CacheDriver: moved to subdirectory

inc/Data/Driver/Cache/MemcacheCacheDriver.php

@@ -0,0 +1,74 @@
+<?php
+namespace Vichan\Data\Driver\Cache;
+
+defined('TINYBOARD') or exit;
+
+
+class MemcachedCacheDriver implements CacheDriver {
+	use CacheDriverTrait;
+
+	private \Memcached $inner;
+
+
+	public function __construct(string $prefix, string $server_uri, int $server_port, int $server_weight) {
+		$this->inner = new \Memcached();
+		if (!$this->inner->setOption(\Memcached::OPT_BINARY_PROTOCOL, true)) {
+			$err = $this->inner->getResultMessage();
+			throw new \RuntimeException("Unable to set the memcached protocol: '$err'");
+		}
+		if (!$this->inner->setOption(\Memcached::OPT_PREFIX_KEY, $prefix)) {
+			$err = $this->inner->getResultMessage();
+			throw new \RuntimeException("Unable to set the memcached prefix: '$err'");
+		}
+
+		$maybe_unix_path = self::asUnixSocketPath($server_uri);
+		$is_unix = $maybe_unix_path !== null;
+		if ($is_unix) {
+			$server_uri = $maybe_unix_path;
+		}
+
+		// Memcached keeps the server connections open across requests.
+		$current_servers = $this->inner->getServerList();
+		$found_in_curr = false;
+		foreach ($current_servers as $curr) {
+			// Ignore the port if the server is connected with a unix socket.
+			if ($curr['host'] === $server_uri && ($is_unix || $curr['port'] === $server_port)) {
+				$found_in_curr = true;
+			}
+		}
+
+		if (!$found_in_curr) {
+			if (!empty($current_servers)) {
+				if (!$this->inner->resetServerList()) {
+					$err = $this->inner->getResultMessage();
+					throw new \RuntimeException("Unable to reset the memcached server list: '$err'");
+				}
+			}
+			if (!$this->inner->addServer($server_uri, $server_port, $server_weight)) {
+				$err = $this->inner->getResultMessage();
+				throw new \RuntimeException("Unable to add memcached servers: '$err'");
+			}
+		}
+	}
+
+	public function get(string $key): mixed {
+		$ret = $this->inner->get($key);
+		// If the returned value is false but the retrival was a success, then the value stored was a boolean false.
+		if ($ret === false && $this->inner->getResultCode() !== \Memcached::RES_SUCCESS) {
+			return null;
+		}
+		return $ret;
+	}
+
+	public function set(string $key, mixed $value, mixed $expires = false): void {
+		$this->inner->set($key, $value, (int)$expires);
+	}
+
+	public function delete(string $key): void {
+		$this->inner->delete($key);
+	}
+
+	public function flush(): void {
+		$this->inner->flush();
+	}
+}