symfony · przemyslaw-bogusz · Feb 13, 2020 · Feb 15, 2020
diff --git a/src/Symfony/Component/Validator/Constraints/RgbColor.php b/src/Symfony/Component/Validator/Constraints/RgbColor.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\InvalidArgumentException;
+
+/**
+ * @Annotation
+ * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
+ *
+ * @author Przemysław Bogusz <przemyslaw.bogusz@tubotax.pl>
+ */
+class RgbColor extends Constraint
+{
+    public const INVALID_FORMAT_ERROR = '5720b8cb-fb2a-430e-94e9-2d33b4cd1fa9';
+
+    protected static $errorNames = [
+        self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
+    ];
+
+    public $message = 'This is not a valid RGB color.';
+    public $allowAlpha = true;
+    public $alphaPrecision = 2;
+    public $lowerCaseOnly = false;
+
+    public function __construct($options = null)
+    {
+        parent::__construct($options);
+
+        if (!\is_int($this->alphaPrecision) || 1 > $this->alphaPrecision) {
+            throw new InvalidArgumentException(sprintf('The "alphaPrecision" option must be a positive integer ("%s" given)', $this->alphaPrecision));
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/RgbColorValidator.php b/src/Symfony/Component/Validator/Constraints/RgbColorValidator.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+/**
+ * @author Przemysław Bogusz <przemyslaw.bogusz@tubotax.pl>
+ */
+class RgbColorValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof RgbColor) {
+            throw new UnexpectedTypeException($constraint, RgbColor::class);
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!\is_string($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedValueException($value, 'string');
+        }
+
+        $value = (string) $value;
+
+        $pattern = sprintf('/^rgb%s\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})%s\)$/%s', $constraint->allowAlpha ? 'a?' : '', $constraint->allowAlpha ? '(,\s*[0-1]{0,1}(?:\.\d{1,'.$constraint->alphaPrecision.'})?)?' : '', $constraint->lowerCaseOnly ? '' : 'i');
+
+        if (!preg_match($pattern, $value, $matches) || !$this->areRangesValid($matches)) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode(RgbColor::INVALID_FORMAT_ERROR)
+                ->addViolation();
+        }
+    }
+
+    private function areRangesValid(array $matches): bool
+    {
+        for ($i = 1; $i < 4; ++$i) {
+            if (0 > $matches[$i] || 255 < $matches[$i]) {
+                return false;
+            }
+        }
+
+        if ($alpha = trim($matches[4] ?? null, ',')) {
+            if (0 > $alpha || 1 < $alpha) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf b/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf
@@ -370,6 +370,10 @@
                 <source>This value is not a valid hostname.</source>
                 <target>This value is not a valid hostname.</target>
             </trans-unit>
+            <trans-unit id="96">
+                <source>This is not a valid RGB color.</source>
+                <target>This is not a valid RGB color.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>
diff --git a/src/Symfony/Component/Validator/Resources/translations/validators.pl.xlf b/src/Symfony/Component/Validator/Resources/translations/validators.pl.xlf
@@ -334,6 +334,10 @@
                 <source>This value should be between {{ min }} and {{ max }}.</source>
                 <target>Ta wartość powinna być pomiędzy {{ min }} a {{ max }}.</target>
             </trans-unit>
+            <trans-unit id="96">
+                <source>This is not a valid RGB color.</source>
+                <target>To nie jest poprawny kolor RGB.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>