[gnome-maps/wip/mlundblad/transit-plugin-resrobot: 5/5] WIP: add transit plugin for Resrobot
- From: Marcus Lundblad <mlundblad src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-maps/wip/mlundblad/transit-plugin-resrobot: 5/5] WIP: add transit plugin for Resrobot
- Date: Wed, 16 Oct 2019 17:27:10 +0000 (UTC)
commit f43e506664de486cffa3d52ca5be6239daf411f4
Author: Marcus Lundblad <ml update uu se>
Date: Thu Oct 3 23:01:18 2019 +0200
WIP: add transit plugin for Resrobot
src/org.gnome.Maps.src.gresource.xml | 1 +
src/transitplugins/resrobot.js | 601 +++++++++++++++++++++++++++++++++++
2 files changed, 602 insertions(+)
---
diff --git a/src/org.gnome.Maps.src.gresource.xml b/src/org.gnome.Maps.src.gresource.xml
index 5ec3d065..322722bf 100644
--- a/src/org.gnome.Maps.src.gresource.xml
+++ b/src/org.gnome.Maps.src.gresource.xml
@@ -113,5 +113,6 @@
<file alias="geojsonvt/transform.js">transform.js</file>
<file alias="geojsonvt/wrap.js">wrap.js</file>
<file>transitplugins/openTripPlanner.js</file>
+ <file>transitplugins/resrobot.js</file>
</gresource>
</gresources>
diff --git a/src/transitplugins/resrobot.js b/src/transitplugins/resrobot.js
new file mode 100644
index 00000000..e733b644
--- /dev/null
+++ b/src/transitplugins/resrobot.js
@@ -0,0 +1,601 @@
+/* -*- Mode: JS2; indent-tabs-mode: nil; js2-basic-offset: 4 -*- */
+/* vim: set et ts=4 sw=4: */
+/*
+ * Copyright (c) 2019 Marcus Lundblad
+ *
+ * GNOME Maps is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * GNOME Maps is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with GNOME Maps; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Marcus Lundblad <ml update uu se>
+ */
+
+/**
+ * This module implements a transit routing plugin for the Swedish national
+ * Resrobot transit journey planning API.
+ *
+ * API docs for Resrobot can be found at:
+ * https://www.trafiklab.se/api/resrobot-reseplanerare/dokumentation/sokresa
+ */
+
+const Champlain = imports.gi.Champlain;
+const GLib = imports.gi.GLib;
+const Soup = imports.gi.Soup;
+
+const Application = imports.application;
+const GraphHopperTransit = imports.graphHopperTransit;
+const HTTP = imports.http;
+const HVT = imports.hvt;
+const TransitPlan = imports.transitPlan;
+const Utils = imports.utils;
+
+const BASE_URL = 'https://api.resrobot.se';
+const API_VERSION = 'v2';
+
+// Timezone for timestamps returned by this provider
+const NATIVE_TIMEZONE = 'Europe/Stockholm';
+
+const ISO_8601_DURATION_REGEXP = new RegExp(/PT((\d+)H)?((\d+)M)?/);
+
+const Products = {
+ EXPRESS_TRAIN: 2,
+ REGIONAL_TRAIN: 4,
+ EXPRESS_BUS: 8,
+ LOCAL_TRAIN: 16,
+ SUBWAY: 32,
+ TRAM: 64,
+ BUS: 128,
+ FERRY: 256,
+ // This is not currently specified in the API documentation
+ TAXI: 512
+};
+
+const LegType = {
+ WALK: 'WALK',
+ TRANSIT: 'JNY',
+ TRANSFER: 'TRSF'
+};
+
+const CatCode = {
+ EXPRESS_TRAIN: 1,
+ REGIONAL_TRAIN: 2,
+ EXPRESS_BUS: 3,
+ LOCAL_TRAIN: 4,
+ SUBWAY: 5,
+ TRAM: 6,
+ BUS: 7,
+ FERRY: 8,
+ // This is not currently specified in the API documentation
+ TAXI: 9
+};
+
+const MAX_NUM_NEARBY_STOPS = 5;
+const NEARBY_STOPS_SEARCH_RADIUS = 500;
+
+// ignore walking legs at the beginning/end when below this distance
+const DISTANCE_THREASHOLD_TO_IGNORE = 50;
+
+// search radius to search for walk-only journeys
+const WALK_SEARCH_RADIUS = 2000;
+
+// maximum distance for walk-only journey
+const MAX_WALK_ONLY_DISTANCE = 2500;
+
+var Resrobot = class Resrobot {
+ constructor(params) {
