ApplyMigrationsForm: new form, just a button

application/forms/ApplyMigrationsForm.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Icinga\Module\Director\Forms;
+
+use Exception;
+use Icinga\Module\Director\Db\Migrations;
+use Icinga\Module\Director\Web\Form\QuickForm;
+
+class ApplyMigrationsForm extends QuickForm
+{
+    protected $migrations;
+
+    public function setup()
+    {
+        $this->setSubmitLabel($this->translate('Apply schema migrations'));
+    }
+
+    public function onSuccess()
+    {
+        try {
+            $this->setSuccessMessage($this->translate(
+                'Pending database schema migrations have successfully been applied'
+            ));
+
+            $this->migrations->applyPendingMigrations();
+            parent::onSuccess();
+        } catch (Exception $e) {
+            $this->addError($e->getMessage());
+        }
+    }
+
+    public function setMigrations(Migrations $migrations)
+    {
+        $this->migrations = $migrations;
+        return $this;
+    }
+}