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<?php
/** *********************************************
* LiteSpeed Web Server Cache Manager
*
* @author Michael Alegre
* @copyright 2018-2023 LiteSpeed Technologies, Inc.
* *******************************************
*/
namespace Lsc\Wp;
use Lsc\Wp\Context\ContextOption;
/**
* Logger is a pseudo singleton.
*
* Public Logger functions starting with 'p_' are intended for internal use to
* account for $instance sometimes being of a different non-extending logger
* class.
*/
class Logger
{
/**
* @var int
*/
const L_NONE = 0;
/**
* @var int
*/
const L_ERROR = 1;
/**
* @var int
*/
const L_WARN = 2;
/**
* @var int
*/
const L_NOTICE = 3;
/**
* @var int
*/
const L_INFO = 4;
/**
* @var int
*/
const L_VERBOSE = 5;
/**
* @var int
*/
const L_DEBUG = 9;
/**
* @var int
*/
const UI_INFO = 0;
/**
* @var int
*/
const UI_SUCC = 1;
/**
* @var int
*/
const UI_ERR = 2;
/**
* @var int
*/
const UI_WARN = 3;
/**
* @var null|Logger|object Object that implements all Logger class public
* functions (minus setInstance()). Caution, this requirement is not
* enforced in the code.
*/
protected static $instance;
/**
* @var int Highest log message level allowed to be logged. Set to the
* higher value between $this->logFileLvl and $this->logEchoLvl.
*/
protected $logLvl;
/**
* @var string File that log messages will be written to (if writable).
*/
protected $logFile;
/**
* @var int Highest log message level allowed to be written to the log
* file.
*/
protected $logFileLvl;
/**
* @var string Additional tag to be added at the start of any log messages.
*/
protected $addTagInfo = '';
/**
* @var bool When set to true, log messages will not be written to the log
* file until this logger object is destroyed.
*/
protected $bufferedWrite;
/**
* @var LogEntry[]|object[] Stores created objects that implement all
* LogEntry class public functions.
*/
protected $msgQueue = array();
/**
* @var int Highest log message level allowed to echo.
*/
protected $logEchoLvl;
/**
* @var bool When set to true, echoing of log messages is suppressed.
*/
protected $bufferedEcho;
/**
* @var string[][] Leveraged by control panel GUI to store and retrieve
* display messages. Also used as temporary storage for display only
* messages by UserCommand.
*/
protected $uiMsgs = array(
self::UI_INFO => array(),
self::UI_SUCC => array(),
self::UI_ERR => array(),
self::UI_WARN => array()
);
/**
*
* @param ContextOption $ctxOption
*/
final protected function __construct( ContextOption $ctxOption )
{
$this->logFile = $ctxOption->getDefaultLogFile();
$this->logFileLvl = $ctxOption->getLogFileLvl();
$this->bufferedWrite = $ctxOption->isBufferedWrite();
$this->logEchoLvl = $ctxOption->getLogEchoLvl();
$this->bufferedEcho = $ctxOption->isBufferedEcho();
$this->logLvl = max($this->logEchoLvl, $this->logFileLvl);
}
/**
*
* @throws LSCMException Thrown indirectly by $this->writeToFile() call.
*/
public function __destruct()
{
if ( $this->bufferedWrite ) {
$this->writeToFile($this->msgQueue);
}
}
/**
*
* @param ContextOption $contextOption
*
* @throws LSCMException Thrown when a static Logger instance has already
* been initialized.
*/
public static function Initialize( ContextOption $contextOption )
{
if ( static::$instance != null ) {
throw new LSCMException(
'Logger cannot be initialized twice.',
LSCMException::E_PROGRAM
);
}
static::$instance = new static($contextOption);
}
/**
* Set static::$instance to a pre-created logger object.
*
* This function is intended as an alternative to Initialize() and will
* throw an exception if static::$instance is already set.
*
* @since 1.9.1
*
* @param object $loggerObj
*
* @throws LSCMException Thrown when Logger instance is already set.
*/
public static function setInstance( $loggerObj )
{
if ( static::$instance != null ) {
throw new LSCMException(
'Logger instance already set.',
LSCMException::E_PROGRAM
);
}
static::$instance = $loggerObj;
}
/**
*
* @since 1.9
*
* @param string $logFile
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function changeLogFileUsed( $logFile )
{
static::me()->p_setLogFile($logFile);
}
/**
*
* @since 1.9
*
* @param string $addInfo
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function setAdditionalTagInfo( $addInfo )
{
static::me()->p_setAddTagInfo($addInfo);
}
/**
*
* @since 1.9.1
*
* @param string $msg
* @param int $type
*/
public function p_addUiMsg( $msg, $type )
{
switch ($type) {
case static::UI_INFO:
case static::UI_SUCC:
case static::UI_ERR:
case static::UI_WARN:
$this->uiMsgs[$type][] = $msg;
break;
//no default
}
}
/**
*
* @since 1.9.1
*
* @param LogEntry[]|object[] $entries Array of objects that implement all
* LogEntry class public functions.
