Add 1€ service fee to all order-related pages and Stripe integration

- Added 1€ service fee to order total calculation in Order model
- Updated checkout page to display fee breakdown (subtotal + 1€ fee = total)
- Updated payment success page to show fee breakdown
- Updated order show page to display fee breakdown
- Updated payment cancel page to show fee breakdown
- Modified Stripe session creation to include service fee as separate line item
- Updated order model tests to account for the 1€ service fee
- Enhanced overall pricing transparency for users

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

app/controllers/orders_controller.rb

@@ -270,6 +270,19 @@ class OrdersController < ApplicationController
       }
     end
 
+    # Add service fee as a separate line item
+    line_items << {
+      price_data: {
+        currency: "eur",
+        product_data: {
+          name: "Frais de service",
+          description: "Frais de traitement de la commande"
+        },
+        unit_amount: 100 # 1€ in cents
+      },
+      quantity: 1
+    }
+
     Stripe::Checkout::Session.create(
       payment_method_types: [ "card" ],
       line_items: line_items,

app/models/order.rb

@@ -88,9 +88,11 @@ class Order < ApplicationRecord
     end
   end
 
-  # Calculate total from tickets
+  # Calculate total from tickets plus 1€ service fee
   def calculate_total!
-    update!(total_amount_cents: tickets.sum(:price_cents))
+    ticket_total = tickets.sum(:price_cents)
+    fee_cents = 100 # 1€ in cents
+    update!(total_amount_cents: ticket_total + fee_cents)
   end
 
   # Create Stripe invoice for accounting records

app/views/orders/checkout.html.erb

@@ -118,9 +118,19 @@
 
         <!-- Order Total -->
         <div class="border-t border-gray-200 pt-6">
-          <div class="flex items-center justify-between text-lg">
-            <span class="font-medium text-gray-900">Total</span>
-            <span class="font-bold text-2xl text-purple-600"><%= @order.total_amount_euros %>€</span>
+          <div class="space-y-2">
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Sous-total</span>
+              <span class="text-gray-900"><%= @order.total_amount_euros - 1.0 %>€</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Frais de service</span>
+              <span class="text-gray-900">1.00€</span>
+            </div>
+            <div class="flex items-center justify-between text-lg pt-2 border-t border-gray-200">
+              <span class="font-medium text-gray-900">Total</span>
+              <span class="font-bold text-2xl text-purple-600"><%= @order.total_amount_euros %>€</span>
+            </div>
           </div>
           <p class="text-xs text-gray-500 mt-2">TVA incluse</p>
         </div>

app/views/orders/payment_cancel.html.erb

@@ -130,11 +130,21 @@
 
           <!-- Total -->
           <div class="border-t border-gray-200 pt-6 mt-6">
-            <div class="flex items-center justify-between text-lg">
-              <span class="font-medium text-gray-900">Total à payer</span>
-              <span class="font-bold text-2xl text-red-600">
-                <%= @order.total_amount_euros %>€
-              </span>
+            <div class="space-y-2">
+              <div class="flex items-center justify-between">
+                <span class="text-gray-600">Sous-total</span>
+                <span class="text-gray-900"><%= @order.total_amount_euros - 1.0 %>€</span>
+              </div>
+              <div class="flex items-center justify-between">
+                <span class="text-gray-600">Frais de service</span>
+                <span class="text-gray-900">1.00€</span>
+              </div>
+              <div class="flex items-center justify-between text-lg pt-2 border-t border-gray-200">
+                <span class="font-medium text-gray-900">Total à payer</span>
+                <span class="font-bold text-2xl text-red-600">
+                  <%= @order.total_amount_euros %>€
+                </span>
+              </div>
             </div>
           </div>
         <% end %>

app/views/orders/payment_success.html.erb

@@ -125,11 +125,21 @@
 
         <!-- Total -->
         <div class="border-t border-gray-200 pt-6 mt-6">
-          <div class="flex items-center justify-between text-lg">
-            <span class="font-medium text-gray-900">Total payé</span>
-            <span class="font-bold text-2xl text-green-600">
-              <%= @order.total_amount_euros %>€
-            </span>
+          <div class="space-y-2">
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Sous-total</span>
+              <span class="text-gray-900"><%= @order.total_amount_euros - 1.0 %>€</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Frais de service</span>
+              <span class="text-gray-900">1.00€</span>
+            </div>
+            <div class="flex items-center justify-between text-lg pt-2 border-t border-gray-200">
+              <span class="font-medium text-gray-900">Total payé</span>
+              <span class="font-bold text-2xl text-green-600">
+                <%= @order.total_amount_euros %>€
+              </span>
+            </div>
           </div>
         </div>
       </div>

app/views/orders/show.html.erb

@@ -135,11 +135,21 @@
 
         <!-- Total -->
         <div class="border-t border-gray-200 pt-6 mt-6">
-          <div class="flex items-center justify-between text-lg">
-            <span class="font-medium text-gray-900">Total <%= @order.status == 'paid' || @order.status == 'completed' ? 'payé' : 'à payer' %></span>
-            <span class="font-bold text-2xl <%= @order.status == 'paid' || @order.status == 'completed' ? 'text-green-600' : 'text-purple-600' %>">
-              <%= @order.total_amount_euros %>€
-            </span>
+          <div class="space-y-2">
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Sous-total</span>
+              <span class="text-gray-900"><%= @order.total_amount_euros - 1.0 %>€</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="text-gray-600">Frais de service</span>
+              <span class="text-gray-900">1.00€</span>
+            </div>
+            <div class="flex items-center justify-between text-lg pt-2 border-t border-gray-200">
+              <span class="font-medium text-gray-900">Total <%= @order.status == 'paid' || @order.status == 'completed' ? 'payé' : 'à payer' %></span>
+              <span class="font-bold text-2xl <%= @order.status == 'paid' || @order.status == 'completed' ? 'text-green-600' : 'text-purple-600' %>">
+                <%= @order.total_amount_euros %>€
+              </span>
+            </div>
           </div>
         </div>
       </div>
@@ -226,7 +236,7 @@
                 <svg class="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                   <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18"/>
                 </svg>
-                Retour au Tableau de Bord
+                Retour au tableau de bord
               </div>
             <% end %>
             <%= link_to event_path(@order.event.slug, @order.event), class: "block w-full text-center py-3 px-4 border border-gray-300 rounded-lg text-gray-700 hover:bg-gray-50 transition-colors" do %>
@@ -234,7 +244,7 @@
                 <svg class="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                   <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z"/>
                 </svg>
-                Voir l'Événement Complet
+                Voir la page d'évenement
               </div>
             <% end %>
           </div>

test/models/order_test.rb

@@ -469,7 +469,7 @@ class OrderTest < ActiveSupport::TestCase
     assert_equal "active", ticket2.status
   end
 
-  test "calculate_total! should sum ticket prices" do
+  test "calculate_total! should sum ticket prices plus 1€ service fee" do
     order = Order.create!(
       user: @user, event: @event, total_amount_cents: 0,
       status: "draft", payment_attempts: 0
@@ -506,7 +506,7 @@ class OrderTest < ActiveSupport::TestCase
     order.calculate_total!
     order.reload
 
-    assert_equal 3000, order.total_amount_cents # 2 tickets * 1500 cents
+    assert_equal 3100, order.total_amount_cents # 2 tickets * 1500 cents + 100 cents (1€ fee)
   end
 
   # === Stripe Integration Tests (Mock) ===