Feat/auth multiple tokens integration (#15)

* Implemented a multiple token read/write/refresh function for the authentificator

* Rework auth with simple authentificate

src/auth.py

@@ -1,3 +1,4 @@
+import base64
 import json
 import os
 import time
@@ -10,6 +11,35 @@ import requests
 TOKEN_FILE_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'env', 'tokens.json')
 
 
+def simple_authenticate(grant_type: str = "client_credentials") -> str:
+    """
+    This function authenticates the user and returns the access token
+
+    :return: str
+    """
+    spotify_client_id, spotify_client_secret, spotify_redirect_uri = _read_env_file()
+    token_url = "https://accounts.spotify.com/api/token"
+    auth_value = f"{spotify_client_id}:{spotify_client_secret}"
+    auth_header = base64.b64encode(auth_value.encode('utf-8')).decode('utf-8')
+
+    headers = {
+        "Authorization": f"Basic {auth_header}",
+        "Content-Type": "application/x-www-form-urlencoded"
+    }
+
+    data = {
+        "grant_type": f"{grant_type}"
+    }
+
+    response = requests.post(token_url, headers=headers, data=data)
+
+    if response.status_code == 200:
+        access_token = response.json().get('access_token')
+        return access_token
+    else:
+        print(f"Error {response.status_code}: {response.text}")
+
+
 def authenticate(scope: str) -> str:
     """
     This function authenticates the user and returns the access token
@@ -19,15 +49,15 @@ def authenticate(scope: str) -> str:
     """
     spotify_client_id, spotify_client_secret, spotify_redirect_uri = _read_env_file()
 
-    tokens = _load_tokens()
+    tokens = _load_tokens(scope)
     if tokens:
         access_token, refresh_token, expires_at = tokens
         if time.time() < expires_at:
             return access_token
         else:
-            print("Token expired, refreshing...")
-            access_token, refresh_token = _refresh_access_token(refresh_token, spotify_client_id, spotify_client_secret)
-            _save_tokens(access_token, refresh_token)
+            print(f"Token for scope {scope} expired, refreshing...")
+            access_token, expires_at = _refresh_access_token(refresh_token, spotify_client_id, spotify_client_secret)
+            _refresh_tokens_file(access_token, scope, expires_at)
             return access_token
 
     auth_url = _get_authorization_url(spotify_client_id, spotify_redirect_uri, scope)
@@ -35,10 +65,10 @@ def authenticate(scope: str) -> str:
 
     authorization_code = _start_server_and_wait_for_code()
 
-    access_token, refresh_token = _exchange_code_for_token(authorization_code, redirect_uri=spotify_redirect_uri,
-                                                           client_id=spotify_client_id, client_secret=spotify_client_secret)
+    access_token, refresh_token, expires_at = _exchange_code_for_token(authorization_code, redirect_uri=spotify_redirect_uri,
+                                                                       client_id=spotify_client_id, client_secret=spotify_client_secret)
 
-    _save_tokens(access_token, refresh_token)
+    _save_tokens(access_token, refresh_token, scope, expires_at)
 
     return access_token
 
@@ -135,7 +165,9 @@ def _exchange_code_for_token(code: str, redirect_uri: str, client_id: str, clien
 
     access_token = response_data['access_token']
     refresh_token = response_data.get('refresh_token', None)
-    return access_token, refresh_token
+    expires_in = response_data['expires_in']
+    expires_at = time.time() + expires_in
+    return access_token, refresh_token, expires_at
 
 
 def _refresh_access_token(refresh_token: str, client_id: str, client_secret: str) -> tuple:
@@ -171,7 +203,7 @@ def _refresh_access_token(refresh_token: str, client_id: str, client_secret: str
     return access_token, expires_at
 
 
-def _load_tokens() -> tuple:
+def _load_tokens(scope: str) -> tuple:
     """
     Loads the tokens from the local file if they exist and are still valid.
 
@@ -180,24 +212,45 @@ def _load_tokens() -> tuple:
     if os.path.exists(TOKEN_FILE_PATH):
         with open(TOKEN_FILE_PATH, 'r') as f:
             tokens = json.load(f)
-            if 'access_token' in tokens and 'expires_at' in tokens and time.time() < tokens['expires_at']:
-                return tokens['access_token'], tokens['refresh_token'], tokens['expires_at']
+            if scope in tokens:
+                if 'access_token' in tokens[scope] and 'expires_at' in tokens[scope] and 'expires_at' in tokens[scope]:
+                    return tokens[scope]['access_token'], tokens[scope]['refresh_token'], tokens[scope]['expires_at']
     return None
 
 
-def _save_tokens(access_token: str, refresh_token: str) -> None:
+def _save_tokens(access_token: str, refresh_token: str, scope: str, expires_at) -> None:
     """
     Saves the access and refresh tokens to a local file.
 
     :param access_token: str
     :param refresh_token: str
+    :param scope: str
     """
-    expires_in = 3600  # Default expiration time, adjust as needed
-    expires_at = time.time() + expires_in
     tokens = {
-        'access_token': access_token,
-        'refresh_token': refresh_token,
-        'expires_at': expires_at
-    }
+        scope: {
+            'access_token': access_token,
+            'refresh_token': refresh_token,
+            'expires_at': expires_at
+            },
+        }
     with open(TOKEN_FILE_PATH, 'w') as f:
         json.dump(tokens, f)
+
+
+def _refresh_tokens_file(access_token: str, scope: str, expires_at) -> None:
+    """
+    Saves the access and refresh tokens to a local file.
+
+    :param access_token: str
+    :param scope: str
+    """
+    with open(TOKEN_FILE_PATH, 'r') as file:
+        tokens = json.load(file)
+
+    if scope in tokens and 'refresh_token' in tokens[scope]:
+        tokens[scope]['access_token'] = access_token
+        tokens[scope]['expires_at'] = expires_at
+        with open(TOKEN_FILE_PATH, 'w') as file:
+            json.dump(tokens, file, indent=4)
+    else:
+        print(f"Error: Scope '{scope}' or refresh_token not found in the tokens file.")

src/scraper.py

@@ -1,6 +1,6 @@
 import requests
 
-from auth import authenticate
+from auth import authenticate, simple_authenticate
 from database_handler import Database, Table
 
 db = Database('spotify_scraped.db')
@@ -20,8 +20,9 @@ def main():
 
     # Once a day
     all_track_ids = db.read_all_rows(Table.RECENTLY_PLAYED, 'track_id')
+    bearer_toke_simple = simple_authenticate()
     for track_id in all_track_ids:
-        response = _get_track_information(track_id=track_id, bearer_token=bearer_token)
+        response = _get_track_information(track_id=track_id[0], bearer_token=bearer_toke_simple)
         print(response)
 
     # Close the database connection