(http://cheeaun.com/)",
16 | "license": "MIT",
17 | "scripts": {
18 | "start": "parcel serve ./src/index.html --no-hmr",
19 | "start-https": "parcel serve ./src/index.html --no-hmr --https",
20 | "build": "parcel build ./src/index.html --no-cache",
21 | "postbuild": "cpy public/* dist"
22 | },
23 | "dependencies": {
24 | "@mapbox/mapbox-gl-language": "~1.0.0",
25 | "fuse.js": "~6.6.2",
26 | "mapbox-gl": "~2.10.0",
27 | "regenerator-runtime": "~0.13.10",
28 | "workbox-cacheable-response": "~6.5.4",
29 | "workbox-expiration": "~6.5.4",
30 | "workbox-google-analytics": "~6.5.4",
31 | "workbox-routing": "~6.5.4",
32 | "workbox-strategies": "~6.5.4"
33 | },
34 | "devDependencies": {
35 | "@parcel/packager-raw-url": "~2.8.0",
36 | "@parcel/transformer-webmanifest": "~2.8.0",
37 | "cpy-cli": "~4.2.0",
38 | "parcel": "~2.8.0"
39 | },
40 | "browserslist": [
41 | ">0.25%",
42 | "not dead",
43 | "not ie 11",
44 | "not chrome < 51",
45 | "not op_mini all",
46 | "not Android > 1",
47 | "not safari < 10"
48 | ]
49 | }
50 |
--------------------------------------------------------------------------------
/service-worker.js:
--------------------------------------------------------------------------------
1 | self.addEventListener('install', function(event){
2 | console.log('Install');
3 | });
4 |
5 | self.addEventListener('activate', function(event){
6 | console.log('Activate');
7 | });
8 |
9 | var cacheName = 'railroutersg-v2';
10 | caches.delete('railroutersg-v1'); // Delete the old one
11 | var successResponses = /^0|([123]\d\d)|(40[14567])|410$/;
12 |
13 | function fetchAndCache(request){
14 | return fetch(request.clone()).then(function(response){
15 | if (request.method == 'GET' && response && successResponses.test(response.status) && (response.type == 'basic' || /\.(js|png|ttf|woff|woff2)/i.test(request.url) || /fonts\.googleapis\.com/i.test(request.url))){
16 | console.log('Cache', request.url);
17 | caches.open(cacheName).then(function(cache){
18 | cache.put(request, response);
19 | });
20 | }
21 | return response.clone();
22 | });
23 | };
24 |
25 | function cacheOnly(request){
26 | return caches.open(cacheName).then(function(cache){
27 | return cache.match(request);
28 | });
29 | };
30 |
31 | // Fastest strategy from https://github.com/GoogleChrome/sw-toolbox
32 | self.addEventListener('fetch', function(event){
33 | var request = event.request;
34 | var url = request.url;
35 | event.respondWith(new Promise(function(resolve, reject){
36 | var rejected = false;
37 | var reasons = [];
38 |
39 | var maybeReject = function(reason){
40 | reasons.push(reason.toString());
41 | if (rejected){
42 | reject(new Error('Both cache and network failed: "' + reasons.join('", "') + '"'));
43 | } else {
44 | rejected = true;
45 | }
46 | };
47 |
48 | var maybeResolve = function(result){
49 | if (result instanceof Response){
50 | resolve(result);
51 | } else {
52 | maybeReject('No result returned');
53 | }
54 | };
55 |
56 | fetchAndCache(request.clone()).then(maybeResolve, maybeReject);
57 | cacheOnly(request).then(maybeResolve, maybeReject);
58 | }));
59 | });
60 |
--------------------------------------------------------------------------------
/src/sw.js:
--------------------------------------------------------------------------------
1 | import { registerRoute } from 'workbox-routing';
2 | import {
3 | NetworkFirst,
4 | StaleWhileRevalidate,
5 | CacheFirst,
6 | } from 'workbox-strategies';
7 | import { ExpirationPlugin } from 'workbox-expiration';
8 | import { CacheableResponsePlugin } from 'workbox-cacheable-response';
9 | import * as googleAnalytics from 'workbox-google-analytics';
10 |
11 | googleAnalytics.initialize();
12 |
13 | registerRoute(
14 | ({ request }) => request.mode === 'navigate',
15 | new NetworkFirst({
16 | cacheName: 'index',
17 | }),
18 | );
19 |
20 | registerRoute(
21 | ({ request }) =>
22 | request.destination === 'style' || request.destination === 'script',
23 | new StaleWhileRevalidate({
24 | cacheName: 'static-resources',
25 | plugins: [
26 | new ExpirationPlugin({
27 | maxAgeSeconds: 30 * 24 * 60 * 60, // 30 Days
28 | purgeOnQuotaError: true,
29 | }),
30 | ],
31 | }),
32 | );
33 |
34 | registerRoute(
35 | ({ request }) => request.destination === 'image',
36 | new CacheFirst({
37 | cacheName: 'images',
38 | plugins: [
39 | new ExpirationPlugin({
40 | maxEntries: 60,
41 | maxAgeSeconds: 30 * 24 * 60 * 60, // 30 Days
42 | purgeOnQuotaError: true,
43 | }),
44 | new CacheableResponsePlugin({
45 | statuses: [0, 200],
46 | }),
47 | ],
48 | }),
49 | );
50 |
51 | registerRoute(
52 | /.*api\.mapbox\.com\/fonts/,
53 | new CacheFirst({
54 | cacheName: 'mapbox-fonts',
55 | plugins: [
56 | new ExpirationPlugin({
57 | maxEntries: 10,
58 | purgeOnQuotaError: true,
59 | }),
60 | new CacheableResponsePlugin({
61 | statuses: [0, 200],
62 | }),
63 | ],
64 | }),
65 | );
66 |
67 | registerRoute(
68 | /.*(?:tiles\.mapbox|api\.mapbox)\.com.*$/,
69 | new StaleWhileRevalidate({
70 | cacheName: 'mapbox',
71 | plugins: [
72 | new ExpirationPlugin({
73 | maxAgeSeconds: 30 * 24 * 60 * 60, // 30 Days
74 | purgeOnQuotaError: true,
75 | }),
76 | new CacheableResponsePlugin({
77 | statuses: [0, 200],
78 | }),
79 | ],
80 | }),
81 | );
82 |
--------------------------------------------------------------------------------
/assets/icon.svg:
--------------------------------------------------------------------------------
1 |
7 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # RailRouter SG
2 |
3 | 
4 |
5 | 
6 |
7 | **RailRouter SG** is a **progressive web app** that lets you explore MRT and LRT rail routes in Singapore.
