1 files changed, 113 insertions, 0 deletions
diff --git a/phpBB/phpbb/install/helper/update_helper.php b/phpBB/phpbb/install/helper/update_helper.php
new file mode 100644
index 0000000000..a00731d317
--- /dev/null
+++ b/phpBB/phpbb/install/helper/update_helper.php
@@ -0,0 +1,113 @@
+<?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\install\helper;
+
+/**
+ * General helper functionality for the updater
+ */
+class update_helper
+{
+	/**
+	 * @var string
+	 */
+	protected $path_to_new_files;
+
+	/**
+	 * @var string
+	 */
+	protected $path_to_old_files;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct($phpbb_root_path)
+	{
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->path_to_new_files	= $phpbb_root_path . 'install/update/new/';
+		$this->path_to_old_files	= $phpbb_root_path . 'install/update/old/';
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_new_update_files()
+	{
+		return $this->path_to_new_files;
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_old_update_files()
+	{
+		return $this->path_to_old_files;
+	}
+
+	/**
+	 * Includes the updated file if available
+	 *
+	 * @param string	$filename	Path to the file relative to phpBB root path
+	 */
+	public function include_file($filename)
+	{
+		if (is_file($this->path_to_new_files . $filename))
+		{
+			include_once($this->path_to_new_files . $filename);
+		}
+		else if (is_file($this->phpbb_root_path . $filename))
+		{
+			include_once($this->phpbb_root_path . $filename);
+		}
+	}
+
+	/**
+	 * Customized version_compare()
+	 *
+	 * @param string		$version_number1
+	 * @param string		$version_number2
+	 * @param string|null	$operator
+	 * @return int|bool	The returned value is identical to the PHP build-in function version_compare()
+	 */
+	public function phpbb_version_compare($version_number1, $version_number2, $operator = null)
+	{
+		if ($operator === null)
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2))
+			);
+		}
+		else
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2)),
+				$operator
+			);
+		}
+
+		return $result;
+	}
+}