Zend FR

<?php
/**
 * Tight_Di - Contains all dependencies references
 *  
 * @category Tight
 * @package Tight_Di
 * @author Benjamin Dulau
 */
class Tight_Di 
{
    
    /**
     * Array of instances     
     * @var array
     */
    protected $_instances = array();
    
    /**
     * Array of registered dependencies     
     * @var array
     */
    protected $_components = array();

    /**     
     * @var Tight_Aop
     */
    protected $_aop;
    
    
    /**
     * Constructor - calls load method for each file
     * 
     * @param array $componentFiles
     * @return void
     */
    public function __construct(array $componentFiles = array())
    {
        foreach($componentFiles as $file) {
            $this->load($file);
        }
    }

    /**
     * Loads file and builds components definitions
     * 
     * @param string $componentFile
     * @return bool success
     * @throws Tight_Di_Exception if unable to load file as XML
     */
    public function load($componentFile)
    {        
        if (false === file_exists($componentFile) || false === is_file($componentFile)) {
            Throw new Tight_Di_Exception(Tight_Di_Exception::NO_SUCH_FILE . ': ' . $componentFile);
            return false;                
        } 
        
        $xml = null;
        if (false === ($xml = simplexml_load_file($componentFile))) {
            Throw new Tight_Di_Exception(Tight_Di_Exception::FILE_LOAD_FAILED . ': ' . $componentFile);
            return false;            
        };    

        // components
        foreach ($xml->component as $XMLElement) {
            $component = array();
        
            // id
            $id = (string)$XMLElement->attributes()->id;
            $component['class'] = (string)$XMLElement->attributes()->class;

            // dependencies
            $component['dependencies'] = array();
            foreach($XMLElement->property as $property) { 
                $name = (string)$property->attributes()->name;
                $refComponent = (string)$property->attributes()->ref;
                                
                $component['dependencies'][$name] = $refComponent;                                             
            }
            
            $this->addComponent($id, $component);
        }
        
        // aop : experimental
//        foreach ($xml->aop as $XMLElement) {
//            if (null === $this->_aop) {
//                $this->setAop(new Tight_Aop());
//            }
//            $this->getAop()->addConfig($XMLElement);
//        }
//        
//        if ($this->getAop()->classMatchExpression($class)) {
//            $instance = $this->getAop()->getClassInstance($class);
//        }
//        else {
//            $instance = new $class();   
//        }
        
        return true;
    }
    
    /**     
     * @param Tight_Aop $aop
     * @return Tight_Di
     */
    public function setAop(Tight_Aop $aop)
    {
        $this->_aop = $aop;
        return $this;
    }
    
    /**     
     * @return Tight_Aop
     */
    public function getAop()
    {
        return $this->_aop;
    }

    /**
     * Adds a dependency reference to container     
     *
     * @param  array $dependency config array for provided dependency     
     * @return Tight_Di
     */
    public function addComponent($key, array $component) {                
        $this->_components[$key] = $component;
        return $this;        
    }
    
    /**
     * Returns component definition
     * 
     * @param string $key
     * @return array
     */
    public function getComponent($key) {        
        return $this->_components[$key];        
    }
    
    /**
     * Returns all components definitions array
     * 
     * @return array
     */
    public function getComponents()
    {
        return $this->_components;
    }
    
    /**
     * Retrieves component instance.
     * Creates instance if none exists yet
     * 
     * @param $key
     * @return mixed
     */
    public function getInstance($key)
    {
        $component = $this->getComponent($key);
        if (false === array_key_exists($key, $this->_instances)) {
            $this->_instances[$key] = new $component['class']();            
        }
        
        return $this->_instances[$key];
    }
    
    /**
     * Injects recursively dependencies starting by $key
     *  
     * @param $key
     * @param $target
     * @return void
     */
    public function inject($key, $target)
    {        
        $component = $this->getComponent($key); 
        foreach($component['dependencies'] as $property => $ref) {
            $var = '_' . $property;
            $setter = 'set' . ucfirst($property);
            
            $instance = $this->getInstance($ref);        
            $target->$setter($instance);
            
            // recursive injection for dependency dependencies
            $this->inject($ref, $instance);
        }
    }
    
    /**
     * Sets directly an instance into instances.
     * Used by Zend_Application on resource plugin return.     
     *
     * @param string $key
     * @param mixed $instance
     * @return Tight_Di
     */
    public function __set($key, $instance)
    {
        /*$component = array();                               
        $component['class'] = get_class($instance);        
        
        // dependencies
        $component['dependencies'] = array();                        
        $this->addComponent($key, $component);*/

        $this->_instances[$key] = $instance;
        
        return $this;    
    }

    /**
     * Gets the given instance
     * Used by Zend_Application on getInvokArg()
     *
     * @param string $key
     * @return mixed instance
     */
    public function __get($key)
    {        
        return $this->getInstance($key);
    }
    
    /**
     * Tests if an object exists into instances
     * Used by Zend_Application
     *
     * @param string $key
     * @return bool
     */
    public function __isset($key)
    {        
        return array_key_exists($key, $this->_instances);
    }
}

try {
    $container = new Tight_Di(array(
        APPLICATION_PATH . '/../etc/ioc/resources.xml',
        APPLICATION_PATH . '/../etc/ioc/controllers.xml',
        APPLICATION_PATH . '/../etc/ioc/services.xml',        
        APPLICATION_PATH . '/../etc/ioc/daos.xml'
    ));
    
