/*
 * Ext JS Library 2.2.1
 * Copyright(c) 2006-2009, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.form.Action
 * <p>The subclasses of this class provide actions to perform upon {@link Ext.form.BasicForm Form}s.</p>
 * <p>Instances of this class are only created by a {@link Ext.form.BasicForm Form} when
 * the Form needs to perform an action such as submit or load. The Configuration options
 * listed for this class are set through the Form's action methods: {@link Ext.form.BasicForm#submit submit},
 * {@link Ext.form.BasicForm#load load} and {@link Ext.form.BasicForm#doAction doAction}</p>
 * <p>The instance of Action which performed the action is passed to the success
 * and failure callbacks of the Form's action methods ({@link Ext.form.BasicForm#submit submit},
 * {@link Ext.form.BasicForm#load load} and {@link Ext.form.BasicForm#doAction doAction}),
 * and to the {@link Ext.form.BasicForm#actioncomplete actioncomplete} and
 * {@link Ext.form.BasicForm#actionfailed actionfailed} event handlers.</p>
 */
Ext.form.Action = function(form, options){
    this.form = form;
    this.options = options || {};
};

/**
 * Failure type returned when client side validation of the Form fails
 * thus aborting a submit action.
 * @type {String}
 * @static
 */
Ext.form.Action.CLIENT_INVALID = 'client';
/**
 * Failure type returned when server side validation of the Form fails
 * indicating that field-specific error messages have been returned in the
 * response's <tt style="font-weight:bold">errors</tt> property.
 * @type {String}
 * @static
 */
Ext.form.Action.SERVER_INVALID = 'server';
/**
 * Failure type returned when a communication error happens when attempting
 * to send a request to the remote server.
 * @type {String}
 * @static
 */
Ext.form.Action.CONNECT_FAILURE = 'connect';
/**
 * Failure type returned when no field values are returned in the response's
 * <tt style="font-weight:bold">data</tt> property.
 * @type {String}
 * @static
 */
Ext.form.Action.LOAD_FAILURE = 'load';

Ext.form.Action.prototype = {
/**
 * @cfg {String} url The URL that the Action is to invoke.
 */
/**
 * @cfg {Boolean} reset When set to <tt><b>true</b></tt>, causes the Form to be
 * {@link Ext.form.BasicForm.reset reset} on Action success. If specified, this happens
 * <b>before</b> the {@link #success} callback is called and before the Form's
 * {@link Ext.form.BasicForm.actioncomplete actioncomplete} event fires.
 */
/**
 * @cfg {String} method The HTTP method to use to access the requested URL. Defaults to the
 * {@link Ext.form.BasicForm}'s method, or if that is not specified, the underlying DOM form's method.
 */
/**
 * @cfg {Mixed} params Extra parameter values to pass. These are added to the Form's
 * {@link Ext.form.BasicForm#baseParams} and passed to the specified URL along with the Form's
 * input fields.
 */
/**
 * @cfg {Number} timeout The number of milliseconds to wait for a server response before
 * failing with the {@link #failureType} as {@link #Action.CONNECT_FAILURE}.
 */
/**
 * @cfg {Function} success The function to call when a valid success return packet is recieved.
 * The function is passed the following parameters:<ul class="mdetail-params">
 * <li><b>form</b> : Ext.form.BasicForm<div class="sub-desc">The form that requested the action</div></li>
 * <li><b>action</b> : Ext.form.Action<div class="sub-desc">The Action class. The {@link #result}
 * property of this object may be examined to perform custom postprocessing.</div></li>
 * </ul>
 */
/**
 * @cfg {Function} failure The function to call when a failure packet was recieved, or when an
 * error ocurred in the Ajax communication.
 * The function is passed the following parameters:<ul class="mdetail-params">
 * <li><b>form</b> : Ext.form.BasicForm<div class="sub-desc">The form that requested the action</div></li>
 * <li><b>action</b> : Ext.form.Action<div class="sub-desc">The Action class. If an Ajax
 * error ocurred, the failure type will be in {@link #failureType}. The {@link #result}
 * property of this object may be examined to perform custom postprocessing.</div></li>
 * </ul>
*/
/**
 * @cfg {Object} scope The scope in which to call the callback functions (The <tt>this</tt> reference
 * for the callback functions).
 */
/**
 * @cfg {String} waitMsg The message to be displayed by a call to {@link Ext.MessageBox#wait}
 * during the time the action is being processed.
 */
/**
 * @cfg {String} waitTitle The title to be displayed by a call to {@link Ext.MessageBox#wait}
 * during the time the action is being processed.
 */

/**
 * The type of action this Action instance performs.
 * Currently only "submit" and "load" are supported.
 * @type {String}
 */
    type : 'default',
/**
 * The type of failure detected. See {@link link Ext.form.Action#Action.CLIENT_INVALID CLIENT_INVALID},
 * {@link link Ext.form.Action#Action.SERVER_INVALID SERVER_INVALID},
 * {@link #link Ext.form.ActionAction.CONNECT_FAILURE CONNECT_FAILURE}, {@link Ext.form.Action#Action.LOAD_FAILURE LOAD_FAILURE}
 * @property failureType
 * @type {String}
 *//**
 * The XMLHttpRequest object used to perform the action.
 * @property response
 * @type {Object}
 *//**
 * The decoded response object containing a boolean <tt style="font-weight:bold">success</tt> property and
 * other, action-specific properties.
 * @property result
 * @type {Object}
 */

    // interface method
    run : function(options){

    },

    // interface method
    success : function(response){

    },

    // interface method
    handleResponse : function(response){

    },

    // default connection failure
    failure : function(response){
        this.response = response;
        this.failureType = Ext.form.Action.CONNECT_FAILURE;
        this.form.afterAction(this, false);
    },

    // private
    processResponse : function(response){
        this.response = response;
        if(!response.responseText){
            return true;
        }
        this.result = this.handleResponse(response);
        return this.result;
    },

    // utility functions used internally
    getUrl : function(appendParams){
        var url = this.options.url || this.form.url || this.form.el.dom.action;
        if(appendParams){
            var p = this.getParams();
            if(p){
                url += (url.indexOf('?') != -1 ? '&' : '?') + p;
            }
        }
        return url;
    },

    // private
    getMethod : function(){
        return (this.options.method || this.form.method || this.form.el.dom.method || 'POST').toUpperCase();
    },

    // private
    getParams : function(){
        var bp = this.form.baseParams;
        var p = this.options.params;
        if(p){
            if(typeof p == "object"){
                p = Ext.urlEncode(Ext.applyIf(p, bp));
            }else if(typeof p == 'string' && bp){
                p += '&' + Ext.urlEncode(bp);
            }
        }else if(bp){
            p = Ext.urlEncode(bp);
        }
        return p;
    },

    // private
    createCallback : function(opts){
		var opts = opts || {};
        return {
            success: this.success,
            failure: this.failure,
            scope: this,