This Python script allows you to bulk-add events to your Google Calendar by reading event data from a JSON file. It utilizes the Google Calendar API v3 and Pydantic for data validation.

• Adds multiple events from a structured JSON file.

• Supports specifying start/end times or creating all-day events.

• Allows setting event summaries, descriptions, and locations.

• Configurable reminders (popup or email) for each event.

• Uses OAuth 2.0 for secure authentication with Google Calendar.

• Validates the input JSON format using Pydantic.

• Flexible command-line arguments for specifying input file, credentials, and target calendar.

1. Python 3: The script is written for Python 3. Ensure you have it installed. The script includes a shebang #!/usr/bin/env python3 for direct execution on Unix-like systems.

2. Google Account: You need a Google account to access Google Calendar.

3. Google Cloud Project & API Credentials:

   • Go to the Google Cloud Console.

   • Create a new project or select an existing one.

   • Enable the Google Calendar API for your project.

   • Create OAuth 2.0 Client ID credentials:

     • Select Desktop app as the application type.

     • Give it a name (e.g., “Calendar Script”).

     • Download the credentials JSON file. Rename it to credentials.json (or use a different name and specify it with the --credentials flag).

1. Clone the repository (or download the script):

   bash

   git clone https://github.com/tashifkhan/Calender-Event-Adding-Script/
   cd Calender-Event-Adding-Script
   

   Or simply save the script code as a .py file (e.g., add_calendar_events.py).

2. Place Credentials File: Put the downloaded credentials.json file in the same directory as the script, or note its path to use with the --credentials flag.

3. Install Dependencies: Create a requirements.txt file with the following content:

   txt

   google-api-python-client
   google-auth-httplib2
   google-auth-oauthlib
   pydantic
   

   Then, install the required packages using pip:

   bash

   pip install -r requirements.txt
   

4. (Optional) Make the script executable (macOS/Linux):

   bash

   chmod +x add_calendar_events.py
   

The script expects a JSON file containing a single top-level key "events" which holds a list of event objects. Each event object should have the following structure:

{
    "events": [
        {
            "date": "YYYY-MM-DD",             # Required: Event date
            "start_time": "HH:MM",            # Optional: Start time (24-hour format). If omitted (with end_time), creates an all-day event.
            "end_time": "HH:MM",              # Optional: End time (24-hour format). Required if start_time is present.
            "summary": "Event Title",         # Required: The main title/summary of the event.
            "description": "More details...", # Optional: A longer description for the event.
            "location": "Event Location",     # Optional: Physical location or meeting link.
            "reminders": {                    # Optional: Reminder settings. If omitted, calendar defaults are used.
                "method": "popup" or "email", # Required if reminders object is present: Type of reminder.
                "minutes": 30                 # Required if reminders object is present: Minutes before event to remind.
            }
        },
        {
            "date": "2025-05-05",
            "summary": "Project Deadline",   # Example of an all-day event (no start/end time)
            "description": "Submit final deliverables",
            "reminders": {
                "method": "popup",
                "minutes": 120
            }
        }
        # ... more event objects
    ]
}

Example JSON (events.json):

{
    "events": [
        {
            "date": "2025-04-20",
            "start_time": "10:00",
            "end_time": "11:00",
            "summary": "Meeting with Team",
            "description": "Discuss project progress",
            "location": "Conference Room A",
            "reminders": {
                "method": "popup",
                "minutes": 30
            }
        },
        {
            "date": "2025-05-01",
            "start_time": "14:00",
            "end_time": "15:30",
            "summary": "Client Presentation",
            "description": "Present the new design",
            "location": "Client's Office",
            "reminders": {
                "method": "email",
                "minutes": 60
            }
        },
        {
            "date": "2025-05-05",
            "summary": "Project Deadline",
            "description": "Submit final deliverables",
            "reminders": {
                "method": "popup",
                "minutes": 120
            }
        }
    ]
}

Run the script from your terminal, providing the path to your JSON event file.

Basic Usage (using defaults):

./add_calendar_events.py path/to/your/events.json

(Assumes credentials.json is in the same directory and adds to the primary calendar)

Specifying Credentials File:

./add_calendar_events.py path/to/your/events.json --credentials /path/to/your/client_secrets.json

Specifying Target Calendar ID:

./add_calendar_events.py path/to/your/events.json --calendar-id your_calendar_id@group.calendar.google.com

(Replace your_calendar_id@... with the actual ID found in your Google Calendar settings)

Using All Options:

./add_calendar_events.py events.json --credentials client_secrets.json --calendar-id secondary_calendar@group.calendar.google.com

Command-Line Arguments:

• json_file_path (Required): Positional argument for the path to the input JSON file.

• --credentials (Optional): Path to the Google API credentials file. Defaults to credentials.json in the script’s directory.

• --calendar-id (Optional): The ID of the calendar to add events to. Defaults to primary (the user’s main calendar).

• First Run: When you run the script for the first time, it will open a web browser window asking you to log in to your Google Account and grant the script permission to manage your calendar events.

• token.json: After successful authorization, the script creates a token.json file in the same directory. This file stores your access and refresh tokens, so you don’t have to re-authorize every time.

• Security: Do NOT share your credentials.json or token.json files. Add token.json to your .gitignore file if using Git.

• Token Refresh: The script attempts to refresh the access token if it expires. If refreshing fails (e.g., permissions revoked), it will delete the token.json file and prompt you to re-authenticate.

The required Python packages are listed in requirements.txt:

• google-api-python-client: Google API Client Library for Python.

• google-auth-httplib2: Google Authentication Library for Python with httplib2.

• google-auth-oauthlib: Google Authentication Library for Python using OAuthlib.

• pydantic: Data validation and settings management using Python type annotations.

Feel free to open issues or submit pull requests if you find bugs or have suggestions for improvements.

MIT LICENSE