Use named value on voucher submit button to distinguish between submi…

…ssion types

app/controllers/split_checkout_controller.rb

@@ -30,11 +30,7 @@ def edit
   end
 
   def update
-    if add_voucher
-      return render_voucher_section
-    elsif @order.errors.present?
-      return render_error
-    end
+    return process_voucher if params[:apply_voucher].present?
 
     if confirm_order || update_order
       return if performed?
@@ -196,8 +192,19 @@ def shipping_method_ship_address_not_required?
     selected_shipping_method.first.require_ship_address == false
   end
 
+  def process_voucher
+    if add_voucher
+      render_voucher_section
+    elsif @order.errors.present?
+      render_error
+    end
+  end
+
   def add_voucher
-    return unless payment_step? && params.dig(:order, :voucher_code).present?
+    if params.dig(:order, :voucher_code).blank?
+      @order.errors.add(:voucher, I18n.t('split_checkout.errors.voucher_not_found'))
+      return false
+    end
 
     # Fetch Voucher
     voucher = Voucher.find_by(code: params[:order][:voucher_code], enterprise: @order.distributor)

app/views/split_checkout/_voucher_section.html.haml

@@ -17,4 +17,4 @@
                 = t("split_checkout.step2.voucher.warning_forfeit_remaining_amount")
         - else
           = text_field_tag "[order][voucher_code]", params.dig(:order, :voucher_code), data: { action: "input->toggle-button-disabled#inputIsChanged", }, placeholder: t("split_checkout.step2.voucher.placeholder") , class: "voucher"
-          = submit_tag t("split_checkout.step2.voucher.apply"), disabled: true, class: "button cancel voucher",  data: { "toggle-button-disabled-target": "button" }, id: "testdisable"
+          = submit_tag t("split_checkout.step2.voucher.apply"), name: "apply_voucher", disabled: true, class: "button cancel voucher",  data: { "toggle-button-disabled-target": "button" }, id: "testdisable"