1 files changed, 217 insertions, 6 deletions
diff --git a/phpBB/phpbb/cache/driver/base.php b/phpBB/phpbb/cache/driver/base.php
index feaca25a5b..55cd4668de 100644
--- a/phpBB/phpbb/cache/driver/base.php
+++ b/phpBB/phpbb/cache/driver/base.php
@@ -1,17 +1,228 @@
 <?php
 /**
 *
-* @package acm
-* @copyright (c) 2010 phpBB Group
-* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+* 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\cache\driver;
 
-/**
-* @package acm
-*/
 abstract class base implements \phpbb\cache\driver\driver_interface
 {
+	var $vars = array();
+	var $is_modified = false;
+
+	var $sql_rowset = array();
+	var $sql_row_pointer = array();
+	var $cache_dir = '';
+
+	/**
+	* {@inheritDoc}
+	*/
+	function purge()
+	{
+		// Purge all phpbb cache files
+		try
+		{
+			$iterator = new \DirectoryIterator($this->cache_dir);
+		}
+		catch (\Exception $e)
+		{
+			return;
+		}
+
+		foreach ($iterator as $fileInfo)
+		{
+			if ($fileInfo->isDot())
+			{
+				continue;
+			}
+			$filename = $fileInfo->getFilename();
+			if ($fileInfo->isDir())
+			{
+				$this->remove_dir($fileInfo->getPathname());
+			}
+			else if (strpos($filename, 'container_') === 0 ||
+				strpos($filename, 'url_matcher') === 0 ||
+				strpos($filename, 'url_generator') === 0 ||
+				strpos($filename, 'sql_') === 0 ||
+				strpos($filename, 'data_') === 0)
+			{
+				$this->remove_file($fileInfo->getPathname());
+			}
+		}
+
+		unset($this->vars);
+		unset($this->sql_rowset);
+		unset($this->sql_row_pointer);
+
+		$this->vars = array();
+		$this->sql_rowset = array();
+		$this->sql_row_pointer = array();
+
+		$this->is_modified = false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function unload()
+	{
+		$this->save();
+		unset($this->vars);
+		unset($this->sql_rowset);
+		unset($this->sql_row_pointer);
+
+		$this->vars = array();
+		$this->sql_rowset = array();
+		$this->sql_row_pointer = array();
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_load($query)
+	{
+		// Remove extra spaces and tabs
+		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
+		$query_id = md5($query);
+
+		if (($result = $this->_read('sql_' . $query_id)) === false)
+		{
+			return false;
+		}
+
+		$this->sql_rowset[$query_id] = $result;
+		$this->sql_row_pointer[$query_id] = 0;
+
+		return $query_id;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_exists($query_id)
+	{
+		return isset($this->sql_rowset[$query_id]);
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_fetchrow($query_id)
+	{
+		if ($this->sql_row_pointer[$query_id] < sizeof($this->sql_rowset[$query_id]))
+		{
+			return $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++];
+		}
+
+		return false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_fetchfield($query_id, $field)
+	{
+		if ($this->sql_row_pointer[$query_id] < sizeof($this->sql_rowset[$query_id]))
+		{
+			return (isset($this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]][$field])) ? $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++][$field] : false;
+		}
+
+		return false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_rowseek($rownum, $query_id)
+	{
+		if ($rownum >= sizeof($this->sql_rowset[$query_id]))
+		{
+			return false;
+		}
+
+		$this->sql_row_pointer[$query_id] = $rownum;
+		return true;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function sql_freeresult($query_id)
+	{
+		if (!isset($this->sql_rowset[$query_id]))
+		{
+			return false;
+		}
+
+		unset($this->sql_rowset[$query_id]);
+		unset($this->sql_row_pointer[$query_id]);
+
+		return true;
+	}
+
+	/**
+	* Removes/unlinks file
+	*
+	* @param string $filename Filename to remove
+	* @param bool $check Check file permissions
+	* @return bool True if the file was successfully removed, otherwise false
+	*/
+	function remove_file($filename, $check = false)
+	{
+		global $phpbb_filesystem;
+
+		if ($check && !$phpbb_filesystem->is_writable($this->cache_dir))
+		{
+			// E_USER_ERROR - not using language entry - intended.
+			trigger_error('Unable to remove files within ' . $this->cache_dir . '. Please check directory permissions.', E_USER_ERROR);
+		}
+
+		return @unlink($filename);
+	}
+
+	/**
+	* Remove directory
+	*
+	* @param string $dir Directory to remove
+	*
+	* @return null
+	*/
+	protected function remove_dir($dir)
+	{
+		try
+		{
+			$iterator = new \DirectoryIterator($dir);
+		}
+		catch (\Exception $e)
+		{
+			return;
+		}
+
+		foreach ($iterator as $fileInfo)
+		{
+			if ($fileInfo->isDot())
+			{
+				continue;
+			}
+
+			if ($fileInfo->isDir())
+			{
+				$this->remove_dir($fileInfo->getPathname());
+			}
+			else
+			{
+				$this->remove_file($fileInfo->getPathname());
+			}
+		}
+
+		@rmdir($dir);
+	}
 }