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<?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 notification_options_reconvert extends \phpbb\db\migration\migration
{
    static public function depends_on()
    {
        return array('\phpbb\db\migration\data\v310\notifications_schema_fix');
    }
    public function update_data()
    {
        return array(
            array('custom', array(array($this, 'purge_notifications'))),
            array('custom', array(array($this, 'convert_notifications'))),
        );
    }
    public function purge_notifications()
    {
        $sql = 'DELETE FROM ' . $this->table_prefix . 'user_notifications';
        $this->sql_query($sql);
    }
    public function convert_notifications($start)
    {
        $insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->table_prefix . 'user_notifications');
        return $this->perform_conversion($insert_buffer, $start);
    }
    /**
    * Perform the conversion (separate for testability)
    *
    * @param \phpbb\db\sql_insert_buffer        $insert_buffer
    * @param int            $start        Start of staggering step
    * @return        mixed        int start of the next step, null if the end was reached
    */
    public function perform_conversion(\phpbb\db\sql_insert_buffer $insert_buffer, $start)
    {
        $limit = 250;
        $converted_users = 0;
        $start = $start ?: 0;
        $sql = 'SELECT user_id, user_notify_type, user_notify_pm
            FROM ' . $this->table_prefix . 'users
            ORDER BY user_id';
        $result = $this->db->sql_query_limit($sql, $limit, $start);
        while ($row = $this->db->sql_fetchrow($result))
        {
            $converted_users++;
            $notification_methods = array();
            // In-board notification
            $notification_methods[] = '';
            if ($row['user_notify_type'] == NOTIFY_EMAIL || $row['user_notify_type'] == NOTIFY_BOTH)
            {
                $notification_methods[] = 'email';
            }
            if ($row['user_notify_type'] == NOTIFY_IM || $row['user_notify_type'] == NOTIFY_BOTH)
            {
                $notification_methods[] = 'jabber';
            }
            // Notifications for posts
            foreach (array('post', 'topic') as $item_type)
            {
                $this->add_method_rows(
                    $insert_buffer,
                    $item_type,
                    0,
                    $row['user_id'],
                    $notification_methods
                );
            }
            if ($row['user_notify_pm'])
            {
                // Notifications for private messages
                // User either gets all methods or no method
                $this->add_method_rows(
                    $insert_buffer,
                    'pm',
                    0,
                    $row['user_id'],
                    $notification_methods
                );
            }
        }
        $this->db->sql_freeresult($result);
        $insert_buffer->flush();
        if ($converted_users < $limit)
        {
            // No more users left, we are done...
            return;
        }
        return $start + $limit;
    }
    /**
    * Insert method rows to DB
    *
    * @param \phpbb\db\sql_insert_buffer $insert_buffer
    * @param string $item_type
    * @param int $item_id
    * @param int $user_id
    * @param string $methods
    */
    protected function add_method_rows(\phpbb\db\sql_insert_buffer $insert_buffer, $item_type, $item_id, $user_id, array $methods)
    {
        $row_base = array(
            'item_type'        => $item_type,
            'item_id'        => (int) $item_id,
            'user_id'        => (int) $user_id,
            'notify'        => 1
        );
        foreach ($methods as $method)
        {
            $row_base['method'] = $method;
            $insert_buffer->insert($row_base);
        }
    }
}