oxutilsobject.php

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<?php

class oxUtilsObject extends oxSuperCfg
{
    protected $_aClassNameCache = array();

    protected static $_aLoadedArticles = array();

    protected static $_aInstanceCache = array();

    private static $_instance = null;

    public static function getInstance()
    {
        // disable caching for test modules
        if ( defined( 'OXID_PHP_UNIT' ) ) {
            static $inst = array();
            self::$_instance = $inst[oxClassCacheKey()];
        }

        if ( !self::$_instance instanceof oxUtilsObject ) {

            // allow modules
            $oUtilsObject = new oxUtilsObject();
            self::$_instance = $oUtilsObject->oxNew( 'oxUtilsObject' );

            if ( defined( 'OXID_PHP_UNIT' ) ) {
                $inst[oxClassCacheKey()] = self::$_instance;
            }
        }
        return self::$_instance;
    }

    public function oxNew( $sClassName, $sParams = null )
    {

        $sClassName = strtolower( $sClassName );
        $sCacheKey  = ($sParams !== null )?$sClassName.md5( serialize( $sParams ) ):$sClassName;

        if ( !defined( 'OXID_PHP_UNIT' ) ) {
            if ( isset( self::$_aInstanceCache[$sCacheKey] ) ) {
                return clone self::$_aInstanceCache[$sCacheKey];
            }
        }

        // performance
        if ( isset( $this->_aClassNameCache[$sClassName] ) ) {
            $sActionClassName = $this->_aClassNameCache[$sClassName];
        } else {
            $sActionClassName = $this->getClassName( $sClassName );
            //expect __autoload() (oxfunctions.php) to do its job when class_exists() is called
            if ( !class_exists( $sActionClassName ) ) {
                $oEx = new oxSystemComponentException();
                $oEx->setMessage('EXCEPTION_SYSTEMCOMPONENT_CLASSNOTFOUND');
                $oEx->setComponent($sClassName);
                $oEx->debugOut();
                throw $oEx;
            }
            // performance
            $this->_aClassNameCache[$sClassName] = $sActionClassName;
        }

        if ( $sParams ) {
            $oActionObject = new $sActionClassName( $sParams );
        } else {
            $oActionObject = new $sActionClassName();
        }

        if ( $oActionObject instanceof oxBase ) {
            self::$_aInstanceCache[$sCacheKey] = clone $oActionObject;
        }

        return $oActionObject;
    }

    public function oxNewArticle( $sOxID, $aProperties = array())
    {
        if ( $sOxID && isset( self::$_aLoadedArticles[$sOxID] ) ) {
            return self::$_aLoadedArticles[$sOxID];
        }

        $oActionObject = $this->oxNew( 'oxarticle' );

        // adding object prioperties
        foreach ( $aProperties as $sPropertyName => $sPropertyVal ) {
            $oActionObject->$sPropertyName = $sPropertyVal;
        }

        $oActionObject->load( $sOxID );

        self::$_aLoadedArticles[$sOxID] = $oActionObject;
        return $oActionObject;
    }

    public function resetInstanceCache($sClassName = null)
    {
        if ($sClassName && isset(self::$_aInstanceCache[$sClassName])) {
            unset(self::$_aInstanceCache[$sClassName]);
            return;
        }

        //looping due to possible memory "leak".
        if (is_array(self::$_aInstanceCache)) {
            foreach (self::$_aInstanceCache as $sKey => $oInstance) {
                unset(self::$_aInstanceCache[$sKey]);
            }
        }

        self::$_aInstanceCache = array();
    }

    public function generateUId()
    {
        return substr( $this->getSession()->getId(), 0, 3 ) . substr( md5( uniqid( '', true ).'|'.microtime() ), 0, 29 );
    }


    public function getClassName( $sClassName )
    {
        $aModules = $this->getConfig()->getConfigParam( 'aModules' );
        if ( is_array( $aModules ) && array_key_exists( $sClassName, $aModules ) ) {
            //multiple inheritance implementation
            //in case we have multiple modules:
            //like oxoutput => sub/suboutput1&sub/suboutput2&sub/suboutput3
            $aClassChain = explode( "&", $aModules[$sClassName] );

            $sParent = $sClassName;

            //security: just preventing string termination
            $sParent = str_replace(chr(0), '', $sParent);

            //building middle classes if needed
            $sClassName = $this->_makeSafeModuleClassParents( $aClassChain, $sParent );
        }

        // check if there is a path, if yes, remove it
        $sClassName = basename( $sClassName );

        return $sClassName;
    }

    public function isModuleActive( $sClassName, $sModuleName )
    {
        $aModules = $this->getConfig()->getConfigParam( 'aModules' );
        if ( is_array( $aModules ) && array_key_exists( $sClassName, $aModules ) ) {
            $aClassChain = explode( "&", $aModules[$sClassName] );
            foreach ($aClassChain as $sModule) {
                if ( basename($sModule) == $sModuleName ) {
                    return true;
                }
            }
        }
        return false;
    }

    private function _makeSafeModuleClassParents( $aClassChain, $sBaseModule )
    {
        $myConfig = $this->getConfig();
        $sParent = $sBaseModule;

        //building middle classes if needed
        foreach ($aClassChain as $sModule) {
            //creating middle classes
            //e.g. class suboutput1_parent extends oxoutput {}
            //     class suboutput2_parent extends suboutput1 {}
            //$sModuleClass = $this->getClassName($sModule);

            //security: just preventing string termination
            $sModule = str_replace(chr(0), '', $sModule);

            //get parent and module class names from sub/suboutput2
            $sParentClass = basename($sParent);
            $sModuleClass = basename($sModule);

            //P
            //$sInitClass = "class ".$sModuleClass."_parent extends $sParentClass { function ".$sModuleClass."_parent(){ return ".$sParentClass."::".$sParentClass."();} }";
            $sInitClass = "class ".$sModuleClass."_parent extends $sParentClass {}";

            //initializing middle class
            if (!class_exists($sModuleClass."_parent", false)) {
                eval($sInitClass);
            }
            $sParentPath = $myConfig->getConfigParam( 'sShopDir' )."/modules/".$sModule.".php";

            //including original file
            if ( file_exists( $sParentPath ) ) {
                require_once $sParentPath;
            } elseif ( !class_exists( $sModuleClass ) ) { //to avoid problems with unitest and only throw a exception if class does not exists MAFI
                $oEx = new oxSystemComponentException();
                $oEx->setMessage('EXCEPTION_SYSTEMCOMPONENT_CLASSNOTFOUND');
                $oEx->setComponent($sModule);
            }

            $sParent = $sModule;
        }

        //returning the last module from the chain
        $sClassName = $aClassChain[count($aClassChain) - 1];
        return $sClassName;
    }
}

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