// JavaScript Document
/**

 * @author alexander.farkas

 * @version 1.21 

 */

(function($){

    $.extend({

        manageAjax: function(o){

            o = $.extend({

                manageType: 'normal',

                maxReq: 0,

                blockSameRequest: false,

				global: true

            }, o);

            return new $.ajaxManager(o);

        },

        ajaxManager: function(o){

            this.opt = o;

            this.queue = [];

        }

    });

    $.extend($.ajaxManager.prototype, {

        add: function(o){

			var quLen = this.queue.length, s = this.opt, q = this.queue, self = this, i, j;

			o = $.extend({}, s, o);

            var cD = (o.data && typeof o.data != "string") ? $.param(o.data) : o.data;

            if (s.blockSameRequest) {

                var toPrevent = false;

                for (i = 0; i < quLen; i++) {

                    if (q[i] && q[i].data === cD && q[i].url === o.url && q[i].type === o.type) {

                        toPrevent = true;

                        break;

                    }

                }

                if (toPrevent) {

                    return false;

                }

            }

            q[quLen] = {

                fnError: o.error,

                fnSuccess: o.success,

                fnComplete: o.complete,

                fnAbort: o.abort,

                error: [],

                success: [],

                complete: [],

                done: false,

                queued: false,

                data: cD,

                url: o.url,

                type: o.type,

                xhr: null

            };

            

            o.error = function(){

                if (q[quLen]) {

                    q[quLen].error = arguments;

                }

            };

            o.success = function(){

                if (q[quLen]) {

                    q[quLen].success = arguments;

                }

            };

            o.abort = function(){

                if (q[quLen]) {

                    q[quLen].abort = arguments;

                }

            };

			

            function startCallbacks(num, opts){

                if (q[num].fnError && q[num].error.length) {

                    q[num].fnError.apply(opts || $, q[num].error);

                }

				

                if (q[num].fnSuccess) {

                   

					q[num].fnSuccess.apply(opts || $, q[num].success);

                }

                if (q[num].fnComplete) {

                    q[num].fnComplete.apply(opts || $, q[num].complete);

                }

                self.abort(num, true);

            }

            

            o.complete = function(){

                if (!q[quLen]) {

                    return;

                }

                q[quLen].complete = arguments;

                q[quLen].done = true;

                switch (s.manageType) {

                    case 'sync':

                        if (quLen === 0 || !q[quLen - 1]) {

                            var curQLen = q.length;

                            for (i = quLen; i < curQLen; i++) {

                                if (q[i]) {

                                    if (q[i].done) {

										startCallbacks(i, this);

                                    }

                                    else {

                                        break;

                                    }

                                }

                                

                            }

                        }

                        break;

                    case 'queue':

                        if (quLen === 0 || !q[quLen - 1]) {

                            var curQLen = q.length;

                            for (i = 0, j = 0; i < curQLen; i++) {

                                if (q[i] && q[i].queued) {

                                    q[i].xhr = jQuery.ajax(q[i].xhr);

                                    q[i].queued = false;

                                    break;

                                }

                            }

                        }

                        startCallbacks(quLen, this);

                        break;

                    case 'abortOld':

                        startCallbacks(quLen, this);

                        for (i = quLen; i >= 0; i--) {

                            if (q[i]) {

                                self.abort(i);

                            }

                        }

                        break;

                    default:

                        startCallbacks(quLen, this);

                        break;

                }

            };

            

            if (s.maxReq) {

                if (s.manageType != 'queue') {

                    for (i = quLen, j = 0; i >= 0; i--) {

                        if (j >= s.maxReq) {

                            this.abort(i);

                        }

                        if (q[i]) {

                            j++;

                        }

                    }

                }

                else {

                    for (i = 0, j = 0; i <= quLen && !q[quLen].queued; i++) {

                        if (q[i] && !q[i].queued) 

                            j++;

                        if (j > s.maxReq) 

                            q[quLen].queued = true;

                    }

                }

            }

            q[quLen].xhr = (q[quLen].queued) ? o : jQuery.ajax(o);

            return quLen;

        },

        cleanUp: function(){

            this.queue = [];

        },

        abort: function(num, completed){

            var qLen = this.queue.length, s = this.opt, q = this.queue, self = this, i;

            function del(num){

                if (!q[num]) {

                    return;

                }

                ((!completed && q[num].fnAbort) && q[num].fnAbort.apply($, [num]));

                if (!q[num]) {

                    return;

                }

                if (q[num].xhr) {

                    if (typeof q[num].xhr.abort != 'undefined') {

                        q[num].xhr.abort();

                    }

                    if (typeof q[num].xhr.close != 'undefined') {

                        q[num].xhr.close();

                    }

                    q[num].xhr = null;

                }

				// Handle the global AJAX counter

			

				if ( s.global && $.active && ! --$.active){

					$.event.trigger( "ajaxStop" );

				}

                q[num] = null;

            }

            if (!num && num !== 0) {

                for (i = 0; i < qLen; i++) {

                    del(i);

                }

                this.cleanUp();

            }

            else {

                del(num);

                var allowCleaning = true;

                for (i = qLen; i >= 0; i--) {

                    if (q[i]) {

                        allowCleaning = false;

                        break;

                    }

                }

                if (allowCleaning) {

                    this.cleanUp();

                }

            }

        }

    });

})(jQuery);