PcgTerrainWatcher.h

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#pragma once
 
#include "common/Result.h"
 
#include <string>
#include <vector>
 
namespace eve::procgen {
 
enum class PcgTerrainChangeType { Created = 0, Removed = 1 };
 
struct PcgTerrainChange {
    std::string terrainId;
    PcgTerrainChangeType type = PcgTerrainChangeType::Created;
};
 
class EVENGINE_API_DOMAINS PcgTerrainWatcher {
public:
    void beginScan();
    [[nodiscard]] Result<int> addTerrain(const std::string& terrainId);
    [[nodiscard]] Result<int> commitScan();
    void cancelScan();
    int getTerrainCount() const noexcept;
    int getChangeCount() const noexcept;
    [[nodiscard]] Result<std::string> getChangeTerrainId(int index) const;
    [[nodiscard]] Result<int> getChangeType(int index) const;
 
private:
    bool initialized_ = false;
    bool scanning_ = false;
    std::vector<std::string> terrains_;
    std::vector<std::string> candidate_;
    std::vector<PcgTerrainChange> changes_;
};
 
}  // namespace eve::procgen