checkmate/dist/index.js

lightweight data validation helper

"use strict";

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

module.exports = function (validations) {

  var checkers = Object.keys(validations).map(function (valueKey) {
    return { valueKey: valueKey, valueChecks: validations[valueKey] };
  }).reduce(function (validators, _ref) {
    var valueKey = _ref.valueKey,
        valueChecks = _ref.valueChecks;


    return validators.concat(Object.keys(valueChecks).map(function (checkKey) {
      return { checkKey: checkKey, checkFunction: valueChecks[checkKey] };
    }).reduce(function (validators, _ref2) {
      var checkKey = _ref2.checkKey,
          checkFunction = _ref2.checkFunction;

      return validators.concat(function (errors, values) {
        var result = checkFunction(values[valueKey]);
        if (result) return errors;
        return Object.assign({}, errors, _defineProperty({}, valueKey, [].concat((errors || {})[valueKey] || [], checkKey)));
      });
    }, []));
  }, []);

  return function (values) {
    return checkers.reduce(function (errors, checker) {
      return checker(errors, values);
    }, null);
  };
};