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<?php
namespace Wcms;
use RuntimeException;
use Throwable;
/**
* Class used to log messages.
* It must be init once at the very beginning of the application.
*/
class Logger
{
private static $file = false;
private static $verbosity = 4;
/**
* Initialize the logger by openning the file and setting the log level.
*
* @param string $path the logfile's path
* @param int $verbosity 0: no log, 1: errors only, 2: add warn, 3: add info, 4: add debug.
* @throws RuntimeException if failed to create logfile.
*/
public static function init(string $path, int $verbosity = 4): void
{
if (!is_dir(dirname($path))) {
throw new RuntimeException("Parent directory of '$path' does not exist.");
}
if (!is_writable(dirname($path))) {
throw new RuntimeException("Parent directory of '$path' is not writable.");
}
if (is_file($path) && !is_writable($path)) {
throw new RuntimeException("The logfile '$path' is not writable.");
}
self::$file = fopen($path, "a");
if (self::$file === false) {
}
self::$verbosity = $verbosity;
}
protected static function write(string $level, string $msg, array $args = [])
{
$caller = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1];
$pwd = getcwd() . DIRECTORY_SEPARATOR;
$args = array_merge([
"[ $level ]",
str_replace($pwd, '', $caller['file']),
$caller['line']
], $args);
vfprintf(self::$file, date('c') . " %-9s %s(%d) $msg\n", $args);
}
protected static function exceptionmessage(Throwable $e): string
{
return "{$e->getMessage()} in {$e->getFile()}({$e->getLine()})";
}
/**
* Log an error message using printf format.
*/
public static function error(string $msg, ...$args)
{
if (self::$verbosity > 0) {
self::write('ERROR', $msg, $args);
}
}
/**
* Log a warning message using printf format.
*/
public static function warning(string $msg, ...$args)
{
if (self::$verbosity > 1) {
self::write('WARN', $msg, $args);
}
}
/**
* Log an info message using printf format.
*/
public static function info(string $msg, ...$args)
{
if (self::$verbosity > 2) {
self::write('INFO', $msg, $args);
}
}
/**
* Log a debug message using printf format.
*/
public static function debug(string $msg, ...$args)
{
if (self::$verbosity > 3) {
self::write('DEBUG', $msg, $args);
}
}
/**
* Log an exception as an error.
*/
public static function errorex(Throwable $e, bool $withtrace = false)
{
if (self::$verbosity > 0) {
$msg = self::exceptionmessage($e);
if ($withtrace) {
// TODO: Maybe print a more beautiful stack trace.
$msg .= PHP_EOL . $e->getTraceAsString();
}
self::write('ERROR', $msg);
}
}
/**
* Log an exception as a warning.
*/
public static function warningex(Throwable $e)
{
if (self::$verbosity > 1) {
self::write('WARN', self::exceptionmessage($e));
}
}
/**
* Log an exception as an info.
*/
public static function infoex(Throwable $e)
{
if (self::$verbosity > 2) {
self::write('INFO', self::exceptionmessage($e));
}
}
/**
* Log an exception as a debug.
*/
public static function debugex(Throwable $e)
{
if (self::$verbosity > 3) {
self::write('DEBUG', self::exceptionmessage($e));
}
}
}
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