/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
(function(){
    var BEFOREREQUEST = "beforerequest",
        REQUESTCOMPLETE = "requestcomplete",
        REQUESTEXCEPTION = "requestexception",
        UNDEFINED = undefined,
        LOAD = 'load',
        POST = 'POST',
        GET = 'GET',
        WINDOW = window;

    /**
     * @class Ext.data.Connection
     * @extends Ext.util.Observable
     * <p>The class encapsulates a connection to the page's originating domain, allowing requests to be made
     * either to a configured URL, or to a URL specified at request time.</p>
     * <p>Requests made by this class are asynchronous, and will return immediately. No data from
     * the server will be available to the statement immediately following the {@link #request} call.
     * To process returned data, use a
     * <a href="#request-option-success" ext:member="request-option-success" ext:cls="Ext.data.Connection">success callback</a>
     * in the request options object,
     * or an {@link #requestcomplete event listener}.</p>
     * <p><h3>File Uploads</h3><a href="#request-option-isUpload" ext:member="request-option-isUpload" ext:cls="Ext.data.Connection">File uploads</a> are not performed using normal "Ajax" techniques, that
     * is they are <b>not</b> performed using XMLHttpRequests. Instead the form is submitted in the standard
     * manner with the DOM <tt>&lt;form></tt> element temporarily modified to have its
     * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
     * to a dynamically generated, hidden <tt>&lt;iframe></tt> which is inserted into the document
     * but removed after the return data has been gathered.</p>
     * <p>The server response is parsed by the browser to create the document for the IFRAME. If the
     * server is using JSON to send the return object, then the
     * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
     * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
     * <p>Characters which are significant to an HTML parser must be sent as HTML entities, so encode
     * "&lt;" as "&amp;lt;", "&amp;" as "&amp;amp;" etc.</p>
     * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
     * is created containing a <tt>responseText</tt> property in order to conform to the
     * requirements of event handlers and callbacks.</p>
     * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a>
     * and some server technologies (notably JEE) may require some custom processing in order to
     * retrieve parameter names and parameter values from the packet content.</p>
     * <p>Also note that it's not possible to check the response code of the hidden iframe, so the success handler will ALWAYS fire.</p>
     * @constructor
     * @param {Object} config a configuration object.
     */
    Ext.data.Connection = function(config){
        Ext.apply(this, config);
        this.addEvents(
            /**
             * @event beforerequest
             * Fires before a network request is made to retrieve a data object.
             * @param {Connection} conn This Connection object.
             * @param {Object} options The options config object passed to the {@link #request} method.
             */
            BEFOREREQUEST,
            /**
             * @event requestcomplete
             * Fires if the request was successfully completed.
             * @param {Connection} conn This Connection object.
             * @param {Object} response The XHR object containing the response data.
             * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
             * for details.
             * @param {Object} options The options config object passed to the {@link #request} method.
             */
            REQUESTCOMPLETE,
            /**
             * @event requestexception
             * Fires if an error HTTP status was returned from the server.
             * See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html">HTTP Status Code Definitions</a>
             * for details of HTTP status codes.
             * @param {Connection} conn This Connection object.
             * @param {Object} response The XHR object containing the response data.
             * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
             * for details.
             * @param {Object} options The options config object passed to the {@link #request} method.
             */
            REQUESTEXCEPTION
        );
        Ext.data.Connection.superclass.constructor.call(this);
    };

    Ext.extend(Ext.data.Connection, Ext.util.Observable, {
        /**
         * @cfg {String} url (Optional) <p>The default URL to be used for requests to the server. Defaults to undefined.</p>
         * <p>The <code>url</code> config may be a function which <i>returns</i> the URL to use for the Ajax request. The scope
         * (<code><b>this</b></code> reference) of the function is the <code>scope</code> option passed to the {@link #request} method.</p>
         */
        /**
         * @cfg {Object} extraParams (Optional) An object containing properties which are used as
         * extra parameters to each request made by this object. (defaults to undefined)
         */
        /**
         * @cfg {Object} defaultHeaders (Optional) An object containing request headers which are added
         *  to each request made by this object. (defaults to undefined)
         */
        /**
         * @cfg {String} method (Optional) The default HTTP method to be used for requests.
         * (defaults to undefined; if not set, but {@link #request} params are present, POST will be used;
         * otherwise, GET will be used.)
         */
        /**
         * @cfg {Number} timeout (Optional) The timeout in milliseconds to be used for requests. (defaults to 30000)
         */
        timeout : 30000,
        /**
         * @cfg {Boolean} autoAbort (Optional) Whether this request should abort any pending requests. (defaults to false)
         * @type Boolean
         */
        autoAbort:false,

