Status TablePlugin::HandleRequest(const std::shared_ptr<datafacade::BaseDataFacade> facade,
const api::TableParameters ¶ms,
util::json::Object &result) const
{
BOOST_ASSERT(params.IsValid());
if (!CheckAllCoordinates(params.coordinates))
{
return Error("InvalidOptions", "Coordinates are invalid", result);
}
if (params.bearings.size() > 0 && params.coordinates.size() != params.bearings.size())
{
return Error(
"InvalidOptions", "Number of bearings does not match number of coordinates", result);
}
// Empty sources or destinations means the user wants all of them included, respectively
// The ManyToMany routing algorithm we dispatch to below already handles this perfectly.
const auto num_sources =
params.sources.empty() ? params.coordinates.size() : params.sources.size();
const auto num_destinations =
params.destinations.empty() ? params.coordinates.size() : params.destinations.size();
if (max_locations_distance_table > 0 &&
((num_sources * num_destinations) >
static_cast<std::size_t>(max_locations_distance_table * max_locations_distance_table)))
{
return Error("TooBig", "Too many table coordinates", result);
}
auto snapped_phantoms = SnapPhantomNodes(GetPhantomNodes(*facade, params));
auto result_table =
distance_table(*facade, snapped_phantoms, params.sources, params.destinations);
if (result_table.empty())
{
return Error("NoTable", "No table found", result);
}
api::TableAPI table_api{*facade, params};
table_api.MakeResponse(result_table, snapped_phantoms, result);
return Status::Ok;
}
Status ViaRoutePlugin::HandleRequest(const std::shared_ptr<datafacade::BaseDataFacade> facade,
const api::RouteParameters &route_parameters,
util::json::Object &json_result)
{
BOOST_ASSERT(route_parameters.IsValid());
if (max_locations_viaroute > 0 &&
(static_cast<int>(route_parameters.coordinates.size()) > max_locations_viaroute))
{
return Error("TooBig",
"Number of entries " + std::to_string(route_parameters.coordinates.size()) +
" is higher than current maximum (" +
std::to_string(max_locations_viaroute) + ")",
json_result);
}
if (!CheckAllCoordinates(route_parameters.coordinates))
{
return Error("InvalidValue", "Invalid coordinate value.", json_result);
}
auto phantom_node_pairs = GetPhantomNodes(*facade, route_parameters);
if (phantom_node_pairs.size() != route_parameters.coordinates.size())
{
return Error("NoSegment",
std::string("Could not find a matching segment for coordinate ") +
std::to_string(phantom_node_pairs.size()),
json_result);
}
BOOST_ASSERT(phantom_node_pairs.size() == route_parameters.coordinates.size());
auto snapped_phantoms = SnapPhantomNodes(phantom_node_pairs);
const bool continue_straight_at_waypoint = route_parameters.continue_straight
? *route_parameters.continue_straight
: facade->GetContinueStraightDefault();
InternalRouteResult raw_route;
auto build_phantom_pairs = [&raw_route, continue_straight_at_waypoint](
const PhantomNode &first_node, const PhantomNode &second_node) {
raw_route.segment_end_coordinates.push_back(PhantomNodes{first_node, second_node});
auto &last_inserted = raw_route.segment_end_coordinates.back();
// enable forward direction if possible
if (last_inserted.source_phantom.forward_segment_id.id != SPECIAL_SEGMENTID)
{
last_inserted.source_phantom.forward_segment_id.enabled |=
!continue_straight_at_waypoint;
}
// enable reverse direction if possible
if (last_inserted.source_phantom.reverse_segment_id.id != SPECIAL_SEGMENTID)
{
last_inserted.source_phantom.reverse_segment_id.enabled |=
!continue_straight_at_waypoint;
}
};
util::for_each_pair(snapped_phantoms, build_phantom_pairs);
if (1 == raw_route.segment_end_coordinates.size())
{
if (route_parameters.alternatives && facade->GetCoreSize() == 0)
{
alternative_path(*facade, raw_route.segment_end_coordinates.front(), raw_route);
}
else
{
direct_shortest_path(*facade, raw_route.segment_end_coordinates, raw_route);
}
}
else
{
shortest_path(*facade,
raw_route.segment_end_coordinates,
route_parameters.continue_straight,
raw_route);
}
// we can only know this after the fact, different SCC ids still
// allow for connection in one direction.
