person: add validation to relationship to avoid duplicate

src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicate.php

@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\PersonBundle\Validator\Constraints\Relationship;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class RelationshipNoDuplicate extends Constraint
+{
+    public $message = 'relationship.duplicate';
+
+    public function getTargets()
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}

src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicateValidator.php

@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\PersonBundle\Validator\Constraints\Relationship;
+
+use Chill\PersonBundle\Repository\Relationships\RelationshipRepository;
+use Symfony\Component\Form\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+
+class RelationshipNoDuplicateValidator extends ConstraintValidator
+{
+    private RelationshipRepository $relationshipRepository;
+
+    public function __construct(RelationshipRepository $relationshipRepository)
+    {
+        $this->relationshipRepository = $relationshipRepository;
+    }
+
+    public function validate($relationship, Constraint $constraint)
+    {
+        if (!$constraint instanceof RelationshipNoDuplicate) {
+            throw new UnexpectedTypeException($constraint, RelationshipNoDuplicate::class);
+        }
+
+        $fromPerson = $relationship->getFromPerson();
+        $toPerson = $relationship->getToPerson();
+
+        $relationships = $this->relationshipRepository->findBy([
+            'fromPerson' => $fromPerson,
+            'fromPerson' => $toPerson,
+            'toPerson' => $fromPerson,
+            'toPerson' => $fromPerson,
+        ]);
+
+        foreach ($relationships as $r) {
+            if (
+                $r->getFromPerson() === $fromPerson
+                || $r->getFromPerson() === $toPerson
+                || $r->getToPerson() === $fromPerson
+                || $r->getToPerson() === $toPerson
+            ) {
+                $this->context->buildViolation($constraint->message)
+                    ->addViolation();
+            }
+        }
+    }
+}