114 lines
4.1 KiB
TypeScript
114 lines
4.1 KiB
TypeScript
import * as moment from "moment-timezone";
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import { GeoCoordinates, WateringData, WeatherData, WeatherProvider } from "../../types";
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import { httpJSONRequest } from "../weather";
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async function getDarkSkyWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
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// The Unix timestamp of 24 hours ago.
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const yesterdayTimestamp: number = moment().subtract( 1, "day" ).unix();
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const todayTimestamp: number = moment().unix();
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const DARKSKY_API_KEY = process.env.DARKSKY_API_KEY,
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yesterdayUrl = `https://api.darksky.net/forecast/${DARKSKY_API_KEY}/${coordinates[0]},${coordinates[1]},${yesterdayTimestamp}?exclude=currently,minutely,daily,alerts,flags`,
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todayUrl = `https://api.darksky.net/forecast/${DARKSKY_API_KEY}/${coordinates[0]},${coordinates[1]},${todayTimestamp}?exclude=currently,minutely,daily,alerts,flags`;
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let yesterdayData, todayData;
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try {
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yesterdayData = await httpJSONRequest( yesterdayUrl );
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todayData = await httpJSONRequest( todayUrl );
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} catch (err) {
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// Indicate watering data could not be retrieved if an API error occurs.
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return undefined;
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}
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if ( !todayData.hourly || !todayData.hourly.data || !yesterdayData.hourly || !yesterdayData.hourly.data ) {
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return undefined;
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}
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// The number of hourly forecasts to use from today's data. This will only include elements that contain historic
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// data (not forecast data).
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// Find the first element that contains forecast data.
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const todayElements = Math.min( 24, todayData.hourly.data.findIndex( ( data ) => data.time > todayTimestamp - 60 * 60 ) );
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const samples = [
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// Take as much data as possible from the first elements of today's data.
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...todayData.hourly.data.slice( 0, todayElements ),
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// Take the remaining data from the last elements of yesterday's data.
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...yesterdayData.hourly.data.slice( todayElements - 24 ),
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];
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// Fail if not enough data is available.
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if ( samples.length !== 24 ) {
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return undefined;
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}
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const totals = { temp: 0, humidity: 0, precip: 0 };
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for ( let index = 0; index < samples.length; index++ ) {
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totals.temp += todayData.hourly.data[ index ].temperature;
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totals.humidity += todayData.hourly.data[ index ].humidity;
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totals.precip += todayData.hourly.data[ index ].precipIntensity
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}
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const mostRecentSample = todayElements > 0 ?
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todayData.hourly.data[ todayElements - 1 ] : yesterdayData.hourly.data[ yesterdayData.hourly.data.length - 1 ];
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return {
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temp : totals.temp / 24,
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humidity: totals.humidity / 24 * 100,
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precip: totals.precip,
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raining: mostRecentSample.precipIntensity > 0
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};
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}
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async function getDarkSkyWeatherData( coordinates: GeoCoordinates ): Promise< WeatherData > {
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const DARKSKY_API_KEY = process.env.DARKSKY_API_KEY,
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forecastUrl = `https://api.darksky.net/forecast/${DARKSKY_API_KEY}/${coordinates[0]},${coordinates[1]}?exