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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\avatar\driver;
/**
* Handles avatars hosted remotely
*/
class remote extends \phpbb\avatar\driver\driver
{
    /**
    * {@inheritdoc}
    */
    public function get_data($row)
    {
        return array(
            'src' => $row['avatar'],
            'width' => $row['avatar_width'],
            'height' => $row['avatar_height'],
        );
    }
    /**
    * {@inheritdoc}
    */
    public function prepare_form($request, $template, $user, $row, &$error)
    {
        $template->assign_vars(array(
            'AVATAR_REMOTE_WIDTH' => ((in_array($row['avatar_type'], array(AVATAR_REMOTE, $this->get_name(), 'remote'))) && $row['avatar_width']) ? $row['avatar_width'] : $request->variable('avatar_remote_width', ''),
            'AVATAR_REMOTE_HEIGHT' => ((in_array($row['avatar_type'], array(AVATAR_REMOTE, $this->get_name(), 'remote'))) && $row['avatar_height']) ? $row['avatar_height'] : $request->variable('avatar_remote_width', ''),
            'AVATAR_REMOTE_URL' => ((in_array($row['avatar_type'], array(AVATAR_REMOTE, $this->get_name(), 'remote'))) && $row['avatar']) ? $row['avatar'] : '',
        ));
        return true;
    }
    /**
    * {@inheritdoc}
    */
    public function process_form($request, $template, $user, $row, &$error)
    {
        global $phpbb_dispatcher;
        $url = $request->variable('avatar_remote_url', '');
        $width = $request->variable('avatar_remote_width', 0);
        $height = $request->variable('avatar_remote_height', 0);
        if (empty($url))
        {
            return false;
        }
        if (!preg_match('#^(http|https|ftp)://#i', $url))
        {
            $url = 'http://' . $url;
        }
        if (!function_exists('validate_data'))
        {
            require($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
        }
        $validate_array = validate_data(
            array(
                'url' => $url,
            ),
            array(
                'url' => array('string', true, 5, 255),
            )
        );
        $error = array_merge($error, $validate_array);
        if (!empty($error))
        {
            return false;
        }
        /**
         * Event to make custom validation of avatar upload
         *
         * @event core.ucp_profile_avatar_upload_validation
         * @var    string    url        Image url
         * @var    string    width    Image width
         * @var    string    height    Image height
         * @var    array    error    Error message array
         * @since 3.2.9-RC1
         */
        $vars = array('url', 'width', 'height', 'error');
        extract($phpbb_dispatcher->trigger_event('core.ucp_profile_avatar_upload_validation', compact($vars)));
        if (!empty($error))
        {
            return false;
        }
        // Check if this url looks alright
        // Do not allow specifying the port (see RFC 3986) or IP addresses
        if (!preg_match('#^(http|https|ftp)://(?:(.*?\.)*?[a-z0-9\-]+?\.[a-z]{2,4}|(?:\d{1,3}\.){3,5}\d{1,3}):?([0-9]*?).*?\.('. implode('|', $this->allowed_extensions) . ')$#i', $url) ||
            preg_match('@^(http|https|ftp)://[^/:?#]+:[0-9]+[/:?#]@i', $url) ||
            preg_match('#^(http|https|ftp)://(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])#i', $url) ||
            preg_match('#^(http|https|ftp)://(?:(?:(?:[\dA-F]{1,4}:){6}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:::(?:[\dA-F]{1,4}:){0,5}(?:[\dA-F]{1,4}(?::[\dA-F]{1,4})?|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:):(?:[\dA-F]{1,4}:){4}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,2}:(?:[\dA-F]{1,4}:){3}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,3}:(?:[\dA-F]{1,4}:){2}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,4}:(?:[\dA-F]{1,4}:)(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,5}:(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,6}:[\dA-F]{1,4})|(?:(?:[\dA-F]{1,4}:){1,7}:)|(?:::))#i', $url))
        {
            $error[] = 'AVATAR_URL_INVALID';
            return false;
        }
        // Get image dimensions
        if (($width <= 0 || $height <= 0) && (($image_data = $this->imagesize->getImageSize($url)) === false))
        {
            $error[] = 'UNABLE_GET_IMAGE_SIZE';
            return false;
        }
        if (!empty($image_data) && ($image_data['width'] <= 0 || $image_data['height'] <= 0))
        {
            $error[] = 'AVATAR_NO_SIZE';
            return false;
        }
        $width = ($width && $height) ? $width : $image_data['width'];
        $height = ($width && $height) ? $height : $image_data['height'];
        if ($width <= 0 || $height <= 0)
        {
            $error[] = 'AVATAR_NO_SIZE';
            return false;
        }
        $types = \phpbb\files\upload::image_types();
        $extension = strtolower(\phpbb\files\filespec::get_extension($url));
        // Check if this is actually an image
        if ($file_stream = @fopen($url, 'r'))
        {
            // Timeout after 1 second
            stream_set_timeout($file_stream, 1);
            // read some data to ensure headers are present
            fread($file_stream, 1024);
            $meta = stream_get_meta_data($file_stream);
            if (isset($meta['wrapper_data']['headers']) && is_array($meta['wrapper_data']['headers']))
            {
                $headers = $meta['wrapper_data']['headers'];
            }
            else if (isset($meta['wrapper_data']) && is_array($meta['wrapper_data']))
            {
                $headers = $meta['wrapper_data'];
            }
            else
            {
                $headers = array();
            }
            foreach ($headers as $header)
            {
                $header = preg_split('/ /', $header, 2);
                if (strtr(strtolower(trim($header[0], ':')), '_', '-') === 'content-type')
                {
                    if (strpos($header[1], 'image/') !== 0)
                    {
                        $error[] = 'AVATAR_URL_INVALID';
                        fclose($file_stream);
                        return false;
                    }
                    else
                    {
                        fclose($file_stream);
                        break;
                    }
                }
            }
        }
        else
        {
            $error[] = 'AVATAR_URL_INVALID';
            return false;
        }
        if (!empty($image_data) && (!isset($types[$image_data['type']]) || !in_array($extension, $types[$image_data['type']])))
        {
            if (!isset($types[$image_data['type']]))
            {
                $error[] = 'UNABLE_GET_IMAGE_SIZE';
            }
            else
            {
                $error[] = array('IMAGE_FILETYPE_MISMATCH', $types[$image_data['type']][0], $extension);
            }
            return false;
        }
        if ($this->config['avatar_max_width'] || $this->config['avatar_max_height'])
        {
            if ($width > $this->config['avatar_max_width'] || $height > $this->config['avatar_max_height'])
            {
                $error[] = array('AVATAR_WRONG_SIZE', $this->config['avatar_min_width'], $this->config['avatar_min_height'], $this->config['avatar_max_width'], $this->config['avatar_max_height'], $width, $height);
                return false;
            }
        }
        if ($this->config['avatar_min_width'] || $this->config['avatar_min_height'])
        {
            if ($width < $this->config['avatar_min_width'] || $height < $this->config['avatar_min_height'])
            {
                $error[] = array('AVATAR_WRONG_SIZE', $this->config['avatar_min_width'], $this->config['avatar_min_height'], $this->config['avatar_max_width'], $this->config['avatar_max_height'], $width, $height);
                return false;
            }
        }
        return array(
            'avatar' => $url,
            'avatar_width' => $width,
            'avatar_height' => $height,
        );
    }
    /**
    * {@inheritdoc}
    */
    public function get_template_name()
    {
        return 'ucp_avatar_options_remote.html';
    }
}