1 files changed, 431 insertions, 0 deletions
diff --git a/phpBB/phpbb/db/driver/sqlite3.php b/phpBB/phpbb/db/driver/sqlite3.php
new file mode 100644
index 0000000000..0508500c52
--- /dev/null
+++ b/phpBB/phpbb/db/driver/sqlite3.php
@@ -0,0 +1,431 @@
+<?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\driver;
+
+/**
+* SQLite3 Database Abstraction Layer
+* Minimum Requirement: 3.6.15+
+*/
+class sqlite3 extends \phpbb\db\driver\driver
+{
+	/**
+	* @var	string		Stores errors during connection setup in case the driver is not available
+	*/
+	protected $connect_error = '';
+
+	/**
+	* @var	\SQLite3	The SQLite3 database object to operate against
+	*/
+	protected $dbo = null;
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
+	{
+		$this->persistency = false;
+		$this->user = $sqluser;
+		$this->server = $sqlserver . (($port) ? ':' . $port : '');
+		$this->dbname = $database;
+
+		if (!class_exists('SQLite3', false))
+		{
+			$this->connect_error = 'SQLite3 not found, is the extension installed?';
+			return $this->sql_error('');
+		}
+
+		try
+		{
+			$this->dbo = new \SQLite3($this->server, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE);
+			$this->dbo->busyTimeout(60000);
+			$this->db_connect_id = true;
+		}
+		catch (\Exception $e)
+		{
+			$this->connect_error = $e->getMessage();
+			return array('message' => $this->connect_error);
+		}
+
+		return true;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_server_info($raw = false, $use_cache = true)
+	{
+		global $cache;
+
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('sqlite_version')) === false)
+		{
+			$version = \SQLite3::version();
+
+			$this->sql_server_version = $version['versionString'];
+
+			if (!empty($cache) && $use_cache)
+			{
+				$cache->put('sqlite_version', $this->sql_server_version);
+			}
+		}
+
+		return ($raw) ? $this->sql_server_version : 'SQLite ' . $this->sql_server_version;
+	}
+
+	/**
+	* SQL Transaction
+	*
+	* @param	string	$status		Should be one of the following strings:
+	*								begin, commit, rollback
+	* @return	bool	Success/failure of the transaction query
+	*/
+	protected function _sql_transaction($status = 'begin')
+	{
+		switch ($status)
+		{
+			case 'begin':
+				return $this->dbo->exec('BEGIN IMMEDIATE');
+			break;
+
+			case 'commit':
+				return $this->dbo->exec('COMMIT');
+			break;
+
+			case 'rollback':
+				return @$this->dbo->exec('ROLLBACK');
+			break;
+		}
+
+		return true;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_query($query = '', $cache_ttl = 0)
+	{
+		if ($query != '')
+		{
+			global $cache;
+
+			// EXPLAIN only in extra debug mode
+			if (defined('DEBUG'))
+			{
+				$this->sql_report('start', $query);
+			}
+			else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
+			{
+				$this->curtime = microtime(true);
+			}
+
+			$this->last_query_text = $query;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
+			$this->sql_add_num_queries($this->query_result);
+
+			if ($this->query_result === false)
+			{
+				if ($this->transaction === true && strpos($query, 'INSERT') === 0)
+				{
+					$query = preg_replace('/^INSERT INTO/', 'INSERT OR ROLLBACK INTO', $query);
+				}
+
+				if (($this->query_result = @$this->dbo->query($query)) === false)
+				{
+					// Try to recover a lost database connection
+					if ($this->dbo && !@$this->dbo->lastErrorMsg())
+					{
+						if ($this->sql_connect($this->server, $this->user, '', $this->dbname))
+						{
+							$this->query_result = @$this->dbo->query($query);
+						}
+					}
+
+					if ($this->query_result === false)
+					{
+						$this->sql_error($query);
+					}
+				}
+
+				if (defined('DEBUG'))
+				{
+					$this->sql_report('stop', $query);
+				}
+				else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
+				{
+					$this->sql_time += microtime(true) - $this->curtime;
+				}
+
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
+				if ($cache && $cache_ttl)
+				{
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
+				}
+			}
+			else if (defined('DEBUG'))
+			{
+				$this->sql_report('fromcache', $query);
+			}
+		}
+		else
+		{
+			return false;
+		}
+
+		return $this->query_result;
+	}
+
+	/**
+	* Build LIMIT query
+	*
+	* @param	string	$query		The SQL query to execute
+	* @param	int		$total		The number of rows to select
+	* @param	int		$offset
+	* @param	int		$cache_ttl	Either 0 to avoid caching or
+	*				the time in seconds which the result shall be kept in cache
+	* @return	mixed	Buffered, seekable result handle, false on error
+	*/
+	protected function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
+	{
+		$this->query_result = false;
+
+		// if $total is set to 0 we do not want to limit the number of rows
+		if ($total == 0)
+		{
+			$total = -1;
+		}
+
+		$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
+
+		return $this->sql_query($query, $cache_ttl);
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_affectedrows()
+	{
+		return ($this->db_connect_id) ? $this->dbo->changes() : false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_fetchrow($query_id = false)
+	{
+		global $cache;
+
+		if ($query_id === false)
+		{
+			/** @var \SQLite3Result $query_id */
+			$query_id = $this->query_result;
+		}
+
+		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
+		{
+			return $cache->sql_fetchrow($query_id);
+		}
+
+		return is_object($query_id) ? @$query_id->fetchArray(SQLITE3_ASSOC) : false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_nextid()
+	{
+		return ($this->db_connect_id) ? $this->dbo->lastInsertRowID() : false;
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_freeresult($query_id = false)
+	{
+		global $cache;
+
+		if ($query_id === false)
+		{
+			$query_id = $this->query_result;
+		}
+
+		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
+		{
+			return $cache->sql_freeresult($query_id);
+		}
+
+		if ($query_id)
+		{
+			return @$query_id->finalize();
+		}
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	public function sql_escape($msg)
+	{
+		return \SQLite3::escapeString($msg);
+	}
+
+	/**
+	* {@inheritDoc}
+	*
+	* For SQLite an underscore is an unknown character.