if (raw_route.is_valid())
{
api::RouteAPI route_api{*facade, route_parameters};
route_api.MakeResponse(raw_route, json_result);
}
else
{
auto first_component_id = snapped_phantoms.front().component.id;
auto not_in_same_component = std::any_of(snapped_phantoms.begin(),
snapped_phantoms.end(),
[first_component_id](const PhantomNode &node) {
return node.component.id != first_component_id;
});
if (not_in_same_component)
{
return Error("NoRoute", "Impossible route between points", json_result);
}
else
{
return Error("NoRoute", "No route found between points", json_result);
}
}
return Status::Ok;
}
Status TripPlugin::HandleRequest(const datafacade::ContiguousInternalMemoryDataFacadeBase &facade,
const RoutingAlgorithmsInterface &algorithms,
const api::TripParameters ¶meters,
util::json::Object &json_result) const
{
if (!algorithms.HasShortestPathSearch())
{
return Error("NotImplemented",
"Shortest path search is not implemented for the chosen search algorithm.",
json_result);
}
if (!algorithms.HasManyToManySearch())
{
return Error("NotImplemented",
"Many to many search is not implemented for the chosen search algorithm.",
json_result);
}
BOOST_ASSERT(parameters.IsValid());
const auto number_of_locations = parameters.coordinates.size();
std::size_t source_id = INVALID_INDEX;
std::size_t destination_id = INVALID_INDEX;
if (parameters.source == api::TripParameters::SourceType::First)
{
source_id = 0;
}
if (parameters.destination == api::TripParameters::DestinationType::Last)
{
BOOST_ASSERT(number_of_locations > 0);
destination_id = number_of_locations - 1;
}
bool fixed_start = (source_id == 0);
bool fixed_end = (destination_id == number_of_locations - 1);
if (!IsSupportedParameterCombination(fixed_start, fixed_end, parameters.roundtrip))
{
return Error("NotImplemented", "This request is not supported", json_result);
}
// enforce maximum number of locations for performance reasons
if (max_locations_trip > 0 && static_cast<int>(number_of_locations) > max_locations_trip)
{
return Error("TooBig", "Too many trip coordinates", json_result);
}
if (!CheckAllCoordinates(parameters.coordinates))
{
return Error("InvalidValue", "Invalid coordinate value.", json_result);
}
auto phantom_node_pairs = GetPhantomNodes(facade, parameters);
if (phantom_node_pairs.size() != number_of_locations)
{
return Error("NoSegment",
std::string("Could not find a matching segment for coordinate ") +
std::to_string(phantom_node_pairs.size()),
json_result);
}
BOOST_ASSERT(phantom_node_pairs.size() == number_of_locations);
if (fixed_start && fixed_end && (source_id >= parameters.coordinates.size() ||
destination_id >= parameters.coordinates.size()))
{
return Error("InvalidValue", "Invalid source or destination value.", json_result);
}
auto snapped_phantoms = SnapPhantomNodes(phantom_node_pairs);
BOOST_ASSERT(snapped_phantoms.size() == number_of_locations);
// compute the duration table of all phantom nodes
auto result_table = util::DistTableWrapper<EdgeWeight>(
algorithms.ManyToManySearch(snapped_phantoms, {}, {}), number_of_locations);
if (result_table.size() == 0)
{
return Status::Error;
}
const constexpr std::size_t BF_MAX_FEASABLE = 10;
BOOST_ASSERT_MSG(result_table.size() == number_of_locations * number_of_locations,
"Distance Table has wrong size");
if (!IsStronglyConnectedComponent(result_table))
{
return Error("NoTrips", "No trip visiting all destinations possible.", json_result);
}
if (fixed_start && fixed_end)
{
ManipulateTableForFSE(source_id, destination_id, result_table);
}
std::vector<NodeID> trip;
trip.reserve(number_of_locations);
// get an optimized order in which the destinations should be visited
if (number_of_locations < BF_MAX_FEASABLE)
{
trip = trip::BruteForceTrip(number_of_locations, result_table);
}
else
{
trip = trip::FarthestInsertionTrip(number_of_locations, result_table);
}
