<?php
if (!defined('sugarEntry') || !sugarEntry) {
    die('Not A Valid Entry Point');
}
/**
 *
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
 *
 * SuiteCRM is an extension to SugarCRM Community Edition developed by SalesAgility Ltd.
 * Copyright (C) 2011 - 2018 SalesAgility Ltd.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * 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 Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Powered by SugarCRM" and "Supercharged by SuiteCRM".
 */

/*********************************************************************************

 * Description:  Defines the English language pack for the base application.
 * Portions created by SugarCRM are Copyright (C) SugarCRM, Inc.
 * All Rights Reserved.
 * Contributor(s): ______________________________________..
 ********************************************************************************/
require_once('include/SugarLogger/LoggerManager.php');
require_once('include/SugarLogger/LoggerTemplate.php');

/**
 * Default SugarCRM Logger
 * @api
 */
class SugarLogger implements LoggerTemplate
{
    /**
     * properties for the SugarLogger
     */
    protected $logfile = 'suitecrm';
    protected $ext = '.log';
    protected $dateFormat = '%c';
    protected $logSize = '10MB';
    protected $maxLogs = 10;
    protected $filesuffix = "";
    protected $date_suffix = "";
    protected $log_dir = '.';
    protected $defaultPerms = 0664;


    /**
     * used for config screen
     */
    public static $filename_suffix = array(
        //bug#50265: Added none option for previous version users
        "" => "None",
        "%m_%Y"    => "Month_Year",
        "%d_%m"    => "Day_Month",
        "%m_%d_%y" => "Month_Day_Year",
        );

    /**
     * Let's us know if we've initialized the logger file
     */
    protected $initialized = false;

    /**
     * Logger file handle
     */
    protected $fp = false;

    public function __get(
        $key
        ) {
        return $this->$key;
    }

    /**
     * Used by the diagnostic tools to get SugarLogger log file information
     */
    public function getLogFileNameWithPath()
    {
        return $this->full_log_file;
    }

    /**
     * Used by the diagnostic tools to get SugarLogger log file information
     */
    public function getLogFileName()
    {
        return ltrim($this->full_log_file, "./");
    }

    /**
     * Constructor
     *
     * Reads the config file for logger settings
     */
    public function __construct()
    {
        $config = SugarConfig::getInstance();
        $this->ext = $config->get('logger.file.ext', $this->ext);
        $this->logfile = $config->get('logger.file.name', $this->logfile);
        $this->dateFormat = $config->get('logger.file.dateFormat', $this->dateFormat);
        $this->logSize = $config->get('logger.file.maxSize', $this->logSize);
        $this->maxLogs = $config->get('logger.file.maxLogs', $this->maxLogs);
        $this->filesuffix = $config->get('logger.file.suffix', $this->filesuffix);
        $this->defaultPerms = $config->get('logger.file.perms', $this->defaultPerms);
        $log_dir = $config->get('log_dir', $this->log_dir);
        $this->log_dir = $log_dir . (empty($log_dir)?'':'/');
        unset($config);
        $this->_doInitialization();
        LoggerManager::setLogger('default', 'SugarLogger');
    }

    /**
     * Handles the SugarLogger initialization
     */
    protected function _doInitialization()
    {
        if ($this->filesuffix && array_key_exists($this->filesuffix, self::$filename_suffix)) { //if the global config contains date-format suffix, it will create suffix by parsing datetime
            $this->date_suffix = "_" . date(str_replace("%", "", $this->filesuffix));
        }
        $this->full_log_file = $this->log_dir . $this->logfile . $this->date_suffix . $this->ext;
        $this->initialized = $this->_fileCanBeCreatedAndWrittenTo();
        $this->rollLog();
    }

    /**
     * Checks to see if the SugarLogger file can be created and written to
     * @noinspection PhpUndefinedFieldInspection
     * @return bool
     */
    protected function _fileCanBeCreatedAndWrittenTo()
    {
        if (is_writable($this->full_log_file)) {
            return true;
        }

        if (!is_file($this->full_log_file)) {
            @touch($this->full_log_file);
            if ($this->defaultPerms !== false) {
                @chmod($this->full_log_file, $this->defaultPerms);
            }

            return is_writable($this->full_log_file);
        }

        return false;
    }

    /**
     * for log() function, it shows a backtrace information in log when
     * the 'show_log_trace' config variable is set and true
     * @return string a readable trace string
     */
    private function getTraceString()
    {
        $ret = '';
        $trace = debug_backtrace();
        foreach ($trace as $call) {
            $file = isset($call['file']) ? $call['file'] : '???';
            $line = isset($call['line']) ? $call['line'] : '???';
            $class = isset($call['class']) ? $call['class'] : '';
            $type = isset($call['type']) ? $call['type'] : '';
            $function = isset($call['function']) ? $call['function'] : '???';
            $ret .= "\nCall in {$file} at #{$line} from {$class}{$type}{$function}(...)";
        }
        $ret .= "\n";
        return $ret;
    }

