fix: downloading backups in mobile webview (#1703)

packages/web/src/javascripts/NativeMobileWeb/DownloadSelectedNotesOnAndroid.tsx

@@ -0,0 +1,32 @@
+import { WebApplication } from '@/Application/Application'
+import { getNoteBlob, getNoteFileName } from '@/Utils/NoteExportUtils'
+import { parseFileName } from '@standardnotes/filepicker'
+import { Platform, SNNote } from '@standardnotes/snjs'
+import { sanitizeFileName } from '@standardnotes/ui-services'
+import { downloadBlobOnAndroid } from './DownloadBlobOnAndroid'
+
+export const downloadSelectedNotesOnAndroid = async (application: WebApplication, notes: SNNote[]) => {
+  if (!application.isNativeMobileWeb() || application.platform !== Platform.Android) {
+    throw new Error('Function being used on non-android platform')
+  }
+  if (notes.length === 1) {
+    const note = notes[0]
+    const blob = getNoteBlob(application, note)
+    const { name, ext } = parseFileName(getNoteFileName(application, note))
+    const filename = `${sanitizeFileName(name)}.${ext}`
+    await downloadBlobOnAndroid(application, blob, filename)
+    return
+  }
+  if (notes.length > 1) {
+    const zippedDataBlob = await application.getArchiveService().zipData(
+      notes.map((note) => {
+        return {
+          name: getNoteFileName(application, note),
+          content: getNoteBlob(application, note),
+        }
+      }),
+    )
+    const filename = `Standard Notes Export - ${application.getArchiveService().formattedDateForExports()}.zip`
+    await downloadBlobOnAndroid(application, zippedDataBlob, filename)
+  }
+}