auto-claude: subtask-2-2 - Create API route for contact form submission

src/app/api/contact/route.ts

@@ -0,0 +1,127 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { supabaseRateLimiter } from '@/utils/rateLimitSupabase';
+
+interface ContactFormData {
+  name: string;
+  email: string;
+  message: string;
+}
+
+/**
+ * Extract client IP address from Next.js request headers
+ * Handles Vercel's forwarding headers and fallback scenarios
+ */
+function getClientIp(request: NextRequest): string {
+  // Check Vercel's forwarded IP header first
+  const forwardedFor = request.headers.get('x-forwarded-for');
+  if (forwardedFor) {
+    // x-forwarded-for may contain multiple IPs, take the first one
+    return forwardedFor.split(',')[0].trim();
+  }
+
+  // Check for real IP header
+  const realIp = request.headers.get('x-real-ip');
+  if (realIp) {
+    return realIp;
+  }
+
+  // Fallback to a default identifier for development
+  return 'unknown-ip';
+}
+
+/**
+ * Validate contact form data
+ */
+function validateFormData(data: unknown): data is ContactFormData {
+  if (!data || typeof data !== 'object') {
+    return false;
+  }
+
+  const formData = data as Record<string, unknown>;
+
+  return (
+    typeof formData.name === 'string' &&
+    formData.name.trim().length > 0 &&
+    typeof formData.email === 'string' &&
+    /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(formData.email) &&
+    typeof formData.message === 'string' &&
+    formData.message.trim().length > 0
+  );
+}
+
+/**
+ * POST /api/contact
+ * Handle contact form submissions with rate limiting
+ */
+export async function POST(request: NextRequest) {
+  try {
+    // Extract client IP for rate limiting
+    const clientIp = getClientIp(request);
+
+    // Check rate limit
+    const isRateLimited = await supabaseRateLimiter.isRateLimited(clientIp);
+
+    if (isRateLimited) {
+      const timeToReset = await supabaseRateLimiter.getTimeToReset(clientIp);
+      const retryAfterSeconds = Math.ceil(timeToReset / 1000);
+
+      return NextResponse.json(
+        {
+          error: 'Too many requests. Please try again later.',
+          retryAfter: retryAfterSeconds,
+        },
+        {
+          status: 429,
+          headers: {
+            'X-RateLimit-Remaining': '0',
+            'Retry-After': retryAfterSeconds.toString(),
+          },
+        }
+      );
+    }
+
+    // Parse and validate request body
+    const body = await request.json();
+
+    if (!validateFormData(body)) {
+      return NextResponse.json(
+        { error: 'Invalid form data. Please check all fields.' },
+        { status: 400 }
+      );
+    }
+
+    const formData = body as ContactFormData;
+
+    // Get remaining attempts for response headers
+    const remainingAttempts = await supabaseRateLimiter.getRemainingAttempts(clientIp);
+
+    // TODO: In a real implementation, you would:
+    // 1. Send email via a service like SendGrid, Resend, or AWS SES
+    // 2. Store the message in a database
+    // 3. Send a confirmation email to the user
+    // For now, we'll just simulate success
+
+    // Simulate processing delay
+    await new Promise(resolve => setTimeout(resolve, 500));
+
+    return NextResponse.json(
+      {
+        success: true,
+        message: 'Your message has been received. We will get back to you soon!',
+      },
+      {
+        status: 200,
+        headers: {
+          'X-RateLimit-Remaining': remainingAttempts.toString(),
+        },
+      }
+    );
+  } catch (error) {
+    console.error('Error processing contact form:', error);
+
+    return NextResponse.json(
+      { error: 'An unexpected error occurred. Please try again later.' },
+      { status: 500 }
+    );
+  }
+}