angular-spotify.js

@@ -406,6 +406,14 @@
           });
         };
 
+        NgSpotify.prototype.playlistFollowingContains = function(userId, playlistId, ids) {
+          return this.api('/users/' + userId + '/playlists/' + playlistId + '/followers/contains', 'GET', {
+            ids: ids.toString()
+          }, null, {
+            'Authorization': 'Bearer ' + this.authToken
+          });
+        };
+
         /**
           ====================== Login =====================
          */

test/spec/angular-spotify.spec.js

@@ -251,6 +251,10 @@ describe('angular-spotify', function () {
       expect(Spotify.unfollowPlaylist).toBeDefined();
     });
 
+    it('should have a method playlistFollowingContains()', function () {
+      expect(Spotify.playlistFollowingContains).toBeDefined();
+    });
+
 
     describe('Spotify.api', function () {
       var $httpBackend;
@@ -1655,6 +1659,38 @@ describe('angular-spotify', function () {
           });
         });
       });
+
+      describe('Spotify.playlistFollowingContains', function () {
+        it('should call the correct URL', function () {
+          spyOn(Spotify, 'api');
+
+          Spotify.setAuthToken('TESTING');
+
+          Spotify.playlistFollowingContains('jmperezperez', '2v3iNvBX8Ay1Gt2uXtUKUT', 'possan,elogain');
+
+          expect(Spotify.api).toHaveBeenCalled();
+          expect(Spotify.api).toHaveBeenCalledWith('/users/jmperezperez/playlists/2v3iNvBX8Ay1Gt2uXtUKUT/followers/contains', 'GET', {
+            ids: 'possan,elogain'
+          }, null, {
+            'Authorization': 'Bearer TESTING'
+          });
+        });
+
+        it('should be able to be called with an array of users', function () {
+          spyOn(Spotify, 'api');
+
+          Spotify.setAuthToken('TESTING');
+
+          Spotify.playlistFollowingContains('jmperezperez', '2v3iNvBX8Ay1Gt2uXtUKUT', ['possan','elogain']);
+
+          expect(Spotify.api).toHaveBeenCalled();
+          expect(Spotify.api).toHaveBeenCalledWith('/users/jmperezperez/playlists/2v3iNvBX8Ay1Gt2uXtUKUT/followers/contains', 'GET', {
+            ids: 'possan,elogain'
+          }, null, {
+            'Authorization': 'Bearer TESTING'
+          });
+        });
+      });
     });
 
   });