cpp-engine/include/engine/condition.h

//
//  condition.hpp
//  pokemon-engine
//
//  Created by Sam Jaffe on 7/6/22.
//  Copyright © 2022 Sam Jaffe. All rights reserved.
//

#pragma once

#include <functional>
#include <string>
#include <vector>

#include <reflection/forward.h>
#include <reflection/property.h>

#include <engine/forwards.h>

namespace engine {

class Condition {
public:
  using Predicate = std::function<bool(engine::Event const &)>;
  enum class Comparator { NOT_EQUAL = 0, EQUAL = 1, LESS = 2, GREATER = 4 };

private:
  std::string event_type_;
  std::vector<Predicate> predicates_;

public:
  Condition() = default;
  Condition(std::string event_type, std::vector<Predicate> predicates);

  std::string_view event_type() const { return event_type_; }
  bool operator()(Event const & on) const;

  template <typename T>
  static Predicate make_predicate(reflection::Property const & scope,
                                  Comparator cmp, T const & value);
};

}