fix(adoption-insights): add timestamp to CSV export filename to avoid conflicts (#1366)

- Updated timestamp format to include milliseconds for better uniqueness
- Changed format from YYYY-MM-DD_HH-mm-ss to YYYY-MM-DD_HH-mm-ss-SSS
- Updated tests to validate new timestamp format with milliseconds
- Updated changeset to reflect the milliseconds addition

Author: lokanandaprabhu

workspaces/adoption-insights/.changeset/fix-csv-export-filename-timestamp.md

@@ -0,0 +1,5 @@
+---
+'@red-hat-developer-hub/backstage-plugin-adoption-insights': patch
+---
+
+Fixed CSV export filename to include timestamp for better file identification and to avoid naming conflicts. Active Users CSV exports now use format "active_users_YYYY-MM-DD_HH-mm-ss-SSS.csv" instead of generic "active_users"

workspaces/adoption-insights/plugins/adoption-insights/src/components/ActiveUsers/ExportCSVButton.tsx

@@ -34,6 +34,8 @@ const ExportCSVButton = () => {
 
   const handleCSVDownload = async () => {
     try {
+      const timestamp = format(new Date(), 'yyyy-MM-dd_HH-mm-ss-SSS');
+      const filename = `active_users_${timestamp}.csv`;
       await api.downloadBlob({
         type: 'active_users',
         start_date: startDateRange
@@ -42,6 +44,7 @@ const ExportCSVButton = () => {
         end_date: endDateRange ? format(endDateRange, 'yyyy-MM-dd') : undefined,
         timezone: new Intl.DateTimeFormat().resolvedOptions().timeZone,
         format: 'csv',
+        blobName: filename,
       });
     } catch (error) {
       // eslint-disable-next-line no-console

workspaces/adoption-insights/plugins/adoption-insights/src/components/ActiveUsers/__tests__/ExportCSVButton.test.tsx

@@ -58,6 +58,9 @@ describe('ExportCSVButton', () => {
         end_date: '2025-01-31',
         format: 'csv',
         timezone: 'UTC',
+        blobName: expect.stringMatching(
+          /^active_users_\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}-\d{3}\.csv$/,
+        ),
       });
     });
   });
@@ -84,4 +87,30 @@ describe('ExportCSVButton', () => {
       expect(screen.getByText('Export CSV')).toBeInTheDocument(),
     );
   });
+
+  it('should generate unique timestamped filenames for multiple downloads', async () => {
+    render(<ExportCSVButton />);
+
+    const button = screen.getByRole('button');
+
+    fireEvent.click(button);
+    await waitFor(() => expect(mockDownloadBlob).toHaveBeenCalledTimes(1));
+
+    const firstCall = mockDownloadBlob.mock.calls[0][0];
+    expect(firstCall.blobName).toMatch(
+      /^active_users_\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}-\d{3}\.csv$/,
+    );
+
+    await new Promise(resolve => setTimeout(resolve, 1100));
+
+    fireEvent.click(button);
+    await waitFor(() => expect(mockDownloadBlob).toHaveBeenCalledTimes(2));
+
+    const secondCall = mockDownloadBlob.mock.calls[1][0];
+    expect(secondCall.blobName).toMatch(
+      /^active_users_\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}-\d{3}\.csv$/,
+    );
+
+    expect(firstCall.blobName).not.toBe(secondCall.blobName);
+  });
 });