add implementation

src/Types/UlidType.php

@@ -0,0 +1,74 @@
+<?php declare(strict_types=1);
+
+namespace Lubiana\DoctrineUlid\Types;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Types\Exception\InvalidType;
+use Doctrine\DBAL\Types\Exception\ValueNotConvertible;
+use Doctrine\DBAL\Types\Type;
+use Symfony\Component\Uid\Ulid;
+
+final class UlidType extends Type
+{
+    public const NAME = 'ulid';
+
+    /**
+     * @inheritDoc
+     */
+    public function getSQLDeclaration(array $column, AbstractPlatform $platform): string
+    {
+        if ($this->hasNativeGuidType($platform)) {
+            return $platform->getGuidTypeDeclarationSQL($column);
+        }
+
+        return $platform->getBinaryTypeDeclarationSQL([
+            'length' => 16,
+            'fixed' => true,
+        ]);
+    }
+
+    public function convertToPHPValue(mixed $value, AbstractPlatform $platform): ?Ulid
+    {
+        if ($value instanceof Ulid || $value === null) {
+            return $value;
+        }
+        if (!is_string($value)) {
+            throw InvalidType::new($value, self::NAME, ['null', 'string', self::class]);
+        }
+        try {
+            return Ulid::fromString($value);
+        } catch (\InvalidArgumentException $e) {
+            throw ValueNotConvertible::new($value, self::NAME, null, $e);
+        }
+    }
+
+    public function convertToDatabaseValue(mixed $value, AbstractPlatform $platform): ?string
+    {
+        $toStringFunc = fn (Ulid $v) => $v->toRfc4122();
+        if (!$this->hasNativeGuidType($platform)) {
+            $toStringFunc = fn (Ulid $v) => $v->toBinary();
+        }
+
+        if ($value instanceof Ulid) {
+            return $toStringFunc($value);
+        }
+
+        if ($value === null || $value === '') {
+            return null;
+        }
+
+        if (!\is_string($value)) {
+            throw InvalidType::new($value, self::NAME, ['null', 'string', self::class]);
+        }
+        try {
+            return $toStringFunc(Ulid::fromString($value));
+        } catch (\InvalidArgumentException $e) {
+            throw ValueNotConvertible::new($value, self::NAME, null, $e);
+        }
+    }
+
+    private function hasNativeGuidType(AbstractPlatform $platform): bool
+    {
+        return $platform->getGuidTypeDeclarationSQL([]) !== $platform->getStringTypeDeclarationSQL(['fixed' => true, 'length' => 36]);
+    }
+}