source: trunk/www.guidonia.net/wp/wp-includes/js/tw-sack.dev.js@ 44

/* Simple AJAX Code-Kit (SACK) v1.6.1 */
/* ©2005 Gregory Wild-Smith */
/* www.twilightuniverse.com */
/* Software licenced under a modified X11 licence,
   see documentation or authors website for more details */

function sack(file) {
        this.xmlhttp = null;

        this.resetData = function() {
                this.method = "POST";
                this.queryStringSeparator = "?";
                this.argumentSeparator = "&";
                this.URLString = "";
                this.encodeURIString = true;
                this.execute = false;
                this.element = null;
                this.elementObj = null;
                this.requestFile = file;
                this.vars = new Object();
                this.responseStatus = new Array(2);
        };

        this.resetFunctions = function() {
                this.onLoading = function() { };
                this.onLoaded = function() { };
                this.onInteractive = function() { };
                this.onCompletion = function() { };
                this.onError = function() { };
                this.onFail = function() { };
        };

        this.reset = function() {
                this.resetFunctions();
                this.resetData();
        };

        this.createAJAX = function() {
                try {
                        this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
                } catch (e1) {
                        try {
                                this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e2) {
                                this.xmlhttp = null;
                        }
                }

                if (! this.xmlhttp) {
                        if (typeof XMLHttpRequest != "undefined") {
                                this.xmlhttp = new XMLHttpRequest();
                        } else {
                                this.failed = true;
                        }
                }
        };

        this.setVar = function(name, value){
                this.vars[name] = Array(value, false);
        };

        this.encVar = function(name, value, returnvars) {
                if (true == returnvars) {
                        return Array(encodeURIComponent(name), encodeURIComponent(value));
                } else {
                        this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
                }
        }

        this.processURLString = function(string, encode) {
                encoded = encodeURIComponent(this.argumentSeparator);
                regexp = new RegExp(this.argumentSeparator + "|" + encoded);
                varArray = string.split(regexp);
                for (i = 0; i < varArray.length; i++){
                        urlVars = varArray[i].split("=");
                        if (true == encode){
                                this.encVar(urlVars[0], urlVars[1]);
                        } else {
                                this.setVar(urlVars[0], urlVars[1]);
                        }
                }
        }

        this.createURLString = function(urlstring) {
                if (this.encodeURIString && this.URLString.length) {
                        this.processURLString(this.URLString, true);
                }

                if (urlstring) {
                        if (this.URLString.length) {
                                this.URLString += this.argumentSeparator + urlstring;
                        } else {
                                this.URLString = urlstring;
                        }
                }

                // prevents caching of URLString
                this.setVar("rndval", new Date().getTime());

                urlstringtemp = new Array();
                for (key in this.vars) {
                        if (false == this.vars[key][1] && true == this.encodeURIString) {
                                encoded = this.encVar(key, this.vars[key][0], true);
                                delete this.vars[key];
                                this.vars[encoded[0]] = Array(encoded[1], true);
                                key = encoded[0];
                        }

                        urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
                }
                if (urlstring){
                        this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
                } else {
                        this.URLString += urlstringtemp.join(this.argumentSeparator);
                }
        }

        this.runResponse = function() {
                eval(this.response);
        }

        this.runAJAX = function(urlstring) {
                if (this.failed) {
                        this.onFail();
                } else {
                        this.createURLString(urlstring);
                        if (this.element) {
                                this.elementObj = document.getElementById(this.element);
                        }
                        if (this.xmlhttp) {
                                var self = this;
                                if (this.method == "GET") {
                                        totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
                                        this.xmlhttp.open(this.method, totalurlstring, true);
                                } else {
                                        this.xmlhttp.open(this.method, this.requestFile, true);
                                        try {
                                                this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
                                        } catch (e) { }
                                }

                                this.xmlhttp.onreadystatechange = function() {
                                        switch (self.xmlhttp.readyState) {
                                                case 1:
                                                        self.onLoading();
                                                        break;
                                                case 2:
                                                        self.onLoaded();
                                                        break;
                                                case 3:
                                                        self.onInteractive();
                                                        break;
                                                case 4:
                                                        self.response = self.xmlhttp.responseText;
                                                        self.responseXML = self.xmlhttp.responseXML;
                                                        self.responseStatus[0] = self.xmlhttp.status;
                                                        self.responseStatus[1] = self.xmlhttp.statusText;

                                                        if (self.execute) {
                                                                self.runResponse();
                                                        }

                                                        if (self.elementObj) {
                                                                elemNodeName = self.elementObj.nodeName;
                                                                elemNodeName.toLowerCase();
                                                                if (elemNodeName == "input"
                                                                || elemNodeName == "select"
                                                                || elemNodeName == "option"
                                                                || elemNodeName == "textarea") {
                                                                        self.elementObj.value = self.response;
                                                                } else {
                                                                        self.elementObj.innerHTML = self.response;
                                                                }
                                                        }
                                                        if (self.responseStatus[0] == "200") {
                                                                self.onCompletion();
                                                        } else {
                                                                self.onError();
                                                        }

                                                        self.URLString = "";
                                                        break;
                                        }
                                };

                                this.xmlhttp.send(this.URLString);
                        }
                }
        };

        this.reset();
        this.createAJAX();
}