Query/docs/files/core/table_builder.php.txt
2014-04-24 11:25:12 -04:00

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<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @package Query
* @author Timothy J. Warren
* @copyright Copyright (c) 2012 - 2014
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
namespace Query\Table;
use Query\Driver\Driver_Interface;
// --------------------------------------------------------------------------
/**
* Abstract class defining database / table creation methods
*
* @package Query
* @subpackage Table_Builder
*/
class Table_Builder {
/**
* The name of the current table
* @var string
*/
protected $name = '';
/**
* Driver for the current db
* @var Driver_Interface
*/
private $driver = NULL;
/**
* Options for the current table
* @var array
*/
private $table_options = array();
/**
* Columns to be added/updated for the current table
* @var array
*/
private $columns = array();
/**
* Indexes to be added/updated for the current table
* @var array
*/
private $indexes = array();
/**
* Foreign keys to be added/updated for the current table
* @var array
*/
private $foreign_keys = array();
// --------------------------------------------------------------------------
/**
* Constructor
*
* @param string $name
* @param array $options
* @param Driver_Interface $driver
* @return Table_Builder
*/
public function __construct($name = '', $options = array(), Driver_Interface $driver = NULL)
{
$this->table_options = array_merge($this->table_options, $options);
$this->set_driver($driver);
if ($name !== '')
{
$this->name = (isset($this->driver)) ? $this->driver->prefix_table($name) : $name;
}
return $this;
}
// --------------------------------------------------------------------------
/**
* Alias to constructor
*
* @param string $name
* @param array $options
* @param Driver_Interface $driver
* @return Table_Builder
*/
public function __invoke($name = '', $options = array(), Driver_Interface $driver = NULL)
{
return $this->__construct($name, $options, $driver);
}
// --------------------------------------------------------------------------
/**
* Set the reference to the current database driver
*
* @param Driver_Interface $driver
* @return Table_Builder
*/
public function set_driver(Driver_Interface $driver = NULL)
{
if ( ! is_null($driver))
{
$this->driver = $driver;
}
return $this;
}
// --------------------------------------------------------------------------
/**
* Get the current DB Driver
*
* @return Driver_Interface
*/
public function get_driver()
{
return $this->driver;
}
// --------------------------------------------------------------------------
// ! Column Methods
// --------------------------------------------------------------------------
/**
* Add a column to the current table
*
* @param string $column_name
* @param string $type
* @param array $options
* @return Table_Builder
*/
public function add_column($column_name, $type = NULL, $options = array())
{
$col = new Table_Column($column_name, $type, $options);
$this->columns[] = $col;
return $this;
}
// --------------------------------------------------------------------------
/**
* Remove the specified column name from the current table
*
* @param string $column_name
* @return \Query\Table\Table_Builder
*/
public function remove_column($column_name)
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Rename the specified column on the current table
*
* @param string $old_name
* @param string $new_name
* @return \Query\Table\Table_Builder
*/
public function rename_column($old_name, $new_name)
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Change the specified column on the current table
*
* @param string $column_name
* @param string $new_column_type
* @param array $options
* @return \Query\Table\Table_Builder
*/
public function change_column($column_name, $new_column_type, $options = array())
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Determine whether the column currently exists on the current table
*
* @param string $column_name
* @param array $options
* @return bool
*/
public function has_column($column_name, $options = array())
{
}
// --------------------------------------------------------------------------
// ! Index Methods
// --------------------------------------------------------------------------
/**
* Add an index to the current table
*
* @param array $columns
* @param array $options
* @return \Query\Table\Table_Builder
*/
public function add_index($columns, $options = array())
{
$col = new Table_Index($columns, $options);
$this->indexes[] = $col;
return $this;
}
// --------------------------------------------------------------------------
/**
* Remove an index from the current table
* @param array $columns
* @param array $options
* @return \Query\Table\Table_Builder
*/
public function remove_index($columns, $options = array())
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Remove an index by its name from the current table
*
* @param string $name
* @return \Query\Table\Table_Builder
*/
public function remove_index_by_name($name)
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Check if the current table has an index on the specified columns
*
* @param array $columns
* @param array $options
* @return bool
*/
public function has_index($columns, $options = array())
{
}
// --------------------------------------------------------------------------
// ! Foreign Key Methods
// --------------------------------------------------------------------------
/**
* Add a foreign key to the current table
*
* @param array $columns
* @param string $referenced_table
* @param array $referenced_columns
* @param array $options
* @return \Query\Table\Table_Builder
*/
public function add_foreign_key($columns, $referenced_table, $referenced_columns = array('id'), $options = array())
{
$key = new Table_Foreign_Key($columns, $referenced_table, $referenced_columns, $options);
$this->foreign_keys[] = $key;
return $this;
}
// --------------------------------------------------------------------------
/**
* Drop the foreign key from the current table
*
* @param array $columns
* @param string $constraint
* @return \Query\Table\Table_Builder
*/
public function drop_foreign_key($columns, $constraint = NULL)
{
return $this;
}
// --------------------------------------------------------------------------
/**
* Determine whether the current table has the specified foreign key
*
* @param array $columns
* @param string $constraint
* @return bool
*/
public function has_foreign_key($columns, $constraint = NULL)
{
$keys = $this->get_driver()->get_fks($this->name);
foreach($keys as $key)
{
}
return FALSE;
}
// --------------------------------------------------------------------------
// ! Table-wide methods
// --------------------------------------------------------------------------
/**
* Check whether the current table exists
*
* @return bool
*/
public function exists()
{
$tables = $this->driver->get_tables();
return in_array($this->name, $tables);
}
// --------------------------------------------------------------------------
/**
* Drop the current table
*
* @return void
*/
public function drop()
{
}
// --------------------------------------------------------------------------
/**
* Rename the current table
*
* @param string $new_table_name
* @return void
*/
public function rename($new_table_name)
{
}
// --------------------------------------------------------------------------
/**
* Get the list of columns for the current table
*
* @return array
*/
public function get_columns()
{
return $this->driver->get_columns($this->name);
}
// --------------------------------------------------------------------------
// ! Action methods
// --------------------------------------------------------------------------
/**
* Create the table from the previously set options
*
* @return void
*/
public function create()
{
$this->reset();
}
// --------------------------------------------------------------------------
/**
* Update the current table with the changes made
*
* @return void
*/
public function update()
{
$this->reset();
}
// --------------------------------------------------------------------------
/**
* Save the changes made to the table
*
* @return void
*/
public function save()
{
($this->exists())
? $this->update()
: $this->create();
}
// --------------------------------------------------------------------------
/**
* Reset the state of the table builder
*
* @return void
*/
public function reset()
{
$skip = array(
'driver' => 'driver'
);
foreach($this as $key => $val)
{
if ( ! isset($skip[$key]))
{
$this->$key = NULL;
}
}
}
}
// End of table_builder.php