+ this._session = new Soup.Session({ user_agent : 'gnome-maps/' + pkg.version });
+ this._plan = Application.routingDelegator.transitRouter.plan;
+ this._query = Application.routeQuery;
+ this._key = params.key;
+ this._tz = GLib.TimeZone.new(NATIVE_TIMEZONE);
+
+ if (!this._key)
+ throw new Error('missing key');
+ }
+
+ fetchFirstResults() {
+ let filledPoints = this._query.filledPoints;
+
+ this._extendPrevious = false;
+ this._viaId = null;
+
+ if (filledPoints.length > 3) {
+ Utils.debug('This plugin only support max 3 points');
+ this._plan.reset();
+ this._plan.requestFailed();
+ this._query.reset();
+ } else if (filledPoints.length === 2) {
+ this._fetchResults();
+ } else {
+ let lat = filledPoints[1].place.location.latitude;
+ let lon = filledPoints[1].place.location.longitude;
+
+ this._fetchNearbyStops(lat, lon, MAX_NUM_NEARBY_STOPS,
+ NEARBY_STOPS_SEARCH_RADIUS,
+ () => this._fetchResults());
+ }
+ }
+
+ fetchMoreResults() {
+ this._extendPrevious = true;
+ this._fetchResults();
+ }
+
+ _fetchNearbyStops(lat, lon, num, radius, callback) {
+ let query = new HTTP.Query(this._getNearbyStopsQueryParams(lat, lon,
+ num, radius));
+ let uri = new Soup.URI(BASE_URL + '/' + API_VERSION +
+ '/location.nearbystops?' + query.toString());
+ let request = new Soup.Message({ method: 'GET', uri: uri });
+
+ this._session.queue_message(request, (obj, message) => {
+ if (message.status_code !== Soup.Status.OK) {
+ Utils.debug('Failed to get nearby stops: ' + message.status_code);
+ this._noRouteFound();
+ } else {
+ try {
+ let result = JSON.parse(message.response_body.data);
+ let stopLocations = result.StopLocation;
+
+ Utils.debug('nearby stops: ' + JSON.stringify(result, null, 2));
+
+ if (stopLocations && stopLocations.length > 0) {
+ let stopLocation = stopLocations[0];
+
+ this._viaId = stopLocation.id;
+ callback();
+ } else {
+ Utils.debug('No nearby stops found');
+ this._noRouteFound();
+ }
+ } catch (e) {
+ Utils.debug('Error parsing result: ' + e);
+ this._plan.reset();
+ this._plan.requestFailed();
+ }
+ }
+ });
+ }
+
+ _fetchResults() {
+ let query = new HTTP.Query(this._getQueryParams());
+ let uri = new Soup.URI(BASE_URL + '/' + API_VERSION + '/trip?' +
+ query.toString());
+ let request = new Soup.Message({ method: 'GET', uri: uri });
+
+ this._session.queue_message(request, (obj, message) => {
+ if (message.status_code !== Soup.Status.OK) {
+ Utils.debug('Failed to get trip: ' + message.status_code);
+ this._noRouteFound();
+ } else {
+ try {
+ let result = JSON.parse(message.response_body.data);
+
+ Utils.debug('result: ' + JSON.stringify(result, null, 2));
+ if (result.Trip) {
+ let itineraries = this._createItineraries(result.Trip);
+
+ // store the back and forward references from the result
+ this._scrB = result.scrB;
+ this._scrF = result.scrF;
+ this._processItineraries(itineraries);
+ } else {
+ this._noRouteFound();
+ }
+ } catch (e) {
+ Utils.debug('Error parsing result: ' + e);
+ this._plan.reset();
+ this._plan.requestFailed();
+ }
+ }
+ });
+ }
+
+ _processItineraries(itineraries) {
+ /* if this is the first request, and the distance is short enough,
+ * add an additional walking-only itinerary at the beginning
+ */
+ let start = this._query.filledPoints[0];
+ let end = this._query.filledPoints.last();
+ let startLoc = start.place.location;
+ let endLoc = end.place.location;
+ let distance = endLoc.get_distance_from(startLoc) * 1000;
+
+ if (!this._extendPrevious && distance <= WALK_SEARCH_RADIUS) {
