forked from MapComplete/MapComplete
38 lines
1.1 KiB
TypeScript
38 lines
1.1 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(
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features:
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| Store<T[]>
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| T[]
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| { features: T[] }
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| { features: Store<T[]> }
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) {
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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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