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src/Validator/Constraints/AssemblySystem/AssemblyInvalidBomEntryValidator.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Validator\Constraints\AssemblySystem;
+
+use App\Entity\AssemblySystem\Assembly;
+use Symfony\Component\Form\Form;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Violation\ConstraintViolationBuilder;
+use ReflectionClass;
+
+/**
+ * Validator to check that no child assemblies are referenced in BOM entries.
+ */
+class AssemblyInvalidBomEntryValidator extends ConstraintValidator
+{
+    public function validate($value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof AssemblyInvalidBomEntry) {
+            throw new UnexpectedTypeException($constraint, AssemblyInvalidBomEntry::class);
+        }
+
+        if (!$value instanceof Assembly) {
+            return;
+        }
+
+        $availableViolations = $this->context->getViolations();
+        if (count($availableViolations) > 0) {
+            //already violations given, currently no more needed to check
+
+            return;
+        }
+
+        $bomEntries = [];
+
+        if ($this->context->getRoot() instanceof Form && $this->context->getRoot()->has('bom_entries')) {
+            $bomEntries = $this->context->getRoot()->get('bom_entries')->getData();
+            $bomEntries = is_array($bomEntries) ? $bomEntries : iterator_to_array($bomEntries);
+        } elseif ($this->context->getRoot() instanceof Assembly) {
+            $bomEntries = $value->getBomEntries()->toArray();
+        }
+
+        $relevantEntries = [];
+
+        foreach ($bomEntries as $bomEntry) {
+            if ($bomEntry->getReferencedAssembly() !== null) {
+                $relevantEntries[$bomEntry->getId()] = $bomEntry;
+            }
+        }
+
+        foreach ($relevantEntries as $bomEntry) {
+            $referencedAssembly = $bomEntry->getReferencedAssembly();
+
+            if ($bomEntry->getAssembly()->getParent()?->getId() === $referencedAssembly->getParent()?->getId()) {
+                //Save on the same assembly level
+                continue;
+            } elseif ($this->isInvalidBomEntry($referencedAssembly, $bomEntry->getAssembly())) {
+                $this->addViolation($value, $constraint);
+            }
+        }
+    }
+
+    /**
+     * Determines whether a Bill of Materials (BOM) entry is invalid based on the relationship
+     * between the current assembly and the parent assembly.
+     *
+     * @param Assembly|null $currentAssembly The current assembly being analyzed. Null indicates no assembly is referenced.
+     * @param Assembly      $parentAssembly The parent assembly to check against the current assembly.
+     *
+     * @return bool Returns
+     */
+    private function isInvalidBomEntry(?Assembly $currentAssembly, Assembly $parentAssembly): bool
+    {
+        //No assembly referenced -> no problems
+        if ($currentAssembly === null) {
+            return false;
+        }
+
+        //Check: is the current assembly a descendant of the parent assembly?
+        if ($currentAssembly->isChildOf($parentAssembly)) {
+            return true;
+        }
+
+        //Recursive check: Analyze the current assembly list
+        foreach ($currentAssembly->getBomEntries() as $bomEntry) {
+            $referencedAssembly = $bomEntry->getReferencedAssembly();
+
+            if ($this->isInvalidBomEntry($referencedAssembly, $parentAssembly)) {
+                return true;
+            }
+        }
+
+        return false;
+
+    }
+
+    /**
+     * Adds a violation to the current context if it hasn’t already been added.
+     *
+     * This method checks whether a violation with the same property path as the current violation
+     * already exists in the context. If such a violation is found, the current violation is not added again.
+     * The process involves reflection to access private or protected properties of violation objects.
+     *
+     * @param mixed                     $value The value that triggered the violation.
+     * @param AssemblyInvalidBomEntry   $constraint The constraint containing the validation details.
+     *
+     */
+    private function addViolation($value, AssemblyInvalidBomEntry $constraint): void
+    {
+        /** @var ConstraintViolationBuilder $buildViolation */
+        $buildViolation = $this->context->buildViolation($constraint->message)
+            ->setParameter('%name%', $value->getName());
+
+        $alreadyAdded = false;
+
+        try {
+            $reflectionClass = new ReflectionClass($buildViolation);
+            $property = $reflectionClass->getProperty('propertyPath');
+            $propertyPath = $property->getValue($buildViolation);
+
+            $availableViolations = $this->context->getViolations();
+
+            foreach ($availableViolations as $tmpViolation) {
+                $tmpReflectionClass = new ReflectionClass($tmpViolation);
+                $tmpProperty = $tmpReflectionClass->getProperty('propertyPath');
+                $tmpPropertyPath = $tmpProperty->getValue($tmpViolation);
+
+                if ($tmpPropertyPath === $propertyPath) {
+                    $alreadyAdded = true;
+                }
+            }
+        } catch (\ReflectionException) {
+        }
+
+        if (!$alreadyAdded) {
+            $buildViolation->addViolation();
+        }
+    }
+}