From 876858b5154a4539dfe9d6e0dbadda762228204b Mon Sep 17 00:00:00 2001
From: Timothy J Warren <tim@timshomepage.net>
Date: Tue, 17 Jan 2017 11:21:07 -0500
Subject: [PATCH] Add APCu driver

---
 src/Driver/ApcuDriver.php       | 133 ++++++++++++++++++++++++++++++++
 tests/Driver/ApcuDriverTest.php |  28 +++++++
 2 files changed, 161 insertions(+)
 create mode 100644 src/Driver/ApcuDriver.php
 create mode 100644 tests/Driver/ApcuDriverTest.php

diff --git a/src/Driver/ApcuDriver.php b/src/Driver/ApcuDriver.php
new file mode 100644
index 0000000..08a077b
--- /dev/null
+++ b/src/Driver/ApcuDriver.php
@@ -0,0 +1,133 @@
+<?php declare(strict_types=1);
+/**
+ * Banker
+ *
+ * A Caching library implementing psr/cache
+ *
+ * PHP version 7.0
+ *
+ * @package     Banker
+ * @author      Timothy J. Warren <tim@timshomepage.net>
+ * @copyright   2016  Timothy J. Warren
+ * @license     http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @version     1.0.0
+ * @link        https://git.timshomepage.net/timw4mail/banker
+ */
+
+namespace Aviat\Banker\Driver;
+
+use Aviat\Banker\Exception\CacheException;
+
+
+/**
+ * Memcached cache backend
+ */
+class ApcuDriver extends AbstractDriver {
+
+	/**
+	 * See if a key currently exists in the cache
+	 *
+	 * @param string $key
+	 * @return bool
+	 */
+	public function exists(string $key): bool
+	{
+		return apcu_exists($key) !== FALSE;
+	}
+
+	/**
+	 * Get the value for the selected cache key
+	 *
+	 * @param string $key
+	 * @return mixed
+	 */
+	public function get(string $key)
+	{
+		return apcu_fetch($key);
+	}
+
+	/**
+	 * Retrieve a set of values by their cache key
+	 *
+	 * @param string[] $keys
+	 * @return array
+	 */
+	public function getMultiple(array $keys = []): array
+	{
+		return apcu_fetch($keys);
+	}
+
+	/**
+	 * Set a cached value
+	 *
+	 * @param string $key
+	 * @param mixed $value
+	 * @param int $expires
+	 * @return DriverInterface
+	 */
+	public function set(string $key, $value, int $expires = 0): DriverInterface
+	{
+		if ( ! apcu_exists($key))
+		{
+			apcu_add($key, $value, $expires);
+		}
+		else
+		{
+			apcu_store($key, $value, $expires);
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Remove an item from the cache
+	 *
+	 * @param string $key
+	 * @return boolean
+	 */
+	public function delete(string $key): bool
+	{
+		return apcu_delete($key);
+	}
+
+	/**
+	 * Remove multiple items from the cache
+	 *
+	 * @param string[] $keys
+	 * @return boolean
+	 */
+	public function deleteMultiple(array $keys = []): bool
+	{
+		return apcu_delete($keys);
+	}
+
+	/**
+	 * Empty the cache
+	 *
+	 * @return boolean
+	 */
+	public function flush(): bool
+	{
+		return apcu_clear_cache();
+	}
+
+	/**
+	 * Set the specified key to expire at the given time
+	 *
+	 * @param string $key
+	 * @param int $expires
+	 * @return boolean
+	 */
+	public function expiresAt(string $key, int $expires): bool
+	{
+		if ($this->exists($key))
+		{
+			$value = $this->get($key);
+			return apcu_store($key, $value, $expires);
+		}
+
+		$this->getLogger()->warn("Tried to set expiration on a key that does not exist");
+
+		return FALSE;
+	}
+}
diff --git a/tests/Driver/ApcuDriverTest.php b/tests/Driver/ApcuDriverTest.php
new file mode 100644
index 0000000..1ee33df
--- /dev/null
+++ b/tests/Driver/ApcuDriverTest.php
@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+/**
+ * Banker
+ *
+ * A Caching library implementing psr/cache
+ *
+ * PHP version 7.0
+ *
+ * @package     Banker
+ * @author      Timothy J. Warren <tim@timshomepage.net>
+ * @copyright   2016  Timothy J. Warren
+ * @license     http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @version     1.0.0
+ * @link        https://git.timshomepage.net/timw4mail/banker
+ */
+
+namespace Aviat\Banker\Tests\Driver;
+
+use Aviat\Banker\Driver\ApcuDriver;
+
+class ApcuDriverTest extends DriverTestBase {
+
+	public function setup()
+	{
+		$this->driver = new ApcuDriver();
+		$this->driver->flush();
+	}
+}