feat: add like/unlike toggle API for rooms

src/app/api/rooms/[id]/likes/route.ts

@@ -0,0 +1,54 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { db } from '@/lib/db';
+
+export async function GET(request: NextRequest, { params }: { params: { id: string } }) {
+  try {
+    const roomId = parseInt(params.id, 10);
+    if (isNaN(roomId)) {
+      return NextResponse.json({ error: 'Invalid room ID' }, { status: 400 });
+    }
+
+    const [countResult, userLikeResult] = await Promise.all([
+      db.query('SELECT COUNT(*) AS count FROM room_likes WHERE room_id = $1', [roomId]),
+      db.query('SELECT 1 FROM room_likes WHERE room_id = $1 AND user_id = $2', [roomId, 1]),
+    ]);
+
+    return NextResponse.json({
+      count: parseInt(countResult.rows[0].count, 10),
+      user_liked: userLikeResult.rows.length > 0,
+    });
+  } catch (err: any) {
+    // Table may not exist yet — return safe defaults
+    return NextResponse.json({ count: 0, user_liked: false });
+  }
+}
+
+export async function POST(request: NextRequest, { params }: { params: { id: string } }) {
+  try {
+    const roomId = parseInt(params.id, 10);
+    if (isNaN(roomId)) {
+      return NextResponse.json({ error: 'Invalid room ID' }, { status: 400 });
+    }
+
+    // TODO: get user_id from session/auth instead of hardcoded
+    const userId = 1;
+
+    // Toggle: if already liked, unlike; otherwise like
+    const existing = await db.query(
+      'SELECT id FROM room_likes WHERE room_id = $1 AND user_id = $2',
+      [roomId, userId]
+    );
+
+    if (existing.rows.length > 0) {
+      await db.query('DELETE FROM room_likes WHERE id = $1', [existing.rows[0].id]);
+    } else {
+      await db.query('INSERT INTO room_likes (room_id, user_id) VALUES ($1, $2)', [roomId, userId]);
+    }
+
+    const countResult = await db.query('SELECT COUNT(*) AS count FROM room_likes WHERE room_id = $1', [roomId]);
+
+    return NextResponse.json({ count: parseInt(countResult.rows[0].count, 10) });
+  } catch (err: any) {
+    return NextResponse.json({ error: err.message || 'Failed to toggle like' }, { status: 500 });
+  }
+}