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(function () {

    'use strict';

    angular.module('simpleChatApp')
        .directive('focusWhen', focusWhen);

    function focusWhen() {
        return {
            link: link
        };

        function link(scope, element, attrs) {
            scope.$on(attrs.focusWhen, function (event) {
                element[0].focus();
                event.preventDefault();
            })
        }
    }
})();

form.input-group(ng-submit="addMessage(newMessage); $broadcast('form:change');")
    input#btn-input.form-control.input-sm(type='text', placeholder='Type your message here...', ng-model='newMessage', focus-when='form:change')
        span.input-group-btn
            button#btn-chat.btn.btn-warning.btn-sm(type='submit')
                | Send