openfoodnetwork/app/controllers/checkout_controller.rb

require 'open_food_network/last_used_address'

class CheckoutController < Spree::CheckoutController
  layout 'darkswarm'

  prepend_before_filter :check_hub_ready_for_checkout
  prepend_before_filter :check_order_cycle_expiry
  prepend_before_filter :require_order_cycle
  prepend_before_filter :require_distributor_chosen

  skip_before_filter :check_registration

  include OrderCyclesHelper
  include EnterprisesHelper

  def edit
  end

  def update
    if @order.update_attributes(object_params)
      check_order_for_phantom_fees
      fire_event('spree.checkout.update')
      while @order.state != "complete"
        if @order.state == "payment"
          return if redirect_to_paypal_express_form_if_needed
        end

        if advance_order_state(@order)
          state_callback(:after)
        else
          if @order.errors.present?
            flash[:error] = @order.errors.full_messages.to_sentence
          else
            flash[:error] = t(:payment_processing_failed)
          end
          update_failed
          return
        end
      end
      if @order.state == "complete" ||  @order.completed?
        flash[:success] = t(:order_processed_successfully)
          respond_to do |format|
            format.html do
              respond_with(@order, :location => order_path(@order))
            end
            format.js do
              render json: {path: order_path(@order)}, status: 200
            end
          end
      else
        update_failed
      end
    else
      update_failed
    end
  end


  private

  def check_order_for_phantom_fees
    phantom_fees = @order.adjustments.joins('LEFT OUTER JOIN spree_line_items ON spree_line_items.id = spree_adjustments.source_id').
    where("originator_type = 'EnterpriseFee' AND source_type = 'Spree::LineItem' AND spree_line_items.id IS NULL")

    if phantom_fees.any?
      Bugsnag.notify(RuntimeError.new("Phantom Fees"), {
        phantom_fees: {
          phantom_total: phantom_fees.sum(&:amount).to_s,
          phantom_fees: phantom_fees.as_json
        }
      })
    end
  end

  # Copied and modified from spree. Remove check for order state, since the state machine is
  # progressed all the way in one go with the one page checkout.
  def object_params
    # For payment step, filter order parameters to produce the expected nested attributes for a single payment and its source, discarding attributes for payment methods other than the one selected
    if params[:payment_source].present? && source_params = params.delete(:payment_source)[params[:order][:payments_attributes].first[:payment_method_id].underscore]
      params[:order][:payments_attributes].first[:source_attributes] = source_params
    end
    if (params[:order][:payments_attributes])
      params[:order][:payments_attributes].first[:amount] = @order.total
    end
    params[:order]
  end

  # Perform order.next, guarding against StaleObjectErrors
  def advance_order_state(order)
    tries ||= 3
    order.next

  rescue ActiveRecord::StaleObjectError
    retry unless (tries -= 1).zero?
    false
  end


  def update_failed
    clear_ship_address
    respond_to do |format|
      format.html do
        render :edit
      end
      format.js do
        render json: {errors: @order.errors, flash: flash.to_hash}.to_json, status: 400
      end
    end
  end

  # When we have a pickup Shipping Method, we clone the distributor address into ship_address before_save
  # We don't want this data in the form, so we clear it out
  def clear_ship_address
    unless current_order.shipping_method.andand.require_ship_address
      current_order.ship_address = Spree::Address.default
    end
  end

  def skip_state_validation?
    true
  end

  def load_order
    @order = current_order
    redirect_to main_app.shop_path and return unless @order and @order.checkout_allowed?
    raise_insufficient_quantity and return if @order.insufficient_stock_lines.present?
    redirect_to main_app.shop_path and return if @order.completed?
    before_address
    state_callback(:before)
  end

  def before_address
    associate_user

    lua = OpenFoodNetwork::LastUsedAddress.new(@order.email)
    last_used_bill_address = lua.last_used_bill_address.andand.clone
    last_used_ship_address = lua.last_used_ship_address.andand.clone

    preferred_bill_address, preferred_ship_address = spree_current_user.bill_address, spree_current_user.ship_address if spree_current_user.respond_to?(:bill_address) && spree_current_user.respond_to?(:ship_address)
    @order.bill_address ||= preferred_bill_address || last_used_bill_address || Spree::Address.default
    @order.ship_address ||= preferred_ship_address || last_used_ship_address || Spree::Address.default
  end

  def after_payment
    # object_params sets the payment amount to the order total, but it does this before
    # the shipping method is set. This results in the customer not being charged for their
    # order's shipping. To fix this, we refresh the payment amount here.
    @order.update_totals
    @order.payments.first.update_attribute :amount, @order.total
  end

  # Overriding Spree's methods
  def raise_insufficient_quantity
    flash[:error] = t(:spree_inventory_error_flash_for_insufficient_quantity)
    redirect_to cart_path
  end

  def redirect_to_paypal_express_form_if_needed
    return unless params[:order][:payments_attributes]

    payment_method = Spree::PaymentMethod.find(params[:order][:payments_attributes].first[:payment_method_id])
    return unless payment_method.kind_of?(Spree::Gateway::PayPalExpress)

    render json: {path: spree.paypal_express_url(payment_method_id: payment_method.id)}, status: 200
    true
  end
end