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<?php
/**
* Akeeba Engine
*
* @package akeebaengine
* @copyright Copyright (c)2006-2023 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
namespace Akeeba\Engine\Driver;
defined('AKEEBAENGINE') || die();
use Akeeba\Engine\Driver\Query\Base as QueryBase;
/**
* Dummy driver class for flat-file CMS
*/
class None extends Base
{
public static $dbtech = 'none';
/**
* The name of the database driver.
*
* @var string
* @since 1.0
*/
public $name = 'none';
public function __construct(array $options)
{
$this->driverType = 'none';
parent::__construct($options);
}
/**
* Test to see if this db driver is available
*
* @return boolean True on success, false otherwise.
*
* @since 1.0
*/
public static function isSupported()
{
return true;
}
public function open()
{
return $this;
}
/**
* Closes the database connection
*/
public function close()
{
return;
}
/**
* Determines if the connection to the server is active.
*
* @return boolean True if connected to the database engine.
*/
public function connected()
{
return true;
}
/**
* Drops a table from the database.
*
* @param string $table The name of the database table to drop.
* @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
*
* @return Base Returns this object to support chaining.
*/
public function dropTable($table, $ifExists = true)
{
return $this;
}
/**
* Method to escape a string for usage in an SQL statement.
*
* @param string $text The string to be escaped.
* @param boolean $extra Optional parameter to provide extra escaping.
*
* @return string The escaped string.
*/
public function escape($text, $extra = false)
{
return '';
}
/**
* Method to fetch a row from the result set cursor as an associative array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*/
public function fetchAssoc($cursor = null)
{
return false;
}
/**
* Method to free up the memory used for the result set.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return void
*/
public function freeResult($cursor = null)
{
return;
}
/**
* Get the number of affected rows for the previous executed SQL statement.
*
* @return integer The number of affected rows.
*/
public function getAffectedRows()
{
return 0;
}
/**
* Method to get the database collation in use by sampling a text field of a table in the database.
*
* @return mixed The collation in use by the database or boolean false if not supported.
*/
public function getCollation()
{
return false;
}
/**
* Get the number of returned rows for the previous executed SQL statement.
*
* @param resource $cursor An optional database cursor resource to extract the row count from.
*
* @return integer The number of returned rows.
*/
public function getNumRows($cursor = null)
{
return 0;
}
/**
* Get the current query object or a new QueryBase object.
*
* @param boolean $new False to return the current query object, True to return a new QueryBase object.
*
* @return QueryBase The current query object or a new object extending the QueryBase class.
*/
public function getQuery($new = false)
{
return $this->sql;
}
/**
* Retrieves field information about the given tables.
*
* @param string $table The name of the database table.
* @param boolean $typeOnly True (default) to only return field types.
*
* @return array An array of fields by table.
*/
public function getTableColumns($table, $typeOnly = true)
{
return [];
}
/**
* Shows the table CREATE statement that creates the given tables.
*
* @param mixed $tables A table name or a list of table names.
*
* @return array A list of the create SQL for the tables.
*/
public function getTableCreate($tables)
{
return [];
}
/**
* Retrieves field information about the given tables.
*
* @param mixed $tables A table name or a list of table names.
*
* @return array An array of keys for the table(s).
*/
public function getTableKeys($tables)
{
return [];
}
/**
* Method to get an array of all tables in the database.
*
* @return array An array of all the tables in the database.
*/
public function getTableList()
{
return [];
}
/**
* Returns an array with the names of tables, views, procedures, functions and triggers
* in the database. The table names are the keys of the tables, whereas the value is
* the type of each element: table, view, merge, temp, procedure, function or trigger.
* Note that merge are MRG_MYISAM tables and temp is non-permanent data table, usually
* set up as temporary, black hole or federated tables. These two types should never,
* ever, have their data dumped in the SQL dump file.
*
* @param bool $abstract Return or normal names? Defaults to true (names)
*
* @return array
*/
public function getTables($abstract = true)
{
return [];
}
/**
* Get the version of the database connector
*
* @return string The database connector version.
*/
public function getVersion()
{
return '0.0.0';
}
/**
* Method to get the auto-incremented value from the last INSERT statement.
*
* @return integer The value of the auto-increment field from the last inserted row.
*/
public function insertid()
{
return 0;
}
/**
* Locks a table in the database.
*
* @param string $tableName The name of the table to unlock.
*
* @return Base Returns this object to support chaining.
*/
public function lockTable($tableName)
{
return $this;
}
/**
* Execute the SQL statement.
*
* @return mixed A database cursor resource on success, boolean false on failure.
*/
public function query()
{
return false;
}
/**
* Renames a table in the database.
*
* @param string $oldTable The name of the table to be renamed
* @param string $newTable The new name for the table.
* @param string $backup Table prefix
* @param string $prefix For the table - used to rename constraints in non-mysql databases
*
* @return Base Returns this object to support chaining.
*/
public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
{
return $this;
}
/**
* Select a database for use.
*
* @param string $database The name of the database to select for use.
*
* @return boolean True if the database was successfully selected.
*/
public function select($database)
{
return true;
}
/**
* Set the connection to use UTF-8 character encoding.
*
* @return boolean True on success.
*/
public function setUTF()
{
return true;
}
/**
* Method to commit a transaction.
*
* @return void
*/
public function transactionCommit()
{
return;
}
/**
* Method to roll back a transaction.
*
* @return void
*/
public function transactionRollback()
{
return;
}
/**
* Method to initialize a transaction.
*
* @return void
*/
public function transactionStart()
{
return;
}
/**
* Unlocks tables in the database.
*
* @return Base Returns this object to support chaining.
*/
public function unlockTables()
{
return $this;
}
/**
* Method to fetch a row from the result set cursor as an array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*/
protected function fetchArray($cursor = null)
{
return false;
}
/**
* Method to fetch a row from the result set cursor as an object.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
* @param string $class The class name to use for the returned row object.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*/
protected function fetchObject($cursor = null, $class = 'stdClass')
{
return false;
}
}