cakephp2-php8/cake/libs/model/dbo/dbo_odbc.php

<?php
/* SVN FILE: $Id$ */

/**
 * ODBC for DBO
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright (c) 2006, Cake Software Foundation, Inc.
 *                     1785 E. Sahara Avenue, Suite 490-204
 *                     Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright    Copyright (c) 2006, Cake Software Foundation, Inc.
 * @link         http://www.cakefoundation.org/projects/info/cakephp CakePHP Project
 * @package      cake
 * @subpackage   cake.cake.libs.model.dbo
 * @since        CakePHP v 0.10.5.1790
 * @version      $Revision$
 * @modifiedby   $LastChangedBy$
 * @lastmodified $Date$
 * @license      http://www.opensource.org/licenses/mit-license.php The MIT License
 */


/**
 * Include DBO.
 */
uses('model'.DS.'datasources'.DS.'dbo_source');

class DboOdbc extends DboSource
{

/**
 * Driver description
 *
 * @var string
 */
    var $description = "ODBC DBO Driver";

/**
 * Table/column starting quote
 *
 * @var string
 */
    var $startQuote = "`";

/**
 * Table/column end quote
 *
 * @var string
 */
    var $endQuote = "`";

/**
 * Driver base configuration
 *
 * @var array
 */
    var $_baseConfig = array('persistent' => true,
                             'login'      => 'root',
                             'password'    => '',
                             'database'    => 'cake');

/**
 * Enter description here...
 *
 * @var unknown_type
 */

    var $columns = array();
    
//    var $columns = array('primary_key' => array('name' => 'int(11) DEFAULT NULL auto_increment'),
//    'string'      => array('name' => 'varchar', 'limit' => '255'),
//    'text'        => array('name' => 'text'),
//    'integer'     => array('name' => 'int', 'limit' => '11'),
//    'float'       => array('name' => 'float'),
//    'datetime'    => array('name' => 'datetime', 'format' => 'Y-m-d h:i:s', 'formatter' => 'date'),
//    'timestamp'   => array('name' => 'datetime', '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'));

/**
 * 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;
        $this->connection = $connect($config['database'], $config['login'], $config['password']);

        if ($this->connection)
        {
            $this->connected = true;
        }

        return $this->connected;
    }

/**
 * Disconnects from database.
 *
 * @return boolean True if the database could be disconnected, else false
 */
    function disconnect ()
    {
        return @odbc_close($this->connection);
    }

/**
 * Executes given SQL statement.
 *
 * @param string $sql SQL statement
 * @return resource Result resource identifier
 * @access protected
 */
    function _execute ($sql)
    {
        return odbc_exec($this->connection, $sql);
    }

/**
 * Returns a row from given resultset as an array .
 *
 * @param bool $assoc Associative array only, or both?
 * @return array The fetched row as an array
 */
    function fetchRow ($assoc = false)
    {
        if(is_resource($this->_result))
        {
            $this->resultSet($this->_result);
            $resultRow = $this->fetchResult();
            return $resultRow;
        }
        else
        {
            return null;
        }
    }

/**
 * Returns an array of sources (tables) in the database.
 *
 * @return array Array of tablenames in the database
 */
    function listSources ()
    {
        $result = odbc_tables($this->connection);
        if (!$result)
        {
            return array();
        }
        else
        {
            $tables = array();
            while ($line = odbc_fetch_array($result))
            {
                $tables[] = strtolower($line['TABLE_NAME']);
            }
            return $tables;
        }
    }

/**
 * Returns an array of the fields in given table name.
 *
 * @param Model $model Model object to describe
 * @return array Fields in table. Keys are name and type
 */
    function &describe (&$model)
    {
        $cache = parent::describe($model);
        if ($cache != null)
        {
            return $cache;
        }

        $fields = array();
        $sql = 'SELECT * FROM ' . $this->name($model->table) . ' LIMIT 1';
        $result = odbc_exec($this->connection, $sql);

        $count = odbc_num_fields($result);   

        for ($i = 1; $i <= $count; $i++)
        {
            $cols[$i - 1] = odbc_field_name($result, $i);
        }

        foreach ($cols as $column)
        {
            $type = odbc_field_type(odbc_exec($this->connection,"SELECT " . $column . " FROM " . $model->table), 1);
            array_push($fields, array('name' => $column, 'type' => $type));
        }

        $this->__cacheDescription($model->table, $fields);
        return $fields;
    }
        

    function name ($data)
    {
        if ($data == '*')
        {
            return '*';
        }
         $pos = strpos($data, '`');
        if ($pos === false)
        {
            $data = '' . str_replace('.', '.', $data) .'';
            //$data = '`'. str_replace('.', '`.`', $data) .'`';
        }
        return $data;
    }

