116 lines
3.9 KiB
TypeScript
116 lines
3.9 KiB
TypeScript
import * as editorlayerindex from "../assets/editor-layer-index.json"
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import {UIEventSource} from "./UIEventSource";
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import {GeoOperations} from "./GeoOperations";
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import {State} from "../State";
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import {Basemap} from "./Leaflet/Basemap";
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/**
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* Calculates which layers are available at the current location
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*/
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export default class AvailableBaseLayers {
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public static layerOverview = AvailableBaseLayers.LoadRasterIndex();
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public availableEditorLayers: UIEventSource<{ id: string, url: string, max_zoom: number, license_url: number, name: string, geometry: any, leafletLayer: any }[]>;
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constructor(state: State) {
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const self = this;
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this.availableEditorLayers =
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state.locationControl.map(
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(currentLocation) => {
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const currentLayers = self.availableEditorLayers?.data;
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const newLayers = AvailableBaseLayers.AvailableLayersAt(currentLocation?.lon, currentLocation?.lat);
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if (currentLayers === undefined) {
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return newLayers;
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}
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if (newLayers.length !== currentLayers.length) {
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return newLayers;
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}
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for (let i = 0; i < newLayers.length; i++) {
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if (newLayers[i].name !== currentLayers[i].name) {
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return newLayers;
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}
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}
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return currentLocation;
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});
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}
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public static AvailableLayersAt(lon: number, lat: number): { url: string, max_zoom: number, license_url: number, name: string, geometry: any }[] {
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const availableLayers = []
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const globalLayers = [];
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for (const i in AvailableBaseLayers.layerOverview) {
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const layer = AvailableBaseLayers.layerOverview[i];
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if (layer.feature.geometry === null) {
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globalLayers.push(layer);
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continue;
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}
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if (lon === undefined || lat === undefined) {
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continue;
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}
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if (GeoOperations.inside([lon, lat], layer.feature)) {
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availableLayers.push(layer);
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}
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}
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return availableLayers.concat(globalLayers);
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}
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private static LoadRasterIndex(): { id: string, url: string, max_zoom: number, license_url: number, name: string, feature: any }[] {
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const layers: { id: string, url: string, max_zoom: number, license_url: number, name: string, feature: any, leafletLayer: any }[] = []
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// @ts-ignore
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const features = editorlayerindex.features;
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for (const i in features) {
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const layer = features[i];
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const props = layer.properties;
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if(props.id === "Bing"){
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// Doesnt work
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continue;
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}
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if (props.overlay) {
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continue;
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}
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if(props.max_zoom < 19){
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continue;
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}
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if (props.url.toLowerCase().indexOf("apikey") > 0) {
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continue;
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}
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if (props.url.toLowerCase().indexOf("{bbox}") > 0) {
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continue;
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}
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const leafletLayer = Basemap.CreateBackgroundLayer(
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props.id,
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props.name,
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props.url,
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props.name,
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props.max_zoom,
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props.type.toLowerCase() === "wms",
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props.type.toLowerCase() === "wmts"
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)
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// Note: if layer.geometry is null, there is global coverage for this layer
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layers.push({
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id: props.id,
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feature: layer,
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url: props.url,
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max_zoom: props.max_zoom,
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license_url: props.license_url,
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name: props.name,
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leafletLayer: leafletLayer
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});
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}
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return layers;
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}
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} |