const dataSource = "data.json"; // JSON input file

angular
    .module("main", [])
    .controller("ctrl", ($scope, $http, $rootScope, $location) => {
        $scope.showTable = false;
        $scope.sPresentation = undefined;

        $scope.strCheck = str => {
            return str == "" || str == undefined || str == null
                ? "N/A"
                : str;
        };

        $http.get(dataSource).then(response => {
            $scope.data = response.data;
            $rootScope.title = $scope.strCheck($scope.data.title);
            $scope.$watch(
                () => location.hash,
                value => {
                    if (value == "" || value == undefined || value == null || value == "#!/") {
                        $scope.showTable = false;
                        $scope.sPresentation = undefined;
                        $rootScope.title = $scope.strCheck(
                            $scope.data.title
                        );
                    } else {
                        $scope.displayTable($location.hash());
                    }
                }
            );
        });

        $scope.displayTable = path => {
            $http.get(path).then(response => {
                $location.hash(path);
                $scope.sPresentation = response.data;
                $scope.showTable = true;
                $rootScope.title = $scope.strCheck(
                    $scope.sPresentation.title
                );
            });
        };
    });