Add src/app/api/payment/process/route.ts

src/app/api/payment/process/route.ts

@@ -0,0 +1,204 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+interface PaymentRequest {
+  paymentMethod: string;
+  cardName: string;
+  cardNumber: string;
+  expiryDate: string;
+  cvv: string;
+  email: string;
+  phone: string;
+  amount: number;
+  currency: string;
+  items: Array<{
+    id: string;
+    name: string;
+    price: string;
+    quantity: number;
+  }>;
+  orderDetails: {
+    subtotal: string;
+    tax: string;
+    total: string;
+  };
+}
+
+interface PaymentResponse {
+  success: boolean;
+  transactionId?: string;
+  message: string;
+  order?: {
+    id: string;
+    amount: number;
+    currency: string;
+    status: string;
+  };
+}
+
+function validatePaymentData(data: PaymentRequest): { valid: boolean; error?: string } {
+  if (!data.cardName?.trim()) {
+    return { valid: false, error: 'Cardholder name is required' };
+  }
+
+  const cardNumberDigits = data.cardNumber.replace(/\D/g, '');
+  if (!/^\d{13,19}$/.test(cardNumberDigits)) {
+    return { valid: false, error: 'Invalid card number' };
+  }
+
+  if (!/^\d{2}\/\d{2}$/.test(data.expiryDate)) {
+    return { valid: false, error: 'Invalid expiry date format' };
+  }
+
+  if (!/^\d{3,4}$/.test(data.cvv)) {
+    return { valid: false, error: 'Invalid CVV' };
+  }
+
+  if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(data.email)) {
+    return { valid: false, error: 'Invalid email address' };
+  }
+
+  if (!data.phone?.trim()) {
+    return { valid: false, error: 'Phone number is required' };
+  }
+
+  if (data.amount <= 0) {
+    return { valid: false, error: 'Invalid payment amount' };
+  }
+
+  return { valid: true };
+}
+
+function luhnCheck(cardNumber: string): boolean {
+  const digits = cardNumber.replace(/\D/g, '');
+  let sum = 0;
+  let isEven = false;
+
+  for (let i = digits.length - 1; i >= 0; i--) {
+    let digit = parseInt(digits[i], 10);
+
+    if (isEven) {
+      digit *= 2;
+      if (digit > 9) {
+        digit -= 9;
+      }
+    }
+
+    sum += digit;
+    isEven = !isEven;
+  }
+
+  return sum % 10 === 0;
+}
+
+function generateTransactionId(): string {
+  return `TXN-${Date.now()}-${Math.random().toString(36).substr(2, 9).toUpperCase()}`;
+}
+
+export async function POST(request: NextRequest): Promise<NextResponse<PaymentResponse>> {
+  try {
+    const data: PaymentRequest = await request.json();
+
+    // Validate payment data
+    const validation = validatePaymentData(data);
+    if (!validation.valid) {
+      return NextResponse.json(
+        {
+          success: false,
+          message: validation.error || 'Validation failed'
+        },
+        { status: 400 }
+      );
+    }
+
+    // Validate card using Luhn algorithm
+    if (!luhnCheck(data.cardNumber)) {
+      return NextResponse.json(
+        {
+          success: false,
+          message: 'Invalid card number'
+        },
+        { status: 400 }
+      );
+    }
+
+    // Validate expiry date
+    const [month, year] = data.expiryDate.split('/');
+    const expiryDate = new Date(2000 + parseInt(year), parseInt(month) - 1);
+    if (expiryDate < new Date()) {
+      return NextResponse.json(
+        {
+          success: false,
+          message: 'Card has expired'
+        },
+        { status: 400 }
+      );
+    }
+
+    // Validate items and amount
+    if (!data.items || data.items.length === 0) {
+      return NextResponse.json(
+        {
+          success: false,
+          message: 'No items in order'
+        },
+        { status: 400 }
+      );
+    }
+
+    // In production, integrate with actual payment gateway here
+    // This is a mock processing example
+    const transactionId = generateTransactionId();
+
+    // Simulate payment processing delay
+    await new Promise(resolve => setTimeout(resolve, 1000));
+
+    // Mock fraud check - reject cards ending in 0002
+    const lastFourDigits = data.cardNumber.replace(/\D/g, '').slice(-4);
+    if (lastFourDigits === '0002') {
+      return NextResponse.json(
+        {
+          success: false,
+          message: 'Payment declined. Please try another card.'
+        },
+        { status: 402 }
+      );
+    }
+
+    // Log order for email notification
+    console.log('Payment Processing Log:', {
+      transactionId,
+      amount: data.amount,
+      currency: data.currency,
+      cardLast4: lastFourDigits,
+      email: data.email,
+      phone: data.phone,
+      itemCount: data.items.length,
+      timestamp: new Date().toISOString()
+    });
+
+    return NextResponse.json(
+      {
+        success: true,
+        transactionId,
+        message: 'Payment processed successfully',
+        order: {
+          id: transactionId,
+          amount: data.amount,
+          currency: data.currency,
+          status: 'completed'
+        }
+      },
+      { status: 200 }
+    );
+  } catch (error) {
+    console.error('Payment processing error:', error);
+
+    return NextResponse.json(
+      {
+        success: false,
+        message: 'Payment processing failed. Please try again.'
+      },
+      { status: 500 }
+    );
+  }
+}