feat: add "Download all" button to bundle attachments into a zip #466

lib/__tests__/download-filename.test.ts

@@ -6,6 +6,7 @@ import type { Email } from '@/lib/jmap/types';
 import {
   emailExportFilename,
   attachmentDownloadFilename,
+  attachmentsBundleFilename,
   bundleExportFilename,
   emailVars,
   attachmentVars,
@@ -93,6 +94,24 @@ describe('bundleExportFilename', () => {
   });
 });
 
+describe('attachmentsBundleFilename', () => {
+  it('embeds the sanitised subject', () => {
+    expect(attachmentsBundleFilename(makeEmail({ subject: 'Invoice March' }))).toBe('attachments_Invoice March.zip');
+  });
+
+  it('sanitises filesystem-reserved characters', () => {
+    expect(attachmentsBundleFilename(makeEmail({ subject: 'Q1/Q2: report' }))).toBe('attachments_Q1_Q2_ report.zip');
+  });
+
+  it('falls back when the subject is empty', () => {
+    expect(attachmentsBundleFilename(makeEmail({ subject: '' }))).toBe('attachments.zip');
+  });
+
+  it('falls back when there is no email', () => {
+    expect(attachmentsBundleFilename(null)).toBe('attachments.zip');
+  });
+});
+
 describe('emailVars (date + address labels)', () => {
   it('returns the invalid-date sentinel for an unparseable date', () => {
     const v = emailVars(makeEmail({ receivedAt: 'not-a-date', sentAt: undefined }));