8 |
9 | It was built to [scratch my curiosity itch](https://twitter.com/cheeaun/status/683495506031448064) for comparing the _real_ route lines VS the lines shown on Google Maps, which I personally find too _straight_ and skews the perception of how trains actually travel in the real world.
10 |
11 | Available features:
12 |
13 | - **Real** rail route lines, for all train routes.
14 | - Show station names in Chinese and Tamil, besides English.
15 | - Show station building structures, both underground and aboveground.
16 | - Show location of exits (a.k.a. entrances) for (almost) all stations.
17 | - ~~Show train arrival times for _some_ stations.~~
18 | - Possibly, **works offline**.
19 |
20 | ## Previously
21 |
22 | 
23 |
24 | This is the first version, using Google Maps.
25 |
26 | ## Technicalities
27 |
28 | ### For development
29 |
30 | - `npm i` - install dependencies
31 | - `npm start` - starts the server
32 | - `npm run build` - builds the production assets for deployment
33 |
34 | ### Data source
35 |
36 | From my other repo: **[cheeaun/sgraildata](https://github.com/cheeaun/sgraildata)**.
37 |
38 | ⚠️ NOTE: All feature `id`s are removed from `sg-rail.geo.json` in this repo, due to a strange bug in Mapbox GL JS. If the `id` number is too large, errors occur.
39 |
40 | ### Generating station code markers
41 |
42 | 1. Go to https://codepen.io/cheeaun/full/pogQjgV
43 | 2. Paste all the train codes. (`/data/raw/sg-stations-codes.txt` from `sgraildata` repo)
44 | 3. Click "Generate Images" button to download ZIP file of SVG images.
45 | 4. Extract files from the ZIP file.
46 | 5. Go to https://www.facetstudios.com/sprite-generator
47 | 6. Drag/Upload all SVG files to the site.
48 | 7. Uncheck "Export for retina". Check "Generate JSON".
49 | 8. Click "Download Files" button.
50 | 9. Extract files from ZIP file.
51 | 10. Move & rename sprite image to `src/stations.png`. Optimize the image with [TinyPNG](https://tinypng.com/).
52 | 11. Move & rename sprite JSON to `scripts/sprite.json`.
53 | 12. Run `node scripts/gen-stations-sprite.js` which will generate `src/stations.json`.
54 |
55 | ### Tamil characters rendering
56 |
57 | This is done with [maplibre-gl-complex-text](https://github.com/wipfli/maplibre-gl-complex-text).
58 |
59 | Related issue: [Tamil characters rendered wrongly](https://github.com/mapbox/mapbox-gl-js/issues/9894).
60 |
61 | ## License
62 |
63 | - Data: © [LTA](https://www.lta.gov.sg/content/ltagov/en/terms-of-use.html) © [Data.gov.sg](https://data.gov.sg/privacy-and-website-terms#site-terms) © [SMRT](https://www.smrt.com.sg/Terms-of-Use) © [SBS](https://www.sbstransit.com.sg/conditions-for-use)
64 | - Everything else: [MIT](http://cheeaun.mit-license.org/)
65 |
--------------------------------------------------------------------------------
/src/index.html:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 | RailRouter SG – Explore MRT and LRT rail routes in Singapore –
6 | Singapore train map
7 |
8 |
9 |
13 |
19 |
20 |
21 |
22 |
23 |
28 |
33 |
34 |
40 |
41 |
42 |
43 |
44 |
45 |
46 |
47 |
48 |
RailRouter SG
49 |
50 | Explore MRT and
51 | LRT rail routes in Singapore.
52 | Zoom in to see the location of the stations and their
53 | entrances/exits.
54 |
55 |
56 | Built
60 | by
61 | @cheeaun.
