Method HandleRequest

src/engine/plugins/match.cpp:103–317

}

Status MatchPlugin::HandleRequest(const RoutingAlgorithmsInterface &algorithms,
                                  const api::MatchParameters &parameters,
                                  osrm::engine::api::ResultT &result) const
{
    if (!algorithms.HasMapMatching())
    {
        return Error("NotImplemented",
                     "Map matching is not implemented for the chosen search algorithm.",
                     result);
    }

    if (!CheckAlgorithms(parameters, algorithms, result))
        return Status::Error;

    const auto &facade = algorithms.GetFacade();

    BOOST_ASSERT(parameters.IsValid());

    // enforce maximum number of locations for performance reasons
    if (max_locations_map_matching > 0 &&
        static_cast<int>(parameters.coordinates.size()) > max_locations_map_matching)
    {
        return Error("TooBig", "Too many trace coordinates", result);
    }

    if (!CheckAllCoordinates(parameters.coordinates))
    {
        return Error("InvalidValue", "Invalid coordinate value.", result);
    }

    if (max_radius_map_matching > 0 && std::any_of(parameters.radiuses.begin(),
                                                   parameters.radiuses.end(),
                                                   [&](const auto &radius)
                                                   {
                                                       if (!radius)
                                                           return false;
                                                       return *radius > max_radius_map_matching;
                                                   }))
    {
        return Error("TooBig", "Radius search size is too large for map matching.", result);
    }

    // Check for same or increasing timestamps. Impl. note: Incontrast to `sort(first,
    // last, less_equal)` checking `greater` in reverse meets irreflexive requirements.
    const auto time_increases_monotonically = std::is_sorted(
        parameters.timestamps.rbegin(), parameters.timestamps.rend(), std::greater<>{});

    if (!time_increases_monotonically)
    {
        return Error("InvalidValue", "Timestamps need to be monotonically increasing.", result);
    }

    SubMatchingList sub_matchings;
    api::tidy::Result tidied;
    if (parameters.tidy)
    {
        // Transparently tidy match parameters, do map matching on tidied parameters.
        // Then use the mapping to restore the original <-> tidied relationship.