ngApp.js

(function () {
    var app = angular.module("ngApp", []);

    var MainController = function ($scope, $http) {

        var onUserComplete = function (response) {
            $scope.user = response.data;
            $http.get($scope.user.repos_url)
            .then(onRepos, onError);
        }

        var onRepos = function (response) {
            $scope.repos = response.data;
        }

        var onError = function (reason) {
            $scope.error = "Could not find a user"
        }

        $scope.search = function (username) {
             $http.get("https://api.github.com/users/" + username)
                .then(onUserComplete, onError) 
        }

        $scope.username = "angular";
        $scope.message = "Angular! GitHub Viewer";
        $scope.repoSortOrder = "-stargazers_count";
    };

    app.controller("MainController", MainController);
} ());