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spotify.py
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spotify.py
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"""Handles Spotify authorization, access tokens, and API requests."""
import os
import base64
from flask import session
import urllib
import requests
from config import SPOTIFY_CLIENT_ID, SPOTIFY_CLIENT_SECRET, SPOTIFY_REDIRECT_URI
SPOTIFY_AUTHORIZATION_URL='https://accounts.spotify.com/authorize'
SPOTIFY_TOKEN_ENDPOINT='https://accounts.spotify.com/api/token'
SPOTIFY_USER_ENDPOINT = 'https://api.spotify.com/v1/me'
SPOTIFY_TOP_ARTISTS_ENDPOINT = 'https://api.spotify.com/v1/me/top/artists'
SPOTIFY_RELATED_ARTISTS_ENDPOINT ='https://api.spotify.com/v1/artists'
def get_auth_url():
"""Return Spotify authorization URL."""
payload = {
'client_id': SPOTIFY_CLIENT_ID,
'response_type': 'code',
'redirect_uri': SPOTIFY_REDIRECT_URI,
'scope': 'user-library-read user-top-read user-read-private'
}
url_args = urllib.parse.urlencode(payload)
auth_url = f"{SPOTIFY_AUTHORIZATION_URL}/?{url_args}"
return auth_url
def get_access_token(request):
"""Return Spotify access token."""
auth_code = request.args.get('code')
payload = {
'grant_type': 'authorization_code',
'code': str(auth_code),
'redirect_uri': SPOTIFY_REDIRECT_URI
}
client_encoded_str = base64.b64encode(f"{SPOTIFY_CLIENT_ID}:{SPOTIFY_CLIENT_SECRET}".encode('ascii'))
auth_header = {"Authorization": f"Basic {client_encoded_str.decode('ascii')}"}
response = requests.post(SPOTIFY_TOKEN_ENDPOINT, data=payload, headers=auth_header)
return response.json()
def refresh_token():
"""Return new Spotify access token in exchange for ref resh token."""
refresh_payload = {
'grant_type': 'refresh_token',
'refresh_token': session['refresh_token']
}
client_encoded_str = base64.b64encode(f"{SPOTIFY_CLIENT_ID}:{SPOTIFY_CLIENT_SECRET}".encode('ascii'))
refresh_auth_header = {"Authorization": f"Basic {client_encoded_str.decode('ascii')}"}
response = requests.post(SPOTIFY_TOKEN_ENDPOINT, data=refresh_payload, headers=refresh_auth_header)
response = response.json()
access_token = response['access_token']
return access_token
def get_top_artists(access_token):
"""Return a user's top 40 Spotify artists."""
payload = {
'time_range': 'medium_term',
'limit': '40'
}
url_args = urllib.parse.urlencode(payload)
url = f"{SPOTIFY_TOP_ARTISTS_ENDPOINT}/?{url_args}"
auth_header = {"Authorization": f"Bearer {access_token}"}
response = requests.get(url, headers=auth_header)
if response.status_code == 200:
response = response.json()
artists = format_artist_data(response)
return artists
elif response.status_code == 401:
access_token = refresh_token()
return get_top_artists(access_token)
def format_artist_data(response):
"""Return a list of formatted artist data in tuples: index, name, url, image, and id."""
artists = []
for index, item in enumerate(response['items'], 1):
artists.append((index, item['name'], item['external_urls']['spotify'], item['images'][2]['url'], item['id']))
return artists
def get_related_artists(access_token):
"""Return a list of related artists to top 40 Spotify artists in tuples: name, id."""
top_artists = get_top_artists(access_token)
related_artists = []
for artist in top_artists:
name = artist[0]
id = artist[4]
url = f"{SPOTIFY_RELATED_ARTISTS_ENDPOINT}/{id}/related-artists"
auth_header = {"Authorization": f"Bearer {access_token}"}
response = requests.get(url, headers=auth_header)
if response.status_code == 200:
response = response.json()
filtered_artists = filter_related_artists(response)
related_artists.extend(filtered_artists)
elif response.status_code == 401:
access_token = refresh_token()
return get_related_artists(access_token)
return related_artists
def filter_related_artists(response):
"""Return a list of 5 related artists with tuple-formatted name, id."""
filtered_artists = []
for i in range(0, 5):
if response['artists']:
artist = response['artists'][i]
filtered_artists.append((artist['id'], artist['name']))
return filtered_artists
def get_user_profile(access_token):
"""Return Spotify profile information about the current user."""
auth_header = {"Authorization": f"Bearer {access_token}"}
response = requests.get(SPOTIFY_USER_ENDPOINT, headers=auth_header)
if response.status_code == 200:
return response.json()
elif response.status_code == 401:
access_token = refresh_token()
return get_user_profile(access_token)