+	*/
+	public function sql_like_expression($expression)
+	{
+		// Unlike LIKE, GLOB is unfortunately case sensitive.
+		// We only catch * and ? here, not the character map possible on file globbing.
+		$expression = str_replace(array(chr(0) . '_', chr(0) . '%'), array(chr(0) . '?', chr(0) . '*'), $expression);
+
+		$expression = str_replace(array('?', '*'), array("\?", "\*"), $expression);
+		$expression = str_replace(array(chr(0) . "\?", chr(0) . "\*"), array('?', '*'), $expression);
+
+		return 'GLOB \'' . $this->sql_escape($expression) . '\'';
+	}
+
+	/**
+	* {@inheritDoc}
+	*
+	* For SQLite an underscore is an unknown character.
+	*/
+	public function sql_not_like_expression($expression)
+	{
+		// Unlike NOT LIKE, NOT GLOB is unfortunately case sensitive
+		// We only catch * and ? here, not the character map possible on file globbing.
+		$expression = str_replace(array(chr(0) . '_', chr(0) . '%'), array(chr(0) . '?', chr(0) . '*'), $expression);
+
+		$expression = str_replace(array('?', '*'), array("\?", "\*"), $expression);
+		$expression = str_replace(array(chr(0) . "\?", chr(0) . "\*"), array('?', '*'), $expression);
+
+		return 'NOT GLOB \'' . $this->sql_escape($expression) . '\'';
+	}
+
+	/**
+	* return sql error array
+	*
+	* @return array
+	*/
+	protected function _sql_error()
+	{
+		if (class_exists('SQLite3', false) && isset($this->dbo))
+		{
+			$error = array(
+				'message'	=> $this->dbo->lastErrorMsg(),
+				'code'		=> $this->dbo->lastErrorCode(),
+			);
+		}
+		else
+		{
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
+			);
+		}
+
+		return $error;
+	}
+
+	/**
+	* Build db-specific query data
+	*
+	* @param	string	$stage		Available stages: FROM, WHERE
+	* @param	mixed	$data		A string containing the CROSS JOIN query or an array of WHERE clauses
+	*
+	* @return	string	The db-specific query fragment
+	*/
+	protected function _sql_custom_build($stage, $data)
+	{
+		return $data;
+	}
+
+	/**
+	* Close sql connection
+	*
+	* @return	bool		False if failure
+	*/
+	protected function _sql_close()
+	{
+		return $this->dbo->close();
+	}
+
+	/**
+	* Build db-specific report
+	*
+	* @param	string	$mode		Available modes: display, start, stop,
+	*								add_select_row, fromcache, record_fromcache
+	* @param	string	$query		The Query that should be explained
+	* @return	mixed		Either a full HTML page, boolean or null
+	*/
+	protected function _sql_report($mode, $query = '')
+	{
+		switch ($mode)
+		{
+			case 'start':
+
+				$explain_query = $query;
+				if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
+				{
+					$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
+				}
+				else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
+				{
+					$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
+				}
+
+				if (preg_match('/^SELECT/', $explain_query))
+				{
+					$html_table = false;
+
+					if ($result = $this->dbo->query("EXPLAIN QUERY PLAN $explain_query"))
+					{
+						while ($row = $result->fetchArray(SQLITE3_ASSOC))
+						{
+							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
+						}
+					}
+
+					if ($html_table)
+					{
+						$this->html_hold .= '</table>';
+					}
+				}
+
+			break;
+
+			case 'fromcache':
+				$endtime = explode(' ', microtime());
+				$endtime = $endtime[0] + $endtime[1];
+
+				$result = $this->dbo->query($query);
+				if ($result)
+				{
+						while ($void = $result->fetchArray(SQLITE3_ASSOC))
+						{
+							// Take the time spent on parsing rows into account
+						}
+				}
+
+				$splittime = explode(' ', microtime());
+				$splittime = $splittime[0] + $splittime[1];
+
+				$this->sql_report('record_fromcache', $query, $endtime, $splittime);
+
+			break;
+		}
+	}
+}