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import 'mapbox-gl/dist/mapbox-gl.css';
import React, { Component } from 'react';
import { connect } from 'react-redux';
import mapboxgl from 'mapbox-gl';
const calculateMapCenter = (state) => {
if (state.devices.selectedId) {
const position = state.positions.items[state.devices.selectedId] || null;
if (position) {
return [position.longitude, position.latitude];
}
}
return null;
}
const mapFeatureProperties = (state, position) => {
const device = state.devices.items[position.deviceId] || null;
return {
name: device ? device.name : ''
}
}
const mapStateToProps = state => ({
mapCenter: calculateMapCenter(state),
data: {
type: 'FeatureCollection',
features: Object.values(state.positions.items).map(position => ({
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [position.longitude, position.latitude]
},
properties: mapFeatureProperties(state, position)
}))
}
});
class MainMap extends Component {
componentDidMount() {
const map = new mapboxgl.Map({
container: this.mapContainer,
style: 'https://cdn.traccar.com/map/basic.json',
center: [0, 0],
zoom: 1
});
map.on('load', () => this.mapDidLoad(map));
}
loadImage(key, url) {
return new Promise(resolutionFunc => {
const image = new Image();
image.onload = () => {
const canvas = document.createElement('canvas');
canvas.width = image.width * window.devicePixelRatio;
canvas.height = image.height * window.devicePixelRatio;
canvas.style.width = `${image.width}px`;
canvas.style.height = `${image.height}px`;
const context = canvas.getContext('2d');
context.drawImage(image, 0, 0, canvas.width, canvas.height);
this.map.addImage(key, context.getImageData(0, 0, canvas.width, canvas.height), {
pixelRatio: window.devicePixelRatio
});
resolutionFunc()
}
image.src = url;
});
}
mapDidLoad(map) {
this.map = map;
Promise.all([
this.loadImage('background', 'images/background.svg'),
this.loadImage('icon-marker', 'images/icon/marker.svg')
]).then(() => {
this.imagesDidLoad();
});
}
imagesDidLoad() {
this.map.addSource('positions', {
'type': 'geojson',
'data': this.props.data
});
this.map.addLayer({
'id': 'device-background',
'type': 'symbol',
'source': 'positions',
'layout': {
'icon-image': 'background',
'icon-allow-overlap': true,
'text-field': '{name}',
'text-allow-overlap': true,
'text-anchor': 'bottom',
'text-offset': [0, -2],
'text-font': ['Roboto Regular'],
'text-size': 12
},
'paint':{
'text-halo-color': 'white',
'text-halo-width': 1
}
});
this.map.addLayer({
'id': 'device-icon',
'type': 'symbol',
'source': 'positions',
'layout': {
'icon-image': 'icon-marker',
'icon-allow-overlap': true
}
});
this.map.addControl(new mapboxgl.NavigationControl());
this.map.fitBounds(this.calculateBounds(), {
padding: 100,
maxZoom: 9
});
}
calculateBounds() {
if (this.props.data.features) {
const first = this.props.data.features[0].geometry.coordinates;
const bounds = [[...first], [...first]];
for (let feature of this.props.data.features) {
const longitude = feature.geometry.coordinates[0]
const latitude = feature.geometry.coordinates[1]
if (longitude < bounds[0][0]) {
bounds[0][0] = longitude;
} else if (longitude > bounds[1][0]) {
bounds[1][0] = longitude;
}
if (latitude < bounds[0][1]) {
bounds[0][1] = latitude;
} else if (latitude > bounds[1][1]) {
bounds[1][1] = latitude;
}
}
return bounds;
} else {
return [[0, 0], [0, 0]];
}
}
componentDidUpdate(prevProps) {
if (this.map) {
if (prevProps.mapCenter !== this.props.mapCenter) {
this.map.easeTo({
center: this.props.mapCenter
});
}
if (prevProps.data.features !== this.props.data.features) {
this.map.getSource('positions').setData(this.props.data);
}
}
}
render() {
const style = {
position: 'relative',
overflow: 'hidden',
width: '100%',
height: '100%'
};
return <div style={style} ref={el => this.mapContainer = el} />;
}
}
export default connect(mapStateToProps)(MainMap);
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