feat(getDownloadFileName): handle server bundles

The 2anki server can send a zip file with multiple APKG files or one
APKG file.

src/pages/DownloadsPage/helpers/getDownloadFileName.ts

@@ -1,5 +1,7 @@
+import { isServerBundle } from './isServerBundle';
+
 export const getDownloadFileName = (fileName: string) => {
-  if (fileName.toLowerCase().endsWith('.apkg')) {
+  if (fileName.toLowerCase().endsWith('.apkg') || isServerBundle(fileName)) {
     return fileName;
   }
   return `${fileName}.apkg`;

src/pages/DownloadsPage/helpers/isServerBundle.test.ts

@@ -0,0 +1,9 @@
+import { isServerBundle } from './isServerBundle';
+
+describe('isBundle', () => {
+  test('server bundle name', () => {
+    expect(
+      isServerBundle('Your decks-62a104dc-2c91-4ce8-837e-d2379e523693.zip')
+    ).toBe(true);
+  });
+});

src/pages/DownloadsPage/helpers/isServerBundle.ts

@@ -0,0 +1,8 @@
+/**
+ * isServerBundle returns true if the filename is a server bundle.
+ * The 2anki server can send a zip file with multiple APKG files or one APKG file.
+ * @param filename The filename to check.
+ * @returns boolean
+ */
+export const isServerBundle = (filename: string) =>
+  filename.startsWith('Your decks') || filename.endsWith('.zip');