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Spotify Web API Client
Provides access to Spotify's database for audio features and preview URLs.
Used as secondary data source for BeatDebate.
"""
import base64
import time
from typing import Dict, List, Optional, Any
from dataclasses import dataclass
import structlog
from .base_client import BaseAPIClient
from .rate_limiter import UnifiedRateLimiter
logger = structlog.get_logger(__name__)
@dataclass
class SpotifyTrack:
"""Spotify track data."""
id: str
name: str
artist: str
album: str
preview_url: Optional[str] = None
external_urls: Optional[Dict[str, str]] = None
duration_ms: Optional[int] = None
popularity: Optional[int] = None
@dataclass
class AudioFeatures:
"""Spotify audio features."""
track_id: str
danceability: float
energy: float
valence: float
acousticness: float
instrumentalness: float
speechiness: float
liveness: float
loudness: float
tempo: float
time_signature: int
key: int
mode: int
class SpotifyClient(BaseAPIClient):
"""
Spotify Web API client with unified authentication and rate limiting.
Focuses on audio features and preview URLs for BeatDebate.
Inherits from BaseAPIClient for consistent HTTP handling across all API clients.
"""
BASE_URL = "https://api.spotify.com/v1"
AUTH_URL = "https://accounts.spotify.com/api/token"
def __init__(
self,
client_id: str,
client_secret: str,
rate_limiter: Optional[UnifiedRateLimiter] = None
):
"""
Initialize Spotify client.
Args:
client_id: Spotify client ID
client_secret: Spotify client secret
rate_limiter: Rate limiter instance (optional, will create default if not provided)
"""
# Create default rate limiter if not provided
if rate_limiter is None:
rate_limiter = UnifiedRateLimiter.for_spotify()
# Initialize base client
super().__init__(
base_url=self.BASE_URL,
rate_limiter=rate_limiter,
timeout=10,
service_name="Spotify"
)
self.client_id = client_id
self.client_secret = client_secret
self.access_token: Optional[str] = None
self.token_expires_at: float = 0.0
self.logger.info("Spotify client initialized")
def _extract_api_error(self, data: Dict[str, Any]) -> Optional[str]:
"""
Extract Spotify API error information from response data.
Args:
data: Parsed response data
Returns:
Error message if found, None otherwise
"""
if "error" in data:
error_info = data["error"]
if isinstance(error_info, dict):
return error_info.get("message", f"Error {error_info.get('status', 'unknown')}")
return str(error_info)
return None
async def __aenter__(self):
"""Async context manager entry with authentication."""
await super().__aenter__()
await self._authenticate()
return self
async def _authenticate(self) -> None:
"""Authenticate with Spotify API using client credentials flow."""
if not self.session:
raise RuntimeError("Client not initialized. Use async context manager.")
# Prepare authentication
auth_str = f"{self.client_id}:{self.client_secret}"
auth_b64 = base64.b64encode(auth_str.encode()).decode()
headers = {
"Authorization": f"Basic {auth_b64}",
"Content-Type": "application/x-www-form-urlencoded"
}
data = {"grant_type": "client_credentials"}
try:
async with self.session.post(
self.AUTH_URL,
headers=headers,
data=data
) as response:
if response.status == 200:
token_data = await response.json()
self.access_token = token_data["access_token"]
expires_in = token_data.get("expires_in", 3600)
self.token_expires_at = time.time() + expires_in - 60 # 1min buffer
self.logger.info(
"Spotify authentication successful",
expires_in=expires_in
)
else:
error_data = await response.json()
self.logger.error(
"Spotify authentication failed",
status=response.status,
error=error_data
)
raise Exception(f"Spotify auth failed: {error_data}")
except Exception as e:
self.logger.error("Spotify authentication error", error=str(e))
raise
async def _ensure_valid_token(self) -> None:
"""Ensure we have a valid access token."""
if not self.access_token or time.time() >= self.token_expires_at:
await self._authenticate()
async def _make_spotify_request(
self,
endpoint: str,
params: Optional[Dict[str, Any]] = None,
retries: int = 3
) -> Dict[str, Any]:
"""
Make authenticated request to Spotify API.
Args:
endpoint: API endpoint (without base URL)
params: Query parameters
retries: Number of retry attempts
Returns:
API response data
"""
await self._ensure_valid_token()
headers = {
"Authorization": f"Bearer {self.access_token}",
"Content-Type": "application/json"
}
return await self._make_request(
endpoint=endpoint,
params=params,
headers=headers,
retries=retries
)
async def search_track(
self,
artist: str,
track: str,
limit: int = 1
) -> Optional[SpotifyTrack]:
"""
Search for a track on Spotify.