+ GraphHopperTransit.fetchWalkingRoute([start, end], (route) => {
+ if (route && route.distance <= MAX_WALK_ONLY_DISTANCE) {
+ let walkingItinerary =
+ this._createWalkingOnlyItinerary(start, end, route);
+
+ itineraries.unshift(walkingItinerary);
+ }
+ GraphHopperTransit.addWalkingToItineraries(itineraries,
+ () => this._plan.updateWithNewItineraries(itineraries,
+ this._query.arriveBy,
+ this._extendPrevious));
+ });
+ } else {
+ GraphHopperTransit.addWalkingToItineraries(itineraries,
+ () => this._plan.updateWithNewItineraries(itineraries,
+ this._query.arriveBy,
+ this._extendPrevious));
+ }
+ }
+
+ _createWalkingOnlyItinerary(start, end, route) {
+ let walkingLeg = GraphHopperTransit.createWalkingLeg(start, end,
+ start.place.name,
+ end.place.name,
+ route);
+ let duration = route.duration;
+ /* if the query has no date, just use a fake, since only the time
+ * is relevant for displaying in this case
+ */
+ let date = this._query.date || '2019-01-01';
+ let time = this._query.time + ':00';
+
+ let [timestamp, tzOffset] =
+ this._query.time ? this._parseTime(time, date) :
+ this._getTimestampAndTzOffsetNow();
+
+ if (this._query.arriveBy) {
+ walkingLeg.arrival = timestamp;
+ walkingLeg.departure = timestamp - route.time;
+ } else {
+ walkingLeg.departure = timestamp;
+ walkingLeg.arrival = timestamp + route.time;
+ }
+
+ walkingLeg.agencyTimezoneOffset = tzOffset;
+
+ let walkingItinerary =
+ new TransitPlan.Itinerary({ legs: [walkingLeg]} );
+
+ walkingItinerary.adjustTimings();
+
+ return walkingItinerary;
+ }
+
+ _reset() {
+ if (this._query.latest)
+ this._query.latest.place = null;
+ else
+ this._plan.reset();
+ }
+
+ /* Indicate that no routes where found, either shows the "No route found"
+ * message, or in case of loading additional (later/earlier) results,
+ * indicate no such where found, so that the sidebar can disable the
+ * "load more" functionallity as appropriate.
+ */
+ _noRouteFound() {
+ if (this._extendPrevious) {
+ this._plan.noMoreResults();
+ } else {
+ this._reset();
+ this._plan.noRouteFound();
+ }
+ }
+
+ _createItineraries(trips) {
+ return trips.map((trip) => this._createItinerary(trip));
+ }
+
+ _createItinerary(trip) {
+ let legs = this._createLegs(trip.LegList.Leg);
+ let duration = this._parseDuration(trip.duration);
+ let origin = trip.LegList.Leg[0].Origin;
+ let destination = trip.LegList.Leg.last().Destination;
+ let [startTime,] = this._parseTime(origin.time, origin.date);
+ let [endTime,] = this._parseTime(destination.time, destination.date);
+
+ return new TransitPlan.Itinerary({ duration: duration,
+ departure: startTime,
+ arrival: endTime,
+ legs: legs,
+ duration: duration });
+ }
+
+ /**
+ * Parse a time and date string into a timestamp into an array with
+ * an absolute timestamp in ms since Unix epoch and a timezone offset
+ * for the provider's native timezone at the given time and date
+ */
+ _parseTime(time, date) {
+ let timeText = '%sT%s'.format(date, time);
+ let dateTime = GLib.DateTime.new_from_iso8601(timeText, this._tz);
+
+ return [dateTime.to_unix() * 1000, dateTime.get_utc_offset() / 1000];
+ }
+
+ /**
+ * Get absolute timestamp for "now" in ms and timezone offset in the
+ * native timezone of the provider's native timezone @ "now"
+ */
+ _getTimestampAndTzOffsetNow() {
+ let dateTime = GLib.DateTime.new_now(this._tz);
+
+ return [dateTime.to_unix() * 1000, dateTime.get_utc_offset() / 1000];
+ }
+
+ /**
+ * Parse a subset of ISO 8601 duration expressions.
