fix: use tauri plugin dialog + fs to save a file

src/app/components/DeviceVerificationSetup.tsx

@@ -13,9 +13,9 @@ import {
   color,
   Spinner,
 } from 'folds';
-import FileSaver from 'file-saver';
 import to from 'await-to-js';
 import { AuthDict, IAuthData, MatrixError, UIAuthCallback } from 'matrix-js-sdk';
+import { saveFile } from '../utils/file-saver';
 import { PasswordInput } from './password-input';
 import { ContainerColor } from '../styles/ContainerColor.css';
 import { copyToClipboard } from '../utils/dom';
@@ -238,7 +238,7 @@ function RecoveryKeyDisplay({ recoveryKey }: RecoveryKeyDisplayProps) {
     const blob = new Blob([recoveryKey], {
       type: 'text/plain;charset=us-ascii',
     });
-    FileSaver.saveAs(blob, 'recovery-key.txt');
+    saveFile(blob, 'recovery-key.txt');
   };
 
   const safeToDisplayKey = show ? recoveryKey : recoveryKey.replace(/[^\s]/g, '*');

src/app/components/Pdf-viewer/PdfViewer.tsx

@@ -21,7 +21,7 @@ import {
   config,
 } from 'folds';
 import FocusTrap from 'focus-trap-react';
-import FileSaver from 'file-saver';
+import { saveFile } from '../../utils/file-saver';
 import * as css from './PdfViewer.css';
 import { AsyncStatus } from '../../hooks/useAsyncCallback';
 import { useZoom } from '../../hooks/useZoom';
@@ -77,8 +77,9 @@ export const PdfViewer = as<'div', PdfViewerProps>(
       }
     }, [docState, pageNo, zoom]);
 
-    const handleDownload = () => {
-      FileSaver.saveAs(src, name);
+    const handleDownload = async () => {
+      const blob = await fetch(src).then((r) => r.blob());
+      await saveFile(blob, name);
     };
 
     const handleJumpSubmit: FormEventHandler<HTMLFormElement> = (evt) => {

src/app/components/image-viewer/ImageViewer.tsx

@@ -1,8 +1,8 @@
 /* eslint-disable jsx-a11y/no-noninteractive-element-interactions */
 import React from 'react';
-import FileSaver from 'file-saver';
 import classNames from 'classnames';
 import { Box, Chip, Header, Icon, IconButton, Icons, Text, as } from 'folds';
+import { saveFile } from '../../utils/file-saver';
 import * as css from './ImageViewer.css';
 import { useZoom } from '../../hooks/useZoom';
 import { usePan } from '../../hooks/usePan';
@@ -21,7 +21,7 @@ export const ImageViewer = as<'div', ImageViewerProps>(
 
     const handleDownload = async () => {
       const fileContent = await downloadMedia(src);
-      FileSaver.saveAs(fileContent, alt);
+      await saveFile(fileContent, alt);
     };
 
     return (

src/app/components/message/FileHeader.tsx

@@ -1,7 +1,7 @@
 import { Badge, Box, Icon, IconButton, Icons, Spinner, Text, as, toRem } from 'folds';
 import React, { ReactNode, useCallback } from 'react';
 import { EncryptedAttachmentInfo } from 'browser-encrypt-attachment';
-import FileSaver from 'file-saver';
+import { saveFile } from '../../utils/file-saver';
 import { mimeTypeToExt } from '../../utils/mimeTypes';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
@@ -33,9 +33,7 @@ export function FileDownloadButton({ filename, url, mimeType, encInfo }: FileDow
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);
 
-      const fileURL = URL.createObjectURL(fileContent);
-      FileSaver.saveAs(fileURL, filename);
-      return fileURL;
+      await saveFile(fileContent, filename);
     }, [mx, url, useAuthentication, mimeType, encInfo, filename])
   );
 

src/app/components/message/content/FileContent.tsx

@@ -14,9 +14,9 @@ import {
   TooltipProvider,
   as,
 } from 'folds';
-import FileSaver from 'file-saver';
 import { EncryptedAttachmentInfo } from 'browser-encrypt-attachment';
 import FocusTrap from 'focus-trap-react';
+import { saveFile } from '../../../utils/file-saver';
 import { IFileInfo } from '../../../../types/matrix/common';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
@@ -261,9 +261,7 @@ export function DownloadFile({ body, mimeType, url, info, encInfo }: DownloadFil
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);
 
-      const fileURL = URL.createObjectURL(fileContent);
-      FileSaver.saveAs(fileURL, body);
-      return fileURL;
+      await saveFile(fileContent, body);
     }, [mx, url, useAuthentication, mimeType, encInfo, body])
   );
 
@@ -275,11 +273,7 @@ export function DownloadFile({ body, mimeType, url, info, encInfo }: DownloadFil
       fill="Soft"
       radii="300"
       size="400"
-      onClick={() =>
-        downloadState.status === AsyncStatus.Success
-          ? FileSaver.saveAs(downloadState.data, body)
-          : download()
-      }
+      onClick={() => download()}
       disabled={downloadState.status === AsyncStatus.Loading}
       before={
         downloadState.status === AsyncStatus.Loading ? (

src/app/features/settings/devices/LocalBackup.tsx

@@ -1,6 +1,6 @@
 import React, { FormEventHandler, useCallback, useEffect, useState } from 'react';
 import { Box, Button, color, Icon, Icons, Spinner, Text, toRem } from 'folds';
-import FileSaver from 'file-saver';
+import { saveFile } from '../../../utils/file-saver';
 import { SequenceCard } from '../../../components/sequence-card';
 import { SettingTile } from '../../../components/setting-tile';
 import { SequenceCardStyle } from '../styles.css';
@@ -28,7 +28,7 @@ function ExportKeys() {
         const blob = new Blob([encKeys], {
           type: 'text/plain;charset=us-ascii',
         });
-        FileSaver.saveAs(blob, 'cinny-keys.txt');
+        await saveFile(blob, 'cinny-keys.txt');
       },
       [mx]
     )

src/app/utils/file-saver.ts

@@ -0,0 +1,28 @@
+import FileSaver from 'file-saver';
+
+const isTauri = typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window;
+
+export async function saveFile(blob: Blob, fileName: string): Promise<void> {
+  if (!isTauri) {
+    FileSaver.saveAs(blob, fileName);
+    return;
+  }
+
+  const { save } = await import('@tauri-apps/plugin-dialog');
+  const { writeFile } = await import('@tauri-apps/plugin-fs');
+
+  const filePath = await save({
+    defaultPath: fileName,
+    filters: [{ name: 'File', extensions: [getExt(fileName)] }],
+  });
+
+  if (filePath === null) return;
+
+  const buffer = await blob.arrayBuffer();
+  await writeFile(filePath, new Uint8Array(buffer));
+}
+
+function getExt(fileName: string): string {
+  const idx = fileName.lastIndexOf('.');
+  return idx >= 0 ? fileName.slice(idx + 1) : '*';
+}