63 | ©
65 | LTA
72 | ©
74 | Data.gov.sg
80 | ©
82 | SMRT
86 | ©
88 | SBS
92 |
93 |
94 | Sister sites:
95 | 🚍 BusRouter SG
98 | 🚖 TaxiRouter SG
101 |
102 |
103 |
105 | Legend
106 |
107 |
108 |
109 | High crowd density
110 |
112 |
113 | Moderate crowd density
114 |
116 |
117 | Station entrance/exit
118 |
120 |
121 |
141 |
143 |
144 |
151 |
152 |
153 |
157 |
222 | ${name}
223 | ${name_zh_Hans}
224 | ${name_ta}
225 |
226 |
227 |
234 | `;
235 | $station.classList.add('open');
236 | // arrivalTimes.mount(name);
237 | stationsExits.mount(exitsData[station_codes], feature);
238 | wikipedia.mount(wikipedia_slug);
239 | },
240 | unmount: () => {
241 | document.title = origTitle;
242 | currentStation = null;
243 | $station.classList.remove('open');
244 | $station.classList.remove('min');
245 |
246 | const zoom = map.getZoom();
247 | const isScreenLarge = window.innerWidth >= 800;
248 | map.easeTo({
249 | zoom: zoom - 1,
250 | pitch: 0,
251 | bearing: 0,
252 | padding: isScreenLarge ? { left: 0 } : { bottom: 0 },
253 | duration: 500,
254 | });
255 | },
256 | };
257 |
258 | let arrivalTimeout;
259 | const arrivalTimes = {
260 | render: (name) => {
261 | const $arrivals = $station.querySelector('.arrivals');
262 | fetch(
263 | `https://connectv3.smrt.wwprojects.com/smrt/api/train_arrival_time_by_id/?station=${encodeURIComponent(
264 | name,
265 | )}`,
266 | )
267 | .then((res) => res.json())
268 | .then(({ results }) => {
269 | if (!results.length) {
270 | throw new Error('No results');
271 | }
272 | const html = results
273 | .filter((result, pos, arr) => {
274 | // Filter weird destination names
275 | if (/do not board/i.test(result.next_train_destination))
276 | return false;
277 | return (
278 | arr.findIndex(
279 | (r) =>
280 | r.next_train_destination == result.next_train_destination,
281 | ) == pos
282 | );
283 | })
284 | .map((result) => {
285 | let arrow = '⇢';
286 | const isWeirdName = /do not board/i.test(
287 | result.next_train_destination,
288 | );
289 | if (result.next_train_destination == result.mrt) {
290 | arrow = '⇠';
291 | }
292 | let dest = result.next_train_destination;
293 | if (isWeirdName) {
294 | if (/do not board/i.test(result.subseq_train_destination)) {
295 | // Weird name again
296 | dest = result.mrt;
297 | arrow = '⇠';
298 | } else {
299 | dest = result.subseq_train_destination;
300 | }
301 | }
302 | return `
303 | | ${arrow} ${dest} |
304 | ${result.next_train_arr} |
305 | ${formatArriveTime(result.subseq_train_arr)} |
306 |
`;
307 | })
308 | .join('');
309 |
310 | $arrivals.innerHTML = `Arrival times
311 |
312 |
313 | ${html}
314 |
315 |
316 |
317 | |
318 | Arrival times powered by SMRT Trains Ltd.
319 | |
320 |
321 |
322 |
`;
323 | })
324 | .catch((e) => {
325 | $arrivals.innerHTML = `Arrival times
326 | No arrival times available
`;
327 | });
328 | },
329 | mount: (name) => {
330 | clearTimeout(arrivalTimeout);
331 | arrivalTimes.render(name);
332 | arrivalTimeout = setTimeout(() => {
333 | requestAnimationFrame(() => {
334 | arrivalTimes.render(name);
335 | });
336 | }, 30 * 1000); // every 30 seconds
337 | },
338 | unmount: () => {
339 | clearTimeout(arrivalTimeout);
340 | },
341 | };
342 |
343 | const wikipedia = {
344 | mount: (slug) => {
345 | const $wikipedia = $station.querySelector('.wikipedia');
346 | fetch(
347 | `https://en.wikipedia.org/api/rest_v1/page/summary/${encodeURIComponent(
348 | slug,
349 | )}`,
350 | )
351 | .then((res) => res.json())
352 | .then((res) => {
353 | const {
354 | content_urls: {
355 | desktop: { page },
356 | },
357 | extract_html,
358 | thumbnail: { source, width, height },
359 | } = res;
360 | const html = `
361 |
})
365 |
366 |
367 |
${exits.length} Exit${
421 | exits.length === 1 ? '' : 's'
422 | }
423 |
424 | ${html}
425 |
426 | ${
427 | hasDups
428 | ? 'Note: The data unfortunately contains duplicated exits. Please check your surroundings before proceeding.
'
429 | : ''
430 | }
431 | ${
432 | hasMissingExits
433 | ? 'Note: The data unfortunately contains missing exits. They could also be under construction or not opened yet.
