<?php
/**
* Response.php - The Jaxon Response
*
* This class collects commands to be sent back to the browser in response to a jaxon request.
* Commands are encoded and packaged in json format.
*
* Common commands include:
* - <Response->assign>: Assign a value to an element's attribute.
* - <Response->append>: Append a value on to an element's attribute.
* - <Response->script>: Execute a portion of javascript code.
* - <Response->call>: Execute an existing javascript function.
* - <Response->alert>: Display an alert dialog to the user.
*
* Elements are identified by the value of the HTML id attribute.
*
* @package jaxon-core
* @author Jared White
* @author J. Max Wilson
* @author Joseph Woolley
* @author Steffen Konerow
* @author Thierry Feuzeu <thierry.feuzeu@gmail.com>
* @copyright Copyright (c) 2005-2007 by Jared White & J. Max Wilson
* @copyright Copyright (c) 2008-2010 by Joseph Woolley, Steffen Konerow, Jared White & J. Max Wilson
* @copyright 2016 Thierry Feuzeu <thierry.feuzeu@gmail.com>
* @license https://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
* @link https://github.com/jaxon-php/jaxon-core
*/
namespace Jaxon\Response;
class Response extends AbstractResponse
{
use Features\DomCommands;
use Features\JsCommands;
use Features\DomTreeCommands;
/**
* The commands that will be sent to the browser in the response
*
* @var array
*/
protected $aCommands = [];
/**
* A string, array or integer value to be returned to the caller when using 'synchronous' mode requests.
* See <jaxon->setMode> for details.
*
* @var mixed
*/
protected $returnValue;
/**
* Get the content type, which is always set to 'application/json'
*
* @return string
*/
public function getContentType()
{
return 'application/json';
}
/**
* Provides access to registered response plugins
*
* Pass the plugin name as the first argument and the plugin object will be returned.
*
* @param string $sName The name of the plugin
*
* @return null|\Jaxon\Plugin\Response
*/
public function plugin($sName)
{
$xPlugin = jaxon()->di()->getPluginManager()->getResponsePlugin($sName);
if(!$xPlugin)
{
return null;
}
$xPlugin->setResponse($this);
return $xPlugin;
}
/**
* Magic PHP function
*
* Used to permit plugins to be called as if they where native members of the Response instance.
*
* @param string $sPluginName The name of the plugin
*
* @return null|\Jaxon\Plugin\Response
*/
public function __get($sPluginName)
{
return $this->plugin($sPluginName);
}
/**
* Create a JQuery Element with a given selector, and link it to the current response.
*
* This is a shortcut to the JQuery plugin.
*
* @param string $sSelector The jQuery selector
* @param string $sContext A context associated to the selector
*
* @return \Jaxon\Response\Plugin\JQuery\Dom\Element
*/
public function jq($sSelector = '', $sContext = '')
{
return $this->plugin('jquery')->element($sSelector, $sContext);
}
/**
* Create a JQuery Element with a given selector, and link it to the current response.
*
* This is a shortcut to the JQuery plugin.
