at the end of the day, it was inevitable

2022-12-09 08:36:26 -06:00
commit 1218570914
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+<?php
+
+namespace Common\Util\Processor\ExpressionLanguage\Provider;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Mapping\ClassMetadataInfo;
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+
+/**
+ * Class EntityGetterProvider
+ * Register function like 'getUser' or 'getStoredQuery' for fetching single
+ * entity from database.
+ *
+ * @package Common\Util\Processor\ExpressionLanguage\Provider
+ *
+ */
+class EntityGetterProvider implements ExpressionFunctionProviderInterface
+{
+
+    /**
+     * @var EntityManagerInterface
+     */
+    private $em;
+
+    /**
+     * EntityGetterProvider constructor.
+     *
+     * @param EntityManagerInterface $em A EntityManagerInterface instance.
+     */
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    /**
+     * @return ExpressionFunction[] An array of Function instances.
+     */
+    public function getFunctions()
+    {
+        /**
+         * Dummy compiler.
+         * We use this expression function only in runtime and not compile its.
+         */
+        $compiler = function () {
+        };
+
+        $functions = [];
+        /** @var ClassMetadataInfo[] $metadataList */
+        $metadataList = $this->em->getMetadataFactory()->getAllMetadata();
+        foreach ($metadataList as $metadata) {
+            $name = $metadata->getName();
+            $shortName = substr($name, strrpos($name, '\\') + 1);
+            $fnName = 'get'. $shortName;
+
+            if (strpos($name, 'Entity\\'. $shortName) === false) {
+                // Process only entities inside 'Entity' directory.
+                continue;
+            }
+
+            /**
+             * @param mixed $arguments Arguments specified by expression language
+             * @param array $criteria  Search criteria.
+             *
+             * @return null|object Found entity or null.
+             */
+            $evaluator = function ($arguments, array $criteria) use ($name) {
+                return $this->em->getRepository($name)->findOneBy($criteria);
+            };
+            $functions[] = new ExpressionFunction($fnName, $compiler, $evaluator);
+        }
+
+        return $functions;
+    }
+}