+ * Handle hour and minute parts
+ */
+ _parseDuration(duration) {
+ let match = duration.match(ISO_8601_DURATION_REGEXP);
+
+ if (match) {
+ let [,,h,,min] = match;
+
+ return (h || 0) * 3600 + (min || 0) * 60;
+ } else {
+ Utils.debug('Unknown duration: ' + duration);
+
+ return -1;
+ }
+ }
+
+ _createLegs(legs) {
+ let result = legs.map((leg, index, legs) => this._createLeg(leg, index, legs));
+
+ if (this._canLegBeIgnored(result[0]))
+ result.shift();
+
+ if (this._canLegBeIgnored(result.last()))
+ result.splice(-1);
+
+ return result;
+ }
+
+ /* determines if a leg can ignored at the start or end, to catch the
+ * case when the user probably meant to search for a trip from a transit
+ * stop anyway
+ */
+ _canLegBeIgnored(leg) {
+ if (!leg.isTransit) {
+ /* check that the distance is below the threashold and also that
+ * the duration is below 1 min, since the API in some occasions
+ * apparently gives distance 0, even though a walking leg has
+ * longer duration, and spans a distance in coordinates.
+ */
+ return leg.distance <= DISTANCE_THREASHOLD_TO_IGNORE &&
+ leg.duration <= 60;
+ } else {
+ return false;
+ }
+ }
+
+ _createLeg(leg, index, legs) {
+ let isTransit;
+
+ if (leg.type === LegType.TRANSIT)
+ isTransit = true;
+ else if (leg.type === LegType.WALK || leg.type === LegType.TRANSFER)
+ isTransit = false;
+ else
+ throw new Error('Unknown leg type: ' + leg.type);
+
+ let origin = leg.Origin;
+ let destination = leg.Destination;
+ let product = leg.Product;
+
+ if (!origin)
+ throw new Error('Missing Origin element');
+ if (!destination)
+ throw new Error('Missing Destination element');
+ if (!product && isTransit)
+ throw new Error('Missing Product element for transit leg');
+
+ let first = index === 0;
+ let last = index === legs.length - 1;
+ /* for walking legs in the beginning or end, use the name from the
+ * query, so we get the names of the place the user searched for in
+ * the results, when starting/ending at a transitstop, use the stop
+ * name
+ */
+ let from =
+ first && !isTransit ? this._query.filledPoints[0].place.name :
+ origin.name;
+ let to =
+ last && !isTransit ? this._query.filledPoints.last().place.name :
+ destination.name;
+ let [departure, tzOffset] = this._parseTime(origin.time, origin.date);
+ let [arrival,] = this._parseTime(destination.time, destination.date);
+ let route = isTransit ? product.num : null;
+ let routeType =
+ isTransit ? this._getHVTCodeFromCatCode(product.catCode) : null;
+ let agencyName = isTransit ? product.operator : null;
+ let agencyUrl = isTransit ? product.operatorUrl : null;
+ let polyline = this._createPolylineForLeg(leg);
+ let duration = leg.duration ? this._parseDuration(leg.duration) : null;
+
+ let result = new TransitPlan.Leg({ departure: departure,
+ arrival: arrival,
+ from: from,
+ to: to,
+ headsign: leg.direction,
+ fromCoordinate: [origin.lat,
+ origin.lon],
+ toCoordinate: [destination.lat,
+ destination.lon],
+ route: route,
+ routeType: routeType,
+ polyline: polyline,
+ isTransit: isTransit,
+ distance: leg.dist,
+ duration: duration,
+ agencyName: agencyName,
+ agencyUrl: agencyUrl,
+ agencyTimezoneOffset: tzOffset,
+ tripShortName: route });
+
+ if (isTransit)
+ result.intermediateStops = this._createIntermediateStops(leg);
+
+ return result;
+ }
+
+ _createPolylineForLeg(leg) {
+ let polyline;
+
+ if (leg.Stops && leg.Stops.Stop) {
+ polyline = [];
+
+ leg.Stops.Stop.forEach((stop) => {
+ polyline.push(new Champlain.Coordinate({ latitude: stop.lat,
+ longitude: stop.lon }));
+ });
+ } else {
+ polyline =
+ [new Champlain.Coordinate({ latitude: leg.Origin.lat,
