270 lines
8.3 KiB
JavaScript
270 lines
8.3 KiB
JavaScript
L.BRouter = L.Class.extend({
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statics: {
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// NOTE: the routing API used here is not public!
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// /brouter?lonlats=1.1,1.2|2.1,2.2|3.1,3.2|4.1,4.2&nogos=-1.1,-1.2,1|-2.1,-2.2,2&profile=shortest&alternativeidx=1&format=kml
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URL_TEMPLATE: '/brouter?lonlats={lonlats}&nogos={nogos}&profile={profile}&alternativeidx={alternativeidx}&format={format}',
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URL_PROFILE_UPLOAD: BR.conf.host + '/brouter/profile',
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PRECISION: 6,
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NUMBER_SEPARATOR: ',',
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GROUP_SEPARATOR: '|',
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ABORTED_ERROR: 'aborted'
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},
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options: {
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},
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initialize: function (options) {
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L.setOptions(this, options);
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this.queue = async.queue(L.bind(function (task, callback) {
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this.getRoute(task.segment, callback);
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}, this), 1);
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// patch to call callbacks on kill for cleanup (loadingTrailer)
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this.queue.kill = function () {
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var aborted = this.tasks;
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this.drain = null;
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this.tasks = [];
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aborted.forEach(function(task) {
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task.callback(L.BRouter.ABORTED_ERROR);
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});
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};
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},
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setOptions: function(options) {
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L.setOptions(this, options);
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},
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getUrlParams: function(latLngs, format) {
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params = {};
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if (this._getLonLatsString(latLngs) != null)
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params.lonlats = this._getLonLatsString(latLngs);
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if (this._getNogosString(this.options.nogos).length > 0)
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params.nogos = this._getNogosString(this.options.nogos);
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if (this.options.profile != null)
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params.profile = this.options.profile;
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params.alternativeidx = this.options.alternative;
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if (format != null) {
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params.format = format;
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} else {
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// do not put values in URL if this is the default value (format===null)
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if (params.profile === BR.conf.profiles[0])
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delete params.profile;
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if (params.alternativeidx == 0)
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delete params.alternativeidx;
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// don't add custom profile, as these are only stored temporarily
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if (params.profile && params.profile.substring(0, 7) === 'custom_') {
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delete params.profile;
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}
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}
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return params;
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},
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parseUrlParams: function(params) {
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var opts = {};
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if (params.lonlats) {
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opts.lonlats = this._parseLonLats(params.lonlats);
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}
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if (params.nogos) {
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opts.nogos = this._parseNogos(params.nogos);
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}
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if (params.alternativeidx) {
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opts.alternative = params.alternativeidx;
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}
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if (params.profile) {
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opts.profile = params.profile;
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}
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return opts;
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},
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getUrl: function(latLngs, format) {
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var urlParams = this.getUrlParams(latLngs, format);
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var args = []
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if (urlParams.lonlats != null && urlParams.lonlats.length > 0)
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args.push(L.Util.template('lonlats={lonlats}', urlParams));
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if (urlParams.nogos != null)
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args.push(L.Util.template('nogos={nogos}', urlParams));
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if (urlParams.profile != null)
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args.push(L.Util.template('profile={profile}', urlParams));
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if (urlParams.alternativeidx != null)
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args.push(L.Util.template('alternativeidx={alternativeidx}', urlParams));
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if (urlParams.format != null)
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args.push(L.Util.template('format={format}', urlParams));
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var prepend_host = (format != null);
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return (prepend_host ? BR.conf.host : '') + '/brouter?' + args.join('&');
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},
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getRoute: function(latLngs, cb) {
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var url = this.getUrl(latLngs, 'geojson'),
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xhr = new XMLHttpRequest();
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if (!url) {
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return cb(new Error('Error getting route URL'));
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}
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xhr.open('GET', url, true);
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xhr.onload = L.bind(this._handleRouteResponse, this, xhr, cb);
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xhr.onerror = L.bind(function(xhr, cb) {
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cb(BR.Util.getError(xhr));
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}, this, xhr, cb);
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xhr.send();
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},
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_handleRouteResponse: function(xhr, cb) {
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var layer,
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geojson;
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if (xhr.status === 200
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&& xhr.responseText
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// application error when not GeoJSON format (text/plain for errors)
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&& xhr.getResponseHeader('Content-Type').split(';')[0] === 'application/vnd.geo+json') {
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// leaflet.spin
