1 files changed, 74 insertions, 0 deletions
diff --git a/lib/private/Diagnostics/QueryLogger.php b/lib/private/Diagnostics/QueryLogger.php
new file mode 100644
index 00000000000..5efe99d1a74
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+++ b/lib/private/Diagnostics/QueryLogger.php
@@ -0,0 +1,74 @@
+<?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 OCP\Cache\CappedMemoryCache;
+use OCP\Diagnostics\IQueryLogger;
+
+class QueryLogger implements IQueryLogger {
+	protected int $index = 0;
+	protected ?Query $activeQuery = null;
+	/** @var CappedMemoryCache<Query> */
+	protected CappedMemoryCache $queries;
+
+	/**
+	 * QueryLogger constructor.
+	 */
+	public function __construct() {
+		$this->queries = new CappedMemoryCache(1024);
+	}
+
+
+	/**
+	 * @var bool - Module needs to be activated by some app
+	 */
+	private $activated = false;
+
+	/**
+	 * @inheritdoc
+	 */
+	public function startQuery($sql, ?array $params = null, ?array $types = null) {
+		if ($this->activated) {
+			$this->activeQuery = new Query($sql, $params, microtime(true), $this->getStack());
+		}
+	}
+
+	private function getStack() {
+		$stack = debug_backtrace();
+		array_shift($stack);
+		array_shift($stack);
+		array_shift($stack);
+		return $stack;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function stopQuery() {
+		if ($this->activated && $this->activeQuery) {
+			$this->activeQuery->end(microtime(true));
+			$this->queries[(string)$this->index] = $this->activeQuery;
+			$this->index++;
+			$this->activeQuery = null;
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function getQueries() {
+		return $this->queries->getData();
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function activate() {
+		$this->activated = true;
+	}
+}