'
434 | : ''
435 | }
436 | `;
437 | $station.addEventListener('click', stationsExits.onExitClick);
438 | },
439 | unmount: () => {
440 | $station.removeEventListener('click', stationsExits.onExitClick);
441 | },
442 | };
443 |
444 | // format HH:MM for startTime and endTime
445 | const formatTime = (datetime, showAMPM = false) => {
446 | const date = new Date(datetime);
447 | let hours = date.getHours();
448 | let minutes = date.getMinutes();
449 | const ampm = hours >= 12 ? 'pm' : 'am';
450 | hours = hours % 12;
451 | hours = hours ? hours : 12; // the hour '0' should be '12'
452 | minutes = minutes < 10 ? `0${minutes}` : minutes;
453 | const strTime = `${hours}:${minutes}${showAMPM ? ampm : ''}`;
454 | return strTime;
455 | };
456 |
457 | (async () => {
458 | await mapLoaded;
459 | const layers = map.getStyle().layers;
460 | // console.log(layers);
461 |
462 | const labelLayerId = layers.find(
463 | (l) => l.type === 'symbol' && l.layout['text-field'],
464 | ).id;
465 |
466 | const data = await geojsonFetch.then((res) => res.json());
467 | const exitsFeatures = data.features.filter((f) => {
468 | return f.properties.stop_type === 'entrance';
469 | });
470 | // Group entrances by station_codes
471 | exitsFeatures.forEach((f) => {
472 | const {
473 | properties: { station_codes },
474 | } = f;
475 | if (!exitsData[station_codes]) exitsData[station_codes] = [];
476 | exitsData[station_codes].push(f);
477 | });
478 |
479 | map.addSource('rail', {
480 | type: 'geojson',
481 | data,
482 | buffer: 0,
483 | });
484 |
485 | // LINES
486 | map.addLayer(
487 | {
488 | id: 'lines-case',
489 | source: 'rail',
490 | filter: ['==', ['geometry-type'], 'LineString'],
491 | type: 'line',
492 | minzoom: 11,
493 | layout: {
494 | 'line-cap': 'round',
495 | 'line-join': 'round',
496 | },
497 | paint: {
498 | 'line-width': ['interpolate', ['linear'], ['zoom'], 10, 1, 22, 30],
499 | 'line-color': lineColorsExpression,
500 | 'line-opacity': 0.25,
501 | 'line-blur': ['interpolate', ['linear'], ['zoom'], 10, 0, 22, 14],
502 | },
503 | },
504 | 'building-extrusion',
505 | );
506 | map.addLayer(
507 | {
508 | id: 'lines',
509 | source: 'rail',
510 | filter: ['==', ['geometry-type'], 'LineString'],
511 | type: 'line',
512 | layout: {
513 | 'line-cap': 'round',
514 | 'line-join': 'round',
515 | },
516 | paint: {
517 | 'line-width': ['interpolate', ['linear'], ['zoom'], 0, 1, 22, 2],
518 | 'line-color': lineColorsExpression,
519 | },
520 | },
521 | labelLayerId,
522 | );
523 | map.addLayer({
524 | id: 'lines-label',
525 | source: 'rail',
526 | filter: ['==', ['geometry-type'], 'LineString'],
527 | type: 'symbol',
528 | minzoom: 13,
529 | layout: {
530 | 'symbol-placement': 'line',
531 | 'text-field': ['get', 'name'],
532 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
533 | 'text-letter-spacing': 0.1,
534 | 'text-size': ['interpolate', ['linear'], ['zoom'], 13, 12, 22, 16],
535 | 'text-pitch-alignment': 'viewport',
536 | 'text-rotation-alignment': 'map',
537 | 'text-max-angle': 30,
538 | 'text-padding': 1,
539 | },
540 | paint: {
541 | 'text-color': lineColorsExpression,
542 | 'text-halo-blur': 1,
543 | 'text-halo-color': '#fff',
544 | 'text-halo-width': 2,
545 | },
546 | });
547 |
548 | // EXITS
549 | map.addLayer({
550 | id: 'exits',
551 | source: 'rail',
552 | filter: ['==', ['get', 'stop_type'], 'entrance'],
553 | type: 'symbol',
554 | minzoom: 14,
555 | layout: {
556 | 'icon-image': 'exit',
557 | 'icon-size': ['interpolate', ['linear'], ['zoom'], 14, 0.25, 17, 0.6],
558 | 'icon-allow-overlap': true,
559 | },
560 | });
561 | map.addLayer({
562 | id: 'exits-label',
563 | source: 'rail',
564 | filter: ['==', ['get', 'stop_type'], 'entrance'],
565 | type: 'symbol',
566 | minzoom: 14,
567 | layout: {
568 | 'text-field': ['get', 'name'],
569 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
570 | 'text-size': ['interpolate', ['linear'], ['zoom'], 14, 5, 17, 13],
571 | 'text-ignore-placement': true,
572 | 'text-allow-overlap': true,
573 | },
574 | paint: {
575 | 'text-color': '#000',
576 | 'text-translate-anchor': 'viewport',
577 | 'text-translate': [
578 | 'interpolate',
579 | ['linear'],
580 | ['zoom'],
581 | 14,
582 | ['literal', [0, 1]],
583 | 16,
584 | ['literal', [0, 2]],
585 | ],
586 | },
587 | });
588 |
589 | // STATIONS
590 | map.addLayer({
591 | id: 'stations-point',
592 | source: 'rail',
593 | filter: ['==', ['get', 'stop_type'], 'station'],
594 | type: 'symbol',
595 | minzoom: 10,
596 | maxzoom: 14,
597 | layout: {
