#5 The root Repository class implemented Some first Repository cl…

…asses added.

src/Base/Repository/AbstractRepository.php

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+<?php
+namespace App\Base\Repository;
+
+use App\Base\Entity\AbstractEntity;
+use App\Base\Exceptions\GeneralErrorContextCode;
+use App\Base\Exceptions\GeneralException;
+use App\Base\Selectors\AbstractSelector;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepositoryInterface;
+use Doctrine\Common\Persistence\ObjectRepository;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * The class AbstractRepository is the parent class of all Repository classes
+ * and proveds the basic functionality for the data access.
+ *
+ * @package App\Base\Repository
+ * @author Ilya Khanataev <[email protected]>
+ */
+abstract class AbstractRepository
+{
+
+    /** @var EntityManagerInterface */
+    private $entityManager;
+
+    /**
+     * AbstractRepository constructor.
+     * @param EntityManagerInterface $entityManager
+     */
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        $this->entityManager = $entityManager;
+    }
+
+    /**
+     * @param AbstractSelector $id
+     * @return AbstractEntity
+     * @throws GeneralException
+     */
+    public function find(AbstractSelector $id)
+    {
+        $this->checkSelector($id);
+        return $this->getRepository()->find($id);
+    }
+
+    /**
+     * @return AbstractEntity[]
+     */
+    public function findAll()
+    {
+        return $this->getRepository()->findAll();
+    }
+
+    /**
+     * @return string The FQCN of the Entity class, the repository is responsible for.
+     */
+    abstract public function getEntityClass();
+
+    /**
+     * @return string The FQCN of the Selector for the managed Entity.
+     */
+    abstract public function getEntitySelectorClass();
+
+    /**
+     * @return EntityManagerInterface
+     */
+    protected function getEntityManager(): EntityManagerInterface
+    {
+        return $this->entityManager;
+    }
+
+    /**
+     * @param EntityManagerInterface $entityManager
+     * @return AbstractRepository
+     */
+    protected function setEntityManager(EntityManagerInterface $entityManager): AbstractRepository
+    {
+        $this->entityManager = $entityManager;
+        return $this;
+    }
+
+    /**
+     * @return ServiceEntityRepositoryInterface
+     */
+    protected function getRepository(): ObjectRepository
+    {
+        return $this->entityManager->getRepository($this->getEntityClass());
+    }
+
+    /**
+     * @param AbstractSelector $id
+     * @throws GeneralException
+     */
+    private function checkSelector(AbstractSelector $id): void
+    {
+        $entitySelectorClass = $this->getEntitySelectorClass();
+        if (!($id instanceof $entitySelectorClass)) {
+            throw new GeneralException(null, GeneralErrorContextCode::INVALID_ARGUMENT());
+        }
+    }
+
+}

src/Base/Repository/ChatRepository.php

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+<?php
+namespace App\Base\Repository;
+
+use App\Base\Entity\Chat;
+use App\Base\Selectors\ChatSelector;
+
+class ChatRepository extends AbstractRepository
+{
+
+    /**
+     * @inheritdoc
+     */
+    public function getEntityClass()
+    {
+        return Chat::class;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getEntitySelectorClass()
+    {
+        return ChatSelector::class;
+    }
+
+}

src/Base/Repository/UserRepository.php

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+<?php
+namespace App\Base\Repository;
+
+use App\Base\Entity\User;
+use App\Base\Selectors\UserSelector;
+
+class UserRepository extends AbstractRepository
+{
+
+    /**
+     * @inheritdoc
+     */
+    public function getEntityClass()
+    {
+        return User::class;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getEntitySelectorClass()
+    {
+        return UserSelector::class;
+    }
+
+}