/*
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This file is part of Ext JS 4.2
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Copyright (c) 2011-2013 Sencha Inc
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Contact: http://www.sencha.com/contact
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GNU General Public License Usage
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This file may be used under the terms of the GNU General Public License version 3.0 as
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published by the Free Software Foundation and appearing in the file LICENSE included in the
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packaging of this file.
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Please review the following information to ensure the GNU General Public License version 3.0
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requirements will be met: http://www.gnu.org/copyleft/gpl.html.
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If you are unsure which license is appropriate for your use, please contact the sales department
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at http://www.sencha.com/contact.
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Build date: 2013-05-16 14:36:50 (f9be68accb407158ba2b1be2c226a6ce1f649314)
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*/
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/**
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* A base provider for communicating using JSON. This is an abstract class
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* and should not be instanced directly.
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*
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* @abstract
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*/
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Ext.define('Ext.direct.JsonProvider', {
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extend: 'Ext.direct.Provider',
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alias: 'direct.jsonprovider',
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uses: [
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'Ext.direct.ExceptionEvent',
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'Ext.direct.Manager'
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],
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/**
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* Parse the JSON response
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* @private
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*
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* @param {Object} response The XHR response object
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*
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* @return {Object} The data in the response.
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*/
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parseResponse: function(response) {
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if (!Ext.isEmpty(response.responseText)) {
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if (Ext.isObject(response.responseText)) {
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return response.responseText;
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}
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return Ext.decode(response.responseText);
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}
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return null;
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},
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/**
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* Creates a set of events based on the XHR response
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*
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* @param {Object} response The XHR response
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*
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* @return {Ext.direct.Event[]} An array of Ext.direct.Event
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*/
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createEvents: function(response) {
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var me = this,
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data = null,
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events = [],
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event, i, len;
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try {
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data = me.parseResponse(response);
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}
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catch (e) {
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event = new Ext.direct.ExceptionEvent({
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data: e,
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xhr: response,
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code: Ext.direct.Manager.exceptions.PARSE,
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message: 'Error parsing json response: \n\n ' + e
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});
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return [event];
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}
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if (Ext.isArray(data)) {
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for (i = 0, len = data.length; i < len; ++i) {
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events.push(me.createEvent(data[i]));
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}
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}
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else if (Ext.isObject(data)) {
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events.push(me.createEvent(data));
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}
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return events;
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},
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/**
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* Create an event from a response object
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*
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* @param {Object} response Response object
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*
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* @return {Ext.direct.Event} The event
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*/
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createEvent: function(response) {
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if (typeof response !== 'object'|| !('type' in response)) {
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return new Ext.direct.ExceptionEvent({
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data: response,
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code: Ext.direct.Manager.exceptions.DATA,
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message: 'Invalid data: event type is not specified'
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});
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}
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return Ext.create('direct.' + response.type, response);
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}
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});
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