system/database/DB_utility.php - code-igniter-v3-giggi - Gitiles

 <?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * Code Igniter
  *
  * An open source application development framework for PHP 4.3.2 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
  * @copyright	Copyright (c) 2006, EllisLab, Inc.
  * @license		http://codeigniter.com/user_guide/license.html
  * @link		http://codeigniter.com
  * @since		Version 1.0
  * @filesource
  */

 // ------------------------------------------------------------------------

 /**
  * Database Utility Class
  *
  * @category	Database
  * @author		ExpressionEngine Dev Team
  * @link		http://codeigniter.com/user_guide/database/
  */
 class CI_DB_utility extends CI_DB_forge {

 	var $db;
 	var $data_cache 	= array();

 	/**
 	 * Constructor
 	 *
 	 * Grabs the CI super object instance so we can access it.
 	 *
 	 */
 	function CI_DB_utility()
 	{
 		// Assign the main database object to $this->db
 		$CI =& get_instance();
 		$this->db =& $CI->db;

 		log_message('debug', "Database Utility Class Initialized");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * List databases
 	 *
 	 * @access	public
 	 * @return	bool
 	 */
 	function list_databases()
 	{
 		// Is there a cached result?
 		if (isset($this->data_cache['db_names']))
 		{
 			return $this->data_cache['db_names'];
 		}

 		$query = $this->db->query($this->_list_databases());
 		$dbs = array();
 		if ($query->num_rows() > 0)
 		{
 			foreach ($query->result_array() as $row)
 			{
 				$dbs[] = current($row);
 			}
 		}

 		$this->data_cache['db_names'] = $dbs;
 		return $this->data_cache['db_names'];
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Optimize Table
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @return	bool
 	 */
 	function optimize_table($table_name)
 	{
 		$sql = $this->_optimize_table($table_name);

 		if (is_bool($sql))
 		{
 				show_error('db_must_use_set');
 		}

 		$query = $this->db->query($sql);
 		$res = $query->result_array();

 		// Note: Due to a bug in current() that affects some versions
 		// of PHP we can not pass function call directly into it
 		return current($res);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Optimize Database
 	 *
 	 * @access	public
 	 * @return	array
 	 */
 	function optimize_database()
 	{
 		$result = array();
 		foreach ($this->db->list_tables() as $table_name)
 		{
 			$sql = $this->_optimize_table($table_name);

 			if (is_bool($sql))
 			{
 				return $sql;
 			}

 			$query = $this->db->query($sql);

 			// Build the result array...
 			// Note: Due to a bug in current() that affects some versions
 			// of PHP we can not pass function call directly into it
 			$res = $query->result_array();
 			$res = current($res);
 			$key = str_replace($this->db->database.'.', '', current($res));
 			$keys = array_keys($res);
 			unset($res[$keys[0]]);

 			$result[$key] = $res;
 		}

 		return $result;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Repair Table
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @return	bool
 	 */
 	function repair_table($table_name)
 	{
 		$sql = $this->_repair_table($table_name);

 		if (is_bool($sql))
 		{
 			return $sql;
 		}

 		$query = $this->db->query($sql);

 		// Note: Due to a bug in current() that affects some versions
 		// of PHP we can not pass function call directly into it
 		$res = $query->result_array();
 		return current($res);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Generate CSV from a query result object
 	 *
 	 * @access	public
 	 * @param	object	The query result object
 	 * @param	string	The delimiter - tab by default
 	 * @param	string	The newline character - \n by default
 	 * @return	string
 	 */
 	function csv_from_result($query, $delim = "\t", $newline = "\n")
 	{
 		if ( ! is_object($query) OR ! method_exists($query, 'field_names'))
 		{
 			show_error('You must submit a valid result object');
 		}

 		$out = '';

 		// First generate the headings from the table column names
 		foreach ($query->list_fields() as $name)
 		{
 			$out .= $name.$delim;
 		}

 		$out = rtrim($out);
 		$out .= $newline;

 		// Next blast through the result array and build out the rows
 		foreach ($query->result_array() as $row)
 		{
 			foreach ($row as $item)
 			{
 				$out .= $item.$delim;
 			}
 			$out = rtrim($out);
 			$out .= $newline;
 		}

 		return $out;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Generate XML data from a query result object
 	 *
 	 * @access	public
 	 * @param	object	The query result object
 	 * @param	array	Any preferences
 	 * @return	string
 	 */
 	function xml_from_result($query, $params = array())
 	{
 		if ( ! is_object($query) OR ! method_exists($query, 'field_names'))
 		{
 			show_error('You must submit a valid result object');
 		}

