NeighborAcquirer.h

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#pragma once
#include <vector>
#include <array>
#include "CommunicationPartner.h"
 
class Domain;
class HaloRegion;
 
class NeighborAcquirer {
public:
    static std::tuple<std::vector<CommunicationPartner>, std::vector<CommunicationPartner>> acquireNeighbors(
        const std::array<double, 3>& globalDomainLength, HaloRegion* ownRegion, std::vector<HaloRegion>& desiredRegions,
        const MPI_Comm& comm, bool excludeOwnRank=true);
 
    static std::vector<CommunicationPartner> squeezePartners(const std::vector<CommunicationPartner>& partners);
 
private:
    static bool isIncluded(HaloRegion* myRegion, HaloRegion* inQuestion);
 
    static HaloRegion overlap(const HaloRegion& myRegion, const HaloRegion& inQuestion);
 
    static std::pair<std::vector<HaloRegion>, std::vector<std::array<double, 3>>> getPotentiallyShiftedRegions(
                             const std::array<double, 3>& domainLength, const HaloRegion& region);
 
    friend class NeighborAcquirerTest;
};