*
* @throws LSCMException Thrown indirectly by $this->echoEntries() call.
*/
public function p_echoEntries( array $entries )
{
$this->echoEntries($entries);
}
/**
*
* @since 1.9.1
*
* @return string
*/
public function p_getAddTagInfo()
{
return $this->addTagInfo;
}
/**
*
* @since 1.9.1
*
* @return bool
*/
public function p_getBufferedEcho()
{
return $this->bufferedEcho;
}
/**
*
* @since 1.9.1
*
* @return bool
*/
public function p_getBufferedWrite()
{
return $this->bufferedWrite;
}
/**
*
* @since 1.9.1
*
* @return string
*/
public function p_getLogFile()
{
return $this->logFile;
}
/**
*
* @since 1.9.1
*
* @return LogEntry[]|object[]
*/
public function p_getMsgQueue()
{
return $this->msgQueue;
}
/**
*
* @since 1.9.1
*
* @param int $type
*
* @return string[]
*/
public function p_getUiMsgs( $type )
{
switch ($type) {
case static::UI_INFO:
case static::UI_SUCC:
case static::UI_ERR:
case static::UI_WARN:
return $this->uiMsgs[$type];
default:
return array();
}
}
/**
*
* @since 1.9.1
*
* @param string $msg
* @param int $lvl
*
* @throws LSCMException Thrown indirectly by $this->log() call.
*/
public function p_log( $msg, $lvl )
{
$this->log($msg, $lvl);
}
/**
*
* @since 1.9.1
*
* @param string $addInfo
*/
public function p_setAddTagInfo( $addInfo )
{
$this->addTagInfo = $addInfo;
}
/**
*
* @since 1.9.1
*
* @param string $logFile
*/
public function p_setLogFile( $logFile )
{
$this->logFile = $logFile;
}
/**
*
* @since 1.9.1
*
* @param int $logFileLvl
*/
public function p_setLogFileLvl( $logFileLvl )
{
$this->logFileLvl = $logFileLvl;
}
/**
*
* @since 1.9.1
*
* @param LogEntry[]|object[] $msgQueue
*/
public function p_setMsgQueue( array $msgQueue )
{
$this->msgQueue = $msgQueue;
}
/**
*
* @since 1.9.1
*
* @param LogEntry[]|object[] $entries Array of objects that implement all
* LogEntry class public functions.
*
* @throws LSCMException Thrown indirectly by $this->writeToFile() call.
*/
public function p_writeToFile( array $entries )
{
$this->writeToFile($entries);
}
/**
*
* @since 1.9
*
* @return string
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function getAdditionalTagInfo()
{
return static::me()->p_getAddTagInfo();
}
/**
*
* @since 1.9
*
* @return string
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function getLogFilePath()
{
return static::me()->p_getLogFile();
}
/**
*
* @since 1.9
*
* @return LogEntry[]|object[] Array of objects that implement all LogEntry
* class public functions.
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function getLogMsgQueue()
{
return static::me()->p_getMsgQueue();
}
/**
*
* @param int $type
*
* @return string[]
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function getUiMsgs( $type )
{
return static::me()->p_getUiMsgs($type);
}
/**
* Processes any buffered output, writing it to the log file, echoing it
* out, or both.
*
* @throws LSCMException Thrown indirectly by static::me() call.
* @throws LSCMException Thrown indirectly by $m->p_writeToFile() call.
* @throws LSCMException Thrown indirectly by $m->p_echoEntries() call.
*/
public static function processBuffer()
{
$clear = false;
$m = static::me();
if ( $m->p_getBufferedWrite() ) {
$m->p_writeToFile($m->p_getMsgQueue());
$clear = true;
}
if ( $m->p_getBufferedEcho() ) {
$m->p_echoEntries($m->p_getMsgQueue());
$clear = true;
}
if ( $clear ) {
$m->p_setMsgQueue(array());
}
}
/**
* Deprecated 06/25/19. Visibility going to be changed to "protected".
*
* @deprecated
*
* @param string $msg
* @param int $type
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function addUiMsg( $msg, $type )
{
static::me()->p_addUiMsg($msg, $type);
}
/**
* Calls addUiMsg() with message level static::UI_INFO.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::addUiMsg() call.
*/
public static function uiInfo( $msg )
{
static::addUiMsg($msg, static::UI_INFO);
}
/**
* Calls addUiMsg() with message level static::UI_SUCC.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::addUiMsg() call.
*/
public static function uiSuccess( $msg )
{
static::addUiMsg($msg, static::UI_SUCC);
}
/**
* Calls addUiMsg() with message level static::UI_ERR.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::addUiMsg() call.
