fab-manager/app/controllers/api/reservations_controller.rb

class API::ReservationsController < API::ApiController
  before_action :authenticate_user!
  before_action :set_reservation, only: %i[show update]
  respond_to :json

  def index
    if params[:reservable_id] && params[:reservable_type] && params[:user_id]
      params[:user_id] = current_user.id unless current_user.is_admin?

      @reservations = Reservation.where(params.permit(:reservable_id, :reservable_type, :user_id))
    elsif params[:reservable_id] && params[:reservable_type] && current_user.is_admin?
      @reservations = Reservation.where(params.permit(:reservable_id, :reservable_type))
    else
      @reservations = []
    end
  end

  def show; end

  def create
    method = current_user.is_admin? ? :local : :stripe
    user_id = current_user.is_admin? ? reservation_params[:user_id] : current_user.id

    @reservation = Reservation.new(reservation_params)
    is_reserve = Reservations::Reserve.new(user_id)
                                      .pay_and_save(@reservation, method, coupon_params[:coupon_code])

    if is_reserve
      SubscriptionExtensionAfterReservation.new(@reservation).extend_subscription_if_eligible

      render :show, status: :created, location: @reservation
    else
      render json: @reservation.errors, status: :unprocessable_entity
    end
  rescue InvalidCouponError
    render json: { coupon_code: 'wrong coupon code or expired' }, status: :unprocessable_entity
  end

  def update
    authorize @reservation
    if @reservation.update(reservation_params)
      render :show, status: :ok, location: @reservation
    else
      render json: @reservation.errors, status: :unprocessable_entity
    end
  end

  private
  def set_reservation
    @reservation = Reservation.find(params[:id])
  end

  def reservation_params
    params.require(:reservation).permit(:user_id, :message, :reservable_id, :reservable_type, :card_token, :plan_id,
                                        :nb_reserve_places,
                                        tickets_attributes: %i[event_price_category_id booked],
                                        slots_attributes: %i[id start_at end_at availability_id offered])
  end

  def coupon_params
    params.permit(:coupon_code)
  end
end