role_pin_round_trip.hpp

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#pragma once
 
#include <optional>
 
#include "porytiles/domain/models/metatile_attribute.hpp"
#include "porytiles/domain/models/porytiles_tileset_component.hpp"
#include "porytiles/utilities/panic/panic.hpp"
 
namespace porytiles {
 
[[nodiscard]] inline MetatileAttribute merge_prior_layer_type_pin(
    MetatileAttribute fresh_from_bin,
    PriorPinColumnState prior_state,
    const std::optional<MetatileAttribute> &prior_attribute)
{
    switch (prior_state) {
    case PriorPinColumnState::no_csv:
    case PriorPinColumnState::column_absent:
        fresh_from_bin.explicit_layer_type(fresh_from_bin.layer_type());
        return fresh_from_bin;
    case PriorPinColumnState::column_present:
        if (prior_attribute.has_value() && prior_attribute->explicit_layer_type().has_value()) {
            fresh_from_bin.explicit_layer_type(fresh_from_bin.layer_type());
        }
        return fresh_from_bin;
    }
    panic("merge_prior_layer_type_pin: unhandled PriorPinColumnState value");
}
 
} // namespace porytiles