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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\v31x;
class style_update extends \phpbb\db\migration\migration
{
    static public function depends_on()
    {
        return array('\phpbb\db\migration\data\v310\gold');
    }
    public function update_data()
    {
        return array(
            array('custom', array(array($this, 'update_installed_styles'))),
        );
    }
    public function update_installed_styles()
    {
        // Get all currently available styles
        $styles = $this->find_style_dirs();
        $style_paths = $style_ids = array();
        $sql = 'SELECT style_path, style_id
                FROM ' . $this->table_prefix . 'styles';
        $result = $this->db->sql_query($sql);
        while ($styles_row = $this->db->sql_fetchrow())
        {
            if (in_array($styles_row['style_path'], $styles))
            {
                $style_paths[] = $styles_row['style_path'];
                $style_ids[] = $styles_row['style_id'];
            }
        }
        $this->db->sql_freeresult($result);
        // Install prosilver if no style is available and prosilver can be installed
        if (empty($style_paths) && in_array('prosilver', $styles))
        {
            // Try to parse config file
            $cfg = parse_cfg_file($this->phpbb_root_path . 'styles/prosilver/style.cfg');
            // Stop running this if prosilver cfg file can't be read
            if (empty($cfg))
            {
                throw new \RuntimeException('No styles available and could not fall back to prosilver.');
            }
            $style = array(
                'style_name'        => 'prosilver',
                'style_copyright'    => '&copy; phpBB Limited',
                'style_active'        => 1,
                'style_path'        => 'prosilver',
                'bbcode_bitfield'    => 'kNg=',
                'style_parent_id'    => 0,
                'style_parent_tree'    => '',
            );
            // Add to database
            $this->db->sql_transaction('begin');
            $sql = 'INSERT INTO ' . $this->table_prefix . 'styles
                    ' . $this->db->sql_build_array('INSERT', $style);
            $this->db->sql_query($sql);
            $style_id = $this->db->sql_nextid();
            $style_ids[] = $style_id;
            $this->db->sql_transaction('commit');
            // Set prosilver to default style
            $this->config->set('default_style', $style_id);
        }
        else if (empty($styles) && empty($available_styles))
        {
            throw new \RuntimeException('No valid styles available');
        }
        // Make sure default style is available
        if (!in_array($this->config['default_style'], $style_ids))
        {
            $this->config->set('default_style', array_pop($style_ids));
        }
        // Reset users to default style if their user_style is nonexistent
        $sql = 'UPDATE ' . $this->table_prefix . "users
            SET user_style = {$this->config['default_style']}
            WHERE " . $this->db->sql_in_set('user_style', $style_ids, true, true);
        $this->db->sql_query($sql);
    }
    /**
     * Find all directories that have styles
     * Copied from acp_styles
     *
     * @return array Directory names
     */
    protected function find_style_dirs()
    {
        $styles = array();
        $styles_path = $this->phpbb_root_path . 'styles/';
        $dp = @opendir($styles_path);
        if ($dp)
        {
            while (($file = readdir($dp)) !== false)
            {
                $dir = $styles_path . $file;
                if ($file[0] == '.' || !is_dir($dir))
                {
                    continue;
                }
                if (file_exists("{$dir}/style.cfg"))
                {
                    $styles[] = $file;
                }
            }
            closedir($dp);
        }
        return $styles;
    }
}