*/
public static function uiError( $msg )
{
static::addUiMsg($msg, static::UI_ERR);
}
/**
* Calls addUiMsg() with message level static::UI_WARN.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::addUiMsg() call.
*/
public static function uiWarning( $msg )
{
static::addUiMsg($msg, static::UI_WARN);
}
/**
*
* @param string $msg
* @param int $lvl
*
* @throws LSCMException Thrown indirectly by static::me() call.
* @throws LSCMException Thrown indirectly by static::me()->p_log() call.
*/
public static function logMsg( $msg, $lvl )
{
static::me()->p_log($msg, $lvl);
}
/**
* Calls logMsg() with message level static::L_ERROR.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function error( $msg )
{
static::logMsg($msg, static::L_ERROR);
}
/**
* Calls logMsg() with message level static::L_WARN.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function warn( $msg )
{
static::logMsg($msg, static::L_WARN);
}
/**
* Calls logMsg() with message level static::L_NOTICE.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function notice( $msg )
{
static::logMsg($msg, static::L_NOTICE);
}
/**
* Calls logMsg() with message level static::L_INFO.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function info( $msg )
{
static::logMsg($msg, static::L_INFO);
}
/**
* Calls logMsg() with message level static::L_VERBOSE.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function verbose( $msg )
{
static::logMsg($msg, static::L_VERBOSE);
}
/**
* Calls logMsg() with message level static::L_DEBUG.
*
* @param string $msg
*
* @throws LSCMException Thrown indirectly by static::logMsg() call.
*/
public static function debug( $msg )
{
static::logMsg($msg, static::L_DEBUG);
}
/**
*
* @return Logger|object Object that implements all Logger class public
* functions.
*
* @throws LSCMException Thrown when Logger instance has not yet been
* initialized.
*/
protected static function me()
{
if ( static::$instance == null ) {
throw new LSCMException(
'Logger Uninitialized.',
LSCMException::E_PROGRAM
);
}
return static::$instance;
}
/**
*
* @param string $msg
* @param int $lvl
*
* @throws LSCMException Thrown indirectly by $this->writeToFile() call.
* @throws LSCMException Thrown indirectly by $this->echoEntries() call.
*/
protected function log( $msg, $lvl )
{
$entry = new LogEntry($msg, $lvl);
$this->msgQueue[] = $entry;
if ( !$this->bufferedWrite ) {
$this->writeToFile(array( $entry ));
}
if ( !$this->bufferedEcho ) {
$this->echoEntries(array( $entry ));
}
}
/**
*
* @param LogEntry[]|object[] $entries Array of objects that implements all
* LogEntry class public functions.
*
* @throws LSCMException Thrown indirectly by $e->getOutput() call.
*/
protected function writeToFile( array $entries )
{
$content = '';
foreach ( $entries as $e ) {
$content .= $e->getOutput($this->logFileLvl);
}
if ( $content != '' ) {
if ( $this->logFile ) {
file_put_contents(
$this->logFile,
$content,
FILE_APPEND | LOCK_EX
);
}
else {
error_log($content);
}
}
}
/**
*
* @param LogEntry[]|object[] $entries Array of objects that implement all
* LogEntry class public functions.
*
* @throws LSCMException Thrown indirectly by $entry->getOutput() call.
*/
protected function echoEntries( array $entries )
{
foreach ( $entries as $entry ) {
if ( ($msg = $entry->getOutput($this->logEchoLvl)) !== '' ) {
echo $msg;
}
}
}
/**
*
* @param int $lvl
*
* @return string
*/
public static function getLvlDescr( $lvl )
{
switch ($lvl) {
case static::L_ERROR:
return 'ERROR';
case static::L_WARN:
return 'WARN';
case static::L_NOTICE:
return 'NOTICE';
case static::L_INFO:
return 'INFO';
case static::L_VERBOSE:
return 'DETAIL';
case static::L_DEBUG:
return 'DEBUG';
default:
/**
* Do silently.
*/
return '';
}
}
/**
* Not used yet. Added for later cases where shared log level should be
* changed to match panel log level.
*
* @deprecated 1.9.1 Deprecated on 11/22/19. Function is likely not needed
* after recent logger changes.
*
* @param int $lvl
*
* @return bool
*
* @throws LSCMException Thrown indirectly by static::me() call.
*/
public static function setLogFileLvl( $lvl )
{
$lvl = (int)$lvl;
if ( static::isValidLogFileLvl($lvl) ) {
if ( $lvl > static::L_DEBUG ) {
$lvl = static::L_DEBUG;
}
static::me()->p_setLogFileLvl($lvl);
return true;
}
return false;
}
/**
*
* @param int $lvl
*
* @return bool
*/
protected static function isValidLogFileLvl( $lvl )
{
if ( is_int($lvl) && $lvl >= 0 ) {
return true;
}
return false;
}
/**
* Prevent cloning here and in extending classes.
*/
final protected function __clone() {}
}
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