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import 'mapbox-gl/dist/mapbox-gl.css';
import mapboxgl from 'mapbox-gl';
import { deviceCategories } from '../common/deviceCategories';
let readyListeners = [];
const onMapReady = listener => {
if (!readyListeners) {
listener();
} else {
readyListeners.push(listener);
}
};
const loadImage = (url) => {
return new Promise(imageLoaded => {
const image = new Image();
image.onload = () => imageLoaded(image);
image.src = url;
});
};
const loadIcon = async (key, background, url) => {
const image = await loadImage(url);
const pixelRatio = window.devicePixelRatio;
const canvas = document.createElement('canvas');
canvas.width = background.width * pixelRatio;
canvas.height = background.height * pixelRatio;
canvas.style.width = `${background.width}px`;
canvas.style.height = `${background.height}px`;
const context = canvas.getContext('2d');
context.drawImage(background, 0, 0, canvas.width, canvas.height);
const iconRatio = 0.5;
const imageWidth = canvas.width * iconRatio;
const imageHeight = canvas.height * iconRatio;
context.drawImage(image, (canvas.width - imageWidth) / 2, (canvas.height - imageHeight) / 2, imageWidth, imageHeight);
map.addImage(key, context.getImageData(0, 0, canvas.width, canvas.height), { pixelRatio });
};
const layerClickCallbacks = {};
const layerMouseEnterCallbacks = {};
const layerMauseLeaveCallbacks = {};
const addLayer = (id, source, icon, text, onClick) => {
const layer = {
'id': id,
'type': 'symbol',
'source': source,
'layout': {
'icon-image': icon,
'icon-allow-overlap': true,
},
};
if (text) {
layer.layout = {
...layer.layout,
'text-field': text,
'text-allow-overlap': true,
'text-anchor': 'bottom',
'text-offset': [0, -2],
'text-font': ['Roboto Regular'],
'text-size': 12,
}
layer.paint = {
'text-halo-color': 'white',
'text-halo-width': 1,
}
}
map.addLayer(layer);
layerClickCallbacks[id] = onClick;
map.on('click', id, onClick);
layerMouseEnterCallbacks[id] = () => {
map.getCanvas().style.cursor = 'pointer';
};
map.on('mouseenter', id, layerMouseEnterCallbacks[id]);
layerMauseLeaveCallbacks[id] = () => {
map.getCanvas().style.cursor = '';
};
map.on('mouseleave', id, layerMauseLeaveCallbacks[id]);
}
const removeLayer = (id, source) => {
const popups = element.getElementsByClassName('mapboxgl-popup');
if (popups.length) {
popups[0].remove();
}
map.off('click', id, layerClickCallbacks[id]);
delete layerClickCallbacks[id];
map.off('mouseenter', id, layerMouseEnterCallbacks[id]);
delete layerMouseEnterCallbacks[id];
map.off('mouseleave', id, layerMauseLeaveCallbacks[id]);
delete layerMauseLeaveCallbacks[id];
map.removeLayer(id);
map.removeSource(source);
}
const calculateBounds = features => {
if (features && features.length) {
const first = features[0].geometry.coordinates;
const bounds = [[...first], [...first]];
for (let feature of 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 null;
}
}
const element = document.createElement('div');
element.style.width = '100%';
element.style.height = '100%';
const map = new mapboxgl.Map({
container: element,
style: {
version: 8,
sources: {
osm: {
type: 'raster',
tiles: ["https://tile.openstreetmap.org/{z}/{x}/{y}.png"],
tileSize: 256,
attribution: '© <a target="_top" rel="noopener" href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
},
},
glyphs: 'https://cdn.traccar.com/map/fonts/{fontstack}/{range}.pbf',
layers: [{
id: 'osm',
type: 'raster',
source: 'osm',
}],
},
});
map.addControl(new mapboxgl.NavigationControl());
map.on('load', async () => {
const background = await loadImage('images/background.svg');
await Promise.all(deviceCategories.map(async category => loadIcon(category, background, `images/icon/${category}.svg`)));
if (readyListeners) {
readyListeners.forEach(listener => listener());
readyListeners = null;
}
});
export default {
element,
map,
onMapReady,
addLayer,
removeLayer,
calculateBounds,
};
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