writing-helper/electron/preload.ts

import { contextBridge, ipcRenderer } from 'electron';

// ─── Types ───────────────────────────────────────────────────────────────────

interface AppConfig {
  recentProjects: RecentProject[];
  lastActiveProjectPath?: string;
}

interface RecentProject {
  name: string;
  path: string;
  lastOpenedAt: string;
  novelType: string;
}

interface ElectronAPI {
  /**
   * Opens the native OS folder selection dialog.
   * Returns the selected folder path, or null if the user cancelled.
   */
  selectFolder: () => Promise<string | null>;

  /**
   * Reads the global app config from the Electron userData directory.
   */
  getAppConfig: () => Promise<AppConfig>;

  /**
   * Writes the global app config to the Electron userData directory.
   */
  saveAppConfig: (config: AppConfig) => Promise<{ success: boolean }>;
}

// ─── Expose API via contextBridge ─────────────────────────────────────────────

const electronAPI: ElectronAPI = {
  selectFolder: () => ipcRenderer.invoke('select-folder'),
  getAppConfig: () => ipcRenderer.invoke('get-app-config'),
  saveAppConfig: (config: AppConfig) => ipcRenderer.invoke('save-app-config', config),
};

contextBridge.exposeInMainWorld('electronAPI', electronAPI);