X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fseekat;a=blobdiff_plain;f=lib%2FAPI%2FCall%2FCache.php;fp=lib%2FAPI%2FCall%2FCache.php;h=b80217297e76130eaf176a30efc477c42221fcf3;hp=0000000000000000000000000000000000000000;hb=2451d97f1cb7b97e445b4dd839835b8673a4d0fc;hpb=3958595e9ff27162ae918db1453ddecd4840d481

diff --git a/lib/API/Call/Cache.php b/lib/API/Call/Cache.php
new file mode 100644
index 0000000..b802172
--- /dev/null
+++ b/lib/API/Call/Cache.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace seekat\API\Call;
+
+use http\Client\Request;
+use http\Client\Response;
+use seekat\API\Call\Cache\Control;
+use seekat\API\Call\Cache\Service;
+use seekat\API\Call\Cache\Service\Hollow;
+
+
+class Cache
+{
+	/**
+	 * @var Service
+	 */
+	private $cache;
+
+	/**
+	 * @param Service $cache
+	 */
+	public function __construct(Service $cache = null) {
+		$this->cache = $cache ?? new Hollow;
+	}
+
+	/**
+	 * Save call data
+	 * @param Request $request
+	 * @param Response $response
+	 * @return bool
+	 */
+	public function save(Request $request, Response $response) : bool {
+		$ctl = new Control($request);
+		if (!$ctl->isValid()) {
+			return false;
+		}
+
+		$time = time();
+		if ($time - 1 <= $response->getHeader("X-Cache-Time")) {
+			return true;
+		}
+		$response->setHeader("X-Cache-Time", $time);
+
+		return $this->cache->store($ctl->getKey(), $response);
+	}
+
+	/**
+	 * Attempt to load call data
+	 * @param Request $request
+	 * @param Response $response out param
+	 * @return bool
+	 */
+	public function load(Request $request, Response &$response = null) : bool {
+		$ctl = new Control($request);
+		if (!$ctl->isValid()) {
+			return false;
+		}
+
+		if (!$this->cache->fetch($ctl->getKey(), $response)) {
+			return false;
+		}
+		if ($ctl->isStale($response)) {
+			if (($lmod = $response->getHeader("Last-Modified"))) {
+				$request->setOptions(["lastmodified" => strtotime($lmod)]);
+			}
+			if (($etag = $response->getHeader("ETag"))) {
+				$request->setOptions(["etag" => $etag]);
+			}
+			return false;
+		}
+		return true;
+	}
+
+}