Format basic voice hint

Use togpx fork for now (outdated), see PR:
tyrasd/togpx#11

js/format/Gpx.js

@@ -1,11 +1,37 @@
 BR.Gpx = {
-    format: function (geoJson) {
-        const gpx = togpx(geoJson, {
+    format: function (geoJson, turnInstructionMode = 0) {
+        if (!geoJson) return '';
+
+        if (turnInstructionMode > 0) {
+            BR.Gpx._addVoiceHints(geoJson, turnInstructionMode);
+        }
+
+        let gpx = togpx(geoJson, {
+            featureTitle: function () {},
             featureDescription: function () {},
+            transform: {
+                trk: function (trk, feature, coordsList) {
+                    return {
+                        name: feature.properties.name,
+                        trkseg: trk.trkseg,
+                    };
+                },
+                wpt: function (wpt, feature, coord, index) {
+                    return Object.assign(wpt, feature.properties);
+                },
+            },
         });
         const statsComment = BR.Gpx._statsComment(geoJson);
-        const xml = '<?xml version="1.0" encoding="UTF-8"?>' + statsComment + gpx;
-        return BR.Gpx.pretty(xml, 1);
+        gpx = '<?xml version="1.0" encoding="UTF-8"?>' + statsComment + gpx;
+        gpx = BR.Gpx.pretty(gpx);
+        return gpx;
+    },
+
+    _addVoiceHints: function (geoJson, turnInstructionMode) {
+        if (!geoJson.features) return;
+
+        const voiceHints = BR.voiceHints(geoJson);
+        voiceHints.add(turnInstructionMode);
     },
 
     // <!-- track-length = 319 filtered ascend = 2 plain-ascend = -1 cost=533 energy=.0kwh time=44s -->
@@ -35,9 +61,13 @@ BR.Gpx = {
     // modified version of
     // https://gist.github.com/sente/1083506#gistcomment-2254622
     // MIT License, Copyright (c) 2016 Stuart Powers, ES6 version by Jonathan Gruber
-    pretty: function (xml, indentSize = 2) {
+    pretty: function (xml, indentSize = 1) {
         const PADDING = ' '.repeat(indentSize);
         const newline = '\n';
+
+        // Remove all the newlines and then remove all the spaces between tags
+        xml = xml.replace(/\s*(\r\n|\n|\r)\s*/gm, ' ').replace(/>\s+</g, '><');
+
         // break into lines, keep trkpt with subelement ele in single line
         const reg = /(>)(<)(?!ele|\/trkpt)(\/?)/g;
         let pad = 0;

js/format/VoiceHints.js

@@ -0,0 +1,94 @@
+(function () {
+    class Command {
+        constructor(name, locus, orux, symbol, message) {
+            this.name = name;
+            this.locus = locus;
+            this.orux = orux;
+            this.symbol = symbol;
+            this.message = message;
+        }
+    }
+
+    class RoundaboutCommand {
+        constructor(command, exitNumber) {
+            this.name = command.name + exitNumber;
+            this.locus = command.locus + exitNumber;
+            this.orux = command.orux + exitNumber;
+            this.symbol = command.symbol + exitNumber;
+            this.message = command.message + exitNumber;
+        }
+    }
+
+    class RoundaboutLeftCommand {
+        constructor(command, exitNumber) {
+            this.name = command.name + -exitNumber;
+            this.locus = command.locus + -exitNumber;
+            this.orux = command.orux + exitNumber;
+            this.symbol = command.symbol + -exitNumber;
+            this.message = command.message + -exitNumber;
+        }
+    }
+
+    BR.VoiceHints = L.Class.extend({
+        statics: {
+            commands: (function () {
+                return {
+                    1: new Command('C', 1, 1002, 'Straight', 'straight'),
+                    2: new Command('TL', 4, 1000, 'Left', 'left'),
+                    3: new Command('TSLL', 3, 1017, 'TSLL', 'slight left'),
+                    4: new Command('TSHL', 5, 1019, 'TSHL', 'sharp left'),
+                    5: new Command('TR', 7, 1001, 'Right', 'right'),
+                    6: new Command('TSLR', 6, 1016, 'TSLR', 'slight right'),
+                    7: new Command('TSHR', 8, 1018, 'TSHR', 'sharp right'),
+                    8: new Command('KL', 9, 1015, 'TSLL', 'keep left'),
+                    9: new Command('KR', 10, 1014, 'TSLR', 'keep right'),
+                    10: new Command('TU', 13, 1003, 'TU', 'u-turn'),
+                    11: new Command('TRU', 14, 1003, 'TU', 'u-turn'), // Right U-turn
+                    12: new Command('OFFR'), // Off route
+                    13: new Command('RNDB', 26, 1008, 'RNDB', 'Take exit '), // Roundabout
+                    14: new Command('RNLB', 26, 1008, 'RNLB', 'Take exit '), // Roundabout left
+                };
+            })(),
+        },
+
+        initialize: function (geoJson) {
+            this.geoJson = geoJson;
+
+            for (const feature of geoJson.features) {
+                let voicehints = feature?.properties.voicehints;
+                if (voicehints) {
+                    this.voicehints = voicehints;
+                    this.track = feature;
+                    break;
+                }
+            }
+        },
+
+        add: function (turnInstructionMode) {
+            if (!this.voicehints) return;
+
+            for (const hint of this.voicehints) {
+                const [indexInTrack, commandId, exitNumber] = hint;
+                const coord = this.track.geometry.coordinates[indexInTrack];
+                const cmd = this.getCommand(commandId, exitNumber);
+                const properties = { name: cmd.message, sym: cmd.symbol.toLowerCase(), type: cmd.symbol };
+
+                this.geoJson.features.push(turf.point(coord.slice(0, 2), properties));
+            }
+        },
+
+        getCommand: function (id, exitNumber) {
+            let command = BR.VoiceHints.commands[id];
+            if (id === 13) {
+                command = new RoundaboutCommand(command, exitNumber);
+            } else if (id === 14) {
+                command = new RoundaboutLeftCommand(command, exitNumber);
+            }
+            return command;
+        },
+    });
+
+    BR.voiceHints = function (geoJson) {
+        return new BR.VoiceHints(geoJson);
+    };
+})();

