1function getWalkScore(address, location) {
2  let deferred = Q.defer();
3  let url = 'http://api.walkscore.com/score?format=json&address='
4    + address + '&lat=' + location.lat + '&lon=' + location.lng
5    + '&wsapikey=' + globalKeys.walkScoreApiKey;
6
7  http.get(url, deferred.resolve);
8
9  return deferred.promise;
10}
11
12router.get('/api/walk/:address', function *(next) {
13  let address = this.params.address;
14  let location = ???
15  let walkScore = yield getWalkScore(address, location);
16
17  this.body = walkScore;
18});

1function getLocationFromGoogle(address) {
2  let deferred = Q.defer();
3  let url = 'https://maps.googleapis.com/maps/api/geocode/json?address='
4    + address + '&key=' + globalKeys.googleApiKey;
5
6  https.get(url, getJsonBody(function(payload) {
7    let location = payload.results[0].geometry.location;
8    deferred.resolve(location);
9  }));
10
11  return deferred.promise;
12}
13// Example usage:
14router.get('/api/walk/:address', function *(next) {
15  let address = this.params.address;
16  let location = yield getLocationFromGoogle(address);
17  let walkScore = yield getWalkScore(location);
18
19  this.body = walkScore;
20});

1function getJsonBody(callback) {
2  return function(response) {
3    let body = '';
4
5    response.on('data', function(data) {
6      body += data;
7    });
8
9    response.on('end', function() {
10      let payload = JSON.parse(body);
11      callback(payload);
12    });
13  }
14}

1» curl localhost:3000/api/walk/2025%201st%20Avenue%20Suite%20500,%20Seattle,%20WA%2098121
2{
3    "status": 1, 
4    "walkscore": 96, 
5    "description": "Walker's Paradise", 
6    "updated": "2015-06-01 19:14:17.776200", 
7    "logo_url": "https://cdn.walk.sc/images/api-logo.png", 
8    "more_info_icon": "https://cdn.walk.sc/images/api-more-info.gif", 
9    "more_info_link": "https://www.redfin.com/how-walk-score-works", 
10    "ws_link": "https://www.walkscore.com/score/2025-1st-Avenue-Suite-500-Seattle-WA-98121/lat=47.6114682/lng=-122.3438233/?utm_source=redfin.com&utm_medium=ws_api&utm_campaign=ws_api", 
11    "help_link": "https://www.redfin.com/how-walk-score-works", 
12    "snapped_lat": 47.6115, 
13    "snapped_lon": -122.3445
14}

1// Example usage:
2// curl localhost:3000/api/stop/fb1522a4c2ba626561...
3let http = require('http');
4
5function getStop(id) {
6  let deferred = Q.defer();
7  let url = 'http://transit.walkscore.com/transit/stop/' + id +
8    '?format=json&wsapikey=' + walkScoreApiKey;
9
10  http.get(url, deferred.resolve);
11
12  return deferred.promise;
13}
14
15router.get('/api/stop/:id', function *() {
16  let id = this.params.id;
17  let stop = yield getStop(id);
18
19  this.body = stop;
20});

1» curl localhost:3000/api/stops/> 2025%201st%20Avenue%20Suite%20500,%20Seattle,%20WA%2098121
2[{
3    "distance": 0.0437115618187228
4  , "name": "1ST AVE & LENORA ST"
5  , "summary_text": "1ST AVE & LENORA ST (0.0 mi)	99, 121"
6  , "summary_html": "<span class="walkscore"><span class="stop">1ST AVE &amp; LENORA ST</span> <span class="distance">(0.0 mi)</span> <span class="Bus">99, 121</span></span>"
7  , "route_summary": [
8      {
9        "category": "Bus"
10      , "agency_url": "http://metro.kingcounty.gov"
11      , "agency": "Metro Transit"
12      , "id": "6fffc9e7af7a9a444b12fd2ae2685281ab42bc1e"
13      , "name": "99"
14    } ...
15  ]
16  , "lon": -122.3442
17  , "lat": 47.6120987
18  , "id": "fb1522a4c2ba6265619b2e7054a9f4c74ea11479"
19}, ...

1» curl localhost:3000/api/stop/fb1522a4c2ba6265619b2e7054a9f4c74ea11479
2{
3  "lat": 47.612098699999997,
4  "route_ids": [
5      "6fffc9e7af7a9a444b12fd2ae2685281ab42bc1e",
6      "4044a2ef14d364ccd302c29cbe1357fda79190f7"
7  ],
8  "lon": -122.3442,
9  "id": "fb1522a4c2ba6265619b2e7054a9f4c74ea11479",
10  "name": "1ST AVE & LENORA ST"
11}

