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

TAO QTI Item Runner modules

import _ from 'lodash';

//@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
                );
            });
        }
    };
}

export default EventMgr;