package.json

@@ -75,7 +75,7 @@
         "mapbbcode": "MapBBCode/mapbbcode#v1.2.0",
         "osmtogeojson": "^3.0.0-beta.4",
         "regenerator-runtime": "^0.13.7",
-        "togpx": "^0.5.4",
+        "togpx": "JarnoLeConte/togpx#13c65a8",
         "topojson-client": "^3.1.0",
         "url-search-params": "~0.5.0"
     },

tests/format/Gpx.test.js

@@ -1,5 +1,8 @@
 BR = {};
+turf = require('@turf/turf');
 togpx = require('togpx');
+require('leaflet');
+require('../../js/format/VoiceHints.js');
 require('../../js/format/Gpx.js');
 
 const fs = require('fs');
@@ -21,7 +24,7 @@ function adoptGpx(gpx) {
         .split(newline)
         .map((line) => line.replace(/lon="([^"]*)" lat="([^"]*)"/, 'lat="$2" lon="$1"'))
         .join(newline);
-    gpx = gpx.replace(/0"><ele>/g, '"><ele>');
+    gpx = gpx.replace(/(lon|lat)="([-0-9]+.[0-9]+?)0+"/g, '$1="$2"'); // remove trailing zeros
     gpx = gpx.replace('</gpx>\n', '</gpx>');
 
     return gpx;
@@ -36,3 +39,11 @@ test('simple track', () => {
     const gpx = BR.Gpx.format(geoJson);
     expect(gpx).toEqual(brouterGpx);
 });
+
+describe('voice hints', () => {
+    test('5-gpsies', () => {
+        const brouterGpx = BR.Gpx.pretty(read('5-gpsies.gpx'));
+        const gpx = BR.Gpx.format(geoJson, 5);
+        expect(gpx).toEqual(brouterGpx);
+    });
+});

tests/format/data/5-gpsies.gpx

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- track-length = 319 filtered ascend = 2 plain-ascend = -1 cost=533 energy=.0kwh time=44s -->
+<gpx 
+ xmlns="http://www.topografix.com/GPX/1/1" 
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+ xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" 
+ creator="BRouter-1.6.1" version="1.1">
+ <wpt lon="8.468340" lat="49.488794"><name>right</name><sym>right</sym><type>Right</type></wpt>
+ <wpt lon="8.469971" lat="49.488151"><name>left</name><sym>left</sym><type>Left</type></wpt>
+ <trk>
+  <name>5-gpsies</name>
+  <trkseg>
+   <trkpt lon="8.467714" lat="49.488115"><ele>101.5</ele></trkpt>
+   <trkpt lon="8.468340" lat="49.488794"><ele>101.5</ele></trkpt>
+   <trkpt lon="8.468586" lat="49.488698"><ele>101.5</ele></trkpt>
+   <trkpt lon="8.468743" lat="49.488636"><ele>101.5</ele></trkpt>
+   <trkpt lon="8.469161" lat="49.488473"><ele>101.75</ele></trkpt>
+   <trkpt lon="8.469971" lat="49.488151"><ele>103.5</ele></trkpt>
+   <trkpt lon="8.470610" lat="49.488842"><ele>99.75</ele></trkpt>
+  </trkseg>
+ </trk>
+</gpx>

yarn.lock

@@ -7189,7 +7189,7 @@ just-debounce@^1.0.0:
   resolved "https://registry.yarnpkg.com/just-debounce/-/just-debounce-1.0.0.tgz#87fccfaeffc0b68cd19d55f6722943f929ea35ea"
   integrity sha1-h/zPrv/AtozRnVX2cilD+SnqNeo=
 
-jxon@~2.0.0-beta.5:
+jxon@~2.0.0-beta.2:
   version "2.0.0-beta.5"
   resolved "https://registry.yarnpkg.com/jxon/-/jxon-2.0.0-beta.5.tgz#3b6a94104f9801ee682fd056645ff5473d9b343e"
   integrity sha1-O2qUEE+YAe5oL9BWZF/1Rz2bND4=
@@ -10560,13 +10560,12 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/to-utf8/-/to-utf8-0.0.1.tgz#d17aea72ff2fba39b9e43601be7b3ff72e089852"
   integrity sha1-0Xrqcv8vujm55DYBvns/9y4ImFI=
 
-togpx@^0.5.4:
-  version "0.5.4"
-  resolved "https://registry.yarnpkg.com/togpx/-/togpx-0.5.4.tgz#b33dbb0541df04bd6ba4f50b86da953424bb7773"
-  integrity sha1-sz27BUHfBL1rpPULhtqVNCS7d3M=
+togpx@JarnoLeConte/togpx#13c65a8:
+  version "0.5.1"
+  resolved "https://codeload.github.com/JarnoLeConte/togpx/tar.gz/13c65a82e3fbe8694f189d34fb7a339fa07700ec"
   dependencies:
     concat-stream "~1.0.1"
-    jxon "~2.0.0-beta.5"
+    jxon "~2.0.0-beta.2"
     optimist "~0.3.5"
     xmldom "~0.1.17"