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<?php |
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/** |
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* |
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* © 2015 Tolan Blundell. All rights reserved. |
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* <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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*/ |
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namespace PatternSeek\DependencyInjector; |
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use Pimple\Container; |
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use ReflectionException; |
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/** |
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* Inject dependencies into a class method from a Pimple container |
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* Dependency objects in Pimple must be named after the dependency FQCN |
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* |
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*/ |
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class DependencyInjector |
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{ |
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/** |
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* @var DependencyInjector |
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*/ |
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private static $singleton; |
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/** |
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* @var Container |
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*/ |
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private $container; |
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/** |
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* @param Container $container |
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*/ |
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private function __construct( Container $container ){ |
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$this->container = $container; |
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} |
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/** |
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* @return DependencyInjector |
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* @throws \Exception |
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*/ |
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public static function instance(){ |
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if( ! isset( self::$singleton->container ) ){ |
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throw new \Exception( "Can't access DependencyInjector singleton before it is initialised via DependencyInjector::init()" ); |
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} |
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return self::$singleton; |
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} |
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/** |
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* @param Container $container |
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*/ |
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public static function init( Container $container ){ |
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$di = new DependencyInjector( $container ); |
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self::$singleton = $di; |
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} |
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/** |
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* Inject dependencies from, or including, the Pimple container, into a given method on a given object |
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* @param $object |
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* @param $methodName |
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* @return mixed The method's return value |
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*/ |
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View Code Duplication |
public function injectIntoMethod( $object, $methodName = "injectDependencies" ){ |
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$ref = new \ReflectionClass($object); |
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try{ |
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$refMethod = $ref->getMethod( $methodName ); |
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}catch( ReflectionException $e ){ |
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return null; |
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} |
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$toInject = []; |
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foreach ($refMethod->getParameters() as $p) { |
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$className = $p->getClass()->name; |
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if( $className === "Pimple\\Container" ){ |
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$toInject[] = $this->container; |
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}else{ |
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$toInject[] = $this->container[ $className ]; |
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} |
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} |
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return $refMethod->invoke( $object, ... $toInject ); |
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} |
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/** |
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* Inject dependencies from, or including, the Pimple container, into a a given class's constructor |
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* Optionally providing a number of arguments to the constructor to prepend. |
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* |
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* @param string $classToBuildName |
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* @param array $toInject |
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* @return bool Whether the method was found |
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*/ |
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View Code Duplication |
public function injectIntoConstructor( $classToBuildName, array $toInject=[] ){ |
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$ref = new \ReflectionClass($classToBuildName); |
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try{ |
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$constr = $ref->getConstructor(); |
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}catch( ReflectionException $e ){ |
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return null; |
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} |
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$numToSkip = count($toInject); |
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foreach ($constr->getParameters() as $p) { |
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if( $numToSkip > 0 ){ |
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$numToSkip--; |
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continue; |
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} |
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$classToInjectName = $p->getClass()->name; |
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if( $classToInjectName === "Pimple\\Container" ){ |
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$toInject[] = $this->container; |
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}else{ |
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$toInject[] = $this->container[ $classToInjectName ]; |
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} |
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} |
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return new $classToBuildName( ... $toInject ); |
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} |
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} |
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