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<?php
namespace Illuminate\Log;
use Closure;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Log\Events\MessageLogged;
use Psr\Log\LoggerInterface;
use RuntimeException;
class Logger implements LoggerInterface
{
/**
* The underlying logger implementation.
*
* @var \Psr\Log\LoggerInterface
*/
protected $logger;
/**
* The event dispatcher instance.
*
* @var \Illuminate\Contracts\Events\Dispatcher|null
*/
protected $dispatcher;
/**
* Any context to be added to logs.
*
* @var array
*/
protected $context = [];
/**
* Create a new log writer instance.
*
* @param \Psr\Log\LoggerInterface $logger
* @param \Illuminate\Contracts\Events\Dispatcher|null $dispatcher
* @return void
*/
public function __construct(LoggerInterface $logger, Dispatcher $dispatcher = null)
{
$this->logger = $logger;
$this->dispatcher = $dispatcher;
}
/**
* Log an emergency message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function emergency($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log an alert message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function alert($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log a critical message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function critical($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log an error message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function error($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log a warning message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function warning($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log a notice to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function notice($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log an informational message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function info($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log a debug message to the logs.
*
* @param string $message
* @param array $context
* @return void
*/
public function debug($message, array $context = [])
{
$this->writeLog(__FUNCTION__, $message, $context);
}
/**
* Log a message to the logs.
*
* @param string $level
* @param string $message
* @param array $context
* @return void
*/
public function log($level, $message, array $context = [])
{
$this->writeLog($level, $message, $context);
}
/**
* Dynamically pass log calls into the writer.
*
* @param string $level
* @param string $message
* @param array $context
* @return void
*/
public function write($level, $message, array $context = [])
{
$this->writeLog($level, $message, $context);
}
/**
* Write a message to the log.
*
* @param string $level
* @param string $message
* @param array $context
* @return void
*/
protected function writeLog($level, $message, $context)
{
$this->logger->{$level}(
$message = $this->formatMessage($message),
$context = array_merge($this->context, $context)
);
$this->fireLogEvent($level, $message, $context);
}
/**
* Add context to all future logs.
*
* @param array $context
* @return $this
*/
public function withContext(array $context = [])
{
$this->context = array_merge($this->context, $context);
return $this;
}
/**
* Flush the existing context array.
*
* @return $this
*/
public function withoutContext()
{
$this->context = [];
return $this;
}
/**
* Register a new callback handler for when a log event is triggered.
*
* @param \Closure $callback
* @return void
*
* @throws \RuntimeException
*/
public function listen(Closure $callback)
{
if (! isset($this->dispatcher)) {
throw new RuntimeException('Events dispatcher has not been set.');
}
$this->dispatcher->listen(MessageLogged::class, $callback);
}
/**
* Fires a log event.
*
* @param string $level
* @param string $message
* @param array $context
* @return void
*/
protected function fireLogEvent($level, $message, array $context = [])
{
// If the event dispatcher is set, we will pass along the parameters to the
// log listeners. These are useful for building profilers or other tools
// that aggregate all of the log messages for a given "request" cycle.
if (isset($this->dispatcher)) {
$this->dispatcher->dispatch(new MessageLogged($level, $message, $context));
}
}
/**
* Format the parameters for the logger.
*
* @param mixed $message
* @return mixed
*/
protected function formatMessage($message)
{
if (is_array($message)) {
return var_export($message, true);
} elseif ($message instanceof Jsonable) {
return $message->toJson();
} elseif ($message instanceof Arrayable) {
return var_export($message->toArray(), true);
}
return $message;
}
/**
* Get the underlying logger implementation.
*
* @return \Psr\Log\LoggerInterface
*/
public function getLogger()
{
return $this->logger;
}
/**
* Get the event dispatcher instance.
*
* @return \Illuminate\Contracts\Events\Dispatcher
*/
public function getEventDispatcher()
{
return $this->dispatcher;
}
/**
* Set the event dispatcher instance.
*
* @param \Illuminate\Contracts\Events\Dispatcher $dispatcher
* @return void
*/
public function setEventDispatcher(Dispatcher $dispatcher)
{
$this->dispatcher = $dispatcher;
}
/**
* Dynamically proxy method calls to the underlying logger.
*
* @param string $method
* @param array $parameters
* @return mixed
*/
public function __call($method, $parameters)
{
return $this->logger->{$method}(...$parameters);
}
}
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