Imported code from old repository

classes/Injectables/CacheBridge.php

@@ -0,0 +1,74 @@
+<?php
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ 
+namespace CloudObjects\PhpMAE\Injectables;
+
+use Psr\SimpleCache\CacheInterface, Psr\SimpleCache\CacheException;
+use Psr\Http\Message\MessageInterface;
+use Doctrine\Common\Cache\Cache;
+use GuzzleHttp\Psr7;
+
+class CacheBridge implements CacheInterface {
+
+    private $cache;
+    private $prefix;
+
+    public function __construct(Cache $cache, string $prefix) {
+        $this->cache = $cache;
+        $this->prefix = $prefix;
+    }
+
+    public function get($key, $default = null) {
+        $value = $this->cache->fetch($this->prefix.$key);
+        if (is_array($value) && isset($value['container']) && isset($value['body'])
+                && is_object($value['container']) && is_a($value['container'], MessageInterface::class)
+                && is_string($value['body'])) {
+            // Convert message interface back
+            $stream = Psr7\stream_for($value['body']);
+            $value = $value['container']
+                ->withBody($stream);
+        }
+        return ($value === false ? $default : $value);
+    }
+
+    public function set($key, $value, $ttl = null) {
+        if (is_object($value) && is_a($value, MessageInterface::class)) {
+            // Read full stream for caching
+            $stream = $value->getBody();
+            $value = [
+                'container' => $value,
+                'body' => $stream->getContents()
+            ];
+            $stream->rewind();
+        }
+        return $this->cache->save($this->prefix.$key, $value, $ttl);
+    }
+
+    public function delete($key) {
+        throw new CacheException("This method is not implemented.");
+    }
+
+    public function clear() {
+        throw new CacheException("This method is not implemented.");
+    }
+
+    public function getMultiple($keys, $default = null) {
+        throw new CacheException("This method is not implemented.");
+    }
+
+    public function setMultiple($values, $ttl = null) {
+        throw new CacheException("This method is not implemented.");
+    }
+
+    public function deleteMultiple($keys) {
+        throw new CacheException("This method is not implemented.");
+    }
+
+    public function has($key) {
+        return $this->cache->contains($this->prefix.$key);
+    }
+
+}