add pagination

src/app/api/posts/route.ts

@@ -11,8 +11,13 @@ export async function GET(request: NextRequest) {
         const url = new URL(request.url);
         const parentId = url.searchParams.get('parentId');
 
+        // Pagination parameters
+        const page = parseInt(url.searchParams.get('page') || '1');
+        const pageSize = parseInt(url.searchParams.get('pageSize') || '10');
+        const skip = (page - 1) * pageSize;
+
         // Build query
-        let query = postRepository.createQueryBuilder('post')
+        let queryBuilder = postRepository.createQueryBuilder('post')
             .leftJoinAndSelect('post.user', 'user')
             .leftJoinAndSelect('post.parent', 'parent')
             .orderBy('post.createdAt', 'DESC');
@@ -21,16 +26,36 @@ export async function GET(request: NextRequest) {
         if (parentId) {
             if (parentId === 'null') {
                 // Get root posts (no parent)
-                query = query.where('post.parentId IS NULL');
+                queryBuilder = queryBuilder.where('post.parentId IS NULL');
             } else {
                 // Get children of specific parent
-                query = query.where('post.parentId = :parentId', { parentId });
+                queryBuilder = queryBuilder.where('post.parentId = :parentId', { parentId });
             }
         }
 
-        const posts = await query.getMany();
+        // Get total count for pagination
+        const totalCount = await queryBuilder.getCount();
 
-        return NextResponse.json(posts);
+        // Apply pagination
+        queryBuilder = queryBuilder
+            .skip(skip)
+            .take(pageSize);
+
+        // Execute query
+        const posts = await queryBuilder.getMany();
+
+        // Calculate total pages
+        const totalPages = Math.ceil(totalCount / pageSize);
+
+        return NextResponse.json({
+            data: posts,
+            pagination: {
+                page,
+                pageSize,
+                totalCount,
+                totalPages
+            }
+        });
     } catch (error) {
         console.error('Error fetching posts:', error);
         return NextResponse.json(