import { Request, Response, NextFunction } from 'express';

export function maskAccountNumber(num: string): string {
  if (num.length <= 10) return num;
  return num.slice(0, 6) + '******' + num.slice(-4);
}

export function escapeLike(input: string): string {
  return input.replace(/\\/g, '\\\\').replace(/%/g, '\\%').replace(/_/g, '\\_');
}

type AsyncHandler = (req: Request, res: Response, next: NextFunction) => Promise<void>;

export function asyncHandler(fn: AsyncHandler) {
  return (req: Request, res: Response, next: NextFunction) => {
    fn(req, res, next).catch(next);
  };
}