// rotate result such that roundtrip starts at node with index 0
// thist first if covers scenarios: !fixed_end || fixed_start || (fixed_start && fixed_end)
if (!fixed_end || fixed_start)
{
auto desired_start_index = std::find(std::begin(trip), std::end(trip), 0);
BOOST_ASSERT(desired_start_index != std::end(trip));
std::rotate(std::begin(trip), desired_start_index, std::end(trip));
}
else if (fixed_end && !fixed_start && parameters.roundtrip)
{
auto desired_start_index = std::find(std::begin(trip), std::end(trip), destination_id);
BOOST_ASSERT(desired_start_index != std::end(trip));
std::rotate(std::begin(trip), desired_start_index, std::end(trip));
}
// get the route when visiting all destinations in optimized order
InternalRouteResult route =
ComputeRoute(algorithms, snapped_phantoms, trip, parameters.roundtrip);
// get api response
const std::vector<std::vector<NodeID>> trips = {trip};
const std::vector<InternalRouteResult> routes = {route};
api::TripAPI trip_api{facade, parameters};
trip_api.MakeResponse(trips, routes, snapped_phantoms, json_result);
return Status::Ok;
}
Status TripPlugin::HandleRequest(const api::TripParameters ¶meters,
util::json::Object &json_result)
{
BOOST_ASSERT(parameters.IsValid());
// enforce maximum number of locations for performance reasons
if (max_locations_trip > 0 &&
static_cast<int>(parameters.coordinates.size()) > max_locations_trip)
{
return Error("TooBig", "Too many trip coordinates", json_result);
}
if (!CheckAllCoordinates(parameters.coordinates))
{
return Error("InvalidValue", "Invalid coordinate value.", json_result);
}
auto phantom_node_pairs = GetPhantomNodes(parameters);
if (phantom_node_pairs.size() != parameters.coordinates.size())
{
return Error("NoSegment",
std::string("Could not find a matching segment for coordinate ") +
std::to_string(phantom_node_pairs.size()),
json_result);
}
BOOST_ASSERT(phantom_node_pairs.size() == parameters.coordinates.size());
auto snapped_phantoms = SnapPhantomNodes(phantom_node_pairs);
const auto number_of_locations = snapped_phantoms.size();
// compute the duration table of all phantom nodes
const auto result_table = util::DistTableWrapper<EdgeWeight>(
duration_table(snapped_phantoms, {}, {}), number_of_locations);
if (result_table.size() == 0)
{
return Status::Error;
}
const constexpr std::size_t BF_MAX_FEASABLE = 10;
BOOST_ASSERT_MSG(result_table.size() == number_of_locations * number_of_locations,
"Distance Table has wrong size");
// get scc components
SCC_Component scc = SplitUnaccessibleLocations(number_of_locations, result_table);
std::vector<std::vector<NodeID>> trips;
trips.reserve(scc.GetNumberOfComponents());
// run Trip computation for every SCC
for (std::size_t k = 0; k < scc.GetNumberOfComponents(); ++k)
{
const auto component_size = scc.range[k + 1] - scc.range[k];
BOOST_ASSERT_MSG(component_size > 0, "invalid component size");
std::vector<NodeID> scc_route;
auto route_begin = std::begin(scc.component) + scc.range[k];
auto route_end = std::begin(scc.component) + scc.range[k + 1];
if (component_size > 1)
{
if (component_size < BF_MAX_FEASABLE)
{
scc_route =
trip::BruteForceTrip(route_begin, route_end, number_of_locations, result_table);
}
else
{
scc_route = trip::FarthestInsertionTrip(route_begin, route_end, number_of_locations,
result_table);
}
}
else
{
scc_route = std::vector<NodeID>(route_begin, route_end);
}
trips.push_back(std::move(scc_route));
}
if (trips.empty())
{
return Error("NoTrips", "Cannot find trips", json_result);
}
// compute all round trip routes
std::vector<InternalRouteResult> routes;
routes.reserve(trips.size());
for (const auto &trip : trips)
{
routes.push_back(ComputeRoute(snapped_phantoms, parameters, trip));
}
api::TripAPI trip_api{BasePlugin::facade, parameters};
trip_api.MakeResponse(trips, routes, snapped_phantoms, json_result);
return Status::Ok;
}
