added backend-mgmt for dataset/dataset_entry and utterances, this includes upload and also displaying of the dataset on the admin pages

src/app/actions/remove-dataset-entries.ts

@@ -0,0 +1,34 @@
+'use server';
+
+import db from '@/lib/db';
+import { dataset_entry } from '@/lib/model/dataset_entry';
+import { eq } from 'drizzle-orm';
+import { revalidatePath } from 'next/cache';
+import { rm } from 'fs/promises';
+import { join } from 'path';
+import { existsSync } from 'fs';
+
+export async function removeAllDatasetEntries(datasetId: number) {
+  try {
+    // Delete all entries from database
+    await db.delete(dataset_entry).where(eq(dataset_entry.datasetId, datasetId));
+
+    // Delete dataset files from public folder
+    const datasetDir = join(process.cwd(), 'public', 'datasets', datasetId.toString());
+    if (existsSync(datasetDir)) {
+      await rm(datasetDir, { recursive: true, force: true });
+    }
+
+    revalidatePath(`/admin/datasets/${datasetId}`);
+
+    return {
+      success: true,
+      message: 'All dataset entries have been removed',
+    };
+  } catch (error) {
+    console.error('Error removing dataset entries:', error);
+    throw new Error(
+      error instanceof Error ? error.message : 'Failed to remove dataset entries'
+    );
+  }
+}