    /**
     * Show log
     * and show a backtrace information in log when
     * the 'show_log_trace' config variable is set and true
     * see LoggerTemplate::log()
     */
    public function log(
        $level,
        $message
        ) {
        global $sugar_config;

        if (!$this->initialized) {
            return;
        }
        //lets get the current user id or default to -none- if it is not set yet
        $userID = (!empty($GLOBALS['current_user']->id))?$GLOBALS['current_user']->id:'-none-';

        //if we haven't opened a file pointer yet let's do that
        if (! $this->fp) {
            $this->fp = fopen($this->full_log_file, 'ab');
        }


        // change to a string if there is just one entry
        if (is_array($message) && count($message) == 1) {
            $message = array_shift($message);
        }
        // change to a human-readable array output if it's any other array
        if (is_array($message)) {
            $message = print_r($message, true);
        }


        if (isset($sugar_config['show_log_trace']) && $sugar_config['show_log_trace']) {
            $trace = $this->getTraceString();
            $message .= ("\n" . $trace);
        }

        //write out to the file including the time in the dateFormat the process id , the user id , and the log level as well as the message
        fwrite(
            $this->fp,
            strftime($this->dateFormat) . ' [' . getmypid() . '][' . $userID . '][' . strtoupper($level) . '] ' . $message . "\n"
            );
    }

    /**
     * rolls the logger file to start using a new file
     */
    protected function rollLog(
        $force = false
        ) {
        if (!$this->initialized || empty($this->logSize)) {
            return;
        }
        // bug#50265: Parse the its unit string and get the size properly
        $units = array(
            'b' => 1,                   //Bytes
            'k' => 1024,                //KBytes
            'm' => 1024 * 1024,         //MBytes
            'g' => 1024 * 1024 * 1024,  //GBytes
        );
        if (preg_match('/^\s*([0-9]+\.[0-9]+|\.?[0-9]+)\s*(k|m|g|b)(b?ytes)?/i', $this->logSize, $match)) {
            $rollAt = ( int ) $match[1] * $units[strtolower($match[2])];
        }
        //check if our log file is greater than that or if we are forcing the log to roll if and only if roll size assigned the value correctly
        if ($force || ($rollAt && filesize($this->full_log_file) >= $rollAt)) {
            //now lets move the logs starting at the oldest and going to the newest
            for ($i = $this->maxLogs - 2; $i > 0; $i --) {
                if (file_exists($this->log_dir . $this->logfile . $this->date_suffix . '_'. $i . $this->ext)) {
                    $to = $i + 1;
                    $old_name = $this->log_dir . $this->logfile . $this->date_suffix . '_'. $i . $this->ext;
                    $new_name = $this->log_dir . $this->logfile . $this->date_suffix . '_'. $to . $this->ext;
                    //nsingh- Bug 22548  Win systems fail if new file name already exists. The fix below checks for that.
                    //if/else branch is necessary as suggested by someone on php-doc ( see rename function ).
                    sugar_rename($old_name, $new_name);

                    //rename ( $this->logfile . $i . $this->ext, $this->logfile . $to . $this->ext );
                }
            }
            //now lets move the current .log file
            sugar_rename($this->full_log_file, $this->log_dir . $this->logfile . $this->date_suffix . '_1' . $this->ext);
        }
    }

    /**
     * This is needed to prevent unserialize vulnerability
     */
    public function __wakeup()
    {
        // clean all properties
        foreach (get_object_vars($this) as $k => $v) {
            $this->$k = null;
        }
        throw new Exception("Not a serializable object");
    }

    /**
     * Destructor
     *
     * Closes the SugarLogger file handle
     */
    public function __destruct()
    {
        if ($this->fp) {
            fclose($this->fp);
            $this->fp = false;
        }
    }
}