const { validationResult } = require('express-validator');

// 字段验证中间件
module.exports = validations => {
  return async (req, res, next) => {
    await Promise.all(validations.map(validation => validation.run(req)));
    const errors = validationResult(req);
    if (errors.isEmpty()) {
      return next();
    }
    res.status(400).json({
      code: -1,
      msg: errors
        .array()
        .reduce((pre, item) => `${pre}${item.location}.${item.param} is ${item.msg};`, ''),
    });
  };
};