#include "network_set.h"

void NetworkSet::Clear() {
  network_by_item_.clear();
}

void NetworkSet::AddLink(int id1, int id2) {
  if (id2 > id1) {
    // Make sure id1 < id2
    std::swap(id1, id2);
  }

  if (!network_by_item_.count(id1)) {
    network_by_item_[id1] = {};
  }
  if (!network_by_item_.count(id2)) {
    network_by_item_[id2] = {};
  }

  network_by_item_[id1].insert({id1, id2});
  network_by_item_[id2].insert({id1, id2});
}

bool NetworkSet::IsItemInNetwork(int id) const {
  return network_by_item_.count(id);
}

const std::set<std::pair<int, int>>& NetworkSet::GetNetworkGraph(int id) const {
  return network_by_item_.at(id);
}