 		// Set our default values
 		foreach (array('root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t") as $key => $val)
 		{
 			if ( ! isset($params[$key]))
 			{
 				$params[$key] = $val;
 			}
 		}

 		// Create variables for convenience
 		extract($params);

 		// Load the xml helper
 		$CI =& get_instance();
 		$CI->load->helper('xml');

 		// Generate the result
 		$xml = "<{$root}>".$newline;
 		foreach ($query->result_array() as $row)
 		{
 			$xml .= $tab."<{$element}>".$newline;

 			foreach ($row as $key => $val)
 			{
 				$xml .= $tab.$tab."<{$key}>".xml_convert($val)."</{$key}>".$newline;
 			}
 			$xml .= $tab."</{$element}>".$newline;
 		}
 		$xml .= "</$root>".$newline;

 		return $xml;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Database Backup
 	 *
 	 * @access	public
 	 * @return	void
 	 */
 	function backup($params = array())
 	{
 		// If the parameters have not been submitted as an
 		// array then we know that it is simply the table
 		// name, which is a valid short cut.
 		if (is_string($params))
 		{
 			$params = array('tables' => $params);
 		}

 		// ------------------------------------------------------

 		// Set up our default preferences
 		$prefs = array(
 							'tables'		=> array(),
 							'ignore'		=> array(),
 							'filename'		=> '',
 							'format'		=> 'gzip', // gzip, zip, txt
 							'add_drop'		=> TRUE,
 							'add_insert'	=> TRUE,
 							'newline'		=> "\n"
 						);

 		// Did the user submit any preferences? If so set them....
 		if (count($params) > 0)
 		{
 			foreach ($prefs as $key => $val)
 			{
 				if (isset($params[$key]))
 				{
 					$prefs[$key] = $params[$key];
 				}
 			}
 		}

 		// ------------------------------------------------------

 		// Are we backing up a complete database or individual tables?
 		// If no table names were submitted we'll fetch the entire table list
 		if (count($prefs['tables']) == 0)
 		{
 			$prefs['tables'] = $this->db->list_tables();
 		}

 		// ------------------------------------------------------

 		// Validate the format
 		if ( ! in_array($prefs['format'], array('gzip', 'zip', 'txt'), TRUE))
 		{
 			$prefs['format'] = 'txt';
 		}

 		// ------------------------------------------------------

 		// Is the encoder supported?  If not, we'll either issue an
 		// error or use plain text depending on the debug settings
 		if (($prefs['format'] == 'gzip' AND ! @function_exists('gzencode'))
 		 OR ($prefs['format'] == 'zip'  AND ! @function_exists('gzcompress')))
 		{
 			if ($this->db->db_debug)
 			{
 				return $this->db->display_error('db_unsuported_compression');
 			}

 			$prefs['format'] = 'txt';
 		}

 		// ------------------------------------------------------

 		// Set the filename if not provided - Only needed with Zip files
 		if ($prefs['filename'] == '' AND $prefs['format'] == 'zip')
 		{
 			$prefs['filename'] = (count($prefs['tables']) == 1) ? $prefs['tables'] : $this->db->database;
 			$prefs['filename'] .= '_'.date('Y-m-d_H-i', time());
 		}

 		// ------------------------------------------------------

 		// Was a Gzip file requested?
 		if ($prefs['format'] == 'gzip')
 		{
 			return gzencode($this->_backup($prefs));
 		}

 		// ------------------------------------------------------

 		// Was a text file requested?
 		if ($prefs['format'] == 'txt')
 		{
 			return $this->_backup($prefs);
 		}

 		// ------------------------------------------------------

 		// Was a Zip file requested?
 		if ($prefs['format'] == 'zip')
 		{
 			// If they included the .zip file extension we'll remove it
 			if (preg_match("|.+?\.zip$|", $prefs['filename']))
 			{
 				$prefs['filename'] = str_replace('.zip', '', $prefs['filename']);
 			}

 			// Tack on the ".sql" file extension if needed
 			if ( ! preg_match("|.+?\.sql$|", $prefs['filename']))
 			{
 				$prefs['filename'] .= '.sql';
 			}

