MainController.js

// Code goes here

(function() {
  //App Dependency Injection
  var apiApp = angular.module('apiApp');

  //Controller
  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();

  };

  //Controller Declaration 
  apiApp.controller("MainController", ["$scope", "$interval", "$location", MainController]);

})();