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<?php
require_once 'engine/ansi.php';
use \ansi\Color;
use function \ansi\wrap;
enum LogLevel {
case ERROR;
case WARNING;
case INFO;
case DEBUG;
}
function logDebug(...$args): void { logging::logCustom(LogLevel::DEBUG, ...$args); }
function logInfo(...$args): void { logging::logCustom(LogLevel::INFO, ...$args); }
function logWarning(...$args): void { logging::logCustom(LogLevel::WARNING, ...$args); }
function logError(...$args): void { logging::logCustom(LogLevel::ERROR, ...$args); }
class logging {
// private static $instance = null;
protected static ?string $logFile = null;
protected static bool $enabled = false;
protected static int $counter = 0;
/** @var ?callable $filter */
protected static $filter = null;
public static function setLogFile(string $log_file): void {
self::$logFile = $log_file;
}
public static function setErrorFilter(callable $filter): void {
self::$filter = $filter;
}
public static function disable(): void {
self::$enabled = false;
restore_error_handler();
register_shutdown_function(function() {});
}
public static function enable(): void {
self::$enabled = true;
set_error_handler(function($no, $str, $file, $line) {
if (is_callable(self::$filter) && !(self::$filter)($no, $file, $line, $str))
return;
self::write(LogLevel::ERROR, $str,
errno: $no,
errfile: $file,
errline: $line);
});
register_shutdown_function(function() {
if (!($error = error_get_last()))
return;
if (is_callable(self::$filter)
&& !(self::$filter)($error['type'], $error['file'], $error['line'], $error['message'])) {
return;
}
self::write(LogLevel::ERROR, $error['message'],
errno: $error['type'],
errfile: $error['file'],
errline: $error['line']);
});
}
public static function logCustom(LogLevel $level, ...$args): void {
self::write($level, self::strVars($args));
}
protected static function write(LogLevel $level,
string $message,
?int $errno = null,
?string $errfile = null,
?string $errline = null): void {
// TODO test
if (is_null(self::$logFile)) {
fprintf(STDERR, __METHOD__.': logfile is not set');
return;
}
$num = self::$counter++;
$time = time();
// TODO rewrite using sprintf
$exec_time = strval(exectime());
if (strlen($exec_time) < 6)
$exec_time .= str_repeat('0', 6 - strlen($exec_time));
// $bt = backtrace(2);
$title = PHP_SAPI == 'cli' ? 'cli' : $_SERVER['REQUEST_URI'];
$date = date('d/m/y H:i:s', $time);
$buf = '';
if ($num == 0) {
$buf .= wrap(" $title ",
fg: Color::WHITE,
bg: Color::MAGENTA,
fg_bright: true,
bold: true);
$buf .= wrap(" $date ", fg: Color::WHITE, bg: Color::BLUE, fg_bright: true);
$buf .= "\n";
}
$letter = strtoupper($level->name[0]);
$color = match ($level) {
LogLevel::ERROR => Color::RED,
LogLevel::INFO, LogLevel::DEBUG => Color::WHITE,
LogLevel::WARNING => Color::YELLOW
};
$buf .= wrap($letter.wrap('='.wrap($num, bold: true)), fg: $color).' ';
$buf .= wrap($exec_time, fg: Color::CYAN).' ';
if (!is_null($errno)) {
$buf .= wrap($errfile, fg: Color::GREEN);
$buf .= wrap(':', fg: Color::WHITE);
$buf .= wrap($errline, fg: Color::GREEN, fg_bright: true);
$buf .= ' ('.self::getPhpErrorName($errno).') ';
}
$buf .= $message."\n";
if (in_array($level, [LogLevel::ERROR, LogLevel::WARNING]))
$buf .= backtrace(2)."\n";
// TODO test
$set_perm = !file_exists(self::$logFile);
$f = fopen(self::$logFile, 'a');
if (!$f) {
fprintf(STDERR, __METHOD__.': failed to open file "'.self::$logFile.'" for writing');
return;
}
fwrite($f, $buf);
fclose($f);
if ($set_perm)
setperm(self::$logFile);
}
protected static function getPhpErrorName(int $errno): string {
static $errors = null;
if (is_null($errors))
$errors = array_flip(array_slice(get_defined_constants(true)['Core'], 0, 15, true));
return $errors[$errno];
}
protected static function strVarDump($var, bool $print_r = false): string {
ob_start();
$print_r ? print_r($var) : var_dump($var);
return trim(ob_get_clean());
}
protected static function strVars(array $args): string {
$args = array_map(fn($a) => match (gettype($a)) {
'string' => $a,
'array', 'object' => self::strVarDump($a, true),
default => self::strVarDump($a)
}, $args);
return implode(' ', $args);
}
}
function backtrace(int $shift = 0): string {
$bt = debug_backtrace();
$lines = [];
foreach ($bt as $i => $t) {
if ($i < $shift)
continue;
if (!isset($t['file'])) {
$lines[] = 'from ?';
} else {
$lines[] = 'from '.$t['file'].':'.$t['line'];
}
}
return implode("\n", $lines);
}
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