95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
import re
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import time
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from base64 import b64encode
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import aiohttp
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from .album import Album
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from .exceptions import InvalidSpotifyURL, SpotifyRequestException
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from .playlist import Playlist
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from .track import Track
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GRANT_URL = "https://accounts.spotify.com/api/token"
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REQUEST_URL = "https://api.spotify.com/v1/{type}s/{id}"
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SPOTIFY_URL_REGEX = re.compile(
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r"https?://open.spotify.com/(?P<type>album|playlist|track)/(?P<id>[a-zA-Z0-9]+)"
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)
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class Client:
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"""The base client for the Spotify module of Pomice.
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This class will do all the heavy lifting of getting all the metadata
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for any Spotify URL you throw at it.
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"""
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def __init__(self, client_id: str, client_secret: str) -> None:
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self._client_id = client_id
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self._client_secret = client_secret
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self.session = aiohttp.ClientSession()
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self._bearer_token: str = None
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self._expiry = 0
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self._auth_token = b64encode(f"{self._client_id}:{self._client_secret}".encode())
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self._grant_headers = {"Authorization": f"Basic {self._auth_token.decode()}"}
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self._bearer_headers = None
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async def _fetch_bearer_token(self) -> None:
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_data = {"grant_type": "client_credentials"}
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async with self.session.post(GRANT_URL, data=_data, headers=self._grant_headers) as resp:
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if resp.status != 200:
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raise SpotifyRequestException(
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f"Error fetching bearer token: {resp.status} {resp.reason}"
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)
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data: dict = await resp.json()
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self._bearer_token = data["access_token"]
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self._expiry = time.time() + (int(data["expires_in"]) - 10)
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self._bearer_headers = {"Authorization": f"Bearer {self._bearer_token}"}
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async def search(self, *, query: str):
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if not self._bearer_token or time.time() >= self._expiry:
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await self._fetch_bearer_token()
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result = SPOTIFY_URL_REGEX.match(query)
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spotify_type = result.group("type")
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spotify_id = result.group("id")
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if not result:
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return InvalidSpotifyURL("The Spotify link provided is not valid.")
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request_url = REQUEST_URL.format(type=spotify_type, id=spotify_id)
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async with self.session.get(request_url, headers=self._bearer_headers) as resp:
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if resp.status != 200:
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raise SpotifyRequestException(
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f"Error while fetching results: {resp.status} {resp.reason}"
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)
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data: dict = await resp.json()
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if spotify_type == "track":
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return Track(data)
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elif spotify_type == "album":
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return Album(data)
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# processing a playlist result
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tracks = [Track(track["track"]) for track in data["tracks"]["items"]]
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next_page_url = data["tracks"]["next"]
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while next_page_url is not None:
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async with self.session.get(next_page_url, headers=self._bearer_headers) as resp:
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if resp.status != 200:
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raise SpotifyRequestException(
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f"Error while fetching results: {resp.status} {resp.reason}"
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)
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next_data: dict = await resp.json()
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tracks += [Track(track["track"]) for track in next_data["items"]]
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next_page_url = next_data["next"]
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return Playlist(data, tracks)
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