Args:
artist: Artist name
track: Track name
limit: Number of results (default: 1)
Returns:
First matching Spotify track or None
"""
try:
query = f"artist:{artist} track:{track}"
data = await self._make_spotify_request(
"search",
{
"q": query,
"type": "track",
"limit": limit
}
)
if "tracks" in data and data["tracks"]["items"]:
track_data = data["tracks"]["items"][0]
return SpotifyTrack(
id=track_data["id"],
name=track_data["name"],
artist=track_data["artists"][0]["name"],
album=track_data["album"]["name"],
preview_url=track_data.get("preview_url"),
external_urls=track_data.get("external_urls"),
duration_ms=track_data.get("duration_ms"),
popularity=track_data.get("popularity")
)
return None
except Exception as e:
self.logger.error(
"Spotify track search failed",
artist=artist,
track=track,
error=str(e)
)
return None
async def get_track(self, track_id: str) -> Optional[SpotifyTrack]:
"""
Get track details by Spotify ID.
Args:
track_id: Spotify track ID
Returns:
Spotify track data or None if not found
"""
try:
data = await self._make_spotify_request(f"tracks/{track_id}")
return SpotifyTrack(
id=data["id"],
name=data["name"],
artist=data["artists"][0]["name"],
album=data["album"]["name"],
preview_url=data.get("preview_url"),
external_urls=data.get("external_urls"),
duration_ms=data.get("duration_ms"),
popularity=data.get("popularity")
)
except Exception as e:
self.logger.error(
"Get Spotify track failed",
track_id=track_id,
error=str(e)
)
return None
async def get_audio_features(self, track_id: str) -> Optional[AudioFeatures]:
"""
Get audio features for a track.
Args:
track_id: Spotify track ID
Returns:
Audio features or None if not found
"""
try:
data = await self._make_spotify_request(f"audio-features/{track_id}")
if not data or data.get("id") is None:
return None
return AudioFeatures(
track_id=data["id"],
danceability=data["danceability"],
energy=data["energy"],
valence=data["valence"],
acousticness=data["acousticness"],
instrumentalness=data["instrumentalness"],
speechiness=data["speechiness"],
liveness=data["liveness"],
loudness=data["loudness"],
tempo=data["tempo"],
time_signature=data["time_signature"],
key=data["key"],
mode=data["mode"]
)
except Exception as e:
self.logger.error(
"Get audio features failed",
track_id=track_id,
error=str(e)
)
return None
async def get_multiple_audio_features(
self,
track_ids: List[str]
) -> Dict[str, AudioFeatures]:
"""
Get audio features for multiple tracks.
Args:
track_ids: List of Spotify track IDs (max 100)
Returns:
Dictionary mapping track IDs to audio features
"""
if not track_ids:
return {}
# Spotify API allows max 100 IDs per request
track_ids = track_ids[:100]
try:
data = await self._make_spotify_request(
"audio-features",
{"ids": ",".join(track_ids)}
)
features_dict = {}
if "audio_features" in data:
for features_data in data["audio_features"]:
if features_data: # Can be None for tracks without features
features = AudioFeatures(
track_id=features_data["id"],
danceability=features_data["danceability"],
energy=features_data["energy"],
valence=features_data["valence"],
acousticness=features_data["acousticness"],
instrumentalness=features_data["instrumentalness"],
speechiness=features_data["speechiness"],
liveness=features_data["liveness"],
loudness=features_data["loudness"],
tempo=features_data["tempo"],
time_signature=features_data["time_signature"],
key=features_data["key"],
mode=features_data["mode"]
)
features_dict[features.track_id] = features
self.logger.info(
"Multiple audio features retrieved",
requested=len(track_ids),
retrieved=len(features_dict)
)
return features_dict
except Exception as e:
self.logger.error(
"Get multiple audio features failed",
track_count=len(track_ids),
error=str(e)
)
return {}
async def search_tracks(
self,
query: str,
limit: int = 20,
offset: int = 0
) -> List[SpotifyTrack]:
"""
Search for tracks with a general query.
Args:
query: Search query
limit: Number of results
offset: Result offset
Returns:
List of matching tracks
"""
try:
data = await self._make_spotify_request(
"search",
{
"q": query,
"type": "track",
"limit": limit,
"offset": offset
}
)
tracks = []
if "tracks" in data and "items" in data["tracks"]:
for track_data in data["tracks"]["items"]:
track = SpotifyTrack(
id=track_data["id"],
name=track_data["name"],
artist=track_data["artists"][0]["name"],
album=track_data["album"]["name"],
preview_url=track_data.get("preview_url"),
external_urls=track_data.get("external_urls"),
duration_ms=track_data.get("duration_ms"),
popularity=track_data.get("popularity")
)
tracks.append(track)
self.logger.info(
"Spotify search completed",
query=query,
results_count=len(tracks)
)
return tracks
except Exception as e:
self.logger.error(
"Spotify search failed",
query=query,
error=str(e)
)
return []
# Legacy compatibility - maintain the old SpotifyRateLimiter class for backward compatibility
class SpotifyRateLimiter:
"""Legacy Spotify rate limiter for backward compatibility."""
def __init__(self, calls_per_hour: int = 50):
self.calls_per_hour = calls_per_hour
self._unified_limiter = UnifiedRateLimiter.for_spotify(calls_per_hour)
async def wait_if_needed(self) -> None:
"""Wait if necessary to respect rate limits."""
await self._unified_limiter.wait_if_needed() |