From a4e6fc5a3965a595e8a775a0717eb91ff530ae2d Mon Sep 17 00:00:00 2001
From: Michael Thelin <thelinmichael@spotify.com>
Date: Thu, 24 Jul 2014 00:27:35 -0400
Subject: [PATCH] Add support for checking if a user's Your Music library
 contains a track

---
 README.md                          |  5 +++--
 examples/contains_a_saved_track.py | 25 +++++++++++++++++++++++++
 spotipy/__init__.py                |  7 +++++++
 3 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 examples/contains_a_saved_track.py

diff --git a/README.md b/README.md
index fb2a188..d7ebb87 100644
--- a/README.md
+++ b/README.md
@@ -66,8 +66,9 @@ A full set of examples can be found in the [Spotipy examples directory](https://
   - **user_playlists(self, user)** -      Gets playlists of a user
   - **current_user(self)** -  Get detailed profile information about the current user.
   - **current_user_saved_tracks(self, limit=20, offset=0)** -  Gets a list of the tracks saved in the current authorized user's "Your Music" library
-  - **current_user_saved_tracks_delete(self, limit=20, offset=0)** - Remove tracks from the current authorized user's "Your Music" library
-  - **current_user_saved_tracks_add(self, limit=20, offset=0)** - Add tracks to the current authorized user's "Your Music" library
+  - **current_user_saved_tracks_delete(self, tracks)** - Remove tracks from the current authorized user's "Your Music" library
+  - **current_user_saved_tracks_add(self, tracks)** - Add tracks to the current authorized user's "Your Music" library
+  - **current_user_saved_tracks_contains(self, tracks)** - Check if one or more tracks is already saved in the current Spotify user’s “Your Music” library.
 
 Refer to the [Spotify API documentation](https://developer.spotify.com/spotify-web-api/) for details on the methods and parameters.
 
diff --git a/examples/contains_a_saved_track.py b/examples/contains_a_saved_track.py
new file mode 100644
index 0000000..6155fad
--- /dev/null
+++ b/examples/contains_a_saved_track.py
@@ -0,0 +1,25 @@
+import pprint
+import sys
+
+import spotipy
+import spotipy.oauth2 as oauth2
+import util
+
+scope = 'user-library-read'
+
+if len(sys.argv) > 2:
+    username = sys.argv[1]
+    tids = sys.argv[2:]
+else:
+    print "Usage: %s username track-id ..." % (sys.argv[0],)	
+    sys.exit()
+
+token = util.prompt_for_user_token(username, scope)
+
+if token:
+    sp = spotipy.Spotify(auth=token)
+    sp.trace = False
+    results = sp.current_user_saved_tracks_contains(ids=tids)
+    pprint.pprint(results)
+else:
+    print "Can't get token for", username
\ No newline at end of file
diff --git a/spotipy/__init__.py b/spotipy/__init__.py
index c7e884d..009d5a2 100644
--- a/spotipy/__init__.py
+++ b/spotipy/__init__.py
@@ -272,6 +272,13 @@ class Spotify(object):
         tlist = [self._get_id('track', t) for t in ids]
         return self.put('me/tracks/?ids=' + ','.join(tlist))
 
+    def current_user_saved_tracks_contains(self, ids=[]):
+        ''' Check if one or more tracks is already saved in
+            the current Spotify user’s “Your Music” library.
+        '''
+        tlist = [self._get_id('track', t) for t in ids]
+        return self.get('me/tracks/contains?ids=' + ','.join(tlist))
+
     def _get_id(self, type, id):
         fields = id.split(':')
         if len(fields) == 3: