mirror of
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77 lines
2.0 KiB
TypeScript
77 lines
2.0 KiB
TypeScript
import Logger from './Logger';
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import shim from './shim';
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const logger = Logger.create('geolocation-node');
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interface CurrentPositionResponseCoordinates {
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longitude: number;
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latitude: number;
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altitude: number;
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}
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interface CurrentPositionResponse {
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timestamp: number;
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coords: CurrentPositionResponseCoordinates;
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}
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interface CurrentPositionOptions {}
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type GeoipService = ()=> Promise<CurrentPositionResponse>;
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const fetchJson = async (url: string): Promise<any> => {
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let r = await shim.fetch(url);
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if (!r.ok) throw new Error(`Could not get geolocation: ${await r.text()}`);
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r = await r.json();
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return r;
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};
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const geoipServices: Record<string, GeoipService> = {
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ipwhois: async (): Promise<CurrentPositionResponse> => {
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const r = await fetchJson('https://ipwho.is/');
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if (!('latitude' in r) || !('longitude' in r)) throw new Error(`Invalid geolocation response: ${r ? JSON.stringify(r) : '<null>'}`);
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return {
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timestamp: Date.now(),
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coords: {
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longitude: r.longitude,
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altitude: 0,
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latitude: r.latitude,
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},
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};
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},
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geoplugin: async (): Promise<CurrentPositionResponse> => {
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const r = await fetchJson('http://www.geoplugin.net/json.gp');
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if (!('geoplugin_latitude' in r) || !('geoplugin_longitude' in r)) throw new Error(`Invalid geolocation response: ${r ? JSON.stringify(r) : '<null>'}`);
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return {
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timestamp: Date.now(),
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coords: {
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longitude: Number(r.geoplugin_longitude),
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altitude: 0,
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latitude: Number(r.geoplugin_latitude),
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},
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};
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},
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};
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export default class {
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public static async currentPosition(options: CurrentPositionOptions = null) {
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if (!options) options = {};
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for (const [serviceName, handler] of Object.entries(geoipServices)) {
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try {
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const response = await handler();
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return response;
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} catch (error) {
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logger.warn(`Could not get geolocation from service "${serviceName}"`);
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logger.warn(error);
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}
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}
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throw new Error('Could not get geolocation from any of the services');
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}
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}
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