1 files changed, 378 insertions, 0 deletions
diff --git a/include/dblayer/mysql.php b/include/dblayer/mysql.php
new file mode 100644
index 0000000..1b36648
--- /dev/null
+++ b/include/dblayer/mysql.php
@@ -0,0 +1,378 @@
+<?php
+
+/**
+ * Copyright (C) 2008-2012 FluxBB
+ * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB
+ * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
+ */
+
+// Make sure we have built in support for MySQL
+if (!function_exists('mysql_connect'))
+	exit('This PHP environment doesn\'t have MySQL support built in. MySQL support is required if you want to use a MySQL database to run this forum. Consult the PHP documentation for further assistance.');
+
+
+class DBLayer
+{
+	var $prefix;
+	var $link_id;
+	var $query_result;
+
+	var $saved_queries = array();
+	var $num_queries = 0;
+
+	var $error_no = false;
+	var $error_msg = 'Unknown';
+
+	var $datatype_transformations = array(
+		'%^SERIAL$%'	=>	'INT(10) UNSIGNED AUTO_INCREMENT'
+	);
+
+
+	function __construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+	{
+		$this->prefix = $db_prefix;
+
+		if ($p_connect)
+			$this->link_id = @mysql_pconnect($db_host, $db_username, $db_password);
+		else
+			$this->link_id = @mysql_connect($db_host, $db_username, $db_password);
+
+		if ($this->link_id)
+		{
+			if (!@mysql_select_db($db_name, $this->link_id))
+				error('Unable to select database. MySQL reported: '.mysql_error(), __FILE__, __LINE__);
+		}
+		else
+			error('Unable to connect to MySQL server. MySQL reported: '.mysql_error(), __FILE__, __LINE__);
+
+		// Setup the client-server character set (UTF-8)
+		if (!defined('FORUM_NO_SET_NAMES'))
+			$this->set_names('utf8');
+
+		return $this->link_id;
+	}
+	
+
+	function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+	{
+		$this->__construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect);
+	}
+
+
+	function start_transaction()
+	{
+		return;
+	}
+
+
+	function end_transaction()
+	{
+		return;
+	}
+
+
+	function query($sql, $unbuffered = false)
+	{
+		if (defined('PUN_SHOW_QUERIES'))
+			$q_start = get_microtime();
+
+		if ($unbuffered)
+			$this->query_result = @mysql_unbuffered_query($sql, $this->link_id);
+		else
+			$this->query_result = @mysql_query($sql, $this->link_id);
+
+		if ($this->query_result)
+		{
+			if (defined('PUN_SHOW_QUERIES'))
+				$this->saved_queries[] = array($sql, sprintf('%.5F', get_microtime() - $q_start));
+
+			++$this->num_queries;
+
+			return $this->query_result;
+		}
+		else
+		{
+			if (defined('PUN_SHOW_QUERIES'))
+				$this->saved_queries[] = array($sql, 0);
+
+			$this->error_no = @mysql_errno($this->link_id);
+			$this->error_msg = @mysql_error($this->link_id);
+
+			return false;
+		}
+	}
+
+
+	function result($query_id = 0, $row = 0, $col = 0)
+	{
+		return ($query_id) ? @mysql_result($query_id, $row, $col) : false;
+	}
+
+
+	function fetch_assoc($query_id = 0)
+	{
+		return ($query_id) ? @mysql_fetch_assoc($query_id) : false;
+	}
+
+
+	function fetch_row($query_id = 0)
+	{
+		return ($query_id) ? @mysql_fetch_row($query_id) : false;
+	}
+
+
+	function num_rows($query_id = 0)
+	{
+		return ($query_id) ? @mysql_num_rows($query_id) : false;
+	}
+
+
+	function affected_rows()
+	{
+		return ($this->link_id) ? @mysql_affected_rows($this->link_id) : false;
+	}
+
+
+	function insert_id()
+	{
+		return ($this->link_id) ? @mysql_insert_id($this->link_id) : false;
+	}
+
+
+	function get_num_queries()
+	{
+		return $this->num_queries;
+	}
+
+
+	function get_saved_queries()
+	{
+		return $this->saved_queries;
+	}
+
+
+	function free_result($query_id = false)
+	{
+		return ($query_id) ? @mysql_free_result($query_id) : false;
+	}
+
+
+	function escape($str)
+	{
+		if (is_array($str))
+			return '';
+		else if (function_exists('mysql_real_escape_string'))
+			return mysql_real_escape_string($str, $this->link_id);
+		else
+			return mysql_escape_string($str);
+	}
+
+
+	function error()
+	{
+		$result['error_sql'] = @current(@end($this->saved_queries));
+		$result['error_no'] = $this->error_no;
+		$result['error_msg'] = $this->error_msg;
+
+		return $result;
+	}
+
+
+	function close()
+	{
+		if ($this->link_id)
+		{
+			if (is_resource($this->query_result))
+				@mysql_free_result($this->query_result);
+
+			return @mysql_close($this->link_id);
+		}
+		else
+			return false;
+	}
+
+	function get_names()
+	{
+		$result = $this->query('SHOW VARIABLES LIKE \'character_set_connection\'');
+		return $this->result($result, 0, 1);
+	}
+
+
+	function set_names($names)
+	{
+		return $this->query('SET NAMES \''.$this->escape($names).'\'');
+	}
+
+
+	function get_version()
+	{
+		$result = $this->query('SELECT VERSION()');
+
+		return array(
+			'name'		=> 'MySQL Standard',
+			'version'	=> preg_replace('%^([^-]+).*$%', '\\1', $this->result($result))
+		);
+	}
+
+
+	function table_exists($table_name, $no_prefix = false)
