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/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* 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 <memory>
#include <vector>
#include <ctl-config.h>
#include "observer.hpp"
class Signal;
//TODO: claneys: define observer and observable interface then inherit
class Signal: public Observer, public Subject
{
private:
std::string id_;
std::vector<std::string> sources_;
std::map<long, double> history_; ///< history_ - Hold signal value history in map with <timestamp, value>
double frequency_;
std::string unit_;
CtlActionT* onReceived_;
std::vector<std::shared_ptr<Signal>> observers_;
int recursionCheck(const std::string& origId);
public:
Signal();
Signal(const std::string& id, std::vector<std::string>& sources, const std::string& unit, double frequency, CtlActionT* onReceived);
explicit operator bool() const;
std::string id() const;
int recursionCheck();
/* virtual */ void update(double timestamp, double value);
virtual double average() const;
virtual double min() const;
virtual double max() const;
double lastValue() const;
};
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