1 files changed, 179 insertions, 0 deletions
diff --git a/lib/private/Memcache/LoggerWrapperCache.php b/lib/private/Memcache/LoggerWrapperCache.php
new file mode 100644
index 00000000000..c2a06731910
--- /dev/null
+++ b/lib/private/Memcache/LoggerWrapperCache.php
@@ -0,0 +1,179 @@
+<?php
+
+declare(strict_types = 1);
+/**
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OC\Memcache;
+
+use OCP\IMemcacheTTL;
+
+/**
+ * Cache wrapper that logs the cache operation in a log file
+ */
+class LoggerWrapperCache extends Cache implements IMemcacheTTL {
+	/** @var Redis */
+	protected $wrappedCache;
+
+	/** @var string $logFile */
+	private $logFile;
+
+	/** @var string $prefix */
+	protected $prefix;
+
+	public function __construct(Redis $wrappedCache, string $logFile) {
+		parent::__construct($wrappedCache->getPrefix());
+		$this->wrappedCache = $wrappedCache;
+		$this->logFile = $logFile;
+	}
+
+	/**
+	 * @return string Prefix used for caching purposes
+	 */
+	public function getPrefix() {
+		return $this->prefix;
+	}
+
+	protected function getNameSpace() {
+		return $this->prefix;
+	}
+
+	/** @inheritDoc */
+	public function get($key) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::get::' . $key . "\n",
+			FILE_APPEND
+		);
+		return $this->wrappedCache->get($key);
+	}
+
+	/** @inheritDoc */
+	public function set($key, $value, $ttl = 0) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::set::' . $key . '::' . $ttl . '::' . json_encode($value) . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->set($key, $value, $ttl);
+	}
+
+	/** @inheritDoc */
+	public function hasKey($key) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::hasKey::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->hasKey($key);
+	}
+
+	/** @inheritDoc */
+	public function remove($key) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::remove::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->remove($key);
+	}
+
+	/** @inheritDoc */
+	public function clear($prefix = '') {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::clear::' . $prefix . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->clear($prefix);
+	}
+
+	/** @inheritDoc */
+	public function add($key, $value, $ttl = 0) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::add::' . $key . '::' . $value . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->add($key, $value, $ttl);
+	}
+
+	/** @inheritDoc */
+	public function inc($key, $step = 1) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::inc::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->inc($key, $step);
+	}
+
+	/** @inheritDoc */
+	public function dec($key, $step = 1) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::dec::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->dec($key, $step);
+	}
+
+	/** @inheritDoc */
+	public function cas($key, $old, $new) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::cas::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->cas($key, $old, $new);
+	}
+
+	/** @inheritDoc */
+	public function cad($key, $old) {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::cad::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->cad($key, $old);
+	}
+
+	/** @inheritDoc */
+	public function ncad(string $key, mixed $old): bool {
+		file_put_contents(
+			$this->logFile,
+			$this->getNameSpace() . '::ncad::' . $key . "\n",
+			FILE_APPEND
+		);
+
+		return $this->wrappedCache->cad($key, $old);
+	}
+
+	/** @inheritDoc */
+	public function setTTL(string $key, int $ttl) {
+		$this->wrappedCache->setTTL($key, $ttl);
+	}
+
+	public function getTTL(string $key): int|false {
+		return $this->wrappedCache->getTTL($key);
+	}
+
+	public function compareSetTTL(string $key, mixed $value, int $ttl): bool {
+		return $this->wrappedCache->compareSetTTL($key, $value, $ttl);
+	}
+
+	public static function isAvailable(): bool {
+		return true;
+	}
+}