SimpleLogger.php

SimpleLogger.php

<?php

use Psr\Log\LoggerInterface;
use Psr\Log\LogLevel;

class SimpleFileLogger implements LoggerInterface
{
    protected string $path;
    protected int $maxLines = 1000;

    public function __construct(string $logFilePath)
    {
        $this->path = $logFilePath;
    }

    // --- PSR-3 Required Methods ---
    public function emergency(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::EMERGENCY, $message, $context);
    }
    public function alert(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::ALERT, $message, $context);
    }
    public function critical(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::CRITICAL, $message, $context);
    }
    public function error(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::ERROR, $message, $context);
    }
    public function warning(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::WARNING, $message, $context);
    }
    public function notice(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::NOTICE, $message, $context);
    }
    public function info(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::INFO, $message, $context);
    }
    public function debug(string|\Stringable $message, array $context = []): void
    {
        $this->log(LogLevel::DEBUG, $message, $context);
    }

    public function log($level, string|\Stringable $message, array $context = []): void
    {
        $message = $this->interpolate($message, $context);

        $logLine = sprintf(
            '[%s] [%s]: %s%s',
            (new \DateTimeImmutable())->format('Y-m-d H:i:s'),
            strtoupper((string) $level),
            trim($message),
            PHP_EOL
        );

        // Ensure file exists
        if (!file_exists($this->path)) {
            touch($this->path);
        }

        // Append new line
        file_put_contents($this->path, $logLine, FILE_APPEND);

        // Trim old lines if file is too long
        $this->trimLogFile();
    }

    protected function trimLogFile(): void
    {
        $lines = @file($this->path, FILE_IGNORE_NEW_LINES);
        if ($lines === false) {
            return;
        }

        $count = count($lines);
        if ($count > $this->maxLines) {
            // Keep only the last N lines
            $lines = array_slice($lines, -$this->maxLines);
            file_put_contents($this->path, implode(PHP_EOL, $lines) . PHP_EOL, LOCK_EX);
        }
    }

    protected function interpolate(string|\Stringable $message, array $context = []): string
    {
        if (empty($context)) {
            return $message;
        }

        $replace = [];
        foreach ($context as $key => $val) {
            $replace['{' . $key . '}'] = is_scalar($val) ? $val : json_encode($val);
        }

        return strtr($message, $replace);
    }
}


// $logger = new SimpleFileLogger(__DIR__ . '/logs/google.log');
// $logger->alert('Alert message');