feat(api): implement GET and POST endpoints for managing items associated with a specific URL

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

@@ -0,0 +1,95 @@
+//Handles GET (fetch items) and POST (create/update item) for a specific URL
+import { NextRequest, NextResponse } from 'next/server';
+import { getItemsByUrl, insertItemByUrl, insertUrl } from '@/lib/database';
+import { Item } from '@/types/database';
+
+// GET /api/urls/[encodedUrl]/items - Fetch items 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('[SERVER] Received request for URL:', url);
+
+  try {
+    const items = await getItemsByUrl(url);
+    console.log('[SERVER] Returning', items.length, 'items for URL:', url);
+    
+    return NextResponse.json(items, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    });
+  } catch (error) {
+    console.error('[SERVER ERROR] Failed to fetch items for', url, ':', error);
+    
+    return NextResponse.json(
+      { 
+        error: 'Failed to fetch items',
+        details: error instanceof Error ? error.message : 'Unknown error',
+        url: url
+      },
+      { status: 500 }
+    );
+  }
+}
+
+// POST /api/urls/[encodedUrl]/items - Create/update an item
+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 item: Item = await request.json();
+    const itemId = item.id;
+    
+    // Request logging
+    console.log('[API] Received item request - URL:', url, 'Item ID:', itemId);
+    
+    // Raw JSON logging
+    const rawJson = JSON.stringify(item);
+    console.log('[API] Raw request JSON:', rawJson);
+
+    // Validate item data
+    if (!item.id || typeof item.name !== 'string' || typeof item.description !== 'string') {
+      console.log('[API] Validation error: Invalid item data');
+      return NextResponse.json(
+        { error: 'Invalid item data', item: item },
+        { status: 400 }
+      );
+    }
+
+    // Ensure URL exists in database
+    await insertUrl(url);
+
+    // Insert/update the item
+    await insertItemByUrl(url, item);
+    
+    console.log('[API] Successfully saved item ID:', itemId);
+    
+    return NextResponse.json(item, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    });
+  } catch (error) {
+    console.log('[API] Database error:', error);
+    
+    return NextResponse.json(
+      { 
+        error: 'Database error',
+        details: error instanceof Error ? error.message : 'Unknown error',
+        url: url
+      },
+      { status: 400 }
+    );
+  }
+}