598 | 'icon-image': ['get', 'station_colors'],
599 | 'icon-size': [
600 | 'interpolate',
601 | ['exponential', 2],
602 | ['zoom'],
603 | 10,
604 | 0.2,
605 | 14,
606 | 1,
607 | ],
608 | 'icon-allow-overlap': true,
609 | },
610 | });
611 | map.addLayer({
612 | id: 'stations-point-label',
613 | source: 'rail',
614 | filter: [
615 | 'all',
616 | ['==', ['get', 'stop_type'], 'station'],
617 | ['in', '-', ['get', 'station_codes']],
618 | ],
619 | type: 'symbol',
620 | minzoom: 10,
621 | maxzoom: 13,
622 | layout: {
623 | 'symbol-avoid-edges': true,
624 | 'text-field': ['get', 'name'],
625 | 'text-size': ['interpolate', ['linear'], ['zoom'], 10, 10, 13, 12],
626 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
627 | 'text-variable-anchor': ['left', 'right'],
628 | 'text-radial-offset': [
629 | 'interpolate',
630 | ['linear'],
631 | ['zoom'],
632 | 10,
633 | ['*', 0.25, ['get', 'network_count']],
634 | 13,
635 | ['*', 0.5, ['get', 'network_count']],
636 | ],
637 | 'text-max-width': 20,
638 | 'text-optional': true,
639 | },
640 | paint: {
641 | 'text-color': 'rgba(0,0,0,.5)',
642 | 'text-halo-color': 'rgba(255,255,255,.5)',
643 | 'text-halo-width': 1,
644 | 'text-halo-blur': 1,
645 | },
646 | });
647 | map.addLayer({
648 | id: 'stations-label-non-en',
649 | source: 'rail',
650 | filter: ['==', ['get', 'stop_type'], 'station'],
651 | type: 'symbol',
652 | minzoom: 13,
653 | layout: {
654 | 'text-field': [
655 | 'format',
656 | ['get', 'name_zh-Hans'],
657 | {},
658 | '\n',
659 | {},
660 | ['get', 'name_ta'],
661 | {
662 | // 'text-font': ['literal', ['Noto Sans Tamil Medium']],
663 | // 'font-scale': 1.1, // Slightly larger text size for Tamil
664 | },
665 | ],
666 | 'text-size': ['interpolate', ['linear'], ['zoom'], 13, 12, 16, 16],
667 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
668 | 'text-anchor': 'top',
669 | 'text-offset': [0, 0.8],
670 | 'text-max-width': 20,
671 | 'text-optional': true,
672 | },
673 | paint: {
674 | 'text-halo-color': '#fff',
675 | 'text-halo-width': 2,
676 | 'text-halo-blur': 1,
677 | },
678 | });
679 | map.addLayer({
680 | id: 'stations-label',
681 | source: 'rail',
682 | filter: ['==', ['get', 'stop_type'], 'station'],
683 | type: 'symbol',
684 | minzoom: 13,
685 | layout: {
686 | 'text-field': ['get', 'name'],
687 | 'text-size': ['interpolate', ['linear'], ['zoom'], 13, 12, 16, 16],
688 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
689 | 'text-anchor': 'bottom',
690 | 'text-offset': [0, -0.8],
691 | 'text-max-width': 20,
692 | // 'text-allow-overlap': true,
693 | 'icon-image': ['get', 'station_codes'],
694 | 'icon-size': ['interpolate', ['linear'], ['zoom'], 13, 0.3, 15, 0.5],
695 | 'icon-ignore-placement': true,
696 | 'icon-allow-overlap': true,
697 | },
698 | paint: {
699 | 'text-halo-color': '#fff',
700 | 'text-halo-width': 2,
701 | 'text-halo-blur': 1,
702 | },
703 | });
704 |
705 | // STATION BUILDINGS
706 | map.addLayer(
707 | {
708 | id: 'buildings-underground',
709 | source: 'rail',
710 | filter: [
711 | 'all',
712 | ['==', ['get', 'type'], 'subway'],
713 | ['==', ['get', 'underground'], true],
714 | ],
715 | type: 'fill',
716 | minzoom: 14,
717 | paint: {
718 | 'fill-antialias': false,
719 | 'fill-color': 'hsla(6, 63%, 60%, 0.3)',
720 | 'fill-outline-color': '#d96659',
721 | },
722 | },
723 | 'building-extrusion',
724 | );
725 | map.addLayer(
726 | {
727 | id: 'buildings-aboveground',
728 | source: 'rail',
729 | filter: [
730 | 'all',
731 | ['==', ['get', 'type'], 'subway'],
732 | ['==', ['get', 'underground'], false],
733 | ],
734 | type: 'fill-extrusion',
735 | minzoom: 14,
736 | paint: {
737 | 'fill-extrusion-color': '#d96659',
738 | 'fill-extrusion-height': 20,
739 | 'fill-extrusion-opacity': 0.3,
740 | },
741 | },
742 | 'building-extrusion',
743 | );
744 |
745 | // const handleSource = (e) => {
746 | // if (e.sourceId !== 'rail' || e.sourceDataType === 'metadata') return;
747 | // map.off('sourcedata', handleSource);
748 |
749 | // const lineFeatures = map.querySourceFeatures('rail', {
750 | // filter: ['==', ['geometry-type'], 'LineString'],
751 | // });
752 |
753 | // const linesBounds = {};
754 | // lineFeatures.forEach((l) => {
755 | // const {
756 | // properties: { name },
757 | // geometry: { type, coordinates },
758 | // } = l;
759 | // if (!linesBounds[name]) linesBounds[name] = new mapboxgl.LngLatBounds();
760 | // coordinates.flat(type === 'LineString' ? 0 : 1).forEach((c) => {
761 | // linesBounds[name].extend(c);
762 | // });
763 | // });
