<?php
/* Copyright (C) 2024		MDW							<mdeweerd@users.noreply.github.com>
 * Copyright (C) 2024       Frédéric France             <frederic.france@free.fr>
 */

require_once DOL_DOCUMENT_ROOT.'/core/modules/syslog/logHandler.php';

/**
 * Class to manage logging to a file
 */
class mod_syslog_file extends LogHandler
{
	/**
	 * @var string
	 */
	public $code = 'file';
	/**
	 * @var float|int Last log time, used to compute delay
	 */
	public $lastTime = 0;

	/**
	 * 	Return name of logger
	 *
	 * 	@return	string		Name of logger
	 */
	public function getName()
	{
		global $langs;

		return $langs->trans('File');
	}

	/**
	 * Version of the module ('x.y.z' or 'dolibarr' or 'experimental' or 'development')
	 *
	 * @return string
	 */
	public function getVersion()
	{
		return 'dolibarr';
	}

	/**
	 * Content of the info tooltip.
	 *
	 * @return false|string
	 */
	public function getInfo()
	{
		global $langs;

		return $langs->trans('YouCanUseDOL_DATA_ROOT');
	}

	/**
	 * Is the logger active ?
	 *
	 * @return int<0,1>		If logger enabled
	 */
	public function isActive()
	{
		return !getDolGlobalString('SYSLOG_DISABLE_LOGHANDLER_FILE') ? 1 : 0; // Set SYSLOG_DISABLE_LOGHANDLER_FILE to 1 to disable this loghandler
	}

	/**
	 * 	Return array of configuration data
	 *
	 * 	@return	array<array{name:string,constant:string,default:string,css?:string}>	Return array of configuration data
	 */
	public function configure()
	{
		global $langs;

		return array(
			array(
				'name' => $langs->trans('SyslogFilename'),
				'constant' => 'SYSLOG_FILE',
				'default' => 'DOL_DATA_ROOT/dolibarr.log',
				'css' => 'minwidth300 maxwidth500'
			)
		);
	}

	/**
	 * 	Return if configuration is valid
	 *
	 * 	@return	bool		true if ok
	 */
	public function checkConfiguration()
	{
		global $langs;

		$filename = $this->getFilename();

		if (file_exists($filename) && is_writable($filename)) {
			dol_syslog('admin/syslog: file '.$filename);
			return true;
		} else {
			$this->errors[] = $langs->trans("ErrorFailedToOpenFile", $filename);
			return false;
		}
	}

	/**
	 * Return the parsed logfile path
	 *
	 * @param	string	$suffixinfilename	When output is a file, append this suffix into default log filename.
	 * @return	string
	 */
	private function getFilename($suffixinfilename = '')
	{
		global $conf;

		if (!getDolGlobalString('SYSLOG_FILE')) {
			$tmp = DOL_DATA_ROOT.'/dolibarr.log';
		} else {
			$tmp = str_replace('DOL_DATA_ROOT', DOL_DATA_ROOT, $conf->global->SYSLOG_FILE);
		}

		// Deprecated, use instead the constant 'SYSLOG_FILE_ADDSUFFIX' and/or 'SYSLOG_FILE_ONEPERIP'
		if (getDolGlobalString('SYSLOG_FILE_ONEPERSESSION')) {
			if (is_numeric(getDolGlobalString('SYSLOG_FILE_ONEPERSESSION'))) {
				if (getDolGlobalInt('SYSLOG_FILE_ONEPERSESSION') == 1) {	// file depend on instance session key name (Note that session name is same for the instance so for all users and is not a per user value)
					$suffixinfilename .= '_'.session_name();
				}
				if (getDolGlobalInt('SYSLOG_FILE_ONEPERSESSION') == 2) {	// file depend on instance session key name + ip so nearly per user
					$suffixinfilename .= '_'.session_name().'_'.getUserRemoteIP();
				}
			} else {
				$suffixinfilename .= '_' . getDolGlobalString('SYSLOG_FILE_ONEPERSESSION');
			}
		}

		if (defined('SYSLOG_FILE_ADDSUFFIX')) {
			$suffixinfilename .= '_' . constant('SYSLOG_FILE_ADDSUFFIX');
		}
		if (defined('SYSLOG_FILE_ADDIP')) {
			$suffixinfilename .= '_'.getUserRemoteIP();
		}

		return $suffixinfilename ? preg_replace('/\.log$/i', $suffixinfilename.'.log', $tmp) : $tmp;
	}


	// @phan-suppress-next-line PhanPluginDuplicateArrayKey
	const DOL_LOG_LEVELS = array(
		LOG_EMERG => 'EMERG',
		LOG_ALERT => 'ALERT',
		LOG_CRIT => 'CRIT',
		LOG_ERR => 'ERR',
		LOG_WARNING => 'WARNING',
		LOG_NOTICE => 'NOTICE',
		LOG_INFO => 'INFO',
		LOG_DEBUG => 'DEBUG'
	);

	/**
	 * Export the message
	 *
	 * @param	array{level:int,ip:string,ospid:string,osuser:string,message:string}	$content 	Array containing the info about the message
	 * @param	string	$suffixinfilename	When output is a file, append this suffix into default log filename.
	 * @return	void
	 * @phan-suppress PhanPluginDuplicateArrayKey
	 */
	public function export($content, $suffixinfilename = '')
	{
		if (getDolGlobalString('MAIN_SYSLOG_DISABLE_FILE')) {
			return; // Global option to disable output of this handler
		}


		// Prepare log message

		$delay = "";
		if (getDolGlobalString('MAIN_SYSLOG_SHOW_DELAY')) {
			$now = microtime(true);
			$delay = " ".sprintf("%05.3f", $this->lastTime != 0 ? $now - $this->lastTime : 0);
			$this->lastTime = $now;
		}
		$message = dol_print_date(dol_now('gmt'), 'standard', 'gmt').$delay." ".sprintf("%-7s", self::DOL_LOG_LEVELS[$content['level']])." ".sprintf("%-15s", $content['ip']);
		$message .= " ".sprintf("%7s", dol_trunc($content['ospid'], 7, 'right', 'UTF-8', 1));
		$message .= " ".sprintf("%6s", dol_trunc($content['osuser'], 6, 'right', 'UTF-8', 1));
		// @phan-suppress-next-line PhanParamSuspiciousOrder
		$message .= " ".($this->ident > 0 ? str_pad('', ((int) $this->ident), ' ') : '').$content['message'];
		$message .= "\n";


		// Write log message

		$logfile = $this->getFilename($suffixinfilename);

		$result = false;
		if (defined('SYSLOG_FILE_NO_ERROR')) {
			$filefd = @fopen($logfile, "a");
		} else {
			$filefd = fopen($logfile, "a");
		}

		if ($filefd !== false) {
			$result = fwrite($filefd, $message);
			fclose($filefd);
			dolChmod($logfile);
		}
		if ($result === false && (!defined('SYSLOG_FILE_NO_ERROR') || !constant('SYSLOG_FILE_NO_ERROR'))) {
			global $dolibarr_main_prod;
			// Do not break dolibarr usage if log fails
			//throw new Exception('Failed to open log file '.basename($logfile));
			print 'Failed to write to log file '.($dolibarr_main_prod ? basename($logfile) : $logfile)."\n";
		}
	}
}