new form type to select a daytime in system-configuration (#1895)

src/Validator/Constraints/TimeFormatValidator.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+class TimeFormatValidator extends ConstraintValidator
+{
+    /**
+     * @param string|mixed $value
+     * @param Constraint $constraint
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!($constraint instanceof TimeFormat)) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__ . '\TimeFormat');
+        }
+
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedValueException($value, 'string');
+        }
+
+        $value = (string) $value;
+
+        if (preg_match('/^([01][0-9]|2[0-3]):([0-5][0-9])$/', $value) !== 1) {
+            $this->context->buildViolation('The given value is not a valid time.')
+                ->setTranslationDomain('validators')
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode(TimeFormat::INVALID_FORMAT)
+                ->addViolation();
+        }
+    }
+}