preload.js

const { contextBridge, ipcRenderer } = require('electron');

contextBridge.exposeInMainWorld('electronAPI', {
  selectFolder: () => ipcRenderer.invoke('select-folder'),
  selectFile: () => ipcRenderer.invoke('select-file'),
  getTasks: () => ipcRenderer.invoke('get-tasks'),
  getGuiOutputHints: () => ipcRenderer.invoke('get-gui-output-hints'),
  openTaskFolder: (path) => ipcRenderer.invoke('open-task-folder', path),
  openGuiDownloadFolder: (userInput) => ipcRenderer.invoke('open-gui-output-folder', userInput),
  exportTasks: (ids) => ipcRenderer.invoke('export-tasks', ids),
  deleteTasks: (ids) => ipcRenderer.invoke('delete-tasks', ids),
  startOfflinePreview: (folderPath) => ipcRenderer.invoke('start-offline-preview', folderPath),
  cancelAllDownloads: () => ipcRenderer.invoke('cancel-all-downloads'),
  startTask: (config) => ipcRenderer.send('start-task', config),
  setAppLocale: (lng) => ipcRenderer.send('set-app-locale', lng),
  onTaskUpdate: (callback) => {
    const handler = (event, data) => callback(data);
    ipcRenderer.on('task-update', handler);
    return () => ipcRenderer.removeListener('task-update', handler);
  },
  onProgress: (callback) => {
    const handler = (event, data) => callback(data);
    ipcRenderer.on('task-progress', handler);
    return () => {
      ipcRenderer.removeListener('task-progress', handler);
    };
  },
  onTaskDone: (callback) => {
    const handler = (event, data) => callback(data);
    ipcRenderer.on('task-done', handler);
    return () => {
      ipcRenderer.removeListener('task-done', handler);
    };
  }
});