IDReduceFunction.hpp

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#pragma once
#include <fishnet/MultiPolygon.hpp>
#include <fishnet/Polygon.hpp>
#include "SettlementShape.hpp"
#include <fishnet/Task.hpp>
#include <fishnet/OGRFieldAdapter.hpp>
 
struct IDReduceFunction{
    FileReference outputFileRef;
    
    IDReduceFunction(FileReference outputFileRef):outputFileRef(std::move(outputFileRef)){}
 
    IDReduceFunction()=default;
 
    template<fishnet::geometry::IPolygon P>
    SettlementShape<fishnet::geometry::MultiPolygon<P>> operator()( const std::vector<SettlementShape<P>> & settlementPolygons) const noexcept {
        size_t id = std::ranges::fold_left(settlementPolygons,0,[](size_t current, const auto & settlementPolygon){return current + settlementPolygon.key();}); 
        id = fishnet::normalizeToShpFileIntField(id);
        fishnet::geometry::MultiPolygon<P> resultGeometry {settlementPolygons | std::views::transform([](const auto & settPoly){return static_cast<P>(settPoly);}),true};
        return SettlementShape<fishnet::geometry::MultiPolygon<P>>(id,outputFileRef,resultGeometry);
    }
};