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dbo_adodb.php

<?php
/* SVN FILE: $Id: dbo_adodb.php 4717 2007-03-31 17:26:16Z phpnut $ */

/**
 * AdoDB layer for DBO.
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2007, 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 2005-2007, Cake Software Foundation, Inc.
 * @link                      http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package             cake
 * @subpackage          cake.cake.libs.model.dbo
 * @since               CakePHP(tm) v 0.2.9
 * @version             $Revision: 4717 $
 * @modifiedby          $LastChangedBy: phpnut $
 * @lastmodified  $Date: 2007-03-31 11:26:16 -0600 (Sat, 31 Mar 2007) $
 * @license             http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Include AdoDB files.
 */
vendor ('adodb' . DS . 'adodb.inc');

/**
 * AdoDB DBO implementation.
 *
 * Database abstraction implementation for the AdoDB library.
 *
 * @package       cake
 * @subpackage    cake.cake.libs.model.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 $_adodb_column_types = array(
            'C' => 'string',
            'X' => 'text',
            'D' => 'date',
            'T' => 'timestamp',
            'L' => 'boolean',
            'N' => 'float',
            'I' => 'integer',
            'R' => 'integer', // denotes auto-increment or counter field
            'B' => 'binary'
      );

/**
 * 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);
            $adodb = &$this->_adodb;
            $this->connected = $adodb->$connect($config['host'], $config['login'], $config['password'], $config['database']);
            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 (!is_object($this->_result) || $this->_result->EOF) {
                  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[] = array('name' => $column->name,
                                                      'type' => $this->column($column->type));
            }

            $this->__cacheDescription($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 int 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 int 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 int $limit Limit of results returned
 * @param int $offset Offset from which to start results
 * @return string SQL limit/offset statement
 * @todo Please change output string to whatever select your database accepts. adodb doesn't allow us to get the correct limit string out of it.
 */
       function limit($limit, $offset = null) {
            if (empty($limit)) {
                  return null;
            }
            return " LIMIT {$limit}" . ($offset ? "{$offset}" : 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) {
            if (isset($this->_result)) {
                  $adodb_metatyper = &$this->_result;
            } else {
                  $adodb_metatyper = &$this->_adodb->execute('Select 1');
            }

            $interpreted_type = $adodb_metatyper->MetaType($real);
            if (!isset($this->_adodb_column_types[$interpreted_type])) {
                  return 'text';
            }

            return $this->_adodb_column_types[$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, $fields) {
            if (is_array($fields)) {
                        $fields = $fields;
            } else {
                  if ($fields != null) {
                        if (strpos($fields, ',')) {
                              $fields = explode(',', $fields);
                        } else {
                              $fields = array($fields);
                        }
                        $fields = array_map('trim', $fields);
                  } else {
                        foreach($model->_tableInfo->value as $field) {
                              $fields[] = $field['name'];
                        }
                  }
            }

            $count = count($fields);

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

                              $dot = strrpos($fields[$i], '.');
                              if ($dot === 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;
      }
/**
 * Enter description here...
 *
 * @param unknown_type $results
 */
      function resultSet(&$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;
            }
      }
}

?>

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