feat(train): routes planned through the instance's BRouter (ADR 0030, D44)
The routing endpoint plans a route through the waypoints for one of six profiles, for the people signed in, at most 50 waypoints and 30 plans a person a minute, nothing kept or logged; refused without BROUTER_URL. BRouter's GeoJSON is read into points, elevations, climb and descent above 3 m, turn hints and stretches by surface. Train's running profile for BRouter, halkyon-run.brf, is a first guess not yet tried on BRouter. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
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import 'package:halkyon_train_server/src/generated/protocol.dart';
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import 'package:halkyon_train_server/src/routing/brouter.dart';
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import 'package:test/test.dart';
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/// A route as BRouter's GeoJSON gives it (written from its `FormatJson` and
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/// `Formatter`, read 28 Oct 2026): numbers in the properties as strings,
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/// coordinates `[lon, lat, elevation]`, turn hints `[index, command, exit,
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/// metres, angle]`, and its messages a table whose first row names the
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/// columns.
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Map<String, Object?> brouterRoute({
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List<List<num>>? coordinates,
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List<Object?>? voicehints,
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}) => {
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'type': 'FeatureCollection',
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'features': [
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{
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'type': 'Feature',
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'properties': {
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'creator': 'BRouter-1.7.8',
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'name': 'brouter_trekking_0',
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'track-length': '1234',
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'filtered ascend': '9',
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'plain-ascend': '12',
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'total-time': '300',
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'voicehints':
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voicehints ??
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[
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[1, 2, 0, 400, -90],
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[2, 13, 2, 200, 45],
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],
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'messages': [
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[
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'Longitude',
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'Latitude',
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'Elevation',
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'Distance',
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'CostPerKm',
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'ElevCost',
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'TurnCost',
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'NodeCost',
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'InitialCost',
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'WayTags',
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'NodeTags',
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'Time',
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'Energy',
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],
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[
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'13404954',
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'52520008',
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'34',
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'300',
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'1000',
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'0',
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'0',
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'0',
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'0',
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'highway=residential surface=asphalt',
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'',
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'60',
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'0',
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],
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[
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'13405954',
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'52521008',
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'40',
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'200',
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'1000',
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'0',
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'0',
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'0',
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'0',
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'highway=residential surface=asphalt',
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'',
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'100',
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'0',
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],
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[
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'13406954',
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'52522008',
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'38',
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'734',
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'1300',
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'0',
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'0',
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'0',
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'0',
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'highway=track tracktype=grade2 surface=gravel',
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'',
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'300',
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'0',
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],
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],
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},
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'geometry': {
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'type': 'LineString',
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'coordinates':
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coordinates ??
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[
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[13.404954, 52.520008, 34.0],
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[13.405954, 52.521008, 40.25],
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[13.406954, 52.522008, 38.0],
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[13.407954, 52.523008, 30.5],
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],
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},
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},
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],
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};
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void main() {
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test('a route reads with its points, elevations, length, hints and '
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'stretches, those of one way joined', () {
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final route = plannedRouteOf(brouterRoute());
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expect(
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(route.points.first.lat, route.points.first.lon),
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(52.520008, 13.404954),
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);
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expect(route.points, hasLength(4));
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expect(route.elevations, [34.0, 40.25, 38.0, 30.5]);
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expect(route.distanceMetres, 1234);
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expect(route.hints.map((h) => (h.index, h.command, h.exit)), [
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(1, 2, 0),
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(2, 13, 2),
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]);
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expect(route.hints.first.metres, 400);
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expect(route.hints.first.angle, -90);
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expect(
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route.stretches.map((s) => (s.metres, s.surface, s.highway)),
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[(500, 'asphalt', 'residential'), (734, 'gravel', 'track')],
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);
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});
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test("its climb and descent count only what passes 3 m, as a workout's", () {
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final route = plannedRouteOf(brouterRoute());
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// Up 6.25 from 34; down to 38 is within 3 m of 40.25, to 30.5 is not.
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expect(route.ascentMetres, 6);
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expect(route.descentMetres, 10);
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});
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test('without elevations it has none, nor a climb', () {
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final route = plannedRouteOf(
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brouterRoute(
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coordinates: [
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[13.40, 52.52],
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[13.41, 52.53],
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],
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),
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);
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expect(route.elevations, isEmpty);
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expect((route.ascentMetres, route.descentMetres), (0, 0));
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});
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test('a hint it cannot read, or one off the route, is left out', () {
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final route = plannedRouteOf(
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brouterRoute(
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voicehints: [
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[1, 5, 0, 100, 90],
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[9, 2, 0, 100, -90],
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['x'],
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],
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),
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);
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expect(route.hints.map((h) => h.command), [5]);
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});
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test('an answer without a route is a failure', () {
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expect(
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() => plannedRouteOf({'type': 'FeatureCollection', 'features': []}),
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throwsA(isA<BRouterFailed>()),
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);
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});
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test("Train's profiles are BRouter's, running Train's own", () {
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expect(
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{for (final profile in RouteProfile.values) brouterProfileOf(profile)},
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{
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'halkyon-run',
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'hiking-mountain',
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'fastbike',
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'trekking',
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'gravel',
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'mtb',
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},
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);
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});
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}
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