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/*
* Copyright (C) 2015 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_H
#define _INIT_ACTION_H
#include <map>
#include <queue>
#include <string>
#include <variant>
#include <vector>
#include "builtins.h"
#include "init_parser.h"
#include "keyword_map.h"
namespace android {
namespace init {
class Command {
public:
Command(BuiltinFunction f, const std::vector<std::string>& args, int line);
int InvokeFunc() const;
std::string BuildCommandString() const;
int line() const { return line_; }
private:
BuiltinFunction func_;
std::vector<std::string> args_;
int line_;
};
using EventTrigger = std::string;
using PropertyChange = std::pair<std::string, std::string>;
using BuiltinAction = class Action*;
class Action {
public:
explicit Action(bool oneshot, const std::string& filename, int line);
bool AddCommand(const std::vector<std::string>& args, int line, std::string* err);
void AddCommand(BuiltinFunction f, const std::vector<std::string>& args, int line);
bool InitTriggers(const std::vector<std::string>& args, std::string* err);
bool InitSingleTrigger(const std::string& trigger);
std::size_t NumCommands() const;
void ExecuteOneCommand(std::size_t command) const;
void ExecuteAllCommands() const;
bool CheckEvent(const EventTrigger& event_trigger) const;
bool CheckEvent(const PropertyChange& property_change) const;
bool CheckEvent(const BuiltinAction& builtin_action) const;
std::string BuildTriggersString() const;
void DumpState() const;
bool oneshot() const { return oneshot_; }
const std::string& filename() const { return filename_; }
int line() const { return line_; }
static void set_function_map(const KeywordMap<BuiltinFunction>* function_map) {
function_map_ = function_map;
}
private:
void ExecuteCommand(const Command& command) const;
bool CheckPropertyTriggers(const std::string& name = "",
const std::string& value = "") const;
bool ParsePropertyTrigger(const std::string& trigger, std::string* err);
std::map<std::string, std::string> property_triggers_;
std::string event_trigger_;
std::vector<Command> commands_;
bool oneshot_;
std::string filename_;
int line_;
static const KeywordMap<BuiltinFunction>* function_map_;
};
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_;
};
class ActionParser : public SectionParser {
public:
ActionParser(ActionManager* action_manager)
: action_manager_(action_manager), action_(nullptr) {}
bool ParseSection(std::vector<std::string>&& args, const std::string& filename, int line,
std::string* err) override;
bool ParseLineSection(std::vector<std::string>&& args, int line, std::string* err) override;
void EndSection() override;
private:
ActionManager* action_manager_;
std::unique_ptr<Action> action_;
};
} // namespace init
} // namespace android
#endif
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