promise的机制的使用

//定义模块
var myAppModule = angular.module('myApp',[]);
myAppModule.controller('historyController',function($scope,$http){
    var url = '/MaWeb/data/data.txt';
    $http.get(url).success(function(data,status,headers,config){
        var dataArr = data.split('\n');
        $scope.histroyList = [];
        for(var i = 0;i<dataArr.length;i++){
            var ball = dataArr[i].split(',');
            var item = {};
            item['firstBall']=ball[0];
            item['sencondBall']=ball[1];
            item['thirdBall']=ball[2];
            item['fifthBall']=ball[3];
            item['fifthBall']=ball[4];
            item['sixBall']=ball[5];
            item['blueBall']=ball[6];
            $scope.histroyList[i]=item;
        }
    });

   $scope.redList = [];
   for(var i = 0;i<33;i++){
       $scope.redList[i] = i+1;
   };
   $scope.blueList = [];
   for(var i = 0;i<16;i++){
       $scope.blueList[i] = i+1;
   };
   $scope.isSelected =function(num,item,type){
     for(v in item){
         if(type==='redBall'){
             if(num == item[v]&&v!='blueBall'){
                 return true;
             }
         }else if(type==='blueBall'){
             if(num == item[v]&&v=='blueBall'){
                 return true;
             }
         }

     }
   };

});
myAppModule.controller('chooseController',function($scope,$interval){
      $scope.balls = {};
      $scope.next = 1;
      $scope.whichBall = '';
      $scope.isStart = false;
      $scope.start =function(){
          $scope.balls = {};
          $scope.isStart = true ;
          $scope.next =1;
          $scope.whichBall = 'redBall'+ $scope.next;
          $scope.next++;
     };
     function in_obj(value,obj){
         for(v in obj){
             if(obj[v]==value){
                 return true;
             }
         }
         return false;
     }
     var calcBall = function(ball,maxValue,time){
          $scope.balls[ball] = 0;
          $scope.isReady = 0;
         var updateball = function(){
             var num = Math.floor(Math.random(0,1)*maxValue)+1;
             if($scope.next<8&&!in_obj(num,$scope.balls)){
                  $scope.balls[ball] = num;
             }else if($scope.next==8){
                  $scope.balls[ball] = num;
             }
             if($scope.isReady>=time){
                  $interval.cancel($scope.intval);
             }
         }
         //使用promise模式
          $scope.intval = $interval(function(){
              updateball();
          },100);
          $scope.intval.then(
             function(){
                  console.log('HI CHANGXIN');
     },
     function(){
                   console.log('error!');
                   $scope.whichBall = 'redBall'+$scope.next;
                  if($scope.next==8){
                       $scope.isStart = false;
                  }
                    $scope.next++;
     },
     function(){
                   console.log('HI LVTU');
                   $scope.isReady =$scope.isReady+100;
     }
           );
          updateball();
     }

     function watchFn(newValue,oldValue,scope){
         if(newValue!=''){
             if(newValue.substring(7)<7){
                 calcBall(newValue,33,2000);
             }else if (newValue.substring(7)==7){
                 calcBall(newValue,16,2000);
             }

         }
     }
     //deepWatch
      $scope.$watch('whichBall',watchFn);
});