Fix private calls

electron/ipc/system.ts

@@ -12,7 +12,7 @@ import {
 import * as fs from 'fs';
 import * as fsp from 'fs/promises';
 import * as path from 'path';
-import { fileURLToPath } from 'url';
+import { fileURLToPath, pathToFileURL } from 'url';
 import {
   getDesktopSettingsSnapshot,
   updateDesktopSettings,
@@ -519,12 +519,46 @@ export function setupSystemHandlers(): void {
     }
   });
 
+  ipcMain.handle('get-file-url', async (_event, filePath: string) => {
+    if (typeof filePath !== 'string' || !filePath.trim()) {
+      return null;
+    }
+
+    try {
+      await fsp.access(filePath, fs.constants.F_OK);
+      return pathToFileURL(filePath).toString();
+    } catch {
+      return null;
+    }
+  });
+
   ipcMain.handle('read-file', async (_event, filePath: string) => {
     const data = await fsp.readFile(filePath);
 
     return data.toString('base64');
   });
 
+  ipcMain.handle('read-file-chunk', async (_event, filePath: string, start: number, end: number) => {
+    const fileHandle = await fsp.open(filePath, 'r');
+
+    try {
+      const safeStart = Math.max(0, Math.trunc(start));
+      const safeEnd = Math.max(safeStart, Math.trunc(end));
+      const buffer = Buffer.alloc(safeEnd - safeStart);
+      const result = await fileHandle.read(buffer, 0, buffer.length, safeStart);
+
+      return buffer.subarray(0, result.bytesRead).toString('base64');
+    } finally {
+      await fileHandle.close();
+    }
+  });
+
+  ipcMain.handle('get-file-size', async (_event, filePath: string) => {
+    const stats = await fsp.stat(filePath);
+
+    return stats.size;
+  });
+
   ipcMain.handle('read-clipboard-files', async () => {
     return await readClipboardFiles();
   });
@@ -536,6 +570,13 @@ export function setupSystemHandlers(): void {
     return true;
   });
 
+  ipcMain.handle('append-file', async (_event, filePath: string, base64Data: string) => {
+    const buffer = Buffer.from(base64Data, 'base64');
+
+    await fsp.appendFile(filePath, buffer);
+    return true;
+  });
+
   ipcMain.handle('delete-file', async (_event, filePath: string) => {
     try {
       await fsp.unlink(filePath);
@@ -567,6 +608,60 @@ export function setupSystemHandlers(): void {
       cancelled: false };
   });
 
+  ipcMain.handle('save-existing-file-as', async (_event, sourceFilePath: string, defaultFileName: string) => {
+    if (typeof sourceFilePath !== 'string' || !sourceFilePath.trim()) {
+      return { saved: false,
+        cancelled: false };
+    }
+
+    const stats = await fsp.stat(sourceFilePath);
+
+    if (!stats.isFile()) {
+      return { saved: false,
+        cancelled: false };
+    }
+
+    const result = await dialog.showSaveDialog({
+      defaultPath: defaultFileName || path.basename(sourceFilePath)
+    });
+
+    if (result.canceled || !result.filePath) {
+      return { saved: false,
+        cancelled: true };
+    }
+
+    await fsp.copyFile(sourceFilePath, result.filePath);
+
+    return { saved: true,
+      cancelled: false };
+  });
+
+  ipcMain.handle('open-file-path', async (_event, filePath: string) => {
+    if (typeof filePath !== 'string' || !filePath.trim()) {
+      return { opened: false,
+        reason: 'missing-path' };
+    }
+
+    try {
+      const stats = await fsp.stat(filePath);
+
+      if (!stats.isFile()) {
+        return { opened: false,
+          reason: 'not-a-file' };
+      }
+
+      const error = await shell.openPath(filePath);
+
+      return error
+        ? { opened: false,
+          reason: error }
+        : { opened: true };
+    } catch (error) {
+      return { opened: false,
+        reason: error instanceof Error ? error.message : 'open-failed' };
+    }
+  });
+
   ipcMain.handle('ensure-dir', async (_event, dirPath: string) => {
     await fsp.mkdir(dirPath, { recursive: true });
     return true;