764 | // console.log(lineFeatures, linesBounds);
765 | // };
766 | // map.on('sourcedata', handleSource);
767 |
768 | map.on('click', 'stations-label', (e) => {
769 | location.hash = `stations/${e.features[0].properties.name}`;
770 | // stationView.mount(e.features[0]);
771 | });
772 |
773 | // Handle onhashchange
774 | const onHashChange = () => {
775 | // hash looks like this "stations/[NAME]", get the NAME, find it in the geojson and show it
776 | const name = decodeURIComponent(location.hash.split('/')[1] || '');
777 | const stationData =
778 | name &&
779 | data.features.find((f) => {
780 | const { name: fName, station_codes } = f.properties;
781 | const hasName = (fName || '').toLowerCase() === name.toLowerCase();
782 | if (hasName) return true;
783 | // Also works if "stations/[CODE]" e.g. "stations/NS1"
784 | const codes = station_codes.split('-');
785 | // Array.includes but case-insensitive
786 | return codes.some((c) => c.toLowerCase() === name.toLowerCase());
787 | });
788 | if (stationData) {
789 | stationView.mount(stationData);
790 | } else {
791 | stationView.unmount();
792 | }
793 | };
794 | window.addEventListener('hashchange', onHashChange);
795 | requestAnimationFrame(onHashChange);
796 |
797 | document.querySelector('.sheet-close').onclick = (e) => {
798 | e.preventDefault();
799 | location.hash = '';
800 | // stationView.unmount();
801 | };
802 |
803 | map.on('movestart', (e) => {
804 | if (!e.originalEvent) return; // Not initiated by humans
805 | if (!currentStation) return;
806 | $station.classList.add('min');
807 | });
808 |
809 | $station.onclick = (e) => {
810 | if ($station.classList.contains('min')) {
811 | e.preventDefault();
812 | e.stopPropagation();
813 | $station.classList.remove('min');
814 | }
815 | };
816 |
817 | map.on('mouseenter', 'stations-label', () => {
818 | mapCanvas.style.cursor = 'pointer';
819 | });
820 | map.on('mouseleave', 'stations-label', () => {
821 | mapCanvas.style.cursor = '';
822 | });
823 |
824 | setTimeout(() => {
825 | map.loadImage(require('./exit.png'), (e, img) => {
826 | map.addImage('exit', img);
827 | });
828 |
829 | const canvas = document.createElement('canvas');
830 | const ctx = canvas.getContext('2d', {
831 | willReadFrequently: true,
832 | });
833 | map.loadImage(require('./stations.png'), (e, img) => {
834 | if (!img) return;
835 | canvas.width = img.width;
836 | canvas.height = img.height;
837 | ctx.drawImage(img, 0, 0);
838 | stationsSprite.forEach((s) => {
839 | const [code, ...args] = s;
840 | const imageData = ctx.getImageData(...args);
841 | map.addImage(code, imageData);
842 | });
843 | });
844 |
845 | stationsData = data.features.filter((f) => {
846 | return f.properties.stop_type === 'station';
847 | });
848 | fuse = new Fuse(stationsData, {
849 | distance: 5,
850 | includeMatches: true,
851 | keys: [
852 | 'properties.name',
853 | 'properties.name_zh-Hans',
854 | 'properties.name_ta',
855 | {
856 | name: 'station_codes',
857 | getFn: (obj) => {
858 | return obj.properties.station_codes.split('-');
859 | },
860 | weight: 0.5,
861 | },
862 | ],
863 | });
864 |
865 | map.addSource('walks', {
866 | type: 'geojson',
867 | data: require('./sg-rail-walks.geo.json'),
868 | buffer: 0,
869 | });
870 | map.addLayer(
871 | {
872 | id: 'walks-case',
873 | source: 'walks',
874 | filter: ['==', ['geometry-type'], 'LineString'],
875 | type: 'line',
876 | minzoom: 14,
877 | layout: {
878 | 'line-cap': 'round',
879 | 'line-join': 'round',
880 | },
881 | paint: {
882 | 'line-width': ['interpolate', ['linear'], ['zoom'], 15, 3, 22, 15],
883 | 'line-color': 'rgba(255, 255, 255, .75)',
884 | },
885 | },
886 | 'building-extrusion',
887 | );
888 | map.addLayer(
889 | {
890 | id: 'walks',
891 | source: 'walks',
892 | filter: ['==', ['geometry-type'], 'LineString'],
893 | type: 'line',
894 | minzoom: 14,
895 | layout: {
896 | 'line-cap': 'round',
897 | 'line-join': 'round',
898 | },
899 | paint: {
900 | 'line-width': ['interpolate', ['linear'], ['zoom'], 15, 1, 22, 5],
901 | 'line-color': 'skyblue',
902 | 'line-dasharray': [0.5, 2],
903 | },
904 | },
905 | 'building-extrusion',
906 | );
907 | map.addLayer(
908 | {
909 | id: 'walks-label',
910 | source: 'walks',
911 | filter: ['==', ['geometry-type'], 'Point'],
912 | type: 'symbol',
913 | minzoom: 15.5,
914 | layout: {
915 | 'text-field': ['concat', ['get', 'duration_min'], ' mins'],
916 | 'text-font': ['DIN Pro Medium', 'Arial Unicode MS Regular'],
917 | 'text-size': ['interpolate', ['linear'], ['zoom'], 15, 12, 22, 16],
