Initial commit

wp-content/plugins/wp-mail-smtp/vendor/google/auth/src/CacheTrait.php

@@ -0,0 +1,83 @@
+<?php
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Auth;
+
+trait CacheTrait
+{
+    private $maxKeyLength = 64;
+
+    /**
+     * Gets the cached value if it is present in the cache when that is
+     * available.
+     */
+    private function getCachedValue($k)
+    {
+        if (is_null($this->cache)) {
+            return;
+        }
+
+        $key = $this->getFullCacheKey($k);
+        if (is_null($key)) {
+            return;
+        }
+
+        $cacheItem = $this->cache->getItem($key);
+        if ($cacheItem->isHit()) {
+            return $cacheItem->get();
+        }
+    }
+
+    /**
+     * Saves the value in the cache when that is available.
+     */
+    private function setCachedValue($k, $v)
+    {
+        if (is_null($this->cache)) {
+            return;
+        }
+
+        $key = $this->getFullCacheKey($k);
+        if (is_null($key)) {
+            return;
+        }
+
+        $cacheItem = $this->cache->getItem($key);
+        $cacheItem->set($v);
+        $cacheItem->expiresAfter($this->cacheConfig['lifetime']);
+        return $this->cache->save($cacheItem);
+    }
+
+    private function getFullCacheKey($key)
+    {
+        if (is_null($key)) {
+            return;
+        }
+
+        $key = $this->cacheConfig['prefix'] . $key;
+
+        // ensure we do not have illegal characters
+        $key = preg_replace('|[^a-zA-Z0-9_\.!]|', '', $key);
+
+        // Hash keys if they exceed $maxKeyLength (defaults to 64)
+        if ($this->maxKeyLength && strlen($key) > $this->maxKeyLength) {
+            $key = substr(hash('sha256', $key), 0, $this->maxKeyLength);
+        }
+
+        return $key;
+    }
+}