model.hpp

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/*
 * Copyright 2020 Robert Bosch GmbH
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#pragma once
 
#include <fable/confable.hpp>  // for Confable
 
#include <cloe/cloe_fwd.hpp>  // for Sync, Registrar
#include <cloe/core.hpp>      // for Duration, Error
#include <cloe/entity.hpp>    // for Entity
 
namespace cloe {
 
class ModelError : public Error {
 public:
  using Error::Error;
  virtual ~ModelError() noexcept = default;
 
  ModelError explanation(std::string explanation) && {
    this->set_explanation(std::move(explanation));
    return std::move(*this);
  }
 
  template <typename... Args>
  ModelError explanation(std::string_view format, Args&&... args) && {
    this->set_explanation(fmt::format(fmt::runtime(format), std::forward<Args>(args)...));
    return std::move(*this);
  }
};
 
class ModelAbort : public ModelError {
 public:
  using ModelError::ModelError;
  virtual ~ModelAbort() noexcept = default;
 
  ModelAbort explanation(std::string explanation) && {
    this->set_explanation(std::move(explanation));
    return std::move(*this);
  }
 
  template <typename... Args>
  ModelAbort explanation(std::string_view format, Args&&... args) && {
    this->set_explanation(fmt::format(fmt::runtime(format), std::forward<Args>(args)...));
    return std::move(*this);
  }
};
 
class ModelReset : public ModelError {
 public:
  using ModelError::ModelError;
  virtual ~ModelReset() noexcept = default;
 
  ModelReset explanation(std::string explanation) && {
    this->set_explanation(std::move(explanation));
    return std::move(*this);
  }
 
  template <typename... Args>
  ModelReset explanation(std::string_view format, Args&&... args) && {
    this->set_explanation(fmt::format(fmt::runtime(format), std::forward(args)...));
    return std::move(*this);
  }
};
 
class ModelStop : public ModelError {
 public:
  using ModelError::ModelError;
  virtual ~ModelStop() noexcept = default;
 
  ModelStop explanation(std::string explanation) && {
    this->set_explanation(std::move(explanation));
    return std::move(*this);
  }
 
  template <typename... Args>
  ModelStop explanation(std::string_view format, Args&&... args) && {
    this->set_explanation(fmt::format(fmt::runtime(format), std::forward<Args>(args)...));
    return std::move(*this);
  }
};
 
class Model : public Entity {
 public:
  using Entity::Entity;
 
  virtual ~Model() noexcept = default;
 
  virtual Duration resolution() const;
 
  virtual bool is_connected() const { return connected_; }
 
  virtual bool is_operational() const { return operational_; }
 
  virtual void connect() { connected_ = true; }
 
  virtual void disconnect() { connected_ = false; }
 
  virtual void enroll(Registrar&) {}
 
  virtual void start(const Sync&) { operational_ = true; }
 
  virtual Duration process(const Sync&) = 0;
 
  virtual void pause(const Sync&) {}
 
  virtual void resume(const Sync&) {}
 
  virtual void stop(const Sync&) { operational_ = false; }
 
  virtual void reset() { throw ModelError("reset not supported by this model"); }
 
  virtual void abort() { throw ModelError("abort not supported by this model"); }
 
 protected:
  bool connected_{false};
  bool operational_{false};
};
 
class ModelFactory : public Entity, public fable::Confable {
 public:
  using Entity::Entity;
  virtual ~ModelFactory() = default;
};
 
}  // namespace cloe