Add PayPal checkout provider

app/Http/Requests/PayPal/PayPalCaptureRequest.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Http\Requests\PayPal;
+
+use App\Models\CheckoutSession;
+use Illuminate\Foundation\Http\FormRequest;
+
+class PayPalCaptureRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        $user = $this->user();
+
+        if (! $user) {
+            return false;
+        }
+
+        $sessionId = $this->input('checkout_session_id');
+
+        if (! is_string($sessionId) || $sessionId === '') {
+            return false;
+        }
+
+        $session = CheckoutSession::find($sessionId);
+
+        if (! $session) {
+            return false;
+        }
+
+        return (int) $session->user_id === (int) $user->id;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'checkout_session_id' => ['required', 'uuid', 'exists:checkout_sessions,id'],
+            'order_id' => ['required', 'string'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'checkout_session_id.required' => 'Checkout-Session fehlt.',
+            'order_id.required' => 'Order ID fehlt.',
+        ];
+    }
+}

app/Http/Requests/PayPal/PayPalCheckoutRequest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Http\Requests\PayPal;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class PayPalCheckoutRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return (bool) $this->user();
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'package_id' => ['required', 'exists:packages,id'],
+            'return_url' => ['nullable', 'url'],
+            'cancel_url' => ['nullable', 'url'],
+            'coupon_code' => ['nullable', 'string', 'max:64'],
+            'accepted_terms' => ['required', 'boolean', 'accepted'],
+            'locale' => ['nullable', 'string', 'max:10'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'package_id.exists' => 'Das ausgewählte Paket ist ungültig.',
+            'accepted_terms.accepted' => 'Bitte akzeptiere die Nutzungsbedingungen.',
+        ];
+    }
+}