Graphs and tables for your Spotify account.
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# imports {{{ #
import requests
import math
import pprint
import os
import json
from django.db.models import Count, Q, F
from django.http import JsonResponse
from django.core import serializers
from django.utils import timezone
from .models import *
from login.models import User
from django.db.models import FloatField
from django.db.models.functions import Cast
# }}} imports #
console_logging = True
# console_logging = False
artists_genre_processed = 0
features_processed = 0
# update_track_genres {{{ #
def update_track_genres(user_obj):
"""Updates user_obj's tracks with the most common genre associated with the
songs' artist(s).
:user_obj: User object who's tracks are being updated.
:returns: None
"""
tracks_processed = 0
user_tracks = Track.objects.filter(users__exact=user_obj)
for track in user_tracks:
# just using this variable to save another call to db
track_artists = list(track.artists.all())
# TODO: Use the most popular genre of the first artist as the Track genre
first_artist_genres = track_artists[0].genres.all().order_by('-num_songs')
undefined_genre_obj = Genre.objects.get(name="undefined")
most_common_genre = first_artist_genres.first() if first_artist_genres.first() is \
not undefined_genre_obj else first_artist_genres[1]
track.genre = most_common_genre if most_common_genre is not None \
else undefined_genre_obj
track.save()
tracks_processed += 1
if console_logging:
print("Added '{}' as genre for song #{} - '{}'".format(
track.genre,
tracks_processed,
track.name,
))
# }}} update_track_genres #
# save_track_obj {{{ #
def save_track_obj(track_dict, artists, user_obj):
"""Make an entry in the database for this track if it doesn't exist already.
:track_dict: dictionary from the API call containing track information.
:artists: artists of the song, passed in as a list of Artist objects.
:user_obj: User object for which this Track is to be associated with.
:returns: (The created/retrieved Track object, created)
"""
track_query = Track.objects.filter(id__exact=track_dict['id'])
if len(track_query) != 0:
return track_query[0], False
else:
new_track = Track.objects.create(
id=track_dict['id'],
year=track_dict['album']['release_date'].split('-')[0],
popularity=int(track_dict['popularity']),
runtime=int(float(track_dict['duration_ms']) / 1000),
name=track_dict['name'],
)
# have to add artists and user_obj after saving object since track needs to
# have ID before filling in m2m field
for artist in artists:
new_track.artists.add(artist)
new_track.users.add(user_obj)
new_track.save()
return new_track, True
# }}} save_track_obj #
# get_audio_features {{{ #
def get_audio_features(headers, track_objs):
"""Creates and saves a new AudioFeatures objects for the respective
track_objs. track_objs should contain the API limit for a single call
(FEATURES_LIMIT) for maximum efficiency.
:headers: headers containing the API token
:track_objs: Track objects to associate with the new AudioFeatures object
:returns: None
"""
track_ids = str.join(",", [track_obj.id for track_obj in track_objs])
params = {'ids': track_ids}
features_response = requests.get("https://api.spotify.com/v1/audio-features",
headers=headers,
params={'ids': track_ids}
).json()['audio_features']
# pprint.pprint(features_response)
useless_keys = [ "key", "mode", "type", "liveness", "id", "uri",
"track_href", "analysis_url", "time_signature", ]
for i in range(len(track_objs)):
if features_response[i] is not None:
# Data that we don't need
cur_features_obj = AudioFeatures()
cur_features_obj.track = track_objs[i]
for key, val in features_response[i].items():
if key not in useless_keys:
setattr(cur_features_obj, key, val)
cur_features_obj.save()
if console_logging:
global features_processed
features_processed += 1
print("Added features for song #{} - {}".format(
features_processed, track_objs[i].name))
# }}} get_audio_features #
# process_artist_genre {{{ #
def process_artist_genre(genre_name, artist_obj):
"""Increase count for corresponding Genre object to genre_name and associate that
Genre object with artist_obj.
:genre_name: Name of genre.
:artist_obj: Artist object to associate Genre object with
:returns: None
"""
genre_obj, created = Genre.objects.get_or_create(name=genre_name, defaults={'num_songs': 1})
if not created:
genre_obj.num_songs = F('num_songs') + 1
genre_obj.save()
artist_obj.genres.add(genre_obj)
artist_obj.save()
# }}} process_artist_genre #
# add_artist_genres {{{ #
def add_artist_genres(headers, artist_objs):
"""Adds genres to artist_objs and increases the count the respective Genre
object. artist_objs should contain the API limit for a single call
(ARTIST_LIMIT) for maximum efficiency.
:headers: For making the API call.
:artist_objs: List of Artist objects for which to add/tally up genres for.
:returns: None
"""
artist_ids = str.join(",", [artist_obj.id for artist_obj in artist_objs])
artists_response = requests.get('https://api.spotify.com/v1/artists/',
headers=headers,
params={'ids': artist_ids},
).json()['artists']
for i in range(len(artist_objs)):
if len(artists_response[i]['genres']) == 0:
process_artist_genre("undefined", artist_objs[i])
else:
for genre in artists_response[i]['genres']:
process_artist_genre(genre, artist_objs[i])
if console_logging:
global artists_genre_processed
artists_genre_processed += 1
print("Added genres for artist #{} - {}".format(
artists_genre_processed, artist_objs[i].name))
# }}} add_artist_genres #
# get_artists_in_genre {{{ #
def get_artists_in_genre(user, genre):
"""Return count of artists in genre.
:user: User object to return data for.
:genre: genre to count artists for. (string)
:returns: dict of artists in the genre along with the number of songs they
have.
"""
genre_obj = Genre.objects.get(name=genre)
tracks_in_genre = Track.objects.filter(genre=genre_obj, users=user)
track_count = tracks_in_genre.count()
user_artists = Artist.objects.filter(track__users=user) # use this variable to save on db queries
total_artist_counts = tracks_in_genre.aggregate(counts=Count('artists'))['counts']
processed_artist_counts = {}
for artist in user_artists:
processed_artist_counts[artist.name] = round(artist.track_set
.filter(genre=genre_obj, users=user)
.count() * track_count / total_artist_counts, 2)
return processed_artist_counts
# }}} get_artists_in_genre #
def get_user_header(user_obj):
"""Returns the authorization string needed to make an API call.
:user_obj: User to return the auth string for.
:returns: the authorization string used for the header in a Spotify API
call.
"""
seconds_elapsed = (timezone.now() -
user_obj.access_obtained_at).total_seconds()
if seconds_elapsed >= user_obj.access_expires_in:
req_body = {
'grant_type': 'refresh_token',
'refresh_token': user_obj.refresh_token,
'client_id': os.environ['SPOTIFY_CLIENT_ID'],
'client_secret': os.environ['SPOTIFY_CLIENT_SECRET']
}
token_response = requests.post('https://accounts.spotify.com/api/token',
data=req_body).json()
user_obj.access_token = token_response['access_token']
user_obj.access_expires_in = token_response['expires_in']
user_obj.save()
return {'Authorization': "Bearer " + user_obj.access_token}