Add cash-on-delivery payment type with cart fee pipeline

composer.json

@@ -33,13 +33,15 @@
       "providers": [
         "Modules\\Core\\Providers\\CoreServiceProvider",
         "Modules\\Core\\Providers\\AuthServiceProvider",
-        "Modules\\Core\\Providers\\CustomerServiceProvider"
+        "Modules\\Core\\Providers\\CustomerServiceProvider",
+        "Modules\\Core\\Providers\\PaymentServiceProvider"
       ]
     }
   },
   "config": {
     "allow-plugins": {
-      "pestphp/pest-plugin": true
+      "pestphp/pest-plugin": true,
+      "php-http/discovery": true
     }
   }
 }

config/payment.php

@@ -0,0 +1,37 @@
+<?php
+
+use Modules\Core\Payment\Pipelines\Cart\ApplyCashOnDeliveryFee;
+
+return [
+    /*
+    |--------------------------------------------------------------------------
+    | Lunar payment types merged in by Boboko Core
+    |--------------------------------------------------------------------------
+    |
+    | These are merged into config('lunar.payments.types') so every app using
+    | boboko-core gets cash-on-delivery out of the box, without publishing
+    | Lunar's own config.
+    |
+    */
+    'types' => [
+        'cash-on-delivery' => [
+            'driver' => 'offline',
+            'authorized' => 'awaiting-payment',
+            'fee' => 0,
+        ],
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | Lunar cart pipeline additions
+    |--------------------------------------------------------------------------
+    |
+    | Appended to config('lunar.cart.pipelines.cart') after ApplyShipping so
+    | the cash-on-delivery fee is added to the shipping total before the
+    | final Calculate step sums everything up.
+    |
+    */
+    'cart_pipeline' => [
+        ApplyCashOnDeliveryFee::class,
+    ],
+];

src/Payment/Pipelines/Cart/ApplyCashOnDeliveryFee.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Modules\Core\Payment\Pipelines\Cart;
+
+use Closure;
+use Lunar\DataTypes\Price;
+use Lunar\Models\Contracts\Cart as CartContract;
+
+final class ApplyCashOnDeliveryFee
+{
+    /**
+     * Called just before cart totals are calculated.
+     *
+     * @param  Closure(CartContract): mixed  $next
+     */
+    public function handle(CartContract $cart, Closure $next): mixed
+    {
+        if (($cart->meta['payment_method'] ?? null) === 'cash-on-delivery') {
+            $fee = (int) config('lunar.payments.types.cash-on-delivery.fee', 0);
+
+            $cart->shippingTotal = new Price(
+                ($cart->shippingTotal?->value ?? 0) + $fee,
+                $cart->currency,
+                1
+            );
+        }
+
+        return $next($cart);
+    }
+}

src/Providers/PaymentServiceProvider.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Modules\Core\Providers;
+
+use Illuminate\Support\ServiceProvider;
+use Lunar\Pipelines\Cart\ApplyShipping;
+
+class PaymentServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        $this->mergeConfigFrom(__DIR__ . '/../../config/payment.php', 'payment');
+    }
+
+    public function boot(): void
+    {
+        config([
+            'lunar.payments.types' => array_merge(
+                config('lunar.payments.types', []),
+                config('payment.types', [])
+            ),
+        ]);
+
+        $cartPipeline = config('lunar.cart.pipelines.cart', []);
+        $insertAfter = array_search(ApplyShipping::class, $cartPipeline, true);
+
+        foreach (config('payment.cart_pipeline', []) as $pipe) {
+            if (in_array($pipe, $cartPipeline, true)) {
+                continue;
+            }
+
+            if ($insertAfter === false) {
+                $cartPipeline[] = $pipe;
+            } else {
+                array_splice($cartPipeline, $insertAfter + 1, 0, [$pipe]);
+                $insertAfter++;
+            }
+        }
+
+        config(['lunar.cart.pipelines.cart' => $cartPipeline]);
+    }
+}