+	{
+		$result = $this->query('SHOW TABLES LIKE \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\'');
+		return $this->num_rows($result) > 0;
+	}
+
+
+	function field_exists($table_name, $field_name, $no_prefix = false)
+	{
+		$result = $this->query('SHOW COLUMNS FROM '.($no_prefix ? '' : $this->prefix).$table_name.' LIKE \''.$this->escape($field_name).'\'');
+		return $this->num_rows($result) > 0;
+	}
+
+
+	function index_exists($table_name, $index_name, $no_prefix = false)
+	{
+		$exists = false;
+
+		$result = $this->query('SHOW INDEX FROM '.($no_prefix ? '' : $this->prefix).$table_name);
+		while ($cur_index = $this->fetch_assoc($result))
+		{
+			if (strtolower($cur_index['Key_name']) == strtolower(($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name))
+			{
+				$exists = true;
+				break;
+			}
+		}
+
+		return $exists;
+	}
+
+
+	function create_table($table_name, $schema, $no_prefix = false)
+	{
+		if ($this->table_exists($table_name, $no_prefix))
+			return true;
+
+		$query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n";
+
+		// Go through every schema element and add it to the query
+		foreach ($schema['FIELDS'] as $field_name => $field_data)
+		{
+			$field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']);
+
+			$query .= $field_name.' '.$field_data['datatype'];
+
+			if (isset($field_data['collation']))
+				$query .= 'CHARACTER SET utf8 COLLATE utf8_'.$field_data['collation'];
+
+			if (!$field_data['allow_null'])
+				$query .= ' NOT NULL';
+
+			if (isset($field_data['default']))
+				$query .= ' DEFAULT '.$field_data['default'];
+
+			$query .= ",\n";
+		}
+
+		// If we have a primary key, add it
+		if (isset($schema['PRIMARY KEY']))
+			$query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n";
+
+		// Add unique keys
+		if (isset($schema['UNIQUE KEYS']))
+		{
+			foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields)
+				$query .= 'UNIQUE KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$key_name.'('.implode(',', $key_fields).'),'."\n";
+		}
+
+		// Add indexes
+		if (isset($schema['INDEXES']))
+		{
+			foreach ($schema['INDEXES'] as $index_name => $index_fields)
+				$query .= 'KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.'('.implode(',', $index_fields).'),'."\n";
+		}
+
+		// We remove the last two characters (a newline and a comma) and add on the ending
+		$query = substr($query, 0, strlen($query) - 2)."\n".') ENGINE = '.(isset($schema['ENGINE']) ? $schema['ENGINE'] : 'MyISAM').' CHARACTER SET utf8';
+
+		return $this->query($query) ? true : false;
+	}
+
+
+	function drop_table($table_name, $no_prefix = false)
+	{
+		if (!$this->table_exists($table_name, $no_prefix))
+			return true;
+
+		return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
+	}
+
+
+	function rename_table($old_table, $new_table, $no_prefix = false)
+	{
+		// If the new table exists and the old one doesn't, then we're happy
+		if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix))
+			return true;
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false;
+	}
+
+
+	function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
+	{
+		if ($this->field_exists($table_name, $field_name, $no_prefix))
+			return true;
+
+		$field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
+
+		if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value))
+			$default_value = '\''.$this->escape($default_value).'\'';
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false;
+	}
+
+
+	function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
+	{
+		if (!$this->field_exists($table_name, $field_name, $no_prefix))
+			return true;
+
+		$field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
+
+		if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value))
+			$default_value = '\''.$this->escape($default_value).'\'';
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' MODIFY '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false;
+	}
+
+
+	function drop_field($table_name, $field_name, $no_prefix = false)
+	{
+		if (!$this->field_exists($table_name, $field_name, $no_prefix))
+			return true;
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false;
+	}
+
+
+	function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false)
+	{
+		if ($this->index_exists($table_name, $index_name, $no_prefix))
+			return true;
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ('.implode(',', $index_fields).')') ? true : false;
+	}
+
+
+	function drop_index($table_name, $index_name, $no_prefix = false)
+	{
+		if (!$this->index_exists($table_name, $index_name, $no_prefix))
+			return true;
+
+		return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false;
+	}
+
+	function truncate_table($table_name, $no_prefix = false)
+	{
+		return $this->query('TRUNCATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
+	}
+}