        /**
         * @cfg {Boolean} disableCaching (Optional) True to add a unique cache-buster param to GET requests. (defaults to true)
         * @type Boolean
         */
        disableCaching: true,

        /**
         * @cfg {String} disableCachingParam (Optional) Change the parameter which is sent went disabling caching
         * through a cache buster. Defaults to '_dc'
         * @type String
         */
        disableCachingParam: '_dc',

        /**
         * <p>Sends an HTTP request to a remote server.</p>
         * <p><b>Important:</b> Ajax server requests are asynchronous, and this call will
         * return before the response has been received. Process any returned data
         * in a callback function.</p>
         * <pre><code>
Ext.Ajax.request({
   url: 'ajax_demo/sample.json',
   success: function(response, opts) {
      var obj = Ext.decode(response.responseText);
      console.dir(obj);
   },
   failure: function(response, opts) {
      console.log('server-side failure with status code ' + response.status);
   }
});
         * </code></pre>
         * <p>To execute a callback function in the correct scope, use the <tt>scope</tt> option.</p>
         * @param {Object} options An object which may contain the following properties:<ul>
         * <li><b>url</b> : String/Function (Optional)<div class="sub-desc">The URL to
         * which to send the request, or a function to call which returns a URL string. The scope of the
         * function is specified by the <tt>scope</tt> option. Defaults to the configured
         * <tt>{@link #url}</tt>.</div></li>
         * <li><b>params</b> : Object/String/Function (Optional)<div class="sub-desc">
         * An object containing properties which are used as parameters to the
         * request, a url encoded string or a function to call to get either. The scope of the function
         * is specified by the <tt>scope</tt> option.</div></li>
         * <li><b>method</b> : String (Optional)<div class="sub-desc">The HTTP method to use
         * for the request. Defaults to the configured method, or if no method was configured,
         * "GET" if no parameters are being sent, and "POST" if parameters are being sent.  Note that
         * the method name is case-sensitive and should be all caps.</div></li>
         * <li><b>callback</b> : Function (Optional)<div class="sub-desc">The
         * function to be called upon receipt of the HTTP response. The callback is
         * called regardless of success or failure and is passed the following
         * parameters:<ul>
         * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
         * <li><b>success</b> : Boolean<div class="sub-desc">True if the request succeeded.</div></li>
         * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.
         * See <a href="http://www.w3.org/TR/XMLHttpRequest/">http://www.w3.org/TR/XMLHttpRequest/</a> for details about
         * accessing elements of the response.</div></li>
         * </ul></div></li>
         * <li><a id="request-option-success"></a><b>success</b> : Function (Optional)<div class="sub-desc">The function
         * to be called upon success of the request. The callback is passed the following
         * parameters:<ul>
         * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
         * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
         * </ul></div></li>
         * <li><b>failure</b> : Function (Optional)<div class="sub-desc">The function
         * to be called upon failure of the request. The callback is passed the
         * following parameters:<ul>
         * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
         * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
         * </ul></div></li>
         * <li><b>scope</b> : Object (Optional)<div class="sub-desc">The scope in
         * which to execute the callbacks: The "this" object for the callback function. If the <tt>url</tt>, or <tt>params</tt> options were
         * specified as functions from which to draw values, then this also serves as the scope for those function calls.
         * Defaults to the browser window.</div></li>
         * <li><b>timeout</b> : Number (Optional)<div class="sub-desc">The timeout in milliseconds to be used for this request. Defaults to 30 seconds.</div></li>
         * <li><b>form</b> : Element/HTMLElement/String (Optional)<div class="sub-desc">The <tt>&lt;form&gt;</tt>
         * Element or the id of the <tt>&lt;form&gt;</tt> to pull parameters from.</div></li>
         * <li><a id="request-option-isUpload"></a><b>isUpload</b> : Boolean (Optional)<div class="sub-desc"><b>Only meaningful when used
         * with the <tt>form</tt> option</b>.
         * <p>True if the form object is a file upload (will be set automatically if the form was
         * configured with <b><tt>enctype</tt></b> "multipart/form-data").</p>
         * <p>File uploads are not performed using normal "Ajax" techniques, that is they are <b>not</b>
         * performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the
         * DOM <tt>&lt;form></tt> element temporarily modified to have its
         * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
         * to a dynamically generated, hidden <tt>&lt;iframe></tt> which is inserted into the document
         * but removed after the return data has been gathered.</p>
         * <p>The server response is parsed by the browser to create the document for the IFRAME. If the
         * server is using JSON to send the return object, then the
         * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
         * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
         * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
         * is created containing a <tt>responseText</tt> property in order to conform to the
         * requirements of event handlers and callbacks.</p>
         * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a>
         * and some server technologies (notably JEE) may require some custom processing in order to
         * retrieve parameter names and parameter values from the packet content.</p>
         * </div></li>
         * <li><b>headers</b> : Object (Optional)<div class="sub-desc">Request
         * headers to set for the request.</div></li>
         * <li><b>xmlData</b> : Object (Optional)<div class="sub-desc">XML document
         * to use for the post. Note: This will be used instead of params for the post
         * data. Any params will be appended to the URL.</div></li>
         * <li><b>jsonData</b> : Object/String (Optional)<div class="sub-desc">JSON
         * data to use as the post. Note: This will be used instead of params for the post
         * data. Any params will be appended to the URL.</div></li>
         * <li><b>disableCaching</b> : Boolean (Optional)<div class="sub-desc">True
         * to add a unique cache-buster param to GET requests.</div></li>
         * </ul></p>
         * <p>The options object may also contain any other property which might be needed to perform
         * postprocessing in a callback because it is passed to callback functions.</p>
         * @return {Number} transactionId The id of the server transaction. This may be used
         * to cancel the request.
         */
        request : function(o){
            var me = this;
            if(me.fireEvent(BEFOREREQUEST, me, o)){
                if (o.el) {
                    if(!Ext.isEmpty(o.indicatorText)){
                        me.indicatorText = '<div class="loading-indicator">'+o.indicatorText+"</div>";
                    }
                    if(me.indicatorText) {
                        Ext.getDom(o.el).innerHTML = me.indicatorText;
                    }
                    o.success = (Ext.isFunction(o.success) ? o.success : function(){}).createInterceptor(function(response) {
                        Ext.getDom(o.el).innerHTML = response.responseText;
                    });
                }

