port validation

goog.provide('sgo.manager.directives.port');

sgo.manager.directives.port = function() {
    function link(scope, element, attrs, ctrl) {

        var minPortValue = 0,
            maxPortValue = 65535;

        function validate(value) {
            var isValid = true;

            if(value !== undefined) {
                if(isNaN(value) === true) {
                    isValid = false;
                } else {
                    var parsedValue = parseInt(value);

                    if(parsedValue < minPortValue || parsedValue > maxPortValue) {
                        isValid = false;
                    }
                }
            }

            ctrl.$setValidity('port', isValid);
            return value;
        }

        ctrl.$formatters.unshift(validate);
        ctrl.$parsers.unshift(validate);
    }

    return {
        restrict: 'A',
        link: link,
        require: 'ngModel'
    };
};