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//gpxLayer.fire('data:loaded');
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try {
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geojson = JSON.parse(xhr.responseText);
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layer = L.geoJSON(geojson).getLayers()[0];
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return cb(null, layer);
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} catch(e) {
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console.error(e, xhr.responseText);
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return cb(e);
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}
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} else {
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cb(BR.Util.getError(xhr));
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}
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},
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getRouteSegment: function(l1, l2, cb) {
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this.queue.push({ segment: [l1, l2] }, cb);
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},
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uploadProfile: function(profileId, profileText, cb) {
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var url = L.BRouter.URL_PROFILE_UPLOAD;
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xhr = new XMLHttpRequest();
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// reuse existing profile file
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if (profileId) {
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url += '/' + profileId;
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}
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xhr.open('POST', url, true);
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xhr.onload = L.bind(this._handleProfileResponse, this, xhr, cb);
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xhr.onerror = function(evt) {
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var xhr = this;
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cb('Upload error: ' + xhr.statusText);
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};
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// send profile text only, as text/plain;charset=UTF-8
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xhr.send(profileText);
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},
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_handleProfileResponse: function(xhr, cb) {
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var response;
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if (xhr.status === 200 && xhr.responseText && xhr.responseText.length > 0) {
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response = JSON.parse(xhr.responseText);
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cb(response.error, response.profileid);
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} else {
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cb('Profile error: no or empty response from server');
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}
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},
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_getLonLatsString: function(latLngs) {
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var s = '';
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for (var i = 0; i < latLngs.length; i++) {
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s += this._formatLatLng(latLngs[i]);
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if (i < (latLngs.length - 1)) {
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s += L.BRouter.GROUP_SEPARATOR;
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}
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}
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return s;
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},
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_parseLonLats: function(s) {
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var groups,
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numbers,
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lonlats = [];
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if (!s) {
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return lonlats;
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}
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groups = s.split(L.BRouter.GROUP_SEPARATOR);
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for (var i = 0; i < groups.length; i++) {
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// lng,lat
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numbers = groups[i].split(L.BRouter.NUMBER_SEPARATOR);
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lonlats.push(L.latLng(numbers[1], numbers[0]));
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}
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return lonlats;
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},
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_getNogosString: function(nogos) {
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var s = '';
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for (var i = 0, circle; i < nogos.length; i++) {
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circle = nogos[i];
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s += this._formatLatLng(circle.getLatLng());
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s += L.BRouter.NUMBER_SEPARATOR;
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s += Math.round(circle.getRadius());
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if (circle.options.weight) {
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s += L.BRouter.NUMBER_SEPARATOR;
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s += circle.options.weight;
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}
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if (i < (nogos.length - 1)) {
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s += L.BRouter.GROUP_SEPARATOR;
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}
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}
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return s;
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},
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_parseNogos: function(s) {
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var groups,
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numbers,
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nogos = [];
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if (!s) {
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return nogos;
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}
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groups = s.split(L.BRouter.GROUP_SEPARATOR);
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for (var i = 0; i < groups.length; i++) {
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// lng,lat,radius(,weight)
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numbers = groups[i].split(L.BRouter.NUMBER_SEPARATOR);
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// TODO refactor: pass simple obj, create circle in NogoAreas; use shapeOptions of instance
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// [lat,lng],radius
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// Parse as a nogo circle
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var nogoOptions = {radius: numbers[2]};
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if (numbers.length > 3) {
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nogoOptions.weight = numbers[3];
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}
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nogos.push(L.circle([numbers[1], numbers[0]], nogoOptions));
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}
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return nogos;
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},
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// formats L.LatLng object as lng,lat string
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_formatLatLng: function(latLng) {
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var s = '';
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s += L.Util.formatNum(latLng.lng, L.BRouter.PRECISION);
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s += L.BRouter.NUMBER_SEPARATOR;
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s += L.Util.formatNum(latLng.lat, L.BRouter.PRECISION);
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return s;
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}
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});
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L.bRouter = function (options) {
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return new L.BRouter(options);
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};
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