import json import string import requests from urllib.parse import quote from app.db.userdata import SimilarArtistTable from app.models.artist import Artist from app.models.mix import Mix from app.models.track import Track from app.plugins import Plugin, plugin_method from app.store.artists import ArtistStore from app.store.tracks import TrackStore from app.utils.dates import get_date_range from app.utils.mixes import balance_mix from app.utils.remove_duplicates import remove_duplicates from app.utils.stats import get_artists_in_period class MixesPlugin(Plugin): MAX_TRACKS_TO_FETCH = 5 TRACK_MIX_LENGTH = 50 MIN_TRACK_MIX_LENGTH = 15 MIN_DAY_LISTEN_DURATION = 3 * 60 # 3 minutes MIN_WEEK_LISTEN_DURATION = 10 * 60 # 10 minutes MIN_MONTH_LISTEN_DURATION = 20 * 60 # 20 minutes def __init__(self): super().__init__("mixes", "Mixes") self.server = "https://smcloud.mungaist.com" self.set_active(True) @plugin_method def get_track_mix(self, tracks: list[Track], with_help: bool = False): """ Given a list of tracks, creates a mix by fetching data from the Swing Music Cloud recommendation server. The server returns a list of weak trackhashes. We use these to fetch the matching track data from our library database. Found tracks are then balanced and returned as the final mix tracklist. :param with_help: Whether to include the help flag in the query. The flag tells the server to find more data using other tracks from the same album. """ queries = [ { "query": f"{track.title} - {','.join(a['name'] for a in track.artists)}", "album": track.og_album, "with_help": with_help, } for track in tracks ] response = requests.post( f"{self.server}/radio", json=queries, ) results = response.json() # artisthashes = results["artists"] trackhashes: list[str] = results["tracks"] trackmatches = TrackStore.get_flat_list() trackmatches = [t for t in trackmatches if t.weakhash in trackhashes] # filter out duplicates of the same weakhash # group by weakhash and pick the one with the highest bitrate grouped: dict[str, list[Track]] = {} for track in trackmatches: grouped.setdefault(track.weakhash, []).append(track) trackmatches = [ max(group, key=lambda x: x.bitrate) for group in grouped.values() ] # sort by trackhash order trackmatches = sorted(trackmatches, key=lambda x: trackhashes.index(x.weakhash)) # try to balance the mix trackmatches = balance_mix(trackmatches) return trackmatches @plugin_method def get_artist_mix(self, artisthash: str): """ Given an artisthash, creates an artist mix using the self.MAX_TRACKS_TO_FETCH most listened to tracks. """ artist = ArtistStore.artistmap[artisthash] tracks = TrackStore.get_tracks_by_trackhashes(artist.trackhashes) tracks = sorted(tracks, key=lambda x: x.playduration, reverse=True) return self.get_track_mix(tracks[: self.MAX_TRACKS_TO_FETCH]) @plugin_method def create_artist_mixes(self): mixes: list[Mix] = [] indexed = set() today_start, today_end = get_date_range(duration="day") last_2_days_start, last_2_days_end = get_date_range(duration="day", units_ago=2) last_7_days_start, last_7_days_end = get_date_range(duration="week") last_1_month_start, last_1_month_end = get_date_range(duration="month") artists = { "today": { "max": 3, "artists": get_artists_in_period(today_start, today_end), "created": 0, }, "last_2_days": { "max": 2, "artists": get_artists_in_period(last_2_days_start, last_2_days_end), "created": 0, }, "last_7_days": { "max": 3, "artists": get_artists_in_period(last_7_days_start, last_7_days_end), "created": 0, }, "last_1_month": { "max": 2, "artists": get_artists_in_period(last_1_month_start, last_1_month_end), "created": 0, }, } for i, period in enumerate(artists.values()): # if previous period has less than its max # add the difference to this period's limit limit = period["max"] if i > 0: previous_period = artists[list(artists.keys())[i - 1]] if previous_period["created"] < previous_period["max"]: limit += previous_period["max"] - previous_period["created"] for artist in period["artists"][:limit]: mix = self.create_artist_mix(artist) if mix: mixes.append(mix) indexed.add(artist["artisthash"]) period["created"] += 1 print(f"⭐⭐⭐⭐ Created {len(mixes)} mixes") return mixes def get_mix_description(self, tracks: list[Track], artishash: str): """ Constructs a description for a mix by putting together the first n=4 artists in the mix tracklist. """ first_4_artists = [] indexed = set() for track in tracks: if len(first_4_artists) < 4: if ( track.artists[0]["artisthash"] != artishash and track.artists[0]["artisthash"] not in indexed ): first_4_artists.append(track.artists[0]) indexed.add(track.artists[0]["artisthash"]) if len(first_4_artists) == 4: return f"Featuring {', '.join(a['name'] for a in first_4_artists)} and more" if len(first_4_artists) > 0: return f"Featuring {', '.join(a['name'] for a in first_4_artists)}" return f"Featuring {tracks[0].artists[0]['name']}" def create_artist_mix(self, artist: dict[str, str]): """ Given an artist dict, creates an artist mix. """ _artist = ArtistStore.get_artist_by_hash(artist["artisthash"]) if not _artist: return None mix_tracks = self.get_artist_mix(artist["artisthash"]) if len(mix_tracks) < self.MIN_TRACK_MIX_LENGTH: return None return Mix( # the a prefix indicates that this is an artist mix id=f"a{artist['artisthash']}", title=artist["artist"] + " Radio", description=self.get_mix_description(mix_tracks, artist["artisthash"]), tracks=[t.trackhash for t in mix_tracks], extra={ "type": "artist", "artisthash": artist["artisthash"], "image": { "image": _artist.image, "color": _artist.color, }, }, ) def fallback_create_artist_mix( self, artist: dict[str, str], similar_artists: list[str], trackhashes: set[str], limit: int, ): """ Creates an artist mix by selecting random tracks from similar artists. This is used when: - The Swing Music recommendation server is down. - The artist has less than self.MIN_TRACK_MIX_LENGTH tracks from the cloud mix. - When we need to dilute the mix to balance the artist distribution. :param artist: The artist to create a mix for. :param similar_artists: A list of similar artists to select tracks from. If not provided, we try reading from the local database. When we exhaust the passed list, we also try reading from the local database. :param trackhashes: A set of trackhashes to omit from the new tracklist. :param limit: The maximum number of tracks to select. """ artists = similar_artists if len(similar_artists) == 0: local_similar_artists = SimilarArtistTable.get_by_hash(artist["artisthash"]) if local_similar_artists: artists = [a.artisthash for a in local_similar_artists.similar_artists] if len(artists) == 0: return [] # CHECKPOINT: I'M TIRED AF AND I NEED TO SLEEP # The plan: # Figure out which artists we should skip for the new tracklist # these would be artists with a large number of tracks in the mix already # Since the artisthashes are ordered by similarity score, we iterate from the start # and go forward collecting tracks that aren't in the mix yet. #