                var p = o.params,
                    url = o.url || me.url,
                    method,
                    cb = {success: me.handleResponse,
                          failure: me.handleFailure,
                          scope: me,
                          argument: {options: o},
                          timeout : Ext.num(o.timeout, me.timeout)
                    },
                    form,
                    serForm;


                if (Ext.isFunction(p)) {
                    p = p.call(o.scope||WINDOW, o);
                }

                p = Ext.urlEncode(me.extraParams, Ext.isObject(p) ? Ext.urlEncode(p) : p);

                if (Ext.isFunction(url)) {
                    url = url.call(o.scope || WINDOW, o);
                }

                if((form = Ext.getDom(o.form))){
                    url = url || form.action;
                     if(o.isUpload || (/multipart\/form-data/i.test(form.getAttribute("enctype")))) {
                         return me.doFormUpload.call(me, o, p, url);
                     }
                    serForm = Ext.lib.Ajax.serializeForm(form);
                    p = p ? (p + '&' + serForm) : serForm;
                }

                method = o.method || me.method || ((p || o.xmlData || o.jsonData) ? POST : GET);

                if(method === GET && (me.disableCaching && o.disableCaching !== false) || o.disableCaching === true){
                    var dcp = o.disableCachingParam || me.disableCachingParam;
                    url = Ext.urlAppend(url, dcp + '=' + (new Date().getTime()));
                }

                o.headers = Ext.applyIf(o.headers || {}, me.defaultHeaders || {});

                if(o.autoAbort === true || me.autoAbort) {
                    me.abort();
                }

                if((method == GET || o.xmlData || o.jsonData) && p){
                    url = Ext.urlAppend(url, p);
                    p = '';
                }
                return (me.transId = Ext.lib.Ajax.request(method, url, cb, p, o));
            }else{
                return o.callback ? o.callback.apply(o.scope, [o,UNDEFINED,UNDEFINED]) : null;
            }
        },

