Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/cache/strategy/abstract.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * Base class for caching strategy.
+ *
+ *
+ * @author       Time.ly Network, Inc.
+ * @since        2.0
+ * @package      Ai1EC
+ * @subpackage   Ai1EC.Cache.Strategy
+ */
+abstract class Ai1ec_Cache_Strategy extends Ai1ec_Base {
+
+    /**
+     * Retrieves the data store for the passed key
+     *
+     * @param string $key
+     * @throws Ai1ec_Cache_Not_Set_Exception if the key was not set
+     */
+    abstract public function get_data( $key );
+
+    /**
+     * Write the data to the persistence Layer
+     *
+     * @throws Ai1ec_Cache_Write_Exception
+     * @param string $key
+     * @param string $value
+     */
+    abstract public function write_data( $key, $value );
+
+    /**
+     * Deletes the data associated with the key from the persistence layer.
+     *
+     * @param string $key
+     */
+    abstract public function delete_data( $key );
+
+    /**
+     * Delete multiple cache entries matching given pattern
+     *
+     * @param string $pattern Scalar pattern, which shall match key
+     *
+     * @return int Count of entries deleted
+     */
+    abstract public function delete_matching( $pattern );
+
+}