Simple Calendar Events

This was a take-home assignment for a job I had applied for.

Easily access your Google Calendar events for today, classified by calendar names.

As a user, I want to have my Google Calendar events for today listed on a Web interface, classified by calendar names
When a user connects the Google account, all the calendars and events are imported to the App.
The subsequent events which get created/updated/deleted are sync'd to the app automatically
Using the Google Calendar APIs directly rather than using the gem like google-api-client would be preferred.

Implementation Details

Ruby on Rails app with PostreSQL as database
Implements a basic authentication system using Google OAuth. (without passwords)
Uses OAuth2 flow for authorization to user's resources (calendars/events)
Implements a service to talk with Google Calendars API which handles:
- fetching calendars for a user
- fetching events for a calendar of user
- registering webhooks for listening to changes to events/calendars
Does not use background processing jobs for any tasks yet
- potential to use for some use-cases
Uses Rspec for testing
- Test coverage still low

Since the whole code was written under a short deadline; the codebase still needed a few changes when it was submitted.
Please take a look at Issues section of the Github repository.