refactor(userspace/engine): split rule loader git history (5)

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>

userspace/engine/rule_loader_reader.h

@@ -0,0 +1,37 @@
+/*
+Copyright (C) 2022 The Falco Authors.
+
+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.
+*/
+
+#pragma once
+
+#include <map>
+#include <string>
+#include <vector>
+#include "rule_loader.h"
+
+/*!
+    \brief Reads the contents of a ruleset
+*/
+class rule_reader
+{
+public:
+    virtual ~rule_reader() = default;
+
+    /*!
+		\brief Reads the contents of a ruleset and uses a loader to store
+        thew new definitions
+	*/
+	virtual bool load(rule_loader::configuration& cfg, rule_loader& loader);
+};