Move ActionManager to its own file

Bug: 36970783
Test: build
Change-Id: I08fa39052236b462249f79de1d02bf02bdbf4c84
diff --git a/init/action_manager.h b/init/action_manager.h
new file mode 100644
index 0000000..5f47a6d
--- /dev/null
+++ b/init/action_manager.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef _INIT_ACTION_MANAGER_H
+#define _INIT_ACTION_MANAGER_H
+
+#include <string>
+#include <vector>
+
+#include "action.h"
+#include "builtins.h"
+
+namespace android {
+namespace init {
+
+class ActionManager {
+  public:
+    static ActionManager& GetInstance();
+
+    // Exposed for testing
+    ActionManager();
+
+    void AddAction(std::unique_ptr<Action> action);
+    void QueueEventTrigger(const std::string& trigger);
+    void QueuePropertyChange(const std::string& name, const std::string& value);
+    void QueueAllPropertyActions();
+    void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
+    void ExecuteOneCommand();
+    bool HasMoreCommands() const;
+    void DumpState() const;
+    void ClearQueue();
+
+  private:
+    ActionManager(ActionManager const&) = delete;
+    void operator=(ActionManager const&) = delete;
+
+    std::vector<std::unique_ptr<Action>> actions_;
+    std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_;
+    std::queue<const Action*> current_executing_actions_;
+    std::size_t current_command_;
+};
+
+}  // namespace init
+}  // namespace android
+
+#endif