验证表单-js策略模式

var strategys = {
  isNotEmpty: function (value, errorMsg) {
    if (value === ‘‘) {
      return errorMsg
    }
  },
  // 限制最小长度
  minLength: function (value, length, errorMsg) {
    if (value.length < length) {
      return errorMsg
    }
  },
  // 手机号码格式
  mobileFormat: function (value, errorMsg) {
    if (!/(^1[3|5|8][0-9]{9}$)/.test(value)) {
      return errorMsg
    }
  }
}

var Validator = function () {
  this.cache = [] // 保存效验规则
}
Validator.prototype.add = function (dom, rules) {
  var self = this
  let lent = rules.length
  for (var i = 0; i < lent; i++) {
    let rule = rules[i];
    (function (rule) {
      var strategyAry = rule.strategy.split(‘:‘)
      var errorMsg = rule.errorMsg
      self.cache.push(function () {
        var strategy = strategyAry.shift()
        strategyAry.unshift(dom)
        strategyAry.push(errorMsg)
        return strategys[strategy].apply(dom, strategyAry)
      })
    })(rule)
  }
}

Validator.prototype.start = function () {
  let lent = this.cache.length
  for (var i = 0; i < lent; i++) {
    let validatorFunc = this.cache[i]
    var msg = validatorFunc() // 开始效验 并取得效验后的返回信息
    if (msg) {
      return msg
    }
  }
}

export default Validator

// 检测表单
    test () {
      let test = new Validator()
      let value = this.post
      test.add(value.name, [
        {strategy: ‘isNotEmpty‘, errorMsg: ‘用户名不能为空‘},
        {strategy: ‘minLength:6‘, errorMsg: ‘用户名长度不能小于6位‘}
      ])
      test.add(value.password, [
        {strategy: ‘isNotEmpty‘, errorMsg: ‘用户名不能为空‘},
        {strategy: ‘minLength:6‘, errorMsg: ‘用户名长度不能小于6位‘}
      ])
      test.add(value.tel, [
        {strategy: ‘mobileFormat‘, errorMsg: ‘不是手机‘}
      ])
      var errorMsg = test.start() // 获得效验结果
      return errorMsg // 返回效验结果
    },
    // 提交数据
    jsSet () {
      let errorMsg = this.test()
      if (errorMsg) {
        return false
      }
    }