validation: no more workflow without dest

src/Bundle/ChillMainBundle/Workflow/Validator/StepDestValid.php

@@ -0,0 +1,26 @@
+<?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\MainBundle\Workflow\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+class StepDestValid extends Constraint
+{
+    public string $messageDestNotAllowed = 'workflow.As the step is final, no dest are allowed';
+
+    public string $messageRequireDest = 'workflow.As the step is not final, dest are required';
+
+    public function getTargets()
+    {
+        return [self::CLASS_CONSTRAINT];
+    }
+}

src/Bundle/ChillMainBundle/Workflow/Validator/StepDestValidValidator.php

@@ -0,0 +1,49 @@
+<?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\MainBundle\Workflow\Validator;
+
+use Chill\MainBundle\Entity\Workflow\EntityWorkflowStep;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+use function count;
+
+class StepDestValidValidator extends ConstraintValidator
+{
+    /**
+     * @param EntityWorkflowStep $value
+     * @param Constraint|StepDestValid $constraint
+     *
+     * @return void
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof StepDestValid) {
+            throw new UnexpectedTypeException($constraint, StepDestValid::class);
+        }
+
+        if (!$value instanceof EntityWorkflowStep) {
+            throw new UnexpectedValueException($value, EntityWorkflowStep::class);
+        }
+
+        if ($value->isFinal() && 0 < count($value->getDestUser())) {
+            $this->context->buildViolation($constraint->messageDestNotAllowed)
+                ->addViolation();
+        }
+
+        if (!$value->isFinal() && 0 === count($value->getDestUser())) {
+            $this->context->buildViolation($constraint->messageRequireDest)
+                ->addViolation();
+        }
+    }
+}