 			// Load the Zip class and output it

 			$CI =& get_instance();
 			$CI->load->library('zip');
 			$CI->zip->add_data($prefs['filename'], $this->_backup($prefs));
 			return $CI->zip->get_zip();
 		}

 	}

 }

 ?>
	<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* Code Igniter
	*
	* An open source application development framework for PHP 4.3.2 or newer
	*
	* @package CodeIgniter
	* @author ExpressionEngine Dev Team
	* @copyright Copyright (c) 2006, EllisLab, Inc.
	* @license http://codeigniter.com/user_guide/license.html
	* @link http://codeigniter.com
	* @since Version 1.0
	* @filesource
	*/

	// ------------------------------------------------------------------------

	/**
	* Database Utility Class
	*
	* @category Database
	* @author ExpressionEngine Dev Team
	* @link http://codeigniter.com/user_guide/database/
	*/
	class CI_DB_utility extends CI_DB_forge {

	var $db;
	var $data_cache = array();

	/**
	* Constructor
	*
	* Grabs the CI super object instance so we can access it.
	*
	*/
	function CI_DB_utility()
	{
	// Assign the main database object to $this->db
	$CI =& get_instance();
	$this->db =& $CI->db;

	log_message('debug', "Database Utility Class Initialized");
	}

	// --------------------------------------------------------------------

	/**
	* List databases
	*
	* @access public
	* @return bool
	*/
	function list_databases()
	{
	// Is there a cached result?
	if (isset($this->data_cache['db_names']))
	{
	return $this->data_cache['db_names'];
	}

	$query = $this->db->query($this->_list_databases());
	$dbs = array();
	if ($query->num_rows() > 0)
	{
	foreach ($query->result_array() as $row)
	{
	$dbs[] = current($row);
	}
	}

	$this->data_cache['db_names'] = $dbs;
	return $this->data_cache['db_names'];
	}

	// --------------------------------------------------------------------

	/**
	* Optimize Table
	*
	* @access public
	* @param string the table name
	* @return bool
	*/
	function optimize_table($table_name)
	{
	$sql = $this->_optimize_table($table_name);

	if (is_bool($sql))
	{
	show_error('db_must_use_set');
	}

	$query = $this->db->query($sql);
	$res = $query->result_array();

	// Note: Due to a bug in current() that affects some versions
	// of PHP we can not pass function call directly into it
	return current($res);
	}

	// --------------------------------------------------------------------

	/**
	* Optimize Database
	*
	* @access public
	* @return array
	*/
	function optimize_database()
	{
	$result = array();
	foreach ($this->db->list_tables() as $table_name)
	{
	$sql = $this->_optimize_table($table_name);

	if (is_bool($sql))
	{
	return $sql;
	}

	$query = $this->db->query($sql);

	// Build the result array...
	// Note: Due to a bug in current() that affects some versions
	// of PHP we can not pass function call directly into it
	$res = $query->result_array();
	$res = current($res);
	$key = str_replace($this->db->database.'.', '', current($res));
	$keys = array_keys($res);
	unset($res[$keys[0]]);

	$result[$key] = $res;
	}

	return $result;
	}

	// --------------------------------------------------------------------

	/**
	* Repair Table
	*
	* @access public
	* @param string the table name
	* @return bool
	*/
	function repair_table($table_name)
	{
	$sql = $this->_repair_table($table_name);

	if (is_bool($sql))
	{
	return $sql;
	}

	$query = $this->db->query($sql);

	// Note: Due to a bug in current() that affects some versions
	// of PHP we can not pass function call directly into it
	$res = $query->result_array();
	return current($res);
	}

	// --------------------------------------------------------------------

	/**
	* Generate CSV from a query result object
	*
	* @access public
	* @param object The query result object
	* @param string The delimiter - tab by default
	* @param string The newline character - \n by default
	* @return string
	*/
	function csv_from_result($query, $delim = "\t", $newline = "\n")
	{
	if ( ! is_object($query) OR ! method_exists($query, 'field_names'))
	{
	show_error('You must submit a valid result object');
	}

	$out = '';

	// First generate the headings from the table column names
	foreach ($query->list_fields() as $name)
	{
	$out .= $name.$delim;
	}

	$out = rtrim($out);
	$out .= $newline;

