Saving captions is working

ui/src/app/api/img/caption/route.ts

@@ -0,0 +1,30 @@
+import { NextResponse } from 'next/server';
+import fs from 'fs';
+import { getDatasetsRoot } from '@/app/api/datasets/utils';
+
+export async function POST(request: Request) {
+  try {
+    const body = await request.json();
+    const { imgPath, caption } = body;
+    let datasetsPath = await getDatasetsRoot();
+    // make sure the dataset path is in the image path
+    if (!imgPath.startsWith(datasetsPath)) {
+      return NextResponse.json({ error: 'Invalid image path' }, { status: 400 });
+    }
+
+    // if img doesnt exist, ignore
+    if (!fs.existsSync(imgPath)) {
+      return NextResponse.json({ error: 'Image does not exist' }, { status: 404 });
+    }
+
+
+    // check for caption
+    const captionPath = imgPath.replace(/\.[^/.]+$/, '') + '.txt';
+    // save caption to file
+    fs.writeFileSync(captionPath, caption);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    return NextResponse.json({ error: 'Failed to create dataset' }, { status: 500 });
+  }
+}