SOURCE

// 维护权限列表
const jobList = ['FE', 'BE'];

// 策略
var strategies = {
  checkRole: function(value) {
    return value === 'juejin';
  },
  checkGrade: function(value) {
    return value >= 1;
  },
  checkJob: function(value) {
    return jobList.indexOf(value) > 1;
  },
  checkEatType: function(value) {
    return value === 'eat melons';
  }
};
// 校验规则
var Validator = function() {
  this.cache = [];

  // 添加策略事件
  this.add = function(value, method) {
    console.log(value,'-----1')
    console.log(strategies[method](value),'-----2')
    this.cache.push(function() {
      return strategies[method](value);
    });
  };

  // 检查
  this.check = function() {
      console.log(this.cache)
    for (let i = 0; i < this.cache.length; i++) {
      let valiFn = this.cache[i];
      console.log(valiFn)
      var data = valiFn(); // 开始检查
      if (!data) {
        return false;
      }
    }
    return true;
  };
};
// 小彭使用策略模式进行操作
var compose1 = function() {
  var validator = new Validator();
  console.log(validator,'validator')
  const data1 = {
    role: 'juejin',
    grade: 3
  };
  validator.add(data1.role, 'checkRole');
  validator.add(data1.grade, 'checkGrade');
  const result = validator.check();
  console.log(result,'result')
  return result;
};
compose1()