Naimikan/angular-mapboxgl-directive

angular.module('mapboxgl-directive').directive('glZoom', [function () {
    function mapboxGlZoomDirectiveLink (scope, element, attrs, controller) {
        if (!controller) {
            throw new Error('Invalid angular-mapboxgl-directive controller');
        }

        var mapboxglScope = controller.getMapboxGlScope();

        controller.getMap().then(function (map) {
            mapboxglScope.$watch('glZoom', function (zoomObject) {
                if (angular.isDefined(zoomObject)) {
                    if (angular.isNumber(zoomObject.value) && (zoomObject.value >= 0 || zoomObject.value <= 20)) {
                        map.setZoom(zoomObject.value, zoomObject.eventData);
                    } else {
                        throw new Error('Invalid zoom');
                    }
                }
            }, true);
        });
    }

    var directive = {
        restrict: 'A',
        scope: false,
        replace: false,
        require: '?^mapboxgl',
        link: mapboxGlZoomDirectiveLink
    };

    return directive;
}]);