📚 atdd-subway-map 미션 정리

private ExtractableResponse<Response> addSection(String content) {
  return RestAssured.given().log().all()
    .body(content)
    .contentType(MediaType.APPLICATION_JSON_VALUE)
    .when()
    .post("/lines/{id}/sections", 1L)
    .then().log().all()
    .extract();
}

@Transactional
public void addSection(final Long lineId, final SectionRequest sectionRequest) {
  Line line = lineRepository.findById(lineId);
  Section toAddSection = sectionRequest.toSection(lineId);
  Station targetStation = line.registeredStation(toAddSection);
  if (toAddSection.hasUpStation(targetStation)) {
    Section targetSection = line.findSectionWithUpStation(targetStation);
    checkAddableByDistance(toAddSection, targetSection);
    lineRepository.updateSection(lineId,
                                 new Section(targetSection.id(), lineId, toAddSection.downStation(), targetSection.downStation(), targetSection.subtractDistance(toAddSection)));
  }
  if (toAddSection.hasDownStation(targetStation)) {
    Section targetSection = line.findSectionWithDownStation(targetStation);
    checkAddableByDistance(toAddSection, targetSection);
    lineRepository.updateSection(lineId,
                                 new Section(targetSection.id(), lineId, targetSection.upStation(), toAddSection.upStation(), targetSection.subtractDistance(toAddSection)));
  }
  lineRepository.addSection(lineId, sectionRequest.getUpStationId(), sectionRequest.getDownStationId(), sectionRequest.getDistance());
}

public class LineService {
    private final LineRepository lineRepository;
    private final StationDao stationDao;
    private final List<FindSectionStrategy> findSectionStrategies;
// ...

@Transactional
public void addSection(final Long lineId, final SectionRequest sectionRequest) {
  Line line = lineRepository.findById(lineId);
  Section toAddSection = sectionRequest.toSection(lineId);
  Station targetStation = line.registeredStation(toAddSection);
  Section targetSection = line.findSectionWithStation(targetStation, findSectionStrategies);
  lineRepository.updateSection(lineId, targetSection.updateToAdd(toAddSection));
  lineRepository.addSection(lineId, sectionRequest.getUpStationId(), sectionRequest.getDownStationId(), sectionRequest.getDistance());
}

public Section findSectionWithStation(Station targetStation, List<FindSectionStrategy> findSectionStrategies) {
  return findSectionStrategies.stream()
    .map(findSectionStrategy -> findSectionStrategy.findSection(sections, targetStation))
    .filter(Optional::isPresent)
    .map(Optional::get)
    .findAny()
    .orElse(EMPTY);
}