+ longitude: leg.Origin.lon }),
+ new Champlain.Coordinate({ latitude: leg.Destination.lat,
+ longitude: leg.Destination.lon })];
+ }
+
+ return polyline;
+ }
+
+ _createIntermediateStops(leg) {
+ let result = [];
+
+ if (!leg.Stops && !leg.Stops.Stop)
+ throw new Error('Missing Stops element');
+
+ leg.Stops.Stop.forEach((stop, index) => {
+ if (index !== 0)
+ result.push(this._createIntermediateStop(stop));
+ });
+
+ return result;
+ }
+
+ _createIntermediateStop(stop) {
+ let [departure, departureTzOffset] = [,];
+ let [arrival, arrivalTzOffset] = [,];
+
+ if (stop.depTime && stop.depDate)
+ [departure, departureTzOffset] = this._parseTime(stop.depTime, stop.depDate)
+ if (stop.arrTime && stop.arrDate)
+ [arrival, arrivalTzOffset] = this._parseTime(stop.arrTime, stop.arrDate);
+
+ if (!arrival)
+ arrival = departure;
+ if (!departure)
+ departure = arrival;
+
+ return new TransitPlan.Stop({ name: stop.name,
+ arrival: arrival,
+ departure: departure,
+ agencyTimezoneOffset: departureTzOffset || arrivalTzOffset,
+ coordinate: [stop.lat, stop.lon] });
+ }
+
+ _getHVTCodeFromCatCode(code) {
+ switch (parseInt(code)) {
+ case CatCode.EXPRESS_TRAIN:
+ return HVT.HIGH_SPEED_RAIL_SERVICE;
+ case CatCode.REGIONAL_TRAIN:
+ return HVT.REGIONAL_RAIL_SERVICE;
+ case CatCode.EXPRESS_BUS:
+ return HVT.EXPRESS_BUS_SERVICE;
+ case CatCode.LOCAL_TRAIN:
+ return HVT.SUBURBAN_RAILWAY_SERVICE;
+ case CatCode.SUBWAY:
+ return HVT.METRO_SERVICE;
+ case CatCode.TRAM:
+ return HVT.TRAM_SERVICE;
+ case CatCode.BUS:
+ return HVT.BUS_SERVICE;
+ case CatCode.FERRY:
+ return HVT.WATER_TRANSPORT_SERVICE;
+ case CatCode.TAXI:
+ return HVT.COMMUNAL_TAXI_SERVICE;
+ default:
+ Utils.debug('Unknown catCode: ' + code);
+ return HVT.MISCELLANEOUS_SERVICE;
+ }
+ }
+
+ _getQueryParams() {
+ let points = this._query.filledPoints;
+ let originLocation = points[0].place.location;
+ let destLocation = points.last().place.location;
+ let transitOptions = this._query.transitOptions;
+ let params = { key: this._key,
+ originCoordLat: originLocation.latitude,
+ originCoordLong: originLocation.longitude,
+ destCoordLat: destLocation.latitude,
+ destCoordLong: destLocation.longitude,
+ format: 'json' };
+
+ if (!transitOptions.showAllTransitTypes)
+ params.products = this._getAllowedProductsForQuery();
+
+ if (this._viaId)
+ params.viaId = this._viaId;
+
+ if (this._extendPrevious) {
+ params.context = this._query.arriveBy ? this._scrB : this._scrF;
+ } else {
+ if (this._query.arriveBy)
+ params.searchForArrival = 1;
+
+ if (this._query.time)
+ params.time = this._query.time;
+
+ if (this._query.date)
+ params.date = this._query.date;
+ }
+
+ return params;
+ }
+
+ _getNearbyStopsQueryParams(lat, lon, num, radius) {
+ let params = { key: this._key,
+ originCoordLat: lat,
+ originCoordLong: lon,
+ maxNo: num,
+ r: radius,
+ format: 'json' };
+
+ return params;
+ }
+
+ _getAllowedProductsForQuery() {
+ let products = 0;
+
+ this._query.transitOptions.transitTypes.forEach((type) => {
+ products += this._productCodeForTransitType(type);
+ });
+
+ return products;
+ }
+
+ _productCodeForTransitType(type) {
+ switch (type) {
+ case TransitPlan.RouteType.BUS:
+ return Products.BUS + Products.EXPRESS_BUS + Products.TAXI;
+ case TransitPlan.RouteType.TRAM:
+ return Products.TRAM;
+ case TransitPlan.RouteType.TRAIN:
+ return Products.EXPRESS_TRAIN + Products.LOCAL_TRAIN;
+ case TransitPlan.RouteType.SUBWAY:
+ return Products.SUBWAY;
+ case TransitPlan.RouteType.FERRY:
+ return Products.FERRY;
+ default:
+ return 0;
+ }
+ }
+}
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