918 | 'text-anchor': 'top',
919 | 'text-offset': [0, 0.8],
920 | 'icon-image': 'walk',
921 | 'icon-size': 0.5,
922 | },
923 | paint: {
924 | 'text-color': 'dodgerblue',
925 | 'text-halo-color': 'rgba(255,255,255,.75)',
926 | 'text-halo-width': 2,
927 | 'icon-halo-color': 'rgba(255,255,255,.75)',
928 | 'icon-halo-width': 2,
929 | },
930 | },
931 | 'exits-label',
932 | );
933 | map.on('mouseenter', 'walks-label', () => {
934 | mapCanvas.style.cursor = 'pointer';
935 | });
936 | map.on('mouseleave', 'walks-label', () => {
937 | mapCanvas.style.cursor = '';
938 | });
939 | map.on('click', 'walks-label', (e) => {
940 | const f = e.features[0];
941 | const {
942 | duration_min,
943 | station_codes_1,
944 | station_codes_2,
945 | exit_name_1,
946 | exit_name_2,
947 | } = f.properties;
948 | const station1 = stationsData.find(
949 | (d) => d.properties.station_codes === station_codes_1,
950 | );
951 | const station2 = stationsData.find(
952 | (d) => d.properties.station_codes === station_codes_2,
953 | );
954 | alert(
955 | `${duration_min}-min walk between ${station1.properties.name} (Exit ${exit_name_1}) and ${station2.properties.name} (Exit ${exit_name_2})`,
956 | );
957 | });
958 | map.loadImage(require('./walk.png'), (e, img) => {
959 | map.addImage('walk', img);
960 | });
961 | }, 300);
962 |
963 | let markers = [];
964 | map.on('zoomend', () => {
965 | const zoom = map.getZoom();
966 | const large = zoom >= 12;
967 | const larger = zoom >= 15;
968 | markers.forEach((m) => {
969 | m.getElement().classList.toggle('large', large);
970 | m.getElement().classList.toggle('larger', larger);
971 | m.getElement().style.cursor = zoom >= 13 ? 'pointer' : '';
972 | });
973 | });
974 | const renderCrowd = () => {
975 | markers.forEach((m) => {
976 | m.remove();
977 | });
978 |
979 | fetch('https://sg-rail-crowd.cheeaun.workers.dev/')
980 | .then((res) => res.json())
981 | .then((results) => {
982 | const zoom = map.getZoom();
983 | const large = zoom >= 12;
984 | const larger = zoom >= 15;
985 | const crowdedData = [];
986 | results.data.forEach((r) => {
987 | const { station, crowdLevel } = r;
988 | if (!crowdLevel || (crowdLevel !== 'h' && crowdLevel !== 'm')) return;
989 | const f = data.features.find((f) =>
990 | f.properties.station_codes.split('-').includes(station),
991 | );
992 |
993 | if (!f) return;
994 |
995 | crowdedData.push(r);
996 |
997 | // const markerCrowdLabel = Math.random() < 0.5 ? 'h' : 'm';
998 | const markerCrowdLabel = crowdLevel;
999 |
1000 | const el = document.createElement('div');
1001 | const width = 50;
1002 | const height = 50;
1003 | el.className = `crowd-marker crowd-marker-${markerCrowdLabel} ${
1004 | large ? 'large' : ''
1005 | } ${larger ? 'larger' : ''}`;
1006 | el.style.width = `${width}px`;
1007 | el.style.height = `${height}px`;
1008 |
1009 | // Add markers to the map.
1010 | const marker = new mapboxgl.Marker(el)
1011 | .setLngLat(f.geometry.coordinates)
1012 | .addTo(map);
1013 | markers.push(marker);
1014 | });
1015 |
1016 | if (crowdedData.length) {
1017 | const startTime = formatTime(crowdedData[0].startTime);
1018 | const endTime = formatTime(crowdedData[0].endTime);
1019 |
1020 | console.log({
1021 | startTime,
1022 | endTime,
1023 | });
1024 | console.table(
1025 | crowdedData.map((d) => ({
1026 | station: d.station,
1027 | crowdLevel: d.crowdLevel,
1028 | })),
1029 | );
1030 | }
1031 |
1032 | if (results.data.length) {
1033 | $crowdedTiming.innerHTML = `Crowded time interval: ${formatTime(
1034 | results.data[0].startTime,
1035 | )} - ${formatTime(results.data[0].endTime, true)}`;
1036 | } else {
1037 | $crowdedTiming.innerHTML = 'Crowded time interval: N/A';
1038 | }
1039 | })
1040 | .catch((e) => {
1041 | $crowdedTiming.innerHTML = 'Crowded time interval: N/A';
1042 | })
1043 | .finally(() => {
1044 | setTimeout(() => {
1045 | requestAnimationFrame(renderCrowd);
1046 | }, 1000 * 60); // 1 minute
1047 | });
1048 | };
1049 | renderCrowd();
1050 | })();
1051 |
1052 | class SearchControl {
1053 | options = {
1054 | onClick: () => {},
1055 | };
1056 |
1057 | constructor(options) {
1058 | Object.assign(this.options, options);
1059 | }
1060 |
1061 | onAdd(map) {
1062 | this._map = map;
1063 | const container = document.createElement('div');
1064 | container.className = 'mapboxgl-ctrl mapboxgl-ctrl-group';
1065 | container.innerHTML = `
1066 |
1069 | `;
1070 | container.querySelector('button').onclick = this.options.onClick;
1071 | this._container = container;
1072 | return this._container;
