Add Google Calendar integration with display manager. Includes calendar manager implementation, configuration updates, and registration script.

calendar_registration.py

@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+import os
+import json
+from google_auth_oauthlib.flow import InstalledAppFlow
+from google.oauth2.credentials import Credentials
+from google.auth.transport.requests import Request
+import pickle
+
+# If modifying these scopes, delete the file token.pickle.
+SCOPES = ['https://www.googleapis.com/auth/calendar.readonly']
+
+def load_config():
+    with open('config/config.json', 'r') as f:
+        return json.load(f)
+
+def save_credentials(creds, token_path):
+    # Save the credentials for the next run
+    with open(token_path, 'wb') as token:
+        pickle.dump(creds, token)
+
+def main():
+    config = load_config()
+    calendar_config = config.get('calendar', {})
+    
+    creds_file = calendar_config.get('credentials_file', 'credentials.json')
+    token_file = calendar_config.get('token_file', 'token.pickle')
+    
+    creds = None
+    # The file token.pickle stores the user's access and refresh tokens
+    if os.path.exists(token_file):
+        print("Existing token found, but you may continue to generate a new one.")
+        choice = input("Generate new token? (y/n): ")
+        if choice.lower() != 'y':
+            print("Keeping existing token. Exiting...")
+            return
+
+    # If there are no (valid) credentials available, let the user log in.
+    if not os.path.exists(creds_file):
+        print(f"Error: No credentials file found at {creds_file}")
+        print("Please download the credentials file from Google Cloud Console")
+        print("1. Go to https://console.cloud.google.com")
+        print("2. Create a project or select existing project")
+        print("3. Enable the Google Calendar API")
+        print("4. Configure the OAuth consent screen (select TV and Limited Input Device)")
+        print("5. Create OAuth 2.0 credentials")
+        print("6. Download the credentials and save as credentials.json")
+        return
+
+    # Create the flow using the client secrets file from the Google API Console
+    flow = InstalledAppFlow.from_client_secrets_file(
+        creds_file, SCOPES,
+        # Specify TV and Limited Input Device flow
+        redirect_uri='urn:ietf:wg:oauth:2.0:oob'
+    )
+
+    # Generate URL for authorization
+    auth_url, _ = flow.authorization_url(prompt='consent')
+    
+    print("\nPlease visit this URL to authorize this application:")
+    print(auth_url)
+    print("\nAfter authorizing, you will receive a code. Enter that code below:")
+    
+    code = input("Enter the authorization code: ")
+    
+    # Exchange the authorization code for credentials
+    flow.fetch_token(code=code)
+    creds = flow.credentials
+
+    # Save the credentials
+    save_credentials(creds, token_file)
+    print(f"\nCredentials saved successfully to {token_file}")
+    print("You can now run the LED Matrix display with calendar integration!")
+
+if __name__ == '__main__':
+    main()