<?php
/**
 * Update6.php
 *
 * The Update6 class file.
 *
 * PHP versions 5
 *
 * @author    Alexander Schneider <alexanderschneider85@gmail.com>
 * @copyright 2008-2017 Alexander Schneider
 * @license   http://www.gnu.org/licenses/gpl-2.0.html  GNU General Public License, version 2
 * @version   SVN: $id$
 * @link      http://wordpress.org/extend/plugins/user-access-manager/
 */
namespace UserAccessManager\Setup\Update;

use UserAccessManager\UserGroup\UserGroup;

/**
 * Class Update6
 *
 * @package UserAccessManager\Setup\Update
 */
class Update6 extends Update implements UpdateInterface
{
    /**
     * Returns the version.
     *
     * @return string
     */
    public function getVersion()
    {
        return '1.6.1';
    }

    /**
     * Executes the update.
     *
     * @return bool
     */
    public function update()
    {
        $dbAccessGroupToObject = $this->database->getUserGroupToObjectTable();

        $dbGroupTypeColumn = $this->database->getVariable(
            "SHOW COLUMNS FROM {$dbAccessGroupToObject}
            LIKE 'group_type'"
        );

        if ($dbGroupTypeColumn !== 'group_type') {
            $alterQuery = "ALTER TABLE {$dbAccessGroupToObject}
                ADD group_type VARCHAR(32) NOT NULL AFTER group_id,
                ADD from_date DATETIME NULL DEFAULT NULL,
                ADD to_date DATETIME NULL DEFAULT NULL,
                MODIFY group_id VARCHAR(32) NOT NULL,
                MODIFY object_id VARCHAR(32) NOT NULL,
                MODIFY object_type VARCHAR(32) NOT NULL,
                DROP PRIMARY KEY,
                ADD PRIMARY KEY (object_id, object_type, group_id, group_type)";
        } else {
            $alterQuery = "ALTER TABLE {$dbAccessGroupToObject}
                MODIFY group_type VARCHAR(32) NOT NULL,
                MODIFY group_id VARCHAR(32) NOT NULL,
                MODIFY object_id VARCHAR(32) NOT NULL,
                MODIFY object_type VARCHAR(32) NOT NULL";
        }

        $success = $this->database->query($alterQuery) !== false;

        $update = $this->database->update(
            $dbAccessGroupToObject,
            ['group_type' => UserGroup::USER_GROUP_TYPE],
            ['group_type' => '']
        );

        return $success && $update !== false;
    }
}