Subversion-Projekte lars-tiefland.cakephp

<?php

/* SVN FILE: $Id: dbo_mysql.php 7945 2008-12-19 02:16:01Z gwoo $ */

/**

 * MySQL layer for DBO

 *

 * Long description for file

 *

 * PHP versions 4 and 5

 *

 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)

 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)

 *

 * Licensed under The MIT License

 * Redistributions of files must retain the above copyright notice.

 *

 * @filesource

 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)

 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project

 * @package       cake

 * @subpackage    cake.cake.libs.model.datasources.dbo

 * @since         CakePHP(tm) v 0.10.5.1790

 * @version       $Revision: 7945 $

 * @modifiedby    $LastChangedBy: gwoo $

 * @lastmodified  $Date: 2008-12-18 18:16:01 -0800 (Thu, 18 Dec 2008) $

 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License

 */

/**

 * Provides common base for MySQL & MySQLi connections

 *

 * @package       cake

 * @subpackage    cake.cake.libs.model.datasources.dbo

 */

class DboMysqlBase extends DboSource {

/**

 * Description property.

 *

 * @var string

 */

	var $description = "MySQL DBO Base Driver";

/**

 * Start quote

 *

 * @var string

 */

	var $startQuote = "`";

/**

 * End quote

 *

 * @var string

 */

	var $endQuote = "`";

/**

 * use alias for update and delete. Set to true if version >= 4.1

 *

 * @var boolean

 * @access protected

 */

	var $_useAlias = true;

/**

 * Index of basic SQL commands

 *

 * @var array

 * @access protected

 */

	var $_commands = array(

		'begin'    => 'START TRANSACTION',

		'commit'   => 'COMMIT',

		'rollback' => 'ROLLBACK'

	);

/**

 * MySQL column definition

 *

 * @var array

 */

	var $columns = array(

		'primary_key' => array('name' => 'NOT NULL AUTO_INCREMENT'),

		'string' => array('name' => 'varchar', 'limit' => '255'),

		'text' => array('name' => 'text'),

		'integer' => array('name' => 'int', 'limit' => '11', 'formatter' => 'intval'),

		'float' => array('name' => 'float', 'formatter' => 'floatval'),

		'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),

		'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),

		'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),

		'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),

		'binary' => array('name' => 'blob'),

		'boolean' => array('name' => 'tinyint', 'limit' => '1')

	);

/**

 * Generates and executes an SQL UPDATE statement for given model, fields, and values.

 *

 * @param Model $model

 * @param array $fields

 * @param array $values

 * @param mixed $conditions

 * @return array

 */

	function update(&$model, $fields = array(), $values = null, $conditions = null) {

		if (!$this->_useAlias) {

			return parent::update($model, $fields, $values, $conditions);

		}

		if ($values == null) {

			$combined = $fields;

		} else {

			$combined = array_combine($fields, $values);

		}

		$alias = $joins = false;

		$fields = $this->_prepareUpdateFields($model, $combined, empty($conditions), !empty($conditions));

		$fields = join(', ', $fields);

		$table = $this->fullTableName($model);

		if (!empty($conditions)) {

			$alias = $this->name($model->alias);

			if ($model->name == $model->alias) {

				$joins = implode(' ', $this->_getJoins($model));

			}

		}

		$conditions = $this->conditions($this->defaultConditions($model, $conditions, $alias), true, true, $model);

		if ($conditions === false) {

			return false;

		}

		if (!$this->execute($this->renderStatement('update', compact('table', 'alias', 'joins', 'fields', 'conditions')))) {

			$model->onError();

			return false;

		}

		return true;

	}

/**

 * Generates and executes an SQL DELETE statement for given id/conditions on given model.

 *

 * @param Model $model

 * @param mixed $conditions

 * @return boolean Success

 */

	function delete(&$model, $conditions = null) {

		if (!$this->_useAlias) {

			return parent::delete($model, $conditions);

		}

		$alias = $this->name($model->alias);

		$table = $this->fullTableName($model);

		$joins = implode(' ', $this->_getJoins($model));

		if (empty($conditions)) {

			$alias = $joins = false;

		}

		$conditions = $this->conditions($this->defaultConditions($model, $conditions, $alias), true, true, $model);

		if ($conditions === false) {

			return false;

		}

		if ($this->execute($this->renderStatement('delete', compact('alias', 'table', 'joins', 'conditions'))) === false) {

			$model->onError();

			return false;

		}

		return true;

	}

/**

 * Sets the database encoding

 *

 * @param string $enc Database encoding

 */

	function setEncoding($enc) {

		return $this->_execute('SET NAMES ' . $enc) != false;

	}

/**

 * Returns an array of the indexes in given datasource name.

