[ticket/16741] Database tools to use Doctrine

PHPBB3-16741

phpBB/phpbb/db/doctrine/case_insensitive_string.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\doctrine;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Types\Type;
+
+/**
+ * Case-insensitive string type (only supported by Postgres).
+ */
+class case_insensitive_string extends Type
+{
+	public const CASE_INSENSITIVE_STRING = 'string_ci';
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getSQLDeclaration(array $column, AbstractPlatform $platform): string
+	{
+		if ($platform->getName() === 'postgresql')
+		{
+			return 'varchar_ci';
+		}
+
+		// This relies on our own oracle_platform implementation, and the fact that
+		// we used 3 times larger capacity for strings on oracle for unicode strings
+		// as on other platforms. This is not the case with varchar_ci, which uses
+		// the same length as other platforms.
+		if ($platform->getName() === 'oracle')
+		{
+			return $platform->getAsciiStringTypeDeclarationSQL($column);
+		}
+
+		return $platform->getVarcharTypeDeclarationSQL($column);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getName(): string
+	{
+		return self::CASE_INSENSITIVE_STRING;
+	}
+}