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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Logging Class
 *
 * @package        CodeIgniter
 * @subpackage    Libraries
 * @category    Logging
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/general/errors.html
 */
class CI_Log {

    protected $_log_path;
    protected $_threshold    = 1;
    protected $_date_fmt    = 'Y-m-d H:i:s';
    protected $_enabled    = TRUE;
    protected $_levels    = array('ERROR' => '1', 'DEBUG' => '2',  'INFO' => '3', 'ALL' => '4');

    /**
     * Constructor
     */
    public function __construct()
    {
        $config =& get_config();

        $this->_log_path = ($config['log_path'] != '') ? $config['log_path'] : APPPATH.'logs/';

        if ( ! is_dir($this->_log_path) OR ! is_really_writable($this->_log_path))
        {
            $this->_enabled = FALSE;
        }

        if (is_numeric($config['log_threshold']))
        {
            $this->_threshold = $config['log_threshold'];
        }

        if ($config['log_date_format'] != '')
        {
            $this->_date_fmt = $config['log_date_format'];
        }
    }

    // --------------------------------------------------------------------

    /**
     * Write Log File
     *
     * Generally this function will be called using the global log_message() function
     *
     * @param    string    the error level
     * @param    string    the error message
     * @param    bool    whether the error is a native PHP error
     * @return    bool
     */
    public function write_log($level = 'error', $msg, $php_error = FALSE)
    {
        if ($this->_enabled === FALSE)
        {
            return FALSE;
        }

        $level = strtoupper($level);

        if ( ! isset($this->_levels[$level]) OR ($this->_levels[$level] > $this->_threshold))
        {
            return FALSE;
        }

        $filepath = $this->_log_path.'log-'.date('Y-m-d').'.php';
        $message  = '';

        if ( ! file_exists($filepath))
        {
            $message .= "<"."?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?".">\n\n";
        }

        if ( ! $fp = @fopen($filepath, FOPEN_WRITE_CREATE))
        {
            return FALSE;
        }

        $message .= $level.' '.(($level == 'INFO') ? ' -' : '-').' '.date($this->_date_fmt). ' --> '.$msg."\n";

        flock($fp, LOCK_EX);
        fwrite($fp, $message);
        flock($fp, LOCK_UN);
        fclose($fp);

        @chmod($filepath, FILE_WRITE_MODE);
        return TRUE;
    }

}
// END Log Class

/* End of file Log.php */
/* Location: ./system/libraries/Log.php */