mapcomplete/Logic/Osm/Overpass.ts
2020-10-12 01:25:27 +02:00

54 lines
1.8 KiB
TypeScript

import {Bounds} from "../Bounds";
import {TagsFilter} from "../Tags";
import * as $ from "jquery"
import * as OsmToGeoJson from "osmtogeojson";
/**
* Interfaces overpass to get all the latest data
*/
export class Overpass {
private _filter: TagsFilter
public static testUrl: string = null
constructor(filter: TagsFilter) {
this._filter = filter
}
private buildQuery(bbox: string): string {
const filters = this._filter.asOverpass()
let filter = ""
for (const filterOr of filters) {
filter += 'nwr' + filterOr + ';'
}
const query =
'[out:json][timeout:25]' + bbox + ';(' + filter + ');out body;>;out skel qt;'
return "https://overpass-api.de/api/interpreter?data=" + encodeURIComponent(query)
}
queryGeoJson(bounds: Bounds, continuation: ((any) => void), onFail: ((reason) => void)): void {
let query = this.buildQuery("[bbox:" + bounds.south + "," + bounds.west + "," + bounds.north + "," + bounds.east + "]")
if (Overpass.testUrl !== null) {
console.log("Using testing URL")
query = Overpass.testUrl;
}
$.getJSON(query,
function (json, status) {
if (status !== "success") {
console.log("Query failed")
onFail(status);
}
if (json.elements === [] && json.remarks.indexOf("runtime error") > 0) {
console.log("Timeout or other runtime error");
onFail("Runtime error (timeout)")
return;
}
// @ts-ignore
const geojson = OsmToGeoJson.default(json);
continuation(geojson);
}).fail(onFail)
}
}