feat(api): add GET and POST endpoints for managing properties associated with a URL

src/app/api/urls/[encodedUrl]/properties/route.ts

@@ -0,0 +1,86 @@
+//property management API Route Handles GET (fetch properties) and POST (add property) for a URL
+import { NextRequest, NextResponse } from 'next/server';
+import { getSelectedProperties, addSelectedProperty, insertUrl } from '@/lib/database';
+
+// GET /api/urls/[encodedUrl]/properties - Get selected properties for a URL
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ encodedUrl: string }> }
+) {
+  // Await params before accessing properties
+  const resolvedParams = await params;
+  const url = decodeURIComponent(resolvedParams.encodedUrl);
+  console.log('[API] Getting selected properties for URL:', url);
+
+  try {
+    const properties = await getSelectedProperties(url);
+    console.log('[API] Returning', properties.length, 'properties for URL:', url);
+    
+    return NextResponse.json(properties, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    });
+  } catch (error) {
+    console.error('[API] Failed to fetch properties for URL:', url, error);
+    
+    return NextResponse.json(
+      { 
+        error: 'Failed to fetch properties',
+        details: error instanceof Error ? error.message : 'Unknown error',
+        url: url
+      },
+      { status: 500 }
+    );
+  }
+}
+
+// POST /api/urls/[encodedUrl]/properties - Add a selected property to a URL
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ encodedUrl: string }> }
+) {
+  // Await params before accessing properties
+  const resolvedParams = await params;
+  const url = decodeURIComponent(resolvedParams.encodedUrl);
+  
+  try {
+    const property: string = await request.json();
+    
+    console.log('[API] Adding property', property, 'to URL', url);
+
+    // Validate property data
+    if (!property || typeof property !== 'string') {
+      console.log('[API] Validation error: Invalid property data');
+      return NextResponse.json(
+        { error: 'Invalid property data', property: property },
+        { status: 400 }
+      );
+    }
+
+    // Ensure URL exists in database
+    await insertUrl(url);
+
+    // Add the selected property
+    await addSelectedProperty(url, property);
+    
+    console.log('[API] Successfully added property:', property);
+    
+    return NextResponse.json(
+      { message: 'Property added', property: property },
+      { status: 200 }
+    );
+  } catch (error) {
+    console.log('[API] Error adding property:', error);
+    
+    return NextResponse.json(
+      { 
+        error: 'Failed to add property',
+        details: error instanceof Error ? error.message : 'Unknown error',
+        url: url
+      },
+      { status: 500 }
+    );
+  }
+}