community: Add Google Calendar Toolkit

[jorge-jrzz]

Description: This PR implements the integration with Google Calendar to LangChain, which allows the functionality to manage in different ways the events in the calendar.

This toolkit allows the following with the following options:

• Create events:
  • summary
  • start_datetime
  • end_datetime
  • calendar_id
  • timezone
  • recurrence
  • location
  • description
  • attendees
  • reminders
  • conference_data
  • color_id
  • transparency
• Update events (with the same options as for creating events)
• Delete events:
  • send_updates
• Move events between calendars
  • send_updates
• Serach events:
  • min_datetime
  • max_datetime
  • max_results
  • single_events
  • query
• Get calendars info

Issue: #10536
Discussion: #17586
PR: #652

Dependencies: None

Twitter handle: @jorge_jrzz

• Add tests and docs

Appendix:
The main inspiration was the Gmail toolkit and the Office365 toolkit (#6306)

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Name	Status	Preview	Comments	Updated (UTC)
langchain	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 10, 2024 5:30pm

[Maiki2002]

Great job!!!!

[ivangv0505]

Very good job, congrats!

[jorge-jrzz]

What do you think about this, @baskaryan @ccurme ?

[efriis]

asking the google folks if the google-auth-httplib2 library is recommended or not because their readme is a bit unclear.

might be good to host this out of the langchain-google-community package instead (so the experts can review it) - but will take a look when they get back to me!

[efriis]

they got back to me! google-auth-httplib2 is likely EOL (it was a transition package), and the recommended alternative is google-auth.

Would you be able to swap out for the non-EOL auth package in the next few days, or would it make sense to close this and reopen when that's in (or even file an issue with this as a reference implementation)?

[jorge-jrzz]

I just saw your message about google-auth-httplib2 being marked as EOL and the recommended package being google-auth. Thanks a lot for confirming that.
I'm going to make the switch to the recommended package in the next few days, which involves updating dependencies in the code and checking that all current functionality still works correctly with google-auth.

Thanks for taking the time to check it out!

[efriis]

amazing thank you! Will convert this to draft, and mark as "ready for review" when you're ready again!