deviras/event-manager/google_calendar.py

import os.path

from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build

SCOPES = ["https://www.googleapis.com/auth/calendar"]


def create_google_calendar_event(
    calendar_id, name, description, location, date, start_time, end_time
):

    creds = None

    # The file token.json stores the user's access and refresh tokens
    if os.path.exists("token.json"):
        creds = Credentials.from_authorized_user_file("token.json", SCOPES)

    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            print("Login to your Google account. [THIS IS A ONE TIME PROCESS]")
            flow = InstalledAppFlow.from_client_secrets_file("credentials.json", SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open("token.json", "w") as token:
            token.write(creds.to_json())

    try:
        service = build("calendar", "v3", credentials=creds)
        start = f"{date}T{start_time}:00"
        end = f"{date}T{end_time}:00"
        event = {
            "summary": name,
            "location": location,
            "description": description,
            "start": {
                "dateTime": start,
                "timeZone": "Asia/Kolkata",
            },
            "end": {
                "dateTime": end,
                "timeZone": "Asia/Kolkata",
            },
        }

        event = service.events().insert(calendarId=calendar_id, body=event).execute()

        print("Calendar event created: %s" % (event.get("htmlLink")))
        return event

    except Exception as e:
        print(e)
        return None