    $application->getBootstrap()->setContainer($container);
    $application->bootstrap()
                     ->run();
}
catch (Exception $e) {
    exit($e->getCode() . ': ' . $e->getMessage());
}

<!-- resources.xml -->
<components>
    <component id="doctrine" class="Doctrine_Manager" />        
    <component id="exception" class="Zend_Exception" />
    <component id="modules" class="" />
    <component id="exception" class="Zend_Exception" />
    <component id="Navigation" class="Zend_Navigation" />
    <component id="Routeur" class="Zend_Router" />
    <component id="frontcontroller" class="Zend_Controller_Front" />
    <component id="layout" class="Zend_Layout" />
    <component id="view" class="Tight_View" />
    <component id="locale" class="Zend_Locale" />
    <component id="translate" class="Zend_Translate" />
    <component id="session" class="Zend_Session" />
    <component id="config" class="Zend_Config" />            
    <component id="acl" class="App_Acl" />
    <component id="auth" class="App_AuthImpl">
        <property name="userRepository" ref="userRepository" />
        <property name="accountAssembler" ref="accountAssembler" />    
    </component>
    <component id="imagemanager" class="App_ImageManager" />
    <component id="mailer" class="Tight_Mail" />                
</components>

<!-- controllers.xml -->
<components>
    <!-- Front module -->
    <component id="authController" class="Front_AuthController">
        <property name="auth" ref="auth" />
        <property name="accountService" ref="accountService" />
    </component>
    <component id="accountsController" class="Front_AccountsController">
        <property name="auth" ref="auth" />                
        <property name="accountService" ref="accountService" />
        <property name="mailer" ref="appmailer" />
    </component>
    <component id="galleriesController" class="Front_GalleriesController">                
        <property name="auth" ref="auth" />
        <property name="galleryService" ref="galleryService" />
        <property name="imageManager" ref="imagemanager" />            
    </component>
    <component id="photosController" class="Front_PhotosController">                
        <property name="auth" ref="auth" />
        <property name="photoService" ref="photoService" />                
    </component>
    
    <component id="appmailer" class="App_Mailer">
        <property name="mailer" ref="mailer" />
        <property name="translator" ref="translate" />
    </component>
</components>

<!-- services.xml -->
<components>    
    <component id="accountService" class="Service_Impl_Account">
        <property name="auth" ref="auth" />
        <property name="userRepository" ref="userRepository" />
        <property name="accountValidator" ref="accountValidator" />
        <property name="accountAssembler" ref="accountAssembler" />
        <property name="accountDetailsAssembler" ref="accountDetailsAssembler" />
        <property name="authValidator" ref="authValidator" />
        <property name="mailService" ref="mailService" />
        <property name="recoverValidator" ref="recoverValidator" />
        <property name="editAccountValidator" ref="editAccountValidator" />
        <property name="accountDetailsValidator" ref="accountDetailsValidator" />
    </component>
    <component id="galleryService" class="Service_Impl_Gallery">        
        <property name="auth" ref="auth" />
        <property name="userRepository" ref="userRepository" />
        <property name="galleryRepository" ref="galleryRepository" />
        <property name="photoRepository" ref="photoRepository" />
        <property name="galleryAssembler" ref="galleryAssembler" />
        <property name="photoAssembler" ref="photoAssembler" />
        <property name="galleryValidator" ref="galleryValidator" />
        <property name="photoValidator" ref="photoValidator" />
        <property name="imageManager" ref="imagemanager" />
        <property name="commentAssembler" ref="commentAssembler" />
        <property name="commentValidator" ref="commentValidator" />
        <!-- <property name="galleryValidator" ref="galleryValidator" /> -->
    </component>
    <component id="photoService" class="Service_Impl_Photo">
        <property name="auth" ref="auth" />
        <property name="photoRepository" ref="photoRepository" />
        <property name="photoAssembler" ref="photoAssembler" />
        <property name="commentAssembler" ref="commentAssembler" />
        <property name="commentValidator" ref="commentValidator" />
    </component>
    <component id="mailService" class="Service_Impl_Mail">
        <property name="mailer" ref="mailer" />
    </component>
    <!-- validators -->
    <component id="accountValidator" class="Service_Validator_Account">
        <property name="userRepository" ref="userRepository" />     
    </component>
    <component id="authValidator" class="Service_Validator_Auth" />
    <component id="accountAssembler" class="Assembler_Account" />
    <component id="accountDetailsAssembler" class="Assembler_AccountDetails" />
    <component id="accountDetailsValidator" class="Service_Validator_AccountDetails" />
    <component id="galleryAssembler" class="Assembler_Gallery" />
    <component id="photoAssembler" class="Assembler_Photo" />
    <component id="galleryValidator" class="Service_Validator_Gallery" />
    <component id="photoValidator" class="Service_Validator_Photo" />
    <component id="commentAssembler" class="Assembler_Comment" />
    <component id="commentValidator" class="Service_Validator_Comment">
        <property name="userRepository" ref="userRepository" />
    </component>        
    <component id="recoverValidator" class="Service_Validator_RecoverPassword" />
    <component id="editAccountValidator" class="Service_Validator_EditAccount" >
        <property name="userRepository" ref="userRepository" /> 
    </component>
</components>

<!-- daos.xml -->
<components>
    <component id="userRepository" class="DAO_User" />    
    <component id="galleryRepository" class="DAO_Gallery" />
    <component id="photoRepository" class="DAO_Photo" />    
</components>