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dbo_adodb.php

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<?php
/* SVN FILE: $Id: dbo__adodb_8php-source.html 580 2008-07-01 14:45:49Z gwoo $ */

/**
 * AdoDB 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.
 *                              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 2005-2008, Cake Software Foundation, Inc.
 * @link                http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package         cake
 * @subpackage      cake.cake.libs.model.datasources.dbo
 * @since           CakePHP(tm) v 0.2.9
 * @version         $Revision: 580 $
 * @modifiedby      $LastChangedBy: gwoo $
 * @lastmodified    $Date: 2008-07-01 09:45:49 -0500 (Tue, 01 Jul 2008) $
 * @license         http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Include AdoDB files.
 */
App::import('Vendor', 'NewADOConnection', array('file' => 'adodb' . DS . 'adodb.inc.php'));

/**
 * AdoDB DBO implementation.
 *
 * Database abstraction implementation for the AdoDB library.
 *
 * @package     cake
 * @subpackage  cake.cake.libs.model.datasources.dbo
 */
class DboAdodb extends DboSource {
/**
 * Enter description here...
 *
 * @var string
 */
    var $description = "ADOdb DBO Driver";
/**
 * ADOConnection object with which we connect.
 *
 * @var ADOConnection The connection object.
 * @access private
 */
    var $_adodb = null;
/**
 * Array translating ADOdb column MetaTypes to cake-supported metatypes
 *
 * @var array
 * @access private
 */
    var $_adodbColumnTypes = array(
        'string' => 'C',
        'text' => 'X',
        'date' => 'D',
        'timestamp' => 'T',
        'time' => 'T',
        'datetime' => 'T',
        'boolean' => 'L',
        'float' => 'N',
        'integer' => 'I',
        'binary' => 'R',
    );
/**
 * ADOdb column definition
 *
 * @var array
 */
    var $columns = array(
        'primary_key' => array('name' => 'R', 'limit' => 11),
        'string' => array('name' => 'C', 'limit' => '255'),
        'text' => array('name' => 'X'),
        'integer' => array('name' => 'I', 'limit' => '11', 'formatter' => 'intval'),
        'float' => array('name' => 'N', 'formatter' => 'floatval'),
        'timestamp' => array('name' => 'T', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
        'time' => array('name' => 'T',  'format' => 'H:i:s', 'formatter' => 'date'),
        'datetime' => array('name' => 'T', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
        'date' => array('name' => 'D', 'format' => 'Y-m-d', 'formatter' => 'date'),
        'binary' => array('name' => 'B'),
        'boolean' => array('name' => 'L', 'limit' => '1')
    );
/**
 * Connects to the database using options in the given configuration array.
 *
 * @param array $config Configuration array for connecting
 */
    function connect() {
        $config = $this->config;
        $persistent = strrpos($config['connect'], '|p');

        if ($persistent === false) {
            $adodb_driver = $config['connect'];
            $connect = 'Connect';
        } else {
            $adodb_driver = substr($config['connect'], 0, $persistent);
            $connect = 'PConnect';
        }

        $this->_adodb = NewADOConnection($adodb_driver);

        $this->_adodbDataDict = NewDataDictionary($this->_adodb, $adodb_driver);

        $this->startQuote = $this->_adodb->nameQuote;
        $this->endQuote = $this->_adodb->nameQuote;

        $this->connected = $this->_adodb->$connect($config['host'], $config['login'], $config['password'], $config['database']);
        $this->_adodbMetatyper = &$this->_adodb->execute('Select 1');
        return $this->connected;
    }
/**
 * Disconnects from database.
 *
 * @return boolean True if the database could be disconnected, else false
 */
    function disconnect() {
        return $this->_adodb->Close();
    }
/**
 * Executes given SQL statement.
 *
 * @param string $sql SQL statement
 * @return resource Result resource identifier
 */
    function _execute($sql) {
        global $ADODB_FETCH_MODE;
        $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
        return $this->_adodb->execute($sql);
    }
/**
 * Returns a row from given resultset as an array .
 *
 * @return array The fetched row as an array
 */
/**
 * Returns a row from current resultset as an array .
 *
 * @return array The fetched row as an array
 */
    function fetchRow($sql = null) {

        if (!empty($sql) && is_string($sql) && strlen($sql) > 5) {
            if (!$this->execute($sql)) {
                return null;
            }
        }