        /**
         * Determine whether this object has a request outstanding.
         * @param {Number} transactionId (Optional) defaults to the last transaction
         * @return {Boolean} True if there is an outstanding request.
         */
        isLoading : function(transId){
            return transId ? Ext.lib.Ajax.isCallInProgress(transId) : !! this.transId;
        },

        /**
         * Aborts any outstanding request.
         * @param {Number} transactionId (Optional) defaults to the last transaction
         */
        abort : function(transId){
            if(transId || this.isLoading()){
                Ext.lib.Ajax.abort(transId || this.transId);
            }
        },

        // private
        handleResponse : function(response){
            this.transId = false;
            var options = response.argument.options;
            response.argument = options ? options.argument : null;
            this.fireEvent(REQUESTCOMPLETE, this, response, options);
            if(options.success){
                options.success.call(options.scope, response, options);
            }
            if(options.callback){
                options.callback.call(options.scope, options, true, response);
            }
        },

        // private
        handleFailure : function(response, e){
            this.transId = false;
            var options = response.argument.options;
            response.argument = options ? options.argument : null;
            this.fireEvent(REQUESTEXCEPTION, this, response, options, e);
            if(options.failure){
                options.failure.call(options.scope, response, options);
            }
            if(options.callback){
                options.callback.call(options.scope, options, false, response);
            }
        },

        // private
        doFormUpload : function(o, ps, url){
            var id = Ext.id(),
                doc = document,
                frame = doc.createElement('iframe'),
                form = Ext.getDom(o.form),
                hiddens = [],
                hd,
                encoding = 'multipart/form-data',
                buf = {
                    target: form.target,
                    method: form.method,
                    encoding: form.encoding,
                    enctype: form.enctype,
                    action: form.action
                };

            /*
             * Originally this behaviour was modified for Opera 10 to apply the secure URL after
             * the frame had been added to the document. It seems this has since been corrected in
             * Opera so the behaviour has been reverted, the URL will be set before being added.
             */
            Ext.fly(frame).set({
                id: id,
                name: id,
                cls: 'x-hidden',
                src: Ext.SSL_SECURE_URL
            }); 

            doc.body.appendChild(frame);

            // This is required so that IE doesn't pop the response up in a new window.
            if(Ext.isIE){
               document.frames[id].name = id;
            }


            Ext.fly(form).set({
                target: id,
                method: POST,
                enctype: encoding,
                encoding: encoding,
                action: url || buf.action
            });

            // add dynamic params
            Ext.iterate(Ext.urlDecode(ps, false), function(k, v){
                hd = doc.createElement('input');
                Ext.fly(hd).set({
                    type: 'hidden',
                    value: v,
                    name: k
                });
                form.appendChild(hd);
                hiddens.push(hd);
            });

            function cb(){
                var me = this,
                    // bogus response object
                    r = {responseText : '',
                         responseXML : null,
                         argument : o.argument},
                    doc,
                    firstChild;

                try{
                    doc = frame.contentWindow.document || frame.contentDocument || WINDOW.frames[id].document;
                    if(doc){
                        if(doc.body){
                            if(/textarea/i.test((firstChild = doc.body.firstChild || {}).tagName)){ // json response wrapped in textarea
                                r.responseText = firstChild.value;
                            }else{
                                r.responseText = doc.body.innerHTML;
                            }
                        }
                        //in IE the document may still have a body even if returns XML.
                        r.responseXML = doc.XMLDocument || doc;
                    }
                }
                catch(e) {}

                Ext.EventManager.removeListener(frame, LOAD, cb, me);

                me.fireEvent(REQUESTCOMPLETE, me, r, o);

                function runCallback(fn, scope, args){
                    if(Ext.isFunction(fn)){
                        fn.apply(scope, args);
                    }
                }

                runCallback(o.success, o.scope, [r, o]);
                runCallback(o.callback, o.scope, [o, true, r]);

                if(!me.debugUploads){
                    setTimeout(function(){Ext.removeNode(frame);}, 100);
                }
            }

            Ext.EventManager.on(frame, LOAD, cb, this);
            form.submit();

            Ext.fly(form).set(buf);
            Ext.each(hiddens, function(h) {
                Ext.removeNode(h);
            });
        }
    });
})();

