110 lines
2.9 KiB
TypeScript
110 lines
2.9 KiB
TypeScript
import { useCallback, useEffect, useState, useMemo } from 'react';
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import type {
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LngLatBoundsLike,
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LngLat,
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MapLayerEventType,
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Style
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} from 'maplibre-gl';
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import type { Feature, Geometry } from 'geojson';
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import { getMapStyle, getLayerName, LayersMap } from './styles';
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import { useMapLibre } from './MapLibre';
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export function useFitBounds() {
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const map = useMapLibre();
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return useCallback((bbox: LngLatBoundsLike) => {
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map.fitBounds(bbox, { padding: 100 });
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}, []);
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}
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export function useFlyTo() {
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const map = useMapLibre();
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return useCallback((zoom: number, center: [number, number]) => {
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map.flyTo({ zoom, center });
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}, []);
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}
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export function useEvent(eventName: string, callback: EventListener) {
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return useEffect(() => {
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addEventListener(eventName, callback);
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return () => removeEventListener(eventName, callback);
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}, [eventName, callback]);
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}
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export type EventHandler = (event: {
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features: Feature<Geometry>[];
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lngLat: LngLat;
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}) => void;
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export function useMapEvent(
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eventName: string,
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callback: EventHandler,
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target?: string
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) {
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const map = useMapLibre();
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return useEffect(() => {
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if (target) {
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map.on(eventName as keyof MapLayerEventType, target, callback as any);
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} else {
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map.on(eventName, callback);
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}
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return () => {
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if (target) {
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map.off(eventName as keyof MapLayerEventType, target, callback as any);
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} else {
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map.off(eventName, callback);
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}
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};
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}, [map, eventName, target, callback]);
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}
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function optionalLayersMap(optionalLayers: string[]): LayersMap {
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return Object.fromEntries(
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optionalLayers.map((layer) => [
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layer,
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{
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configurable: layer != 'cadastres',
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enabled: true,
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opacity: 70,
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name: getLayerName(layer)
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}
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])
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);
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}
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export function useStyle(
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optionalLayers: string[],
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onStyleChange: (style: Style) => void
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) {
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const [styleId, setStyle] = useState('ortho');
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const [layers, setLayers] = useState(() => optionalLayersMap(optionalLayers));
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const setLayerEnabled = (layer: string, enabled: boolean) =>
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setLayers((optionalLayers) => {
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optionalLayers[layer].enabled = enabled;
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return { ...optionalLayers };
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});
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const setLayerOpacity = (layer: string, opacity: number) =>
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setLayers((optionalLayers) => {
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optionalLayers[layer].opacity = opacity;
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return { ...optionalLayers };
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});
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const enabledLayers = useMemo(
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() => Object.entries(layers).filter(([, { enabled }]) => enabled),
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[layers]
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);
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const style = useMemo(
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() =>
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getMapStyle(
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styleId,
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enabledLayers.map(([layer]) => layer),
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Object.fromEntries(
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enabledLayers.map(([layer, { opacity }]) => [layer, opacity])
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)
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),
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[styleId, enabledLayers]
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);
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useEffect(() => onStyleChange(style), [style]);
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return { style, layers, setStyle, setLayerEnabled, setLayerOpacity };
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}
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