        if (!$this->hasResult()) {
            return null;
        } else {
            $resultRow = $this->_result->FetchRow();
            $this->resultSet($resultRow);
            return $this->fetchResult();
        }
    }
/**
 * 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($model)) {
            if ($this->_adodb->BeginTrans()) {
                $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)) {
            $this->_transactionStarted = false;
            return $this->_adodb->CommitTrans();
        }
        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)) {
            return $this->_adodb->RollbackTrans();
        }
        return false;
    }
/**
 * Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
 *
 * @return array Array of tablenames in the database
 */
    function listSources() {
        $tables = $this->_adodb->MetaTables('TABLES');

        if (!sizeof($tables) > 0) {
            trigger_error(ERROR_NO_TABLE_LIST, E_USER_NOTICE);
            exit;
        }
        return $tables;
    }
/**
 * Returns an array of the fields in the table used by the given model.
 *
 * @param AppModel $model Model object
 * @return array Fields in table. Keys are name and type
 */
    function describe(&$model) {
        $cache = parent::describe($model);
        if ($cache != null) {
            return $cache;
        }

        $fields = false;
        $cols = $this->_adodb->MetaColumns($this->fullTableName($model, false));

        foreach ($cols as $column) {
            $fields[$column->name] = array(
                                        'type' => $this->column($column->type),
                                        'null' => !$column->not_null,
                                        'length' => $column->max_length,
                                    );
            if ($column->has_default) {
                $fields[$column->name]['default'] = $column->default_value;
            }
            if ($column->primary_key == 1) {
                $fields[$column->name]['key'] = 'primary';
            }
        }

        $this->__cacheDescription($this->fullTableName($model, false), $fields);
        return $fields;
    }
/**
 * Returns a formatted error message from previous database operation.
 *
 * @return string Error message
 */
    function lastError() {
        return $this->_adodb->ErrorMsg();
    }
/**
 * Returns number of affected rows in previous database operation, or false if no previous operation exists.
 *
 * @return integer Number of affected rows
 */
    function lastAffected() {
        return $this->_adodb->Affected_Rows();
    }
/**
 * Returns number of rows in previous resultset, or false if no previous resultset exists.
 *
 * @return integer Number of rows in resultset
 */
    function lastNumRows() {
        return $this->_result ? $this->_result->RecordCount() : false;
    }
/**
 * Returns the ID generated from the previous INSERT operation.
 *
 * @return int
 *
 * @Returns the last autonumbering ID inserted. Returns false if function not supported.
 */
    function lastInsertId() {
        return $this->_adodb->Insert_ID();
    }
/**
 * Returns a LIMIT statement in the correct format for the particular database.
 *
 * @param integer $limit Limit of results returned
 * @param integer $offset Offset from which to start results
 * @return string SQL limit/offset statement
 * @todo Please change output string to whatever select your database accepts. adodb doesn't allow us to get the correct limit string out of it.
 */
    function limit($limit, $offset = null) {
        if ($limit) {
            $rt = '';
            if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
                $rt = ' LIMIT';
            }

            if ($offset) {
                $rt .= ' ' . $offset . ',';
            }

            $rt .= ' ' . $limit;
            return $rt;
        }
        return null;
        // please change to whatever select your database accepts
        // adodb doesn't allow us to get the correct limit string out of it
    }
/**
 * 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) {
        $metaTypes = array_flip($this->_adodbColumnTypes);

        $interpreted_type = $this->_adodbMetatyper->MetaType($real);

        if (!isset($metaTypes[$interpreted_type])) {
            return 'text';
        }
        return $metaTypes[$interpreted_type];
    }
/**
 * 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_type The type of 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;
        }

        if ($data === null) {
            return 'NULL';
        }

        if ($data === '') {
            return "''";
        }
        return $this->_adodb->qstr($data);
    }

