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<?php
/*
 * MODX Revolution
 *
 * Copyright 2006-2014 by MODX, LLC.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 */
/**
 * @package modx
 * @subpackage error
 */
/**
 * The base PHP error handler class for the modX framework.
 *
 * @package modx
 * @subpackage error
 */
class modErrorHandler {
    /**
     * @var modX A reference to the modX instance.
     */
    public $modx = null;

    /**
     * @var array A stack of errors.
     */
    public $stack = null;

    /**
     * Construct a new modErrorHandler instance.
     *
     * @param modX &$modx A reference to the modX instance.
     * @param array $stack A stack of errors that can be passed in.  Send a non-array value to
     * prevent any errors from being recorded in the stack.
     */
    function __construct(modX &$modx, array $stack = array()) {
        $this->modx = & $modx;
        $this->stack = $stack;
    }

    /**
     * Handles any recoverable PHP errors or calls to trigger_error().
     *
     * @param integer $errno An integer number indicating the type of error.
     * @param string $errstr A description of the error.
     * @param string $errfile The filename in which the error occured.
     * @param integer $errline The line number in the file where the error occured.
     * @param array $errcontext A copy of all variables and their values available at the time the
     * error occured and in the scope of the script being executed.
     * @return boolean True if the error was handled or false if the default PHP error handler
     * should be invoked to handle it.
     */
    public function handleError($errno, $errstr, $errfile = null, $errline = null, $errcontext = null) {
        if (error_reporting() == 0) return;
        $handled = false;
        $error = array (
            'errno' => $errno,
            'errstr' => $errstr,
            'errfile' => $errfile,
            'errline' => $errline
        );
        switch ($errno) {
            case E_USER_ERROR:
                $handled= true;
                $errmsg= 'User error: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_ERROR, $errmsg, '', '', $errfile, $errline);
                break;
            case E_WARNING:
                $handled= true;
                $errmsg= 'PHP warning: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_ERROR, $errmsg, '', '', $errfile, $errline);
                break;
            case E_USER_WARNING:
                $handled= true;
                $errmsg= 'User warning: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_ERROR, $errmsg, '', '', $errfile, $errline);
                break;
            case E_NOTICE:
                $handled= true;
                $errmsg= 'PHP notice: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_WARN, $errmsg, '', '', $errfile, $errline);
                break;
            case E_USER_NOTICE:
                $handled= true;
                $errmsg= 'User notice: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_WARN, $errmsg, '', '', $errfile, $errline);
                break;
            case E_STRICT:
                $handled= true;
                $errmsg= 'E_STRICT information: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_INFO, $errmsg, '','',$errfile,$errline);
                return $handled;
                break;
            case E_RECOVERABLE_ERROR:
                $handled= true;
                $errmsg= 'Recoverable error: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_ERROR, $errmsg, '', '', $errfile, $errline);
                break;
            case E_DEPRECATED:
                $handled= true;
                $errmsg= 'PHP deprecated: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_WARN, $errmsg, '', '', $errfile, $errline);
                break;
            case E_USER_DEPRECATED:
                $handled= true;
                $errmsg= 'User deprecated: ' . $errstr;
                $this->modx->log(modX::LOG_LEVEL_WARN, $errmsg, '', '', $errfile, $errline);
                break;
            default:
                $handled= false;
                $errmsg= 'Un-recoverable error ' . $errno . ': '. $errstr;
                $this->modx->log(modX::LOG_LEVEL_ERROR, $errmsg, '', '', $errfile, $errline);
                break;
        }
        if (is_array($this->stack)) array_push($this->stack, $error);
        return $handled;
    }

	/**
	 * Converts an error to a readable string.
	 *
	 * @access public
	 * @param mixed $error The error to convert.
	 * @return string The parsed error string.
	 */
    public function toString($error) {
        $string = '';
        if (is_array($error)) {
            $string = '<pre>' . print_r($error, true) . '</pre>';
        }
        return $string;
    }
}