Delete birthday events from google calendar

delete_birthdays_google.py

"""
I was really annoyed when facebook synced birthdays to google calendar as events which filled up the entire calendar
with no easy way to delete/hide them.

This script does exactly that. 
"""

from apiclient.discovery import build
from httplib2 import Http
from oauth2client import file, client, tools
import datetime

# See step 1 of https://developers.google.com/calendar/quickstart/python
credentials_json_filepath = '/storage/Downloads/client_secret.json'

# Setup the Calendar API - https://developers.google.com/calendar/quickstart/python
def obtain_service():
    SCOPES = 'https://www.googleapis.com/auth/calendar'
    store = file.Storage('credentials.json')
    creds = store.get()
    if not creds or creds.invalid:
        flow = client.flow_from_clientsecrets(credentials_json_filepath, SCOPES)
        creds = tools.run_flow(flow, store)
    service = build('calendar', 'v3', http=creds.authorize(Http()))
    return service

def is_birthday_event(event):
    return 'birthday' in event['summary'].lower()

service = obtain_service()
now = datetime.datetime.utcnow().isoformat() + 'Z' # 'Z' indicates UTC time
service_events = service.events()

# get up to 1000 events from now
events_result = service_events.list(calendarId='primary', timeMin=now,
                                      maxResults=1000, singleEvents=True,
                                      orderBy='startTime').execute()
events = events_result.get('items', [])

# delete them - https://developers.google.com/calendar/v3/reference/events/delete
for event in events:
    if is_birthday_event(event):
        response = service_events.delete(calendarId='primary',eventId=event['id']).execute()