<?php
/**
* CallableClass.php - Jaxon callable class plugin
*
* This class registers user defined callable classes, generates client side javascript code,
* and calls their methods on user request
*
* @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\Request\Plugin;
use Jaxon\Jaxon;
use Jaxon\CallableClass as UserCallableClass;
use Jaxon\Plugin\Request as RequestPlugin;
use Jaxon\Request\Support\CallableObject;
use Jaxon\Request\Support\CallableRegistry;
use Jaxon\Request\Support\CallableRepository;
use Jaxon\Request\Target;
class CallableClass extends RequestPlugin
{
use \Jaxon\Features\Config;
use \Jaxon\Features\Template;
use \Jaxon\Features\Validator;
use \Jaxon\Features\Translator;
/**
* The callable registrar
*
* @var CallableRegistry
*/
protected $xRegistry;
/**
* The callable repository
*
* @var CallableRepository
*/
protected $xRepository;
/**
* The value of the class parameter of the incoming Jaxon request
*
* @var string
*/
protected $sRequestedClass = '';
/**
* The value of the method parameter of the incoming Jaxon request
*
* @var string
*/
protected $sRequestedMethod = '';
/**
* The class constructor
*
* @param CallableRegistry $xRegistry The callable class registry
* @param CallableRepository $xRepository The callable object repository
*/
public function __construct(CallableRegistry $xRegistry, CallableRepository $xRepository)
{
$this->xRegistry = $xRegistry;
$this->xRepository = $xRepository;
if(!empty($_GET['jxncls']))
{
$this->sRequestedClass = trim($_GET['jxncls']);
}
if(!empty($_GET['jxnmthd']))
{
$this->sRequestedMethod = trim($_GET['jxnmthd']);
}
if(!empty($_POST['jxncls']))
{
$this->sRequestedClass = trim($_POST['jxncls']);
}
if(!empty($_POST['jxnmthd']))
{
$this->sRequestedMethod = trim($_POST['jxnmthd']);
}
}
/**
* @inheritDoc
*/
public function getName()
{
return Jaxon::CALLABLE_CLASS;
}
/**
* @inheritDoc
*/
public function getTarget()
{
if(!$this->sRequestedClass || !$this->sRequestedMethod)
{
return null;
}
return Target::makeClass($this->sRequestedClass, $this->sRequestedMethod);
}
/**
* Register a callable class
*
* @param string $sType The type of request handler being registered
* @param string $sClassName The name of the class being registered
* @param array|string $aOptions The associated options
*
* @return boolean
*/
public function register($sType, $sClassName, $aOptions)
{
$sType = trim($sType);
if($sType != $this->getName())
{
return false;
}
if(!is_string($sClassName))
{
throw new \Jaxon\Exception\Error($this->trans('errors.objects.invalid-declaration'));
}
if(is_string($aOptions))
{
$aOptions = ['include' => $aOptions];
}
if(!is_array($aOptions))
{
throw new \Jaxon\Exception\Error($this->trans('errors.objects.invalid-declaration'));
}
$this->xRepository->addClass(trim($sClassName), $aOptions);
return true;
}
/**
* @inheritDoc
*/
public function getHash()
{
$this->xRegistry->createCallableClasses();
$aNamespaces = $this->xRepository->getNamespaces();
$aClasses = $this->xRepository->getClasses();
$sHash = '';
foreach($aNamespaces as $sNamespace => $aOptions)
{
$sHash .= $sNamespace . $aOptions['separator'];
}
foreach($aClasses as $sClassName => $aOptions)
{
$sHash .= $sClassName . $aOptions['timestamp'];
}
return md5($sHash);
}
/**
* Generate client side javascript code for namespaces
*
* @return string
*/
private function getNamespacesScript()
{
$sCode = '';
$sPrefix = $this->getOption('core.prefix.class');
$aJsClasses = [];
$aNamespaces = array_keys($this->xRepository->getNamespaces());
foreach($aNamespaces as $sNamespace)
{
$offset = 0;
$sJsNamespace = str_replace('\\', '.', $sNamespace);
$sJsNamespace .= '.Null'; // This is a sentinel. The last token is not processed in the while loop.
