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

@@ -118,10 +118,20 @@
 
         <!-- Order Total -->
         <div class="border-t border-gray-200 pt-6">
-          <div class="flex items-center justify-between text-lg">
+          <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>
       </div>

app/views/orders/payment_cancel.html.erb

@@ -130,13 +130,23 @@
 
           <!-- Total -->
           <div class="border-t border-gray-200 pt-6 mt-6">
-            <div class="flex items-center justify-between text-lg">
+            <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 %>
       </div>
 

app/views/orders/payment_success.html.erb

@@ -125,7 +125,16 @@
 
         <!-- Total -->
         <div class="border-t border-gray-200 pt-6 mt-6">
-          <div class="flex items-center justify-between text-lg">
+          <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 %>€
@@ -133,6 +142,7 @@
             </div>
           </div>
         </div>
+      </div>
 
       <!-- Actions & Ticket Access -->
       <div class="bg-white rounded-2xl shadow-xl p-6 md:p-8 h-fit">

app/views/orders/show.html.erb

@@ -135,7 +135,16 @@
 
         <!-- Total -->
         <div class="border-t border-gray-200 pt-6 mt-6">
-          <div class="flex items-center justify-between text-lg">
+          <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 %>€
@@ -143,6 +152,7 @@
             </div>
           </div>
         </div>
+      </div>
 
       <!-- Actions & Ticket Access -->
       <div class="bg-white rounded-2xl shadow-xl p-6 md:p-8 h-fit">
@@ -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) ===