Traffic Cop Source

trafficCop.js

/*
    TrafficCop
    Author: Jim Cowart
    License: Dual licensed MIT (http://www.opensource.org/licenses/mit-license) & GPL (http://www.opensource.org/licenses/gpl-license)
    Version 0.1.0
*/
(function($, undefined) {

var inProgress = {};

$.trafficCop = function(url, options) {
    var reqOptions = url, key;
    if(arguments.length === 2) {
        reqOptions = $.extend(true, options, { url: url });
    }
    key = JSON.stringify(reqOptions);
    if(inProgress[key]) {
        inProgress[key].successCallbacks.push(reqOptions.success);
        inProgress[key].errorCallbacks.push(reqOptions.error);
        return;
    }

    var remove = function() {
            delete inProgress[key];
        },
        traffic = {
            successCallbacks: [reqOptions.success],
            errorCallbacks: [reqOptions.error],
            success: function(response) {
                $.each($(inProgress[key].successCallbacks), function(idx,item){ item(response); });
                remove();
            },
            error: function(exception) {
                $.each($(inProgress[key].errorCallbacks), function(idx,item){ item(exception); });
                remove();
            }
        };
    inProgress[key] = $.extend(true, {}, reqOptions, traffic);
    $.ajax(inProgress[key]);
};

})(jQuery);