--- /dev/null
+<?php
+
+namespace Drupal\redirect_404\Render;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\DependencyInjection\DependencySerializationTrait;
+use Drupal\Core\Logger\LoggerChannelFactory;
+use Drupal\Core\Logger\LoggerChannelFactoryInterface;
+use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
+
+/**
+ * Allows 'page not found' events to be suppressed by returning a NullLogger.
+ */
+class Redirect404LogSuppressor implements LoggerChannelFactoryInterface {
+ use DependencySerializationTrait;
+
+ /**
+ * The logger channel factory.
+ *
+ * @var \Drupal\Core\Logger\LoggerChannelFactoryInterface
+ */
+ protected $loggerChannelFactory;
+
+ /**
+ * The configuration factory.
+ *
+ * @var \Drupal\Core\Config\ConfigFactoryInterface
+ */
+ protected $configFactory;
+
+ /**
+ * Constructs a Redirect404LogSuppressor object.
+ *
+ * @param \Drupal\Core\Logger\LoggerChannelFactoryInterface $logger_channel_factory
+ * The logger channel factory.
+ * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+ * The configuration factory.
+ */
+ public function __construct(LoggerChannelFactoryInterface $logger_channel_factory, ConfigFactoryInterface $config_factory) {
+ $this->loggerChannelFactory = $logger_channel_factory;
+ $this->configFactory = $config_factory;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function get($channel) {
+ if ($channel == 'page not found' && $this->configFactory->get('redirect_404.settings')->get('suppress_404')) {
+ // Do not log if a 404 error is detected and the suppress_404 is enabled.
+ return new NullLogger();
+ }
+
+ // Call LoggerChannelFactory to let the default logger workflow proceed.
+ return $this->loggerChannelFactory->get($channel);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function addLogger(LoggerInterface $logger, $priority = 0) {
+ $this->loggerChannelFactory->addLogger($logger, $priority);
+ }
+
+}