require 'icalendar'
require 'time'

# Contains functionality for generating schedules.
class SchedulesController < ApplicationController
  resource_description do
    short 'Endpoints for generating iCal files'
  end
  # Render an iCal file containing the schedules of all the
  # course sections with the given CRNs.
  api :GET, '/schedules', 'Generate an iCal file with events for the given CRNs'
  param :crns, String, desc: 'Comma separated list of CRNs to include as events in the calendar', required: true
  def index
    crns = params["crns"].split ','
    @schedule = Schedule.new crns
    render plain: @schedule.to_ical # render a plaintext iCal file
  end
end