 *

 * @param string $model Name of model to inspect

 * @return array Fields in table. Keys are column and unique

 */

	function index($model) {

		$index = array();

		$table = $this->fullTableName($model);

		if ($table) {

			$indexes = $this->query('SHOW INDEX FROM ' . $table);

			$keys = Set::extract($indexes, '{n}.STATISTICS');

			foreach ($keys as $i => $key) {

				if (!isset($index[$key['Key_name']])) {

					$col = array();

					$index[$key['Key_name']]['column'] = $key['Column_name'];

					$index[$key['Key_name']]['unique'] = intval($key['Non_unique'] == 0);

				} else {

					if (!is_array($index[$key['Key_name']]['column'])) {

						$col[] = $index[$key['Key_name']]['column'];

					}

					$col[] = $key['Column_name'];

					$index[$key['Key_name']]['column'] = $col;

				}

			}

		}

		return $index;

	}

/**

 * Generate a MySQL Alter Table syntax for the given Schema comparison

 *

 * @param array $compare Result of a CakeSchema::compare()

 * @return array Array of alter statements to make.

 */

	function alterSchema($compare, $table = null) {

		if (!is_array($compare)) {

			return false;

		}

		$out = '';

		$colList = array();

		foreach ($compare as $curTable => $types) {

			$indexes = array();

			if (!$table || $table == $curTable) {

				$out .= 'ALTER TABLE ' . $this->fullTableName($curTable) . " \n";

				foreach ($types as $type => $column) {

					if (isset($column['indexes'])) {

						$indexes[$type] = $column['indexes'];

						unset($column['indexes']);

					}

					switch ($type) {

						case 'add':

							foreach ($column as $field => $col) {

								$col['name'] = $field;

								$alter = 'ADD '.$this->buildColumn($col);

								if (isset($col['after'])) {

									$alter .= ' AFTER '. $this->name($col['after']);

								}

								$colList[] = $alter;

							}

						break;

						case 'drop':

							foreach ($column as $field => $col) {

								$col['name'] = $field;

								$colList[] = 'DROP '.$this->name($field);

							}

						break;

						case 'change':

							foreach ($column as $field => $col) {

								if (!isset($col['name'])) {

									$col['name'] = $field;

								}

								$colList[] = 'CHANGE '. $this->name($field).' '.$this->buildColumn($col);

							}

						break;

					}

				}

				$colList = array_merge($colList, $this->_alterIndexes($curTable, $indexes));

				$out .= "\t" . join(",\n\t", $colList) . ";\n\n";

			}

		}

		return $out;

	}

/**

 * Generate a MySQL "drop table" statement for the given Schema object

 *

 * @param object $schema An instance of a subclass of CakeSchema

 * @param string $table Optional.  If specified only the table name given will be generated.

 *                      Otherwise, all tables defined in the schema are generated.

 * @return string

 */

	function dropSchema($schema, $table = null) {

		if (!is_a($schema, 'CakeSchema')) {

			trigger_error(__('Invalid schema object', true), E_USER_WARNING);

			return null;

		}

		$out = '';

		foreach ($schema->tables as $curTable => $columns) {

			if (!$table || $table == $curTable) {

				$out .= 'DROP TABLE IF EXISTS ' . $this->fullTableName($curTable) . ";\n";

			}

		}

		return $out;

	}

/**

 * Generate MySQL index alteration statements for a table.

 *

 * @param string $table Table to alter indexes for

 * @param array $new Indexes to add and drop

 * @return array Index alteration statements

 */

	function _alterIndexes($table, $indexes) {

		$alter = array();

		if (isset($indexes['drop'])) {

			foreach($indexes['drop'] as $name => $value) {

				$out = 'DROP ';

				if ($name == 'PRIMARY') {

					$out .= 'PRIMARY KEY';

				} else {

					$out .= 'KEY ' . $name;

				}

				$alter[] = $out;

			}

		}

		if (isset($indexes['add'])) {

			foreach ($indexes['add'] as $name => $value) {

				$out = 'ADD ';

				if ($name == 'PRIMARY') {

					$out .= 'PRIMARY ';

					$name = null;

				} else {

					if (!empty($value['unique'])) {

						$out .= 'UNIQUE ';

					}

				}

				if (is_array($value['column'])) {

					$out .= 'KEY '. $name .' (' . join(', ', array_map(array(&$this, 'name'), $value['column'])) . ')';

				} else {

					$out .= 'KEY '. $name .' (' . $this->name($value['column']) . ')';

				}

				$alter[] = $out;

			}

		}

		return $alter;

	}

/**

 * Inserts multiple values into a table

 *

 * @param string $table

 * @param string $fields

 * @param array $values

 */

	function insertMulti($table, $fields, $values) {

		$table = $this->fullTableName($table);

		if (is_array($fields)) {

			$fields = join(', ', array_map(array(&$this, 'name'), $fields));

		}

		$values = implode(', ', $values);

		$this->query("INSERT INTO {$table} ({$fields}) VALUES {$values}");

	}

}

/**

 * MySQL DBO driver object

 *

 * Provides connection and SQL generation for MySQL RDMS

 *

 * @package       cake

 * @subpackage    cake.cake.libs.model.datasources.dbo

 */

class DboMysql extends DboMysqlBase {

/**

 * Enter description here...

