def likes_query(self, offset):
q = Like.all()
q.filter("listener", self.station)
q.filter("created <", offset)
q.order("-created")
likes = q.fetch(10)
return likes
def add_to_likes(self, track):
# Check if the like hasn't been stored yet
q = Like.all()
q.filter("listener", self.station.key())
q.filter("track", track.key())
existing_like = q.get()
if(existing_like):
logging.info("Track already liked by this listener")
else:
like = Like(
track = track.key(),
listener = self.station.key(),
)
like.put()
logging.info("Like saved into datastore")
self.increment_likes_counter()
logging.info("Listener likes counter incremented")
Track.increment_likes_counter(track.key().id())
logging.info("Track likes counter incremented")
def delete_from_likes(self, track):
q = Like.all()
q.filter("listener", self.station.key())
q.filter("track", track.key())
like = q.get()
if like is None:
logging.info("This track has never been liked by this listener")
else:
like.delete()
logging.info("Like deleted from datastore")
self.decrement_likes_counter()
logging.info("Listener Likes counter decremented")
Track.decrement_likes_counter(track.key().id())
logging.info("Track likes counter decremented")
def delete(self, id):
track = Track.get_by_id(int(id))
response = False
if(track):
# Queriying datastore for associated Like
query = Like.all()
query.filter("track", track)
query.filter("listener", self.user_proxy.user.profile)
like = query.get()
if like:
logging.info("Like associated to track_id %s and listener %s retrieved from datastore."%(id, self.user_proxy.profile["name"]))
like.delete()
response = True
logging.info("Like is now deleted from datstore")
else:
logging.info("Like associated to track_id %s and listener %s does not exist in datastore."%(id, self.user_proxy.profile["name"]))
self.response.out.write(json.dumps({ "response": response }))
def get_likes(self, offset): likes = self.likes_query(offset) extended_likes = Like.get_extended_likes(likes) return extended_likes
def delete(self):
cursor = self.request.get("cursor")
track_id = self.request.get("track_id")
typeModel = self.request.get("type")
if(track_id):
track = Track.get_by_id(int(track_id))
logging.info("Getting from datastore track with track_id = " + track_id)
if(track):
logging.info("Track found")
if(typeModel == "broadcast"):
# Deleting broadcasts associated to track
query = Broadcast.all()
query.filter("track", track)
if(cursor):
logging.info("Cursor found")
query.with_cursor(start_cursor = cursor)
broadcasts = query.fetch(100)
logging.info("Fetched : %d Broadcast(s) from datastore."%(len(broadcasts)))
if(len(broadcasts)>0):
db.delete(broadcasts)
logging.info("Deleted : %d Broadcast(s) from datastore."%(len(broadcasts)))
task = Task(
method = 'DELETE',
url = "/taskqueue/deletetrack",
params = {
"cursor": cursor,
"track_id": track_id,
"type": typeModel,
}
)
task.add(queue_name="worker-queue")
else:
task = Task(
method = 'DELETE',
url = "/taskqueue/deletetrack",
params = {
"track_id": track_id,
"type": "like",
}
)
task.add(queue_name="worker-queue")
elif (typeModel == "like"):
# Deleting likes associated to track
query = Like.all()
query.filter("track", track)
if(cursor):
logging.info("Cursor found")
query.with_cursor(start_cursor = cursor)
like = query.get()
if like is None:
logging.info("No like for this track, deleting track.")
track.delete()
else:
try:
listener_proxy = StationApi(like.listener.shortname)
listener_proxy.decrement_likes_counter()
logging.info("Listener Like counter decremented")
except:
logging.info("User has not created a station (likes used to be linked to user to stations)")
Track.decrement_likes_counter(track.key().id())
logging.info("Track likes counter decremented")
like.delete()
logging.info("Like deleted from datastore")
cursor = query.cursor()
task = Task(
method = 'DELETE',
url = "/taskqueue/deletetrack",
params = {
"cursor": cursor,
"track_id": track_id,
"type": typeModel,
}
)
task.add(queue_name="worker-queue")
response = True
else:
response = False
self.response.out.write(json.dumps({ "response": response }))