/**
 * Generates the fields list of an SQL query.
 *
 * @param Model $model
 * @param string $alias Alias tablename
 * @param mixed $fields
 * @return array
 */
    function fields(&$model, $alias = null, $fields = array(), $quote = true) {
        if (empty($alias)) {
            $alias = $model->alias;
        }
        $fields = parent::fields($model, $alias, $fields, false);

        if (!$quote) {
            return $fields;
        }
        $count = count($fields);

        if ($count >= 1 && $fields[0] != '*' && strpos($fields[0], 'COUNT(*)') === false) {
            for ($i = 0; $i < $count; $i++) {
                if (!preg_match('/^.+\\(.*\\)/', $fields[$i]) && !preg_match('/\s+AS\s+/', $fields[$i])) {
                    $prepend = '';
                    if (strpos($fields[$i], 'DISTINCT') !== false) {
                        $prepend = 'DISTINCT ';
                        $fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
                    }

                    if (strrpos($fields[$i], '.') === false) {
                        $fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '__' . $fields[$i]);
                    } else {
                        $build = explode('.', $fields[$i]);
                        $fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '__' . $build[1]);
                    }
                }
            }
        }
        return $fields;
    }
/**
 * Build ResultSets and map data
 *
 * @param array $results
 */
    function resultSet(&$results) {
        $num_fields = count($results);
        $fields = array_keys($results);
        $this->results =& $results;
        $this->map = array();
        $index = 0;
        $j = 0;

        while ($j < $num_fields) {
            $columnName = $fields[$j];

            if (strpos($columnName, '__')) {
                $parts = explode('__', $columnName);
                $this->map[$index++] = array($parts[0], $parts[1]);
            } else {
                $this->map[$index++] = array(0, $columnName);
            }
            $j++;
        }
    }
/**
 * Fetches the next row from the current result set
 *
 * @return unknown
 */
    function fetchResult() {
        if (!empty($this->results) && $row = $this->results) {
            $resultRow = array();
            $fields = array_keys($row);
            $count = count($fields);
            $i = 0;
            for ($i = 0; $i < $count; $i++) { //$row as $index => $field) {
                list($table, $column) = $this->map[$i];
                $resultRow[$table][$column] = $row[$fields[$i]];
            }
            return $resultRow;
        } else {
            return false;
        }
    }

/**
 * Generate a database-native column schema string
 *
 * @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
 *                      where options can be 'default', 'length', or 'key'.
 * @return string
 */
    function buildColumn($column) {
        $name = $type = null;
        extract(array_merge(array('null' => true), $column));

        if (empty($name) || empty($type)) {
            trigger_error('Column name or type not defined in schema', E_USER_WARNING);
            return null;
        }

        //$metaTypes = array_flip($this->_adodbColumnTypes);
        if (!isset($this->_adodbColumnTypes[$type])) {
            trigger_error("Column type {$type} does not exist", E_USER_WARNING);
            return null;
        }
        $metaType = $this->_adodbColumnTypes[$type];
        $concreteType = $this->_adodbDataDict->ActualType($metaType);
        $real = $this->columns[$type];

        //UUIDs are broken so fix them.
        if ($type == 'string' && isset($real['length']) && $real['length'] == 36) {
            $concreteType = 'CHAR';
        }

        $out = $this->name($name) . ' ' . $concreteType;

        if (isset($real['limit']) || isset($real['length']) || isset($column['limit']) || isset($column['length'])) {
            if (isset($column['length'])) {
                $length = $column['length'];
            } elseif (isset($column['limit'])) {
                $length = $column['limit'];
            } elseif (isset($real['length'])) {
                $length = $real['length'];
            } else {
                $length = $real['limit'];
            }
            $out .= '(' . $length . ')';
        }
        $_notNull = $_default = $_autoInc = $_constraint = $_unsigned = false;

        if (isset($column['key']) && $column['key'] == 'primary' && $type == 'integer') {
            $_constraint = '';
            $_autoInc = true;
        } elseif (isset($column['key']) && $column['key'] == 'primary') {
            $_notNull = '';
        } elseif (isset($column['default']) && isset($column['null']) && $column['null'] == false) {
            $_notNull = true;
            $_default = $column['default'];
        } elseif ( isset($column['null']) && $column['null'] == true) {
            $_notNull = false;
            $_default = 'NULL';
        }
        if (isset($column['default']) && $_default == false) {
            $_default = $this->value($column['default']);
        }
        if (isset($column['null']) && $column['null'] == false) {
            $_notNull = true;
        }
        //use concrete instance of DataDict to make the suffixes for us.
        $out .= $this->_adodbDataDict->_CreateSuffix($out, $metaType, $_notNull, $_default, $_autoInc, $_constraint, $_unsigned);
        return $out;

    }
/**
 * Checks if the result is valid
 *
 * @return boolean True if the result is valid, else false
 */
    function hasResult() {
        return is_object($this->_result) && !$this->_result->EOF;
    }
}
?>

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