 *

 * @var unknown_type

 */

	var $description = "MySQL DBO Driver";

/**

 * Base configuration settings for MySQL driver

 *

 * @var array

 */

	var $_baseConfig = array(

		'persistent' => true,

		'host' => 'localhost',

		'login' => 'root',

		'password' => '',

		'database' => 'cake',

		'port' => '3306',

		'connect' => 'mysql_pconnect'

	);

/**

 * Connects to the database using options in the given configuration array.

 *

 * @return boolean True if the database could be connected, else false

 */

	function connect() {

		$config = $this->config;

		$connect = $config['connect'];

		$this->connected = false;

		if (!$config['persistent']) {

			$this->connection = mysql_connect($config['host'] . ':' . $config['port'], $config['login'], $config['password'], true);

		} else {

			$this->connection = $connect($config['host'] . ':' . $config['port'], $config['login'], $config['password']);

		}

		if (mysql_select_db($config['database'], $this->connection)) {

			$this->connected = true;

		}

		if (isset($config['encoding']) && !empty($config['encoding'])) {

			$this->setEncoding($config['encoding']);

		}

		$this->_useAlias = (bool)version_compare(mysql_get_server_info($this->connection), "4.1", ">=");

		return $this->connected;

	}

/**

 * Disconnects from database.

 *

 * @return boolean True if the database could be disconnected, else false

 */

	function disconnect() {

		if (isset($this->results) && is_resource($this->results)) {

			mysql_free_result($this->results);

		}

		$this->connected = !@mysql_close($this->connection);

		return !$this->connected;

	}

/**

 * Executes given SQL statement.

 *

 * @param string $sql SQL statement

 * @return resource Result resource identifier

 * @access protected

 */

	function _execute($sql) {

		return mysql_query($sql, $this->connection);

	}

/**

 * Returns an array of sources (tables) in the database.

 *

 * @return array Array of tablenames in the database

 */

	function listSources() {

		$cache = parent::listSources();

		if ($cache != null) {

			return $cache;

		}

		$result = $this->_execute('SHOW TABLES FROM ' . $this->name($this->config['database']) . ';');

		if (!$result) {

			return array();

		} else {

			$tables = array();

			while ($line = mysql_fetch_array($result)) {

				$tables[] = $line[0];

			}

			parent::listSources($tables);

			return $tables;

		}

	}

/**

 * Returns an array of the fields in given table name.

 *

 * @param string $tableName Name of database table to inspect

 * @return array Fields in table. Keys are name and type

 */

	function describe(&$model) {

		$cache = parent::describe($model);

		if ($cache != null) {

			return $cache;

		}

		$fields = false;

		$cols = $this->query('DESCRIBE ' . $this->fullTableName($model));

		foreach ($cols as $column) {

			$colKey = array_keys($column);

			if (isset($column[$colKey[0]]) && !isset($column[0])) {

				$column[0] = $column[$colKey[0]];

			}

			if (isset($column[0])) {

				$fields[$column[0]['Field']] = array(

					'type'		=> $this->column($column[0]['Type']),

					'null'		=> ($column[0]['Null'] == 'YES' ? true : false),

					'default'	=> $column[0]['Default'],

					'length'	=> $this->length($column[0]['Type']),

				);

				if (!empty($column[0]['Key']) && isset($this->index[$column[0]['Key']])) {

					$fields[$column[0]['Field']]['key']	= $this->index[$column[0]['Key']];

				}

			}

		}

		$this->__cacheDescription($this->fullTableName($model, false), $fields);

		return $fields;

	}

/**

 * Returns a quoted and escaped string of $data for use in an SQL statement.

