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<?php
namespace yentu;
class ChangeReverser
{
private $driver;
public function setDriver($driver)
$this->driver = $driver;
}
public function call($method, $arguments)
$reversedMethod = $this->reverseMethod($method);
$reversedArguments = $this->reverseArguments($arguments[0]);
return $this->driver->$reversedMethod($reversedArguments);
private function reverseMethod($method)
return preg_replace_callback(
"/^(?<action>add|drop|reverse|execute|insert)/",
function($matches){
switch($matches['action'])
case 'add': return 'drop';
case 'drop': return 'add';
case 'reverse': return 'execute';
case 'execute': return 'reverse';
case 'insert': return 'delete';
case 'delete': return 'insert';
}, $method
);
private function reverseArguments($arguments)
if(isset($arguments['from']) && isset($arguments['to']))
return array(
'to' => $arguments['from'],
'from' => $arguments['to']
else
return $arguments;
ntentan /
yentu