/**
 * @class Ext.Ajax
 * @extends Ext.data.Connection
 * <p>The global Ajax request class that provides a simple way to make Ajax requests
 * with maximum flexibility.</p>
 * <p>Since Ext.Ajax is a singleton, you can set common properties/events for it once
 * and override them at the request function level only if necessary.</p>
 * <p>Common <b>Properties</b> you may want to set are:<div class="mdetail-params"><ul>
 * <li><b><tt>{@link #method}</tt></b><p class="sub-desc"></p></li>
 * <li><b><tt>{@link #extraParams}</tt></b><p class="sub-desc"></p></li>
 * <li><b><tt>{@link #url}</tt></b><p class="sub-desc"></p></li>
 * </ul></div>
 * <pre><code>
// Default headers to pass in every request
Ext.Ajax.defaultHeaders = {
    'Powered-By': 'Ext'
};
 * </code></pre>
 * </p>
 * <p>Common <b>Events</b> you may want to set are:<div class="mdetail-params"><ul>
 * <li><b><tt>{@link Ext.data.Connection#beforerequest beforerequest}</tt></b><p class="sub-desc"></p></li>
 * <li><b><tt>{@link Ext.data.Connection#requestcomplete requestcomplete}</tt></b><p class="sub-desc"></p></li>
 * <li><b><tt>{@link Ext.data.Connection#requestexception requestexception}</tt></b><p class="sub-desc"></p></li>
 * </ul></div>
 * <pre><code>
// Example: show a spinner during all Ajax requests
Ext.Ajax.on('beforerequest', this.showSpinner, this);
Ext.Ajax.on('requestcomplete', this.hideSpinner, this);
Ext.Ajax.on('requestexception', this.hideSpinner, this);
 * </code></pre>
 * </p>
 * <p>An example request:</p>
 * <pre><code>
// Basic request
Ext.Ajax.{@link Ext.data.Connection#request request}({
   url: 'foo.php',
   success: someFn,
   failure: otherFn,
   headers: {
       'my-header': 'foo'
   },
   params: { foo: 'bar' }
});

// Simple ajax form submission
Ext.Ajax.{@link Ext.data.Connection#request request}({
    form: 'some-form',
    params: 'foo=bar'
});
 * </code></pre>
 * </p>
 * @singleton
 */
Ext.Ajax = new Ext.data.Connection({
    /**
     * @cfg {String} url @hide
     */
    /**
     * @cfg {Object} extraParams @hide
     */
    /**
     * @cfg {Object} defaultHeaders @hide
     */
    /**
     * @cfg {String} method (Optional) @hide
     */
    /**
     * @cfg {Number} timeout (Optional) @hide
     */
    /**
     * @cfg {Boolean} autoAbort (Optional) @hide
     */

    /**
     * @cfg {Boolean} disableCaching (Optional) @hide
     */

    /**
     * @property  disableCaching
     * True to add a unique cache-buster param to GET requests. (defaults to true)
     * @type Boolean
     */
    /**
     * @property  url
     * The default URL to be used for requests to the server. (defaults to undefined)
     * If the server receives all requests through one URL, setting this once is easier than
     * entering it on every request.
     * @type String
     */
    /**
     * @property  extraParams
     * An object containing properties which are used as extra parameters to each request made
     * by this object (defaults to undefined). Session information and other data that you need
     * to pass with each request are commonly put here.
     * @type Object
     */
    /**
     * @property  defaultHeaders
     * An object containing request headers which are added to each request made by this object
     * (defaults to undefined).
     * @type Object
     */
    /**
     * @property  method
     * The default HTTP method to be used for requests. Note that this is case-sensitive and
     * should be all caps (defaults to undefined; if not set but params are present will use
     * <tt>"POST"</tt>, otherwise will use <tt>"GET"</tt>.)
     * @type String
     */
    /**
     * @property  timeout
     * The timeout in milliseconds to be used for requests. (defaults to 30000)
     * @type Number
     */

    /**
     * @property  autoAbort
     * Whether a new request should abort any pending requests. (defaults to false)
     * @type Boolean
     */
    autoAbort : false,

    /**
     * Serialize the passed form into a url encoded string
     * @param {String/HTMLElement} form
     * @return {String}
     */
    serializeForm : function(form){
        return Ext.lib.Ajax.serializeForm(form);
    }
});