/**
 * 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 $column The column into which this data will be inserted
 * @return string Quoted and escaped
 * @todo Add logic that formats/escapes data based on column type
 */
    function value ($data, $column = null)
    {
        $parent = parent::value($data, $column);
        if ($parent != null)
        {
            return $parent;
        }
        if ($data === null)
        {
            return 'NULL';
        }
        if (ini_get('magic_quotes_gpc') == 1)
        {
            $data = stripslashes($data);
        }
        // $data = mysql_real_escape_string($data, $this->connection);

        if(!is_numeric($data))
        {
            $return = "'" . $data . "'";
        }
        else
        {
            $return = $data;
        }
        return $return;
    }

/**
 * Not sure about this one, MySQL needs it but does ODBC?  Safer just to leave it
 * Translates between PHP boolean values and MySQL (faked) boolean values
 *  
 * @param mixed $data Value to be translated
 * @return mixed Converted boolean value
 */
    function boolean ($data)
    {
        if ($data === true || $data === false)
        {
            if ($data === true)
            {
                return 1;
            }
            return 0;
        }
        else
        {
            if (intval($data !== 0))
            {
                return true;
            }
            return false;
        }
    }

/**
 * Begin a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions).
 */
    function begin (&$model)
    {
        if (parent::begin($model))
        {
            if (odbc_autocommit($this->connection, false))
            {
                $this->__transactionStarted = true;
                return true;
            }
        }
        return false;
    }

/**
 * Commit a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions,
 * or a transaction has not started).
 */
    function commit (&$model)
    {
        if (parent::commit($model))
        {
            if (odbc_commit($this->connection))
            {
                $this->__transactionStarted = false;
                return true;
            }
        }
        return false;
    }

/**
 * Rollback a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions,
 * or a transaction has not started).
 */
    function rollback (&$model)
    {
        if (parent::rollback($model))
        {
            $this->__transactionStarted = false;
            return odbc_rollback($this->connection);
        }
        return false;
    }

/**
 * Returns a formatted error message from previous database operation.
 *
 * @return string Error message with error number
 */
    function lastError ()
    {
        if (odbc_error($this->connection))
        {
            return odbc_error($this->connection).': '.odbc_errormsg($this->connection);
        }
        return null;
    }

/**
 * Returns number of affected rows in previous database operation. If no previous operation exists,
 * this returns false.
 *
 * @return int Number of affected rows
 */
    function lastAffected ()
    {
        if ($this->_result)
        {
            return null;
        }
        return null;
    }

/**
 * Returns number of rows in previous resultset. If no previous resultset exists,
 * this returns false.
 *
 * @return int Number of rows in resultset
 */
    function lastNumRows ()
    {
        if ($this->_result)
        {
            return @odbc_num_rows($this->_result);
        }
        return null;
    }

/**
 * Returns the ID generated from the previous INSERT operation.
 *
 * @param unknown_type $source
 * @return int
 */
    function lastInsertId ($source = null)
    {
        $result = $this->fetchAll('SELECT @@IDENTITY');
        return $result[0];
    }

/**
 * Enter description here...
 *
 * @param string $real Real database-layer column type (i.e. "varchar(255)")
 */
    function column($real)
    {
        if (is_array($real))
        {
            $col = $real['name'];
            if (isset($real['limit']))
            {
                $col .= '('.$real['limit'].')';
            }
            return $col;
        }

        return $real;
    }

/**
 * Enter description here...
 *
 * @param unknown_type $results
 */
    function resultSet(&$results)
    {
        $this->results =& $results;
        $this->map = array();
        $num_fields = odbc_num_fields($results);
        $index = 0;
        $j = 0;

        while ($j < $num_fields)
        {
            $column = odbc_fetch_array($results,$j);
            if (!empty($column->table))
            {
                $this->map[$index++] = array($column->table, $column->name);
            }
            else
            {
                echo array(0, $column->name);
                $this->map[$index++] = array(0, $column->name);
            }
            $j++;
        }
    }

/**
 * Fetches the next row from the current result set
 *
 * @return unknown
 */
    function fetchResult()
    {
        if ($row = odbc_fetch_row($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;
        }
    }

    function buildSchemaQuery($schema)
    {
        $search  = array('{AUTOINCREMENT}', '{PRIMARY}', '{UNSIGNED}', '{FULLTEXT}',
        '{FULLTEXT_MYSQL}', '{BOOLEAN}', '{UTF_8}');
        $replace = array('int(11) not null auto_increment', 'primary key', 'unsigned',
        'FULLTEXT', 'FULLTEXT', 'enum (\'true\', \'false\') NOT NULL default \'true\'',
        '/*!40100 CHARACTER SET utf8 COLLATE utf8_unicode_ci */');
        $query = trim(str_replace($search, $replace, $schema));
        return $query;
    }
}
?>