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fetch_outlook_events.py

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+import os
+import msal
+import requests
+import json
+from datetime import datetime
+from dateutil import parser
+
+# Read Azure app credentials from environment variables
+client_id = os.getenv('AZURE_CLIENT_ID')
+tenant_id = os.getenv('AZURE_TENANT_ID')
+
+if not client_id or not tenant_id:
+    raise ValueError("Please set the AZURE_CLIENT_ID and AZURE_TENANT_ID environment variables.")
+
+# Authentication
+authority = f'https://login.microsoftonline.com/{tenant_id}'
+scopes = ['https://graph.microsoft.com/Calendars.Read']
+
+app = msal.PublicClientApplication(client_id, authority=authority)
+flow = app.initiate_device_flow(scopes=scopes)
+if 'user_code' not in flow:
+    raise Exception("Failed to create device flow")
+print(flow['message'])
+token_response = app.acquire_token_by_device_flow(flow)
+
+if 'access_token' not in token_response:
+    raise Exception("Failed to acquire token")
+
+access_token = token_response['access_token']
+
+# Fetch events with pagination and expand recurring events
+headers = {'Authorization': f'Bearer {access_token}'}
+events_url = 'https://graph.microsoft.com/v1.0/me/events?$top=100&$expand=instances'
+events = []
+
+while events_url:
+    response = requests.get(events_url, headers=headers)
+    response_data = response.json()
+    events.extend(response_data.get('value', []))
+    events_url = response_data.get('@odata.nextLink')
+
+# Save events to a file in iCalendar format
+with open('outlook_events.ics', 'w') as f:
+    f.write("BEGIN:VCALENDAR\nVERSION:2.0\n")
+    for event in events:
+        if 'start' in event and 'end' in event:
+            start = parser.isoparse(event['start']['dateTime'])
+            end = parser.isoparse(event['end']['dateTime'])
+            f.write(f"BEGIN:VEVENT\nSUMMARY:{event['subject']}\n")
+            f.write(f"DTSTART:{start.strftime('%Y%m%dT%H%M%S')}\n")
+            f.write(f"DTEND:{end.strftime('%Y%m%dT%H%M%S')}\n")
+            f.write("END:VEVENT\n")
+    f.write("END:VCALENDAR\n")