1 files changed, 119 insertions, 0 deletions
diff --git a/lib/private/Diagnostics/EventLogger.php b/lib/private/Diagnostics/EventLogger.php
new file mode 100644
index 00000000000..3ec35a5e9ce
--- /dev/null
+++ b/lib/private/Diagnostics/EventLogger.php
@@ -0,0 +1,119 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OC\Diagnostics;
+
+use OC\Log;
+use OC\SystemConfig;
+use OCP\Diagnostics\IEvent;
+use OCP\Diagnostics\IEventLogger;
+use Psr\Log\LoggerInterface;
+
+class EventLogger implements IEventLogger {
+	/** @var Event[] */
+	private $events = [];
+
+	/** @var SystemConfig */
+	private $config;
+
+	/** @var LoggerInterface */
+	private $logger;
+
+	/** @var Log */
+	private $internalLogger;
+
+	/**
+	 * @var bool - Module needs to be activated by some app
+	 */
+	private $activated = false;
+
+	public function __construct(SystemConfig $config, LoggerInterface $logger, Log $internalLogger) {
+		$this->config = $config;
+		$this->logger = $logger;
+		$this->internalLogger = $internalLogger;
+
+		if ($this->isLoggingActivated()) {
+			$this->activate();
+		}
+	}
+
+	public function isLoggingActivated(): bool {
+		$systemValue = (bool)$this->config->getValue('diagnostics.logging', false)
+			|| (bool)$this->config->getValue('profiler', false);
+
+		if ($systemValue && $this->config->getValue('debug', false)) {
+			return true;
+		}
+
+		$isDebugLevel = $this->internalLogger->getLogLevel([], '') === Log::DEBUG;
+		return $systemValue && $isDebugLevel;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function start($id, $description = '') {
+		if ($this->activated) {
+			$this->events[$id] = new Event($id, $description, microtime(true));
+			$this->writeLog($this->events[$id]);
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function end($id) {
+		if ($this->activated && isset($this->events[$id])) {
+			$timing = $this->events[$id];
+			$timing->end(microtime(true));
+			$this->writeLog($timing);
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function log($id, $description, $start, $end) {
+		if ($this->activated) {
+			$this->events[$id] = new Event($id, $description, $start);
+			$this->events[$id]->end($end);
+			$this->writeLog($this->events[$id]);
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function getEvents() {
+		return $this->events;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function activate() {
+		$this->activated = true;
+	}
+
+	private function writeLog(IEvent $event) {
+		if ($this->activated) {
+			if ($event->getEnd() === null) {
+				return;
+			}
+			$duration = $event->getDuration();
+			$timeInMs = round($duration * 1000, 4);
+
+			$loggingMinimum = (int)$this->config->getValue('diagnostics.logging.threshold', 0);
+			if ($loggingMinimum === 0 || $timeInMs < $loggingMinimum) {
+				return;
+			}
+
+			$message = microtime() . ' - ' . $event->getId() . ': ' . $timeInMs . ' (' . $event->getDescription() . ')';
+			$this->logger->debug($message, ['app' => 'diagnostics']);
+		}
+	}
+}