def create_channel_and_get_first_video(artist_name):
"""
Constructs a new channel from a given seed artist, and returns first video
that should be displayed
"""
# Take care of the channel stuff
channel = create_channel(artist_name)
playlist_info = echonest.start_dynamic_playlist(artist_name)
channel.echonest_session_id = playlist_info['session_id']
channel.save()
rval = {}
rval['channel'] = channel
# Get the video!
videos = youtube.find_music_videos(playlist_info['artist_name'], playlist_info['song_title'], 1)
if videos is None:
for _ in xrange(MAX_FIRST_VIDEO_RETRY_SEARCH_ATTEMPT):
song_info = echonest.get_next_song_dynamic_playlist(channel.echonest_session_id, channel.seed_artist)
videos = youtube.find_music_videos(song_info['artist_name'], song_info['song_title'], 1)
if videos is not None:
# We're done here, move along...
break
time.sleep(RETRY_WAIT_TIME)
if videos != None:
rval['video_info'] = videos[0]
rval['artist'] = playlist_info['artist_name']
rval['song'] = playlist_info['song_title']
return rval
def search_and_create_video_next_on_playlist(channel_hash):
"""
Searches for a video corresponding to next song on channel's playlist
from echonest, and then save to persistence layer. Video object is then returned
"""
video = None
# Get channel
c = channel.retrieve(channel_hash)
for _ in xrange(MAX_PLAYLIST_VIDEO_ATTEMPT):
# Get next song (potential next video) from playlist
song_info = None
for _ in xrange(MAX_SONG_INFO_RETRY):
song_info = echonest.get_next_song_dynamic_playlist(c.echonest_session_id, c.seed_artist)
if song_info is None:
# Something messed up with the echonest playlist, try restart
time.sleep(SONG_RETRY_TIME)
song_info = echonest.restart_dynamic_playlist(c.seed_artist)
if song_info is not None:
c.echonest_session_id = song_info['session_id']
c.save()
break
else:
# Found a song
break
# Find a video
video = search_and_create_video(song_info['artist_name'], song_info['song_title'], channel_hash)
if video is not None:
return video
else:
time.sleep(PLAYLIST_RETRY_TIME)
return None
