// 支持es4语法
var filter = {
  numberToFixed: function(value) {
    return value.toFixed(2);
  },
  phoneFormat: function(value) {
    if( !value ) return "";
    if( value.length < 11){
      return '';
    }
    return value.substring(0, 4) +"****"+ value.substring(7,11)
  },
  cardIdFormat: function(value) {
    if( !value ) return "";
    if( value.length < 18){
      return '';
    }
    return value.substring(0, 4) +"****"+ value.substring(14,18)
  },
  trueFalseFormatter: function(question) {
    for (var i = 0; i < question.items.length; i++) {
      if (question.items[i].prefix === question.correct) {
        return question.items[i].content;
      }
    }
    return '';
  },
  indexOf: function(arg1, arg2) {
    return arg1.toString().indexOf(arg2.toString()) > -1 ? true : false;
  },
  numberToArray: function(number) {
    var array = [];
    for (var i = 0; i < number; i++) {
      array.push(i);
    }
    return array;
  },
  getMultResult:function( select ){
    var prevList = ["", "A","B","C", "D", "E","F"]
    var res = []
    select=''+select
    for( var i=0; i< select.length;i++){
      var index= +select[i]
      res.push( prevList[index])
    }
    return res.join(",")
  },
  isSelect: function( index, select ){
    if( index == select)  return true;
    select = ""+select
    return select.indexOf( index )>-1;
  },
  isExamSelect: function( index, info ){
    if( !info.answers ) return '';
    if( index >= info.answers.length ) return '';
    var select = ""
    if( index == info.index ) select += 'cur-select';
    if( info.answers[index].select>0 ) select += ' is-select';
    return select||'un-select'
  }
}
// 导出对外暴露的属性
module.exports = {
  numberToFixed: filter.numberToFixed,
  trueFalseFormatter: filter.trueFalseFormatter,
  indexOf: filter.indexOf,
  isSelect: filter.isSelect,
  phoneFormat: filter.phoneFormat,
  getMultResult:filter.getMultResult,
  cardIdFormat:filter.cardIdFormat,
  isExamSelect: filter.isExamSelect,
  numberToArray: filter.numberToArray,
}