def post(self):
""" Create a new playlist. """
listName = self.request.get('name')
if not listName:
errorOut(self.response, 400)
return
user = users.get_current_user()
if not user:
errorOut(self.response, 401)
return
# Generate a unique ID for the new list.
listId = ''
while True:
listId = uuid4().hex
if not Playlist.gql('WHERE playlistId = :1', listId).get():
break
# Create and store the playlist.
newList = Playlist()
newList.playlistId = listId
newList.name = listName
newList.put()
# Identify the user as the owner of that playlist.
playlistUserMap = PlaylistUser()
playlistUserMap.playlistId = listId
playlistUserMap.user = user
playlistUserMap.isOwner = True
playlistUserMap.put()
# Output the playlist's metadata as JSON.
self.response.headers['Content-Type'] = 'application/json'
self.response.out.write(json.dumps({
'playlistId': listId,
'name': listName
}))
def get(self):
""" Get a user's playlists. """
user = users.get_current_user()
if not user:
errorOut(self.response, 401)
return
playlistData = []
playlistUserMaps = PlaylistUser.gql('WHERE user = :1', user).fetch(limit=None)
for playlistUserMap in playlistUserMaps:
playlist = Playlist.gql('WHERE playlistId = :1', playlistUserMap.playlistId).get()
playlistData.append({
'playlistId': playlist.playlistId,
'name': playlist.name
})
# Convert the dictionaries to JSON and output it.
self.response.headers['Content-Type'] = 'application/json'
self.response.out.write(json.dumps(playlistData))
def get(self):
""" Get the songs in a given playlist. """
# Ensure a list was requested.
listId = self.request.get('list')
if not listId:
errorOut(self.response, 404)
return
# Ensure the user is signed in.
user = users.get_current_user()
if not user:
errorOut(self.response, 401)
return
# Ensure the playlist exists.
playlist = Playlist.gql('WHERE playlistId = :1', listId).get()
if not playlist:
errorOut(self.response, 404)
return
# Ensure the user has permission to access the playlist.
playlistUserMap = PlaylistUser.gql('WHERE user = :1 AND playlistId = :2', user, listId).get()
if not playlistUserMap:
errorOut(self.response, 403)
return
songData = []
listSongs = PlaylistItem.gql('WHERE playlistId = :1', listId).order(PlaylistItem.timeAdded).fetch(limit=None)
for song in listSongs:
songData.append({
'songId': song.songId,
'title': song.title,
'album': song.album,
'artist': song.artist
})
# Convert the dictionaries to JSON and output it.
self.response.headers['Content-Type'] = 'application/json'
self.response.out.write(json.dumps(songData))
