forked from MapComplete/MapComplete
55 lines
2 KiB
TypeScript
55 lines
2 KiB
TypeScript
import { FeatureSource, FeatureSourceForLayer } from "../FeatureSource"
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import { Feature } from "geojson"
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import { BBox } from "../../BBox"
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import { GeoOperations } from "../../GeoOperations"
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import { Store } from "../../UIEventSource"
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import FilteredLayer from "../../../Models/FilteredLayer"
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/**
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* Allows the retrieval of all features in the requested BBox; useful for one-shot queries;
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*
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* Use a ClippedFeatureSource for a continuously updating featuresource
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*/
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export default class GeoIndexedStore implements FeatureSource {
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public features: Store<Feature[]>
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constructor(features: FeatureSource | Store<Feature[]>) {
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this.features = features["features"] ?? features
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}
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/**
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* Gets the current features within the given bbox.
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*
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* @param bbox
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* @constructor
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*/
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public GetFeaturesWithin(bbox: BBox, strict: boolean = false): Feature[] {
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// TODO optimize
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const bboxFeature = bbox.asGeojsonCached()
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return this.features.data.filter((f) => {
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if (f.geometry.type === "Point") {
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return bbox.contains(<[number, number]>f.geometry.coordinates)
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}
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if (f.geometry.type === "LineString") {
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const intersection = GeoOperations.intersect(
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BBox.get(f).asGeojsonCached(),
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bboxFeature
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)
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return intersection !== undefined
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}
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if (f.geometry.type === "Polygon" || f.geometry.type === "MultiPolygon") {
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return GeoOperations.intersect(f, bboxFeature) !== undefined
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}
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console.log("Calculating intersection between", bboxFeature, "and", f)
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return GeoOperations.intersect(f, bboxFeature) !== undefined
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})
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}
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}
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export class GeoIndexedStoreForLayer extends GeoIndexedStore implements FeatureSourceForLayer {
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readonly layer: FilteredLayer
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constructor(features: FeatureSource | Store<Feature[]>, layer: FilteredLayer) {
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super(features)
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this.layer = layer
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}
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}
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