while(($dotPosition = strpos($sJsNamespace, '.', $offset)) !== false)
{
$sJsClass = substr($sJsNamespace, 0, $dotPosition);
// Generate code for this object
if(!key_exists($sJsClass, $aJsClasses))
{
$sCode .= "$sPrefix$sJsClass = {};\n";
$aJsClasses[$sJsClass] = $sJsClass;
}
$offset = $dotPosition + 1;
}
}
return $sCode;
}
/**
* Generate client side javascript code for a callable class
*
* @param string $sClassName The class name
* @param CallableObject $xCallableObject The corresponding callable object
* @param array $aProtectedMethods The protected methods
*
* @return string
*/
private function getCallableScript($sClassName, CallableObject $xCallableObject, array $aProtectedMethods)
{
$aCallableOptions = $this->xRepository->getCallableOptions();
$aConfig = $aCallableOptions[$sClassName];
$aCommonConfig = key_exists('*', $aConfig) ? $aConfig['*'] : [];
$_aProtectedMethods = is_subclass_of($sClassName, UserCallableClass::class) ? $aProtectedMethods : [];
$aMethods = [];
foreach($xCallableObject->getMethods() as $sMethodName)
{
// Don't export methods of the CallableClass class
if(in_array($sMethodName, $_aProtectedMethods))
{
continue;
}
// Specific options for this method
$aMethodConfig = key_exists($sMethodName, $aConfig) ?
array_merge($aCommonConfig, $aConfig[$sMethodName]) : $aCommonConfig;
$aMethods[] = [
'name' => $sMethodName,
'config' => $aMethodConfig,
];
}
$sPrefix = $this->getOption('core.prefix.class');
return $this->render('jaxon::support/object.js', [
'sPrefix' => $sPrefix,
'sClass' => $xCallableObject->getJsName(),
'aMethods' => $aMethods,
]);
}
/**
* Generate client side javascript code for the registered callable objects
*
* @return string
*/
public function getScript()
{
$this->xRegistry->createCallableObjects();
// The methods of the \Jaxon\CallableClass class must not be exported
$xCallableClass = new \ReflectionClass(UserCallableClass::class);
$aProtectedMethods = [];
foreach($xCallableClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $xMethod)
{
$aProtectedMethods[] = $xMethod->getName();
}
$sCode = $this->getNamespacesScript();
$aCallableObjects = $this->xRepository->getCallableObjects();
foreach($aCallableObjects as $sClassName => $xCallableObject)
{
$sCode .= $this->getCallableScript($sClassName, $xCallableObject, $aProtectedMethods);
}
return $sCode;
}
/**
* @inheritDoc
*/
public function canProcessRequest()
{
// Check the validity of the class name
if(($this->sRequestedClass !== null && !$this->validateClass($this->sRequestedClass)) ||
($this->sRequestedMethod !== null && !$this->validateMethod($this->sRequestedMethod)))
{
$this->sRequestedClass = null;
$this->sRequestedMethod = null;
}
return ($this->sRequestedClass !== null && $this->sRequestedMethod !== null);
}
/**
* @inheritDoc
*/
public function processRequest()
{
if(!$this->canProcessRequest())
{
return false;
}
// Find the requested method
$xCallableObject = $this->xRegistry->getCallableObject($this->sRequestedClass);
if(!$xCallableObject || !$xCallableObject->hasMethod($this->sRequestedMethod))
{
// Unable to find the requested object or method
throw new \Jaxon\Exception\Error($this->trans('errors.objects.invalid',
['class' => $this->sRequestedClass, 'method' => $this->sRequestedMethod]));
}
// Call the requested method
$di = jaxon()->di();
$aArgs = $di->getRequestHandler()->processArguments();
$xResponse = $xCallableObject->call($this->sRequestedMethod, $aArgs);
if(($xResponse))
{
$di->getResponseManager()->append($xResponse);
}
return true;
}
}
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