*
* @param string $sSelector The jQuery selector
* @param string $sContext A context associated to the selector
*
* @return \Jaxon\Response\Plugin\JQuery\Dom\Element
*/
public function jQuery($sSelector = '', $sContext = '')
{
return $this->jq($sSelector, $sContext);
}
/**
* Add a response command to the array of commands that will be sent to the browser
*
* @param array $aAttributes Associative array of attributes that will describe the command
* @param mixed $mData The data to be associated with this command
*
* @return Response
*/
public function addCommand(array $aAttributes, $mData)
{
array_walk($aAttributes, function(&$sAttribute) {
if(!is_integer($sAttribute))
{
$sAttribute = trim((string)$sAttribute, " \t");
}
});
/* merge commands if possible */
if(in_array($aAttributes['cmd'], ['js', 'ap']))
{
if(($aLastCommand = array_pop($this->aCommands)))
{
if($aLastCommand['cmd'] == $aAttributes['cmd'])
{
if($this->getOption('core.response.merge.js') && $aLastCommand['cmd'] == 'js')
{
$mData = $aLastCommand['data'] . '; ' . $mData;
}
elseif($this->getOption('core.response.merge.ap') &&
$aLastCommand['cmd'] == 'ap' &&
$aLastCommand['id'] == $aAttributes['id'] &&
$aLastCommand['prop'] == $aAttributes['prop'])
{
$mData = $aLastCommand['data'] . ' ' . $mData;
}
else
{
$this->aCommands[] = $aLastCommand;
}
}
else
{
$this->aCommands[] = $aLastCommand;
}
}
}
$aAttributes['data'] = $mData;
$this->aCommands[] = $aAttributes;
return $this;
}
/**
* Add a response command to the array of commands that will be sent to the browser
*
* @param string $sName The command name
* @param array $aAttributes Associative array of attributes that will describe the command
* @param mixed $mData The data to be associated with this command
* @param boolean $bRemoveEmpty If true, remove empty attributes
*
* @return Response
*/
protected function _addCommand($sName, array $aAttributes, $mData, $bRemoveEmpty = false)
{
if(is_array($mData))
{
array_walk($mData, function(&$sData) {
$sData = trim((string)$sData, " \t\n");
});
}
else
{
$mData = trim((string)$mData, " \t\n");
}
if($bRemoveEmpty)
{
foreach(array_keys($aAttributes) as $sAttr)
{
if($aAttributes[$sAttr] === '')
{
unset($aAttributes[$sAttr]);
}
}
}
$aAttributes['cmd'] = $sName;
return $this->addCommand($aAttributes, $mData);
}
/**
* Clear all the commands already added to the response
*
* @return Response
*/
public function clearCommands()
{
$this->aCommands = [];
return $this;
}
/**
* Add a response command that is generated by a plugin
*
* @param \Jaxon\Plugin\Response $xPlugin The plugin object
* @param array $aAttributes The attributes for this response command
* @param string $mData The data to be sent with this command
*
* @return Response
*/
public function addPluginCommand($xPlugin, $aAttributes, $mData)
{
$aAttributes['plg'] = $xPlugin->getName();
return $this->addCommand($aAttributes, $mData);
}
/**
* Merge the response commands from the specified <Response> object with
* the response commands in this <Response> object
*
* @param Response|array $mCommands The <Response> object
* @param boolean $bBefore Add the new commands to the beginning of the list
*
* @return void
*/
public function appendResponse($mCommands, $bBefore = false)
{
if($mCommands instanceof Response)
{
$this->returnValue = $mCommands->returnValue;
$aCommands = $mCommands->aCommands;
}
elseif(is_array($mCommands))
{
$aCommands = $mCommands;
}
else
{
throw new \Jaxon\Exception\Error(jaxon_trans('errors.response.data.invalid'));
}
$this->aCommands = ($bBefore) ?
array_merge($aCommands, $this->aCommands) :
array_merge($this->aCommands, $aCommands);
}
/**
* Get the commands in the response
*
* @return array
*/
public function getCommands()
{
return $this->aCommands;
}
/**
* Get the number of commands in the response
*
* @return integer
*/
public function getCommandCount()
{
return count($this->aCommands);
}
/**
* Stores a value that will be passed back as part of the response
*
* When making synchronous requests, the calling javascript can obtain this value
* immediately as the return value of the <jaxon.call> javascript function
*
* @param mixed $value Any value
*
* @return Response
*/
public function setReturnValue($value)
{
$this->returnValue = $value;
return $this;
}
/**
* Return the output, generated from the commands added to the response, that will be sent to the browser
*
* @return string
*/
public function getOutput()
{
$response = [
'jxnobj' => [],
];
if(($this->returnValue))
{
$response['jxnrv'] = $this->returnValue;
}
foreach($this->aCommands as $xCommand)
{
$response['jxnobj'][] = $xCommand;
}
return json_encode($response);
}
}
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