Utility object to add wp-like actions

gistfile1.txt

(function ($) {
    "use strict";

    /**
     * Holds the list of all registered actions
     * @see this.addAction
     * @see this.hasAction
     * @see this.doAction
     * @type {{}}
     */
    var actions = {};

    /**
     * Utility object to add wp-like actions
     * @type {{_sprintf: jQuery.AfsUtil._sprintf, addAction: jQuery.AfsUtil.addAction, doAction: jQuery.AfsUtil.doAction, hasAction: (function(*): boolean), removeAction: jQuery.AfsUtil.removeAction}}
     * @usage addAction('action-name', fn( [arg1,arg,2] ) );
     * @usage doAction( 'action-name', fn( arg1, arg2,...))
     */
    $.AfsUtil = {
        /**
         * Replace the indexed placeholders from the provides string with the replacements from data
         *
         * sprintf("This is a {0} {1} test", ["Hello", "World"]);
         * sprintf("This is a {p1} {p2} test", { p1: "Hello", p2: "World" });
         *
         * @param {string} str
         * @param {{}|[]} data
         * @return {*}
         */
        _sprintf: function (str, data) {
            if (typeof str === 'string' && (data instanceof Array)) {

                return str.replace(/({\d})/g, function (i) {
                    return data[i.replace(/{/, '').replace(/}/, '')];
                });
            }
            else if (typeof str === 'string' && (data instanceof Object)) {
                for (var key in data) {
                    return str.replace(/({([^}]+)})/g, function (i) {
                        key = i.replace(/{/, '').replace(/}/, '');
                        if (!data[key]) {
                            return i;
                        }
                        return data[key];
                    });
                }
            }
            return false;
        },
        addAction: function (name, callback) {
            if (!actions[name]) {
                actions[name] = [];
            }
            actions[name].push(callback);
        },
        /**
         *
         * @param {String} name
         * @param {[]}args
         */
        doAction: function (name, args) {
            if (actions[name] && actions[name].length > 0) {
                $.each(actions[name], function (a, fn) {
                    if (typeof(fn) === 'function') {
                        //#! The first argument MUST be the scope of "this"
                        fn.apply((args ? args[0] : this), args || []);
                    }
                });
            }
        },
        hasAction: function (name) {
            return (!!actions[name]);
        },
        removeAction: function (name) {
            if (this.hasAction(name)) {
                delete(actions[name]);
            }
        }
    };
})(jQuery);