tracktracker/front/index.js

138 lines
3.6 KiB
JavaScript

require('ol/ol.css');
const {Map, View} = require('ol');
const TileLayer = require('ol/layer/Tile').default;
const XYZSource = require('ol/source/XYZ').default;
const VectorLayer = require('ol/layer/Vector').default;
const VectorSource = require('ol/source/Vector').default;
const Feature = require('ol/Feature').default;
const Point = require('ol/geom/Point').default;
const LineString = require('ol/geom/LineString').default;
const proj = require('ol/proj');
const {Style, Fill, Stroke, Circle} = require('ol/style');
const color = require('color');
// Map background
const mapboxToken = 'pk.eyJ1IjoibWF0dGVvZGVsYWJyZSIsImEiOiJjazUxaWNsdXcwdWhjM2\
9tc2xndXJoNGtxIn0.xELwMerqJLFimIqU6RxnZw';
const backgroundSource = new XYZSource({
url: 'https://api.mapbox.com/' + [
'styles', 'v1', 'mapbox', 'streets-v11',
'tiles', '512', '{z}', '{x}', '{y}',
].join('/') + `?access_token=${mapboxToken}`,
tileSize: [512, 512],
});
const backgroundLayer = new TileLayer({
source: backgroundSource,
});
// Data overlay
const dataSource = new VectorSource();
const SERVER = window.origin;
fetch(SERVER + '/network').then(res => res.json()).then(network =>
{
const stopPoints = Object.entries(network.stops)
.map(([stopId, stop]) =>
{
const feature = new Feature({
type: 'stop',
color: network.lines[stop.lines[0]].color,
geometry: new Point(proj.fromLonLat([stop.lon, stop.lat])),
});
feature.setId(stopId);
return feature;
});
const segmentLines = Object.entries(network.segments)
.map(([segmentId, segment]) =>
{
const feature = new Feature({
type: 'segment',
color: network.lines[segment.lines[0]].color,
geometry: new LineString(segment.nodes.map(
({lat, lon}) => proj.fromLonLat([lon, lat])
)),
});
feature.setId(segmentId);
return feature;
});
dataSource.addFeatures(
stopPoints.concat(segmentLines)
);
});
const makeBorderColor = mainColor =>
{
const hsl = color(mainColor).hsl();
hsl.color = Math.max(0, hsl.color[2] -= 20);
return hsl.hex();
};
const dataLayer = new VectorLayer({
source: dataSource,
style: feature =>
{
if (feature.get('type') === 'stop')
{
return new Style({
image: new Circle({
fill: new Fill({
color: feature.get('color'),
}),
stroke: new Stroke({
color: makeBorderColor(feature.get('color')),
width: 2,
}),
radius: 6,
}),
});
}
else if (feature.get('type') === 'segment')
{
return [
new Style({
stroke: new Stroke({
color: makeBorderColor(feature.get('color')),
width: 8,
}),
}),
new Style({
stroke: new Stroke({
color: feature.get('color'),
width: 6,
}),
}),
];
}
},
});
// Setup map
const map = new Map({
target: 'map',
layers: [
backgroundLayer,
dataLayer,
],
view: new View({
center: proj.fromLonLat([3.88, 43.605]),
zoom: 13,
maxZoom: 22,
constrainResolution: true,
}),
});
module.exports = map;