crowd-funder-for-time-pwa/electron/src/preload.ts

/**
 * Preload script for Electron
 * Sets up secure IPC communication between renderer and main process
 * 
 * @author Matthew Raymer
 */

import { contextBridge, ipcRenderer } from 'electron';

// Simple logger for preload script
const logger = {
  log: (...args: unknown[]) => console.log('[Preload]', ...args),
  error: (...args: unknown[]) => console.error('[Preload]', ...args),
  info: (...args: unknown[]) => console.info('[Preload]', ...args),
  warn: (...args: unknown[]) => console.warn('[Preload]', ...args),
  debug: (...args: unknown[]) => console.debug('[Preload]', ...args),
};

// Types for SQLite connection options
interface SQLiteConnectionOptions {
  database: string;
  version?: number;
  readOnly?: boolean;
  readonly?: boolean; // Handle both cases
  encryption?: string;
  mode?: string;
  useNative?: boolean;
  [key: string]: unknown; // Allow other properties
}

// Create a proxy for the CapacitorSQLite plugin
const createSQLiteProxy = () => {
  const MAX_RETRIES = 3;
  const RETRY_DELAY = 1000; // 1 second

  const withRetry = async <T>(operation: (...args: unknown[]) => Promise<T>, ...args: unknown[]): Promise<T> => {
    let lastError: Error | null = null;
    for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
      try {
        return await operation(...args);
      } catch (error) {
        lastError = error instanceof Error ? error : new Error(String(error));
        if (attempt < MAX_RETRIES) {
          logger.warn(`[CapacitorSQLite] SQLite operation failed (attempt ${attempt}/${MAX_RETRIES}), retrying...`, error);
          await new Promise(resolve => setTimeout(resolve, RETRY_DELAY));
        }
      }
    }
    throw new Error(`[CapacitorSQLite] SQLite operation failed after ${MAX_RETRIES} attempts: ${lastError?.message || 'Unknown error'}`);
  };

  const wrapOperation = (method: string) => {
    return async (...args: unknown[]): Promise<unknown> => {
      try {
        // For createConnection, ensure readOnly is false
        if (method === 'create-connection') {
          const options = args[0] as SQLiteConnectionOptions;
          if (options && typeof options === 'object') {
            // Set readOnly to false and ensure mode is rwc
            options.readOnly = false;
            options.mode = 'rwc';
            // Remove any lowercase readonly property if it exists
            delete options.readonly;
          }
        }
        return await withRetry(ipcRenderer.invoke, 'sqlite-' + method, ...args);
      } catch (error) {
        logger.error(`[CapacitorSQLite] SQLite ${method} failed:`, error);
        throw new Error(`[CapacitorSQLite] Database operation failed: ${error instanceof Error ? error.message : 'Unknown error'}`);
      }
    };
  };

  // Create a proxy that matches the CapacitorSQLite interface
  return {
    echo: wrapOperation('echo'),
    createConnection: wrapOperation('create-connection'),
    closeConnection: wrapOperation('close-connection'),
    execute: wrapOperation('execute'),
    query: wrapOperation('query'),
    run: wrapOperation('run'),
    isAvailable: wrapOperation('is-available'),
    getPlatform: () => Promise.resolve('electron'),
    // Add other methods as needed
  };
};

// Expose the Electron IPC API
contextBridge.exposeInMainWorld('electron', {
  ipcRenderer: {
    on: (channel: string, func: (...args: unknown[]) => void) => ipcRenderer.on(channel, (event, ...args) => func(...args)),
    once: (channel: string, func: (...args: unknown[]) => void) => ipcRenderer.once(channel, (event, ...args) => func(...args)),
    send: (channel: string, data: unknown) => ipcRenderer.send(channel, data),
    invoke: (channel: string, ...args: unknown[]) => ipcRenderer.invoke(channel, ...args),
  },
  // Add other APIs as needed
});

// Expose CapacitorSQLite proxy as before
contextBridge.exposeInMainWorld('CapacitorSQLite', createSQLiteProxy());

// Log startup
logger.log('[CapacitorSQLite] Preload script starting...');

// Handle window load
window.addEventListener('load', () => {
  logger.log('[CapacitorSQLite] Preload script complete');
});