forked from MapComplete/MapComplete
32 lines
1 KiB
TypeScript
32 lines
1 KiB
TypeScript
import { FeatureSource } from "../FeatureSource"
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import { ImmutableStore, Store } from "../../UIEventSource"
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import { Feature } from "geojson"
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/**
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* A simple, read only feature store.
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*/
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export default class StaticFeatureSource<T extends Feature = Feature> implements FeatureSource<T> {
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public readonly features: Store<T[]>
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constructor(features: Store<T[]> | T[] | { features: T[] } | { features: Store<T[]> }) {
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if (features === undefined) {
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throw "Static feature source received undefined as source"
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}
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let feats: T[] | Store<T[]>
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if (features["features"]) {
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feats = features["features"]
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} else {
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feats = <T[] | Store<T[]>>features
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}
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if (Array.isArray(feats)) {
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this.features = new ImmutableStore(feats)
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} else {
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this.features = feats
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}
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}
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public static fromGeojson<T extends Feature>(geojson: T[]): StaticFeatureSource<T> {
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return new StaticFeatureSource(geojson)
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}
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}
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