MainController.js

// Code goes here

(function() {
  
  var app = angular.module("githubViewer");

  var MainController = function($scope,$interval,$location) {

    var decrementCountDown = function(){
       $scope.countdown -= 1;
       if($scope.countdown < 1){
         $scope.search($scope.username);
       }
    };
    
    
    
    var countdownInterval = null;
    
    var startCountdown = function(){
       countdownInterval = $interval(decrementCountDown,1000,$scope.countdown);
    };
    
    $scope.search = function(username){
      
        
      if(countdownInterval){
        $interval.cancel(countdownInterval);
        $scope.countdown = null;
      }
      
      $location.path("/user/" + username);
    };
    

      
    $scope.username = "angular";    
    $scope.countdown = 5;
    startCountdown();
  }
  
  app.controller("MainController",MainController);
  
}());