forked from MapComplete/MapComplete
40 lines
1.5 KiB
TypeScript
40 lines
1.5 KiB
TypeScript
import { Utils } from "../../Utils"
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import { BBox } from "../BBox"
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import Constants from "../../Models/Constants"
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import { FeatureCollection } from "geojson"
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import Locale from "../../UI/i18n/Locale"
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import GeocodingProvider, { GeocodeResult, GeocodingOptions } from "./GeocodingProvider"
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export class NominatimGeocoding implements GeocodingProvider {
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private readonly _host
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private readonly limit: number
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public readonly name = "Nominatim"
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constructor(limit: number = 3, host: string = Constants.nominatimEndpoint) {
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this.limit = limit
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this._host = host
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}
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public search(query: string, options?: GeocodingOptions): Promise<GeocodeResult[]> {
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const b = options?.bbox ?? BBox.global
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const url = `${this._host}search?format=json&limit=${
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this.limit
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}&viewbox=${b.getEast()},${b.getNorth()},${b.getWest()},${b.getSouth()}&accept-language=${
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Locale.language.data
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}&q=${query}`
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return Utils.downloadJson(url)
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}
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async reverseSearch(
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coordinate: { lon: number; lat: number },
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zoom: number = 17,
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language?: string
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): Promise<FeatureCollection> {
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// https://nominatim.org/release-docs/develop/api/Reverse/
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// IF the zoom is low, it'll only return a country instead of an address
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const url = `${this._host}reverse?format=geojson&lat=${coordinate.lat}&lon=${
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coordinate.lon
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}&zoom=${Math.ceil(zoom) + 1}&accept-language=${language}`
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return Utils.downloadJson(url)
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}
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}
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