feat: assignments with disabled formalities

addresses #869dnvm8c

src/Form/AssignmentType.php

@@ -11,6 +11,7 @@ use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\EntityRepository;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\Extension\Core\Type\IntegerType;
 use Symfony\Component\Form\Extension\Core\Type\TextareaType;
@@ -147,6 +148,7 @@ class AssignmentType extends AbstractType
                 $data = $event->getData();
 
                 $this->addStatusField($data, $form);
+                $this->addSkipFormalitiesField($data, $form);
 
                 $destination = $data->getDestination();
 
@@ -212,6 +214,36 @@ class AssignmentType extends AbstractType
         ]);
     }
 
+    /**
+     * Whether the skip-formalities flag is frozen for a given assignment.
+     *
+     * It decides which status a Disposition is created in, so flipping it once placements
+     * exist would leave them stranded halfway through a process that no longer applies -
+     * a teamer confirmed without a contract, or one still being chased for a contract on an
+     * assignment that no longer wants one.
+     *
+     * Enforced through the form's `disabled` option, which makes Symfony ignore whatever is
+     * submitted for the field, so this holds against a hand-crafted POST too.
+     */
+    public static function isSkipFormalitiesLocked(?Assignment $assignment): bool
+    {
+        return 0 < ($assignment?->getDispositions()->count() ?? 0);
+    }
+
+    private function addSkipFormalitiesField(?Assignment $assignment, FormInterface $form): void
+    {
+        $isLocked = self::isSkipFormalitiesLocked($assignment);
+
+        $form->add('skipFormalities', CheckboxType::class, [
+            'label' => '"Partymodus": Ohne Vertrags-, Honorarnoten- und Feedbackprozess',
+            'required' => false,
+            'disabled' => $isLocked,
+            'help' => $isLocked
+                ? 'Nicht mehr änderbar, sobald Teamer:innen eingeteilt sind.'
+                : 'Teamer:innen bewerben sich und werden eingeteilt; danach ist der Einsatz abgeschlossen.',
+        ]);
+    }
+
     private function addPickupField(Destination $destination, FormInterface $form): void
     {
         $choices = [];