/*
 * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.form.Action The subclasses of this class provide actions to
 *        perform upon {@link Ext.form.BasicForm Form}s. <br>
 *        <br>
 *        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}. <br>
 *        <br>
 *        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.
 */
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 {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 {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 #Ext.form.Action-Action.CLIENT_INVALID CLIENT_INVALID},
	 * {@link #Ext.form.Action-Action.SERVER_INVALID SERVER_INVALID},
	 * {@link #Ext.form.Action-Action.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,
			timeout : (opts.timeout * 1000) || (this.form.timeout * 1000),
			upload : this.form.fileUpload ? this.success : undefined
		};
	}
};

/**
 * @class Ext.form.Action.Submit
 * @extends Ext.form.Action A class which handles submission of data from
 *          {@link Ext.form.BasicForm Form}s and processes the returned
 *          response. <br>
 *          <br>
 *          Instances of this class are only created by a
 *          {@link Ext.form.BasicForm Form} when submitting. <br>
 *          <br>
 *          A response packet must contain a boolean
 *          <tt style="font-weight:bold">success</tt> property, and,
 *          optionally an <tt style="font-weight:bold">errors</tt> property.
 *          The <tt style="font-weight:bold">errors</tt> property contains
 *          error messages for invalid fields. <br>
 *          <br>
 *          By default, response packets are assumed to be JSON, so a typical
 *          response packet may look like this: <br>
 *          <br>
 * 
 * <pre><code>
 *  {
 *  success: false,
 *  errors: {
 *  clientCode: &quot;Client not found&quot;,
 *  portOfLoading: &quot;This field must not be null&quot;
 *  }
 *  }
 * </code></pre>
 * 
 * <br>
 *          <br>
 *          Other data may be placed into the response for processing the the
 *          {@link Ext.form.BasicForm}'s callback or event handler methods. The
 *          object decoded from this JSON is available in the {@link #result}
 *          property.
 */
Ext.form.Action.Submit = function(form, options) {
	Ext.form.Action.Submit.superclass.constructor.call(this, form, options);
};

Ext.extend(Ext.form.Action.Submit, Ext.form.Action, {
			/**
			 * @cfg {boolean} clientValidation Determines whether a Form's
			 *      fields are validated in a final call to
			 *      {@link Ext.form.BasicForm#isValid isValid} prior to
			 *      submission. Pass <tt>false</tt> in the Form's submit
			 *      options to prevent this. If not defined, pre-submission
			 *      field validation is performed.
			 */
			type : 'submit',

			// private
			run : function() {
				var o = this.options;
				var method = this.getMethod();
				var isPost = method == 'POST';
				if (o.clientValidation === false || this.form.isValid()) {
					Ext.Ajax.request(Ext.apply(this.createCallback(o), {
								form : this.form.el.dom,
								url : this.getUrl(!isPost),
								method : method,
								params : isPost ? this.getParams() : null,
								isUpload : this.form.fileUpload
							}));

				} else if (o.clientValidation !== false) { // client validation
															// failed
					this.failureType = Ext.form.Action.CLIENT_INVALID;
					this.form.afterAction(this, false);
				}
			},

			// private
			success : function(response) {
				var result = this.processResponse(response);
				if (result === true || result.success) {
					this.form.afterAction(this, true);
					return;
				}
				if (result.errors) {
					this.form.markInvalid(result.errors);
					this.failureType = Ext.form.Action.SERVER_INVALID;
				}
				this.form.afterAction(this, false);
			},

			// private
			handleResponse : function(response) {
				if (this.form.errorReader) {
					var rs = this.form.errorReader.read(response);
					var errors = [];
					if (rs.records) {
						for (var i = 0, len = rs.records.length; i < len; i++) {
							var r = rs.records[i];
							errors[i] = r.data;
						}
					}
					if (errors.length < 1) {
						errors = null;
					}
					return {
						success : rs.success,
						errors : errors
					};
				}
				return Ext.decode(response.responseText);
			}
		});

/**
 * @class Ext.form.Action.Load
 * @extends Ext.form.Action A class which handles loading of data from a server
 *          into the Fields of an {@link Ext.form.BasicForm}. <br>
 *          <br>
 *          Instances of this class are only created by a
 *          {@link Ext.form.BasicForm Form} when submitting. <br>
 *          <br>
 *          A response packet <b>must</b> contain a boolean
 *          <tt style="font-weight:bold">success</tt> property, and a
 *          <tt style="font-weight:bold">data</tt> property. The
 *          <tt style="font-weight:bold">data</tt> property contains the
 *          values of Fields to load. The individual value object for each Field
 *          is passed to the Field's {@link Ext.form.Field#setValue setValue}
 *          method. <br>
 *          <br>
 *          By default, response packets are assumed to be JSON, so a typical
 *          response packet may look like this: <br>
 *          <br>
 * 
 * <pre><code>
 *  {
 *  success: true,
 *  data: {
 *  clientName: &quot;Fred. Olsen Lines&quot;,
 *  portOfLoading: &quot;FXT&quot;,
 *  portOfDischarge: &quot;OSL&quot;
 *  }
 *  }
 * </code></pre>
 * 
 * <br>
 *          <br>
 *          Other data may be placed into the response for processing the the
 *          {@link Ext.form.BasicForm Form}'s callback or event handler
 *          methods. The object decoded from this JSON is available in the
 *          {@link #result} property.
 */
Ext.form.Action.Load = function(form, options) {
	Ext.form.Action.Load.superclass.constructor.call(this, form, options);
	this.reader = this.form.reader;
};

Ext.extend(Ext.form.Action.Load, Ext.form.Action, {
			// private
			type : 'load',

			// private
			run : function() {
				Ext.Ajax.request(Ext.apply(this.createCallback(this.options), {
							method : this.getMethod(),
							url : this.getUrl(false),
							params : this.getParams()
						}));
			},

			// private
			success : function(response) {
				var result = this.processResponse(response);
				if (result === true || !result.success || !result.data) {
					this.failureType = Ext.form.Action.LOAD_FAILURE;
					this.form.afterAction(this, false);
					return;
				}
				this.form.clearInvalid();
				this.form.setValues(result.data);
				this.form.afterAction(this, true);
			},

			// private
			handleResponse : function(response) {
				if (this.form.reader) {
					var rs = this.form.reader.read(response);
					var data = rs.records && rs.records[0]
							? rs.records[0].data
							: null;
					return {
						success : rs.success,
						data : data
					};
				}
				return Ext.decode(response.responseText);
			}
		});

Ext.form.Action.ACTION_TYPES = {
	'load' : Ext.form.Action.Load,
	'submit' : Ext.form.Action.Submit
};