1» curl localhost:3000/api/route/6fffc9e7af7a9a444b12fd2ae2685281ab42bc1e
2{
3  "category": "Bus",
4  "agency": "Metro Transit",
5  "name": "99",
6  "geometry_wkt": "LINESTRING(-122.322449 47.598351,-122.323097 47.598351,-122.323761 47.598351,-122.323753 47.599190,-122.324394 47.599194,-122.325058 47.599194,-122.326363 47.599194,-122.327011 47.599194,-122.327667 47.599201,-122.327927 47.599194,-122.328064 47.599201,-122.328995 47.599201,-122.329102 47.599201,-122.329216 47.599201,-122.329681 47.599201,-122.330223 47.599205,-122.330276 47.599201,-122.331581 47.599205,-122.332886 47.599205,-122.333023 47.599205,-122.334183 47.599205,-122.334183 47.599270,-122.334183 47.599339,-122.334183 47.600044,-122.334183 47.600079,-122.334183 47.600887,-122.334183 47.601513,-122.334183 47.601726,-122.334175 47.602440,-122.334282 47.602558,-122.334351 47.602627,-122.334801 47.603119,-122.334885 47.603203,-122.334938 47.603275,-122.335228 47.603577,-122.335281 47.603638,-122.335594 47.603981,-122.336235 47.604691,-122.336891 47.605404,-122.337479 47.606049,-122.337547 47.606117,-122.338203 47.606834,-122.339104 47.607826,-122.340019 47.608822,-122.340088 47.608898,-122.340919 47.609817,-122.340973 47.609867,-122.341347 47.610272,-122.341423 47.610371,-122.342613 47.611072,-122.343910 47.611839,-122.345207 47.612606,-122.346519 47.613373,-122.347710 47.614078,-122.347809 47.614136,-122.347832 47.614155,-122.348747 47.614697,-122.349693 47.615246,-122.350616 47.615799,-122.351547 47.616352,-122.352509 47.616920,-122.352928 47.616589,-122.353363 47.616253,-122.354225 47.615585,-122.354790 47.615158,-122.354843 47.615101,-122.354866 47.615055,-122.354881 47.615013,-122.354858 47.614952,-122.354797 47.614883,-122.354019 47.614429)",
7  "agency_url": "http://metro.kingcounty.gov",
8  "stop_ids": [
9      "4acb42872963cfc997727e58fba6bdf43d2fbf2d",
10      ...
11      "82ce6a3d3c303dd8368b3e5de9d5791636e3b01b"
12  ],
13  "id": "6fffc9e7af7a9a444b12fd2ae2685281ab42bc1e"
14}

1function initMap() {
2  map = new google.maps.Map(document.getElementById('map'), {
3    center: { lat: 47.61, lng: -122.34 },
4    zoom: 14
5  });
6
7  getRoute().then(function(payload) {
8    var routeCoords = linestringToCoordinates(payload.geometry_wkt);
9    var route = new google.maps.Polyline({
10        path: routeCoords,
11        geodesic: true,
12        strokeColor: '#FF0000',
13        strokeOpacity: 0.8,
14        strokeWeight: 2
15      });
16    route.setMap(map);
17  });
18}

1function getRoute() {
2  var url = "/api/route/6fffc9e7af7a9a444b12fd2ae2685281ab42bc1e";
3  var deferred = Q.defer();
4  var xhr = new XMLHttpRequest();
5
6  xhr.addEventListener('load', function() {
7    deferred.resolve(JSON.parse(this.responseText));
8  });
9  xhr.open("get", url, true);
10  xhr.send();
11
12  return deferred.promise;
13}

1function linestringToCoordinates(linestring) {
2  return linestring
3    .replace(/LINESTRING(/i, '')
4    .replace(/)/i, '')
5    .split(',')
6    .map(function(coord) {
7      var parts = coord.split(' ');
8      return { lat: parseFloat(parts[1]), lng: parseFloat(parts[0]) };
9    });
10}

1// Example usage:
2// curl localhost:3001/api/travel/2025%201st%20Avenue%20Suite%20500,%20Seattle,%20WA%2098121
3function getTravelTimePolygon(origin) {
4  let deferred = Q.defer();
5  let url = 'http://api2.walkscore.com/api/v1/traveltime_polygon/json?wsapikey=' + globalKeys.walkScoreApiKey
6    + '&origin=' + origin.lat + '%2C' + origin.lng + '&mode=bike&time=20';
7
8  http.get(url, deferred.resolve);
9
10  return deferred.promise;
11}
12router.get('/api/travel/:address', function *(next) {
13  let address = this.params.address;
14  let origin = yield getLocationFromGoogle(address);
15  let polygon = yield getTravelTimePolygon(origin);
16
17  this.body = polygon;
18  this.set({ "Content-Type": "application/json" });
19})

1» curl localhost:3000/api/travel/  2025%201st%20Avenue%20Suite%20500,%20Seattle,%20WA%2098121
2{
3    "status": "OK"
4  , "response": {
5      "origin": "47.6114682,-122.3438233"
6    , "geometry": {
7        "type": "MultiPolygon"
8      , "coordinates": [[[
9          [
10            -122.35287965477173
11          , 47.65320077612875
12          ]
13           ...
14        ]]]
15    }
16    , "mode": "bike"
17    , "precision": 3
18    , "time": 20
19  }
20}

1function initMap() {
2  map = new google.maps.Map(document.getElementById('map'), {
3    center: { lat: 47.61, lng: -122.34 },
4    zoom: 13
5  });
6
7  getTravelTimePolygon().then(function(payload) {
8    var polyCoords = convertCoordinates(payload.response.geometry.coordinates);
9    var polygon = new google.maps.Polyline({
10        path: polyCoords,
11        geodesic: true,
12        strokeColor: '#FF0000',
13        strokeOpacity: 0.8,
14        strokeWeight: 2
15      });
16    polygon.setMap(map);
17  });
18}

1function getTravelTimePolygon() {
2  var url = "/api/travel/2025%201st%20Avenue%20Suite%20500,%20Seattle,%20WA%2098121";
3  var deferred = Q.defer();
4  var xhr = new XMLHttpRequest();
5
6  xhr.addEventListener('load', function() {
7    deferred.resolve(JSON.parse(this.responseText));
8  });
9  xhr.open("get", url, true);
10  xhr.send();
11
12  return deferred.promise;
13}

1function convertCoordinates(walkscoreCoords) {
2  var coords = walkscoreCoords[0][0];
3  return coords
4    .map(function(coord) {
5      console.log(coord);
6      return { lat: parseFloat(coord[1]), lng: parseFloat(coord[0]) };
7    });
8}