 *

 * @param string $data String to be prepared for use in an SQL statement

 * @param string $column The column into which this data will be inserted

 * @param boolean $safe Whether or not numeric data should be handled automagically if no column data is provided

 * @return string Quoted and escaped data

 */

	function value($data, $column = null, $safe = false) {

		$parent = parent::value($data, $column, $safe);

		if ($parent != null) {

			return $parent;

		} elseif ($data === null || (is_array($data) && empty($data))) {

			return 'NULL';

		} elseif ($data === '' && $column !== 'integer' && $column !== 'float' && $column !== 'boolean') {

			return  "''";

		}

		if (empty($column)) {

			$column = $this->introspectType($data);

		}

		switch ($column) {

			case 'boolean':

				return $this->boolean((bool)$data);

			break;

			case 'integer':

			case 'float':

				if ($data === '') {

					return 'NULL';

				}

				if ((is_int($data) || is_float($data) || $data === '0') || (

					is_numeric($data) && strpos($data, ',') === false &&

					$data[0] != '0' && strpos($data, 'e') === false)) {

						return $data;

					}

			default:

				$data = "'" . mysql_real_escape_string($data, $this->connection) . "'";

			break;

		}

		return $data;

	}

/**

 * Returns a formatted error message from previous database operation.

 *

 * @return string Error message with error number

 */

	function lastError() {

		if (mysql_errno($this->connection)) {

			return mysql_errno($this->connection).': '.mysql_error($this->connection);

		}

		return null;

	}

/**

 * Returns number of affected rows in previous database operation. If no previous operation exists,

 * this returns false.

 *

 * @return integer Number of affected rows

 */

	function lastAffected() {

		if ($this->_result) {

			return mysql_affected_rows($this->connection);

		}

		return null;

	}

/**

 * Returns number of rows in previous resultset. If no previous resultset exists,

 * this returns false.

 *

 * @return integer Number of rows in resultset

 */

	function lastNumRows() {

		if ($this->hasResult()) {

			return mysql_num_rows($this->_result);

		}

		return null;

	}

/**

 * Returns the ID generated from the previous INSERT operation.

 *

 * @param unknown_type $source

 * @return in

 */

	function lastInsertId($source = null) {

		$id = $this->fetchRow('SELECT LAST_INSERT_ID() AS insertID', false);

		if ($id !== false && !empty($id) && !empty($id[0]) && isset($id[0]['insertID'])) {

			return $id[0]['insertID'];

		}

		return null;

	}

/**

 * Converts database-layer column types to basic types

 *

 * @param string $real Real database-layer column type (i.e. "varchar(255)")

 * @return string Abstract column type (i.e. "string")

 */

	function column($real) {

		if (is_array($real)) {

			$col = $real['name'];

			if (isset($real['limit'])) {

				$col .= '('.$real['limit'].')';

			}

			return $col;

		}

		$col = str_replace(')', '', $real);

		$limit = $this->length($real);

		if (strpos($col, '(') !== false) {

			list($col, $vals) = explode('(', $col);

		}

		if (in_array($col, array('date', 'time', 'datetime', 'timestamp'))) {

			return $col;

		}

		if (($col == 'tinyint' && $limit == 1) || $col == 'boolean') {

			return 'boolean';

		}

		if (strpos($col, 'int') !== false) {

			return 'integer';

		}

		if (strpos($col, 'char') !== false || $col == 'tinytext') {

			return 'string';

		}

		if (strpos($col, 'text') !== false) {

			return 'text';

		}

		if (strpos($col, 'blob') !== false || $col == 'binary') {

			return 'binary';

		}

		if (strpos($col, 'float') !== false || strpos($col, 'double') !== false || strpos($col, 'decimal') !== false) {

			return 'float';

		}

		if (strpos($col, 'enum') !== false) {

			return "enum($vals)";

		}

		return 'text';

	}

/**

 * Enter description here...

 *

 * @param unknown_type $results

 */

	function resultSet(&$results) {

		if (isset($this->results) && is_resource($this->results) && $this->results != $results) {

			mysql_free_result($this->results);

		}

		$this->results =& $results;

		$this->map = array();

		$numFields = mysql_num_fields($results);

		$index = 0;

		$j = 0;

		while ($j < $numFields) {

			$column = mysql_fetch_field($results,$j);

			if (!empty($column->table)) {

				$this->map[$index++] = array($column->table, $column->name);

			} else {

				$this->map[$index++] = array(0, $column->name);

			}

			$j++;

		}

	}

/**

 * Fetches the next row from the current result set

 *

 * @return unknown

 */

	function fetchResult() {

		if ($row = mysql_fetch_row($this->results)) {

			$resultRow = array();

			$i = 0;

			foreach ($row as $index => $field) {

				list($table, $column) = $this->map[$index];

				$resultRow[$table][$column] = $row[$index];

				$i++;

			}

			return $resultRow;

		} else {

			return false;

		}

	}

/**

 * Gets the database encoding

 *

 * @return string The database encoding

 */

	function getEncoding() {

		return mysql_client_encoding($this->connection);

	}

}

?>