feat: added initial export of participant/annotation-data

src/components/ExportParticipantDataButton.tsx

@@ -0,0 +1,55 @@
+'use client';
+
+import { exportParticipantDataAsJson } from '@/app/actions/participants';
+import { useState } from 'react';
+
+interface ExportParticipantDataButtonProps {
+  experimentId: number;
+  userId: string;
+}
+
+export default function ExportParticipantDataButton({
+  experimentId,
+  userId,
+}: ExportParticipantDataButtonProps) {
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleExport = async () => {
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const { jsonData, filename } = await exportParticipantDataAsJson(experimentId, userId);
+
+      // Create blob and trigger download
+      const blob = new Blob([jsonData], { type: 'application/json' });
+      const url = URL.createObjectURL(blob);
+      const link = document.createElement('a');
+      link.href = url;
+      link.download = filename;
+      document.body.appendChild(link);
+      link.click();
+      document.body.removeChild(link);
+      URL.revokeObjectURL(url);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to export data');
+      console.error('Export error:', err);
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <div className="flex flex-col gap-2">
+      <button
+        onClick={handleExport}
+        disabled={isLoading}
+        className="px-3 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 disabled:bg-gray-400 disabled:cursor-not-allowed transition-colors text-sm font-medium"
+      >
+        {isLoading ? 'Exporting...' : 'Export as JSON'}
+      </button>
+      {error && <div className="text-red-600 text-sm">{error}</div>}
+    </div>
+  );
+}