	// Next blast through the result array and build out the rows
	foreach ($query->result_array() as $row)
	{
	foreach ($row as $item)
	{
	$out .= $item.$delim;
	}
	$out = rtrim($out);
	$out .= $newline;
	}

	return $out;
	}

	// --------------------------------------------------------------------

	/**
	* Generate XML data from a query result object
	*
	* @access public
	* @param object The query result object
	* @param array Any preferences
	* @return string
	*/
	function xml_from_result($query, $params = array())
	{
	if ( ! is_object($query) OR ! method_exists($query, 'field_names'))
	{
	show_error('You must submit a valid result object');
	}

	// Set our default values
	foreach (array('root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t") as $key => $val)
	{
	if ( ! isset($params[$key]))
	{
	$params[$key] = $val;
	}
	}

	// Create variables for convenience
	extract($params);

	// Load the xml helper
	$CI =& get_instance();
	$CI->load->helper('xml');

	// Generate the result
	$xml = "<{$root}>".$newline;
	foreach ($query->result_array() as $row)
	{
	$xml .= $tab."<{$element}>".$newline;

	foreach ($row as $key => $val)
	{
	$xml .= $tab.$tab."<{$key}>".xml_convert($val)."</{$key}>".$newline;
	}
	$xml .= $tab."</{$element}>".$newline;
	}
	$xml .= "</$root>".$newline;

	return $xml;
	}

	// --------------------------------------------------------------------

	/**
	* Database Backup
	*
	* @access public
	* @return void
	*/
	function backup($params = array())
	{
	// If the parameters have not been submitted as an
	// array then we know that it is simply the table
	// name, which is a valid short cut.
	if (is_string($params))
	{
	$params = array('tables' => $params);
	}

	// ------------------------------------------------------

	// Set up our default preferences
	$prefs = array(
	'tables' => array(),
	'ignore' => array(),
	'filename' => '',
	'format' => 'gzip', // gzip, zip, txt
	'add_drop' => TRUE,
	'add_insert' => TRUE,
	'newline' => "\n"
	);

	// Did the user submit any preferences? If so set them....
	if (count($params) > 0)
	{
	foreach ($prefs as $key => $val)
	{
	if (isset($params[$key]))
	{
	$prefs[$key] = $params[$key];
	}
	}
	}

	// ------------------------------------------------------

	// Are we backing up a complete database or individual tables?
	// If no table names were submitted we'll fetch the entire table list
	if (count($prefs['tables']) == 0)
	{
	$prefs['tables'] = $this->db->list_tables();
	}

	// ------------------------------------------------------

	// Validate the format
	if ( ! in_array($prefs['format'], array('gzip', 'zip', 'txt'), TRUE))
	{
	$prefs['format'] = 'txt';
	}

	// ------------------------------------------------------

	// Is the encoder supported? If not, we'll either issue an
	// error or use plain text depending on the debug settings
	if (($prefs['format'] == 'gzip' AND ! @function_exists('gzencode'))
	OR ($prefs['format'] == 'zip' AND ! @function_exists('gzcompress')))
	{
	if ($this->db->db_debug)
	{
	return $this->db->display_error('db_unsuported_compression');
	}

	$prefs['format'] = 'txt';
	}

	// ------------------------------------------------------

	// Set the filename if not provided - Only needed with Zip files
	if ($prefs['filename'] == '' AND $prefs['format'] == 'zip')
	{
	$prefs['filename'] = (count($prefs['tables']) == 1) ? $prefs['tables'] : $this->db->database;
	$prefs['filename'] .= '_'.date('Y-m-d_H-i', time());
	}

	// ------------------------------------------------------

	// Was a Gzip file requested?
	if ($prefs['format'] == 'gzip')
	{
	return gzencode($this->_backup($prefs));
	}

	// ------------------------------------------------------

	// Was a text file requested?
	if ($prefs['format'] == 'txt')
	{
	return $this->_backup($prefs);
	}

	// ------------------------------------------------------

	// Was a Zip file requested?
	if ($prefs['format'] == 'zip')
	{
	// If they included the .zip file extension we'll remove it
	if (preg_match("\|.+?\.zip$\|", $prefs['filename']))
	{
	$prefs['filename'] = str_replace('.zip', '', $prefs['filename']);
	}

	// Tack on the ".sql" file extension if needed
	if ( ! preg_match("\|.+?\.sql$\|", $prefs['filename']))
	{
	$prefs['filename'] .= '.sql';
	}

	// Load the Zip class and output it

	$CI =& get_instance();
	$CI->load->library('zip');
	$CI->zip->add_data($prefs['filename'], $this->_backup($prefs));
	return $CI->zip->get_zip();
	}

	}

	}

	?>