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A monolog telegram handler that does not have negative impact on response time. Compose log records in a single message. Do not crush if telegram down
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<?php | |
declare(strict_types=1); | |
namespace App\Infra\Monolog; | |
use GuzzleHttp\Client; | |
use Monolog\Handler\AbstractProcessingHandler; | |
use Psr\Log\LoggerInterface; | |
use Symfony\Component\Console\ConsoleEvents; | |
use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
use Symfony\Component\HttpKernel\KernelEvents; | |
use Symfony\Contracts\Service\ResetInterface; | |
class TelegramHandler extends AbstractProcessingHandler implements ResetInterface, EventSubscriberInterface | |
{ | |
private $client; | |
private $token; | |
private $chat; | |
private $records; | |
private $flushThreshold; | |
private $fallbackLogger; | |
public function __construct(int $level, ?string $token, ?int $chat, LoggerInterface $fallbackLogger, int $flushThreshold = 10) | |
{ | |
$this->level = $level; | |
$this->token = $token; | |
$this->chat = $chat; | |
$this->flushThreshold = $flushThreshold; | |
$this->fallbackLogger = $fallbackLogger; | |
$this->client = new Client(); | |
$this->records = []; | |
parent::__construct($level, true); | |
} | |
public function flush(): void | |
{ | |
$records = $this->records; | |
$this->records = []; | |
$message = ''; | |
foreach ($records as $record) { | |
$recordMessage = $record['formatted']; | |
if (mb_strlen($recordMessage) >= 4096) { | |
$recordMessage = mb_substr($recordMessage, 0, 4092).' ...'; | |
} | |
if ((mb_strlen($message) + mb_strlen($recordMessage)) >= 4096) { | |
$this->send($message); | |
$message = ''; | |
} | |
$message .= $recordMessage.PHP_EOL.PHP_EOL; | |
} | |
if ($message) { | |
$this->send($message); | |
} | |
} | |
public function reset(): void | |
{ | |
$this->records = []; | |
parent::reset(); | |
} | |
public static function getSubscribedEvents(): array | |
{ | |
return [ | |
KernelEvents::TERMINATE => ['flush', -512], | |
ConsoleEvents::TERMINATE => ['flush', -512], | |
]; | |
} | |
protected function write(array $record): void | |
{ | |
if (isset($record['context']['skip_telegram_handler']) && $record['context']['skip_telegram_handler']) { | |
return; | |
} | |
if (null === $this->token || null === $this->chat) { | |
return; | |
} | |
$this->records[] = $record; | |
if (count($this->records) >= $this->flushThreshold) { | |
$this->flush(); | |
} | |
} | |
protected function send(string $message): void | |
{ | |
try { | |
$this->client->post('https://api.telegram.org/bot'.$this->token.'/sendMessage', [ | |
'form_params' => [ | |
'chat_id' => $this->chat, | |
'text' => $message, | |
], | |
]); | |
} catch (\Throwable $e) { | |
$this->fallbackLogger->error('telegram_logger: cannot send log message to telegram', [ | |
'skip_telegram_handler' => true, | |
'exception' => $e, | |
]); | |
} | |
} | |
} |
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