90 lines
3.5 KiB
Python
90 lines
3.5 KiB
Python
import os
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import msal
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import requests
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import json
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from datetime import datetime
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from dateutil import parser
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from dateutil.tz import UTC
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# Read Azure app credentials from environment variables
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client_id = os.getenv('AZURE_CLIENT_ID')
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tenant_id = os.getenv('AZURE_TENANT_ID')
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if not client_id or not tenant_id:
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raise ValueError("Please set the AZURE_CLIENT_ID and AZURE_TENANT_ID environment variables.")
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# Token cache
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cache = msal.SerializableTokenCache()
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cache_file = 'token_cache.bin'
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if os.path.exists(cache_file):
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cache.deserialize(open(cache_file, 'r').read())
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# Authentication
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authority = f'https://login.microsoftonline.com/{tenant_id}'
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scopes = ['https://graph.microsoft.com/Calendars.Read']
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app = msal.PublicClientApplication(client_id, authority=authority, token_cache=cache)
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accounts = app.get_accounts()
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if accounts:
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token_response = app.acquire_token_silent(scopes, account=accounts[0])
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else:
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flow = app.initiate_device_flow(scopes=scopes)
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if 'user_code' not in flow:
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raise Exception("Failed to create device flow")
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print(flow['message'])
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token_response = app.acquire_token_by_device_flow(flow)
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if 'access_token' not in token_response:
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raise Exception("Failed to acquire token")
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# Save token cache
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with open(cache_file, 'w') as f:
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f.write(cache.serialize())
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access_token = token_response['access_token']
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# Fetch events with pagination and expand recurring events
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headers = {'Authorization': f'Bearer {access_token}'}
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events_url = 'https://graph.microsoft.com/v1.0/me/events?$top=100&$expand=instances'
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events = []
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print("Fetching events...")
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while events_url:
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response = requests.get(events_url, headers=headers)
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response_data = response.json()
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events.extend(response_data.get('value', []))
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print(f"Fetched {len(events)} events so far...", end='\r')
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events_url = response_data.get('@odata.nextLink')
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# Save events to a file in iCalendar format
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output_file = f'output_ics/outlook_events_latest.ics'
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print(f"Saving events to {output_file}...")
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with open(output_file, 'w') as f:
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f.write("BEGIN:VCALENDAR\nVERSION:2.0\n")
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for event in events:
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if 'start' in event and 'end' in event:
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start = parser.isoparse(event['start']['dateTime'])
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end = parser.isoparse(event['end']['dateTime'])
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f.write(f"BEGIN:VEVENT\nSUMMARY:{event['subject']}\n")
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f.write(f"DTSTART:{start.strftime('%Y%m%dT%H%M%S')}\n")
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f.write(f"DTEND:{end.strftime('%Y%m%dT%H%M%S')}\n")
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if 'recurrence' in event and event['recurrence']: # Check if 'recurrence' exists and is not None
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for rule in event['recurrence']:
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if rule.startswith('RRULE'):
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rule_parts = rule.split(';')
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new_rule_parts = []
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for part in rule_parts:
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if part.startswith('UNTIL='):
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until_value = part.split('=')[1]
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until_date = parser.isoparse(until_value)
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if start.tzinfo is not None and until_date.tzinfo is None:
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until_date = until_date.replace(tzinfo=UTC)
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new_rule_parts.append(f"UNTIL={until_date.strftime('%Y%m%dT%H%M%SZ')}")
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else:
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new_rule_parts.append(part)
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rule = ';'.join(new_rule_parts)
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f.write(f"{rule}\n")
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f.write("END:VEVENT\n")
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f.write("END:VCALENDAR\n")
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