<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

namespace phpbb\db\migration\data\v310;

class profilefield_yahoo_cleanup extends \phpbb\db\migration\migration
{
	public function effectively_installed()
	{
		return !$this->db_tools->sql_column_exists($this->table_prefix . 'users', 'user_yim');
	}

	public static function depends_on()
	{
		return array(
			'\phpbb\db\migration\data\v310\profilefield_yahoo',
		);
	}

	public function update_schema()
	{
		return array(
			'drop_columns'	=> array(
				$this->table_prefix . 'users'			=> array(
					'user_yim',
				),
			),
		);
	}

	public function revert_schema()
	{
		return array(
			'add_columns'	=> array(
				$this->table_prefix . 'users'			=> array(
					'user_yim'	=> array('VCHAR_UNI', ''),
				),
			),
		);
	}
}
