@oat-sa/tao-item-runner-qti/dist/qtiItem/helper/EventMgr.js

TAO QTI Item Runner modules

define(['lodash'], function (_) { 'use strict';

    _ = _ && Object.prototype.hasOwnProperty.call(_, 'default') ? _['default'] : _;

    //@todo : complete with namespace managements
    function EventMgr() {
        var events = {};

        this.get = function (event) {
            if (event && events[event]) {
                return _.clone(events[event]);
            } else {
                return [];
            }
        };

        this.on = function (event, callback) {
            var tokens = event.split('.');
            if (tokens[0]) {
                var name = tokens.shift();
                events[name] = events[name] || [];
                events[name].push({
                    ns: tokens,
                    callback: callback
                });
            }
        };

        this.off = function (event) {
            if (event && events[event]) {
                events[event] = [];
            }
        };

        this.trigger = function (event, data) {
            if (events[event]) {
                _.forEach(events[event], function (e) {
                    //@todo check ns:
                    e.callback.apply(
                        {
                            type: event,
                            ns: []
                        },
                        data
                    );
                });
            }
        };
    }

    return EventMgr;

});