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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Logging functionality for webserver.
 *
 * This includes web server specific code to log some information.
 *
 * @package PhpMyAdmin
 */
namespace PhpMyAdmin;

use PhpMyAdmin\Core;

/**
 * Misc logging functions
 *
 * @package PhpMyAdmin
 */
class Logging
{
    /**
     * Get authentication logging destination
     *
     * @return string
     */
    public static function getLogDestination()
    {
        $log_file = $GLOBALS['PMA_Config']->get('AuthLog');

        /* Autodetect */
        if ($log_file == 'auto') {
            if (function_exists('syslog')) {
                $log_file = 'syslog';
            } elseif (function_exists('error_log')) {
                $log_file = 'php';
            } else {
                $log_file = '';
            }
        }
        return $log_file;
    }

    /**
     * Generate log message for authentication logging
     *
     * @param string $user   user name
     * @param string $status status message
     *
     * @return void
     */
    public static function getLogMessage($user, $status)
    {
        if ($status == 'ok') {
            return 'user authenticated: ' . $user . ' from ' .  Core::getIp();
        }
        return 'user denied: ' . $user . ' (' . $status . ') from ' .  Core::getIp();
    }

    /**
     * Logs user information to webserver logs.
     *
     * @param string $user   user name
     * @param string $status status message
     *
     * @return void
     */
    public static function logUser($user, $status = 'ok')
    {
        if (function_exists('apache_note')) {
            apache_note('userID', $user);
            apache_note('userStatus', $status);
        }
        /* Do not log successful authentications */
        if (! $GLOBALS['PMA_Config']->get('AuthLogSuccess') && $status == 'ok') {
            return;
        }
        $log_file = self::getLogDestination();
        if (empty($log_file)) {
            return;
        }
        $message = self::getLogMessage($user, $status);
        if ($log_file == 'syslog') {
            if (function_exists('syslog') && $status != 'ok') {
                @openlog('phpMyAdmin', LOG_NDELAY | LOG_PID, LOG_AUTHPRIV);
                @syslog(LOG_WARNING, $message);
                closelog();
            }
        } elseif ($log_file == 'php') {
            @error_log($message);
        } elseif ($log_file == 'sapi') {
            @error_log($message, 4);
        } else {
            @error_log(
                date('M d H:i:s') . ' phpmyadmin: ' . $message . "\n",
                3, $log_file
            );
        }
    }
}