1073 | }
1074 | onRemove() {
1075 | this._container.parentNode.removeChild(this._container);
1076 | this._map = undefined;
1077 | }
1078 | }
1079 | function focusSearchField() {
1080 | $search.hidden = false;
1081 | $searchField.focus();
1082 | setTimeout(() => {
1083 | $searchField.focus();
1084 | }, 1500);
1085 | }
1086 | map.addControl(
1087 | new SearchControl({
1088 | onClick: focusSearchField,
1089 | }),
1090 | 'bottom-right',
1091 | );
1092 | document.onkeydown = (e) => {
1093 | if (/(input|textarea|select)/i.test(e.target.tagName)) return;
1094 | if (
1095 | e.code.toLowerCase() === 'slash' ||
1096 | e.key === '/' ||
1097 | e.keyCode === 191 ||
1098 | e.which === 191
1099 | ) {
1100 | e.preventDefault();
1101 | focusSearchField();
1102 | }
1103 | };
1104 |
1105 | $searchField.oninput = () => {
1106 | if (!fuse) return;
1107 | const value = $searchField.value.trim();
1108 | const results = fuse.search(value);
1109 | $searchResults.innerHTML = results
1110 | .slice(0, 10)
1111 | .map((r) => {
1112 | const {
1113 | item: { properties },
1114 | matches,
1115 | } = r;
1116 | const firstNameMatch = matches.find((m) => /name/i.test(m.key));
1117 | const { name: stationName, station_codes, station_colors } = properties;
1118 | const name =
1119 | properties[
1120 | firstNameMatch ? firstNameMatch.key.replace(/.+\./, '') : 'name'
1121 | ];
1122 | const html = `
1123 |
1124 |
1125 | ${station_codes
1126 | .split('-')
1127 | .map(
1128 | (c, i) =>
1129 | `${c.replace(
1130 | /^([a-z]+)/i,
1131 | '$1 ',
1132 | )}`,
1133 | )
1134 | .join('')}
1135 |
1136 | ${name}
1137 |
1138 | `;
1139 | return html;
1140 | })
1141 | .join('');
1142 | };
1143 |
1144 | $searchField.onkeydown = (e) => {
1145 | // Enter
1146 | if (e.code.toLowerCase() === 'enter' || e.keyCode === 13 || e.which === 13) {
1147 | $searchField.blur();
1148 | $searchResults.querySelector('a')?.click();
1149 | }
1150 | };
1151 |
1152 | $searchCancel.onclick = () => {
1153 | $search.hidden = true;
1154 | $searchField.value = '';
1155 | };
1156 |
1157 | $searchResults.onclick = (e) => {
1158 | // const { target } = e;
1159 | // if (target.tagName.toLowerCase() !== 'li') return;
1160 | // const { codes } = target.dataset;
1161 | // const feature = stationsData.find(
1162 | // (d) => d.properties.station_codes === codes,
1163 | // );
1164 | // stationView.mount(feature);
1165 | $search.hidden = true;
1166 | $searchField.value = '';
1167 | document.body.scrollTo(0, 0);
1168 | };
1169 |
1170 | if ('serviceWorker' in navigator) {
1171 | window.addEventListener('load', function () {
1172 | navigator.serviceWorker.register(new URL('./sw.js', import.meta.url), {
1173 | type: 'module',
1174 | });
1175 | });
1176 | }
1177 |
1178 | map.addControl(
1179 | new mapboxgl.NavigationControl({
1180 | showZoom: false,
1181 | visualizePitch: true,
1182 | }),
1183 | 'bottom-right',
1184 | );
1185 |
--------------------------------------------------------------------------------
/src/sg-rail-walks.geo.json:
--------------------------------------------------------------------------------
1 | {
2 | "type": "FeatureCollection",
3 | "features": [
4 | {
5 | "type": "Feature",
6 | "properties": {},
7 | "geometry": {
8 | "type": "LineString",
9 | "coordinates": [
10 | [
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86 | ]
87 | }
88 | },
89 | {
90 | "type": "Feature",
91 | "properties": {
92 | "duration_min": 2,
93 | "station_codes_1": "DT21",
94 | "station_codes_2": "CC2",
95 | "exit_name_1": "B",
96 | "exit_name_2": "D"
97 | },
98 | "geometry": {
99 | "type": "Point",
100 | "coordinates": [
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103 | ]
104 | }
105 | },
106 | {
107 | "type": "Feature",
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109 | "geometry": {
110 | "type": "LineString",
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346 | 1.300007
347 | ]
348 | ]
349 | }
350 | },
351 | {
352 | "type": "Feature",
353 | "properties": {
354 | "duration_min": 10,
355 | "station_codes_1": "DT21",
356 | "station_codes_2": "EW12-DT14",
357 | "exit_name_1": "A",
358 | "exit_name_2": "C"
359 | },
360 | "geometry": {
361 | "type": "Point",
362 | "coordinates": [
363 | 103.8532587562409,
364 | 1.2990534453026883
365 | ]
366 | }
367 | },
368 | {
369 | "type": "Feature",
370 | "properties": {},
371 | "geometry": {
372 | "type": "LineString",
373 | "coordinates": [
374 | [
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377 | ],
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