Implemented LazyLoading for RequestedEntity

application/symfony/src/Domain/RequestManagement/Entity/RequestedEntity.php

@@ -1,5 +1,4 @@
 <?php
-
 namespace Infinito\Domain\RequestManagement\Entity;
 
 use Infinito\Entity\AbstractEntity;
@@ -18,9 +17,12 @@ use Infinito\Attribut\ClassAttribut;
 use Infinito\Exception\AllreadyDefinedException;
 use Infinito\Domain\RequestManagement\Right\RequestedRightInterface;
 use Infinito\Domain\RepositoryManagement\LayerRepositoryFactoryService;
+use Infinito\Attribut\SlugAttributInterface;
 
 /**
+ *
  * @author kevinfrantz
+ * @todo Move lazy load to an own child class
  */
 class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
 {
@@ -28,6 +30,12 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     RequestedRightAttribut,
     ClassAttribut{ setClass as private setClassTrait; getClass as private getClassTrait; }
 
+    /**
+     *
+     * @var EntityInterface|NULL Important for lazy loading
+     */
+    private static $lazyLoadedEntity;
+
     /**
      * BE AWARE:
      * This attribut can lead to sideeffects, because it can be defined, or NULL.
@@ -37,28 +45,44 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     private $layerRepositoryFactoryService;
 
     /**
+     *
      * @throws NotSetException
      */
     private function validateHasIdentity(): void
     {
-        if (!($this->hasId() || $this->hasSlug())) {
+        if (! ($this->hasId() || $this->hasSlug())) {
             throw new NotSetException('No identity attribut like id or slug was set!');
         }
     }
 
     /**
+     *
      * @param EntityInterface|null $entity
      *
      * @throws NotFoundHttpException
      */
     private function validateLoadedEntity(?EntityInterface $entity): void
     {
-        if (!$entity) {
-            throw new NotFoundHttpException('Entity with {id:"'.$this->id.'",slug:"'.$this->slug.'"} not found');
+        if (! $entity) {
+            throw new NotFoundHttpException('Entity with {id:"' . $this->id . '",slug:"' . $this->slug . '"} not found');
         }
     }
 
     /**
+     *
+     * @return EntityInterface The lazy loaded entity
+     */
+    private function lazyLoadEntity(): ?EntityInterface
+    {
+        if ($this->isLazyLoadNeccessary()) {
+            $entity = $this->loadEntityBySlugOrId();
+            self::$lazyLoadedEntity = $entity;
+        }
+        return self::$lazyLoadedEntity;
+    }
+
+    /**
+     *
      * @return EntityInterface|SourceInterface|null
      */
     private function loadEntityBySlugOrId(): ?EntityInterface
@@ -71,6 +95,26 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
+     * @return bool True if a reload is neccessary
+     */
+    private function isLazyLoadNeccessary(): bool
+    {
+        if (self::$lazyLoadedEntity) {
+            if ($this->hasId()) {
+                return $this->id !== self::$lazyLoadedEntity->getId();
+            }
+            if ($this->hasSlug()) {
+                if (self::$lazyLoadedEntity instanceof SlugAttributInterface) {
+                    return $this->slug !== self::$lazyLoadedEntity->getSlug();
+                }
+            }
+        }
+        return true;
+    }
+
+    /**
+     *
      * @throws NotCorrectInstanceException
      *
      * @return SourceInterface|null
@@ -81,10 +125,11 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
         if ($repository instanceof SourceRepositoryInterface) {
             return $repository->findOneBySlug($this->slug);
         }
-        throw new NotCorrectInstanceException('To read an entity by slug is just allowed for entitys of type '.AbstractSource::class);
+        throw new NotCorrectInstanceException('To read an entity by slug is just allowed for entitys of type ' . AbstractSource::class);
     }
 
     /**
+     *
      * @return EntityInterface|null
      */
     private function loadById(): ?EntityInterface
@@ -95,16 +140,18 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * @throws NotFoundHttpException
      */
     private function validateLayerRepositoryFactoryService(): void
     {
-        if (!$this->layerRepositoryFactoryService) {
-            throw new NotSetException('The operation is not possible, because the class '.LayerRepositoryFactoryService::class.' is not injected!');
+        if (! $this->layerRepositoryFactoryService) {
+            throw new NotSetException('The operation is not possible, because the class ' . LayerRepositoryFactoryService::class . ' is not injected!');
         }
     }
 
     /**
+     *
      * @return RepositoryInterface
      */
     private function getEntityRepository(): RepositoryInterface
@@ -117,6 +164,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * @param LayerRepositoryFactoryServiceInterface|null $layerRepositoryFactoryService
      */
     public function __construct(?LayerRepositoryFactoryServiceInterface $layerRepositoryFactoryService = null)
@@ -125,6 +173,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * {@inheritdoc}
      *
      * @see \Infinito\Domain\RequestManagement\Entity\RequestedEntityInterface::hasIdentity()
@@ -135,6 +184,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * {@inheritdoc}
      *
      * @see \Infinito\Domain\RequestManagement\Entity\RequestedEntityInterface::setIdentity()
@@ -155,6 +205,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * {@inheritdoc}
      *
      * @see \Infinito\Attribut\ClassAttributInterface::setClass()
@@ -168,6 +219,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     }
 
     /**
+     *
      * {@inheritdoc}
      *
      * @see \Infinito\Domain\RequestManagement\Entity\RequestedEntityInterface::getEntity()
@@ -176,6 +228,7 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     {
         $this->validateHasIdentity();
         $entity = $this->loadEntityBySlugOrId();
+        //$entity = $this->lazyLoadEntity();
         $this->validateLoadedEntity($entity);
 
         return $entity;
@@ -191,12 +244,13 @@ class RequestedEntity extends AbstractEntity implements RequestedEntityInterface
     public function setRequestedRight(RequestedRightInterface $requestedRight): void
     {
         $this->requestedRight = $requestedRight;
-        if (!$this->requestedRight->hasRequestedEntity()) {
+        if (! $this->requestedRight->hasRequestedEntity()) {
             $this->requestedRight->setRequestedEntity($this);
         }
     }
 
     /**
+     *
      * {@inheritdoc}
      *
      * @see \Infinito\Attribut\ClassAttributInterface::getClass()