Use Google Calendar API in Jumpstart Pro Rails

google_calendar_service.rb

require "google/apis/calendar_v3"

# To add the Google Calendar API to your project, you need to add the following line to your Gemfile:
# bundle add google-apis-calendar_v3
#
# Google Cloud Console Credential Settings:
# Authorized JavaScript origins: http://localhost:3000
# Authorized redirect URIs: http://localhost:3000/users/auth/google_oauth2/callback
# Update the above with your staging and production URLs
#
# In your credentials file, updated omniauth.google_oauth2 with your client id (public_key) and client secret (private_key)
# and the following scopes:
#     scope: 'profile,calendar.events'

class GoogleCalendarService
  Calendar = Google::Apis::CalendarV3

  def initialize(user)
    @user = user
    @connected_account =
      user.connected_accounts.find_by(provider: "google_oauth2")
    if connected?
      @calendar = Calendar::CalendarService.new
      @calendar.authorization = @connected_account.token
    end
  end

  def connected?
    @connected_account.present?
  end

  def create(summary, start_time, end_time, description: nil, attendees: [])
    raise "Not connected" unless connected?

    event = Calendar::Event.new(
      summary: summary,
      start: { date_time: start_time.iso8601 },
      end: { date_time: end_time.iso8601 },
      description: description,
      attendees: attendees.map { |email| { email: email } }
    )
    @calendar.insert_event("primary", event)
  end

  # list events from the user's primary calendar
  # if time_min is not specified, it will show upcoming events
  def list(time_min: nil, time_max: nil, limit: 1000) # rubocop:disable Metrics/MethodLength, Metrics/AbcSize, Metrics/CyclomaticComplexity
    raise "Not connected" unless connected?

    result = []
    page_token = nil
    time_min ||= Time.now
    puts "time_min: #{time_min}"
    puts "time_max: #{time_max}"
    while limit.positive?
      events =
        @calendar.list_events(
          "primary",
          max_results: [limit, 100].min,
          single_events: true,
          order_by: "startTime",
          time_min: time_min ? time_miniso8601 : nil,
          time_max: time_max ? time_max.iso8601 : nil,
          page_token: page_token,
          fields: "items(id,summary,start,end,description,organizer,attendees,reminders,htmlLink),next_page_token"
        )
      result += events.items if events.items.present?
      limit -= events.items.size
      page_token = events.next_page_token
      break unless page_token.present?
    end
    result
  end

  # gets all the events for today
  def today
    Time.use_zone(@user.time_zone) do
      list(
        time_min: Time.now.beginning_of_day,
        time_max: Time.now.end_of_day
      )
    end
  end

  # gets all the events for tomorrow
  def tomorrow
    Time.use_zone(@user.time_zone) do
      list(
        time_min: Time.now.tomorrow.beginning_of_day,
        time_max: Time.now.tomorrow.end_of_day
      )
    end
  end

  def this_week
    Time.use_zone(@user.time_zone) do
      list(
        time_min: Time.now.beginning_of_week,
        time_max: Time.now.end_of_week
      )
    end
  end

  def next_week
    Time.use_zone(@user.time_zone) do
      list(
        time_min: Time.now.next_week.beginning_of_week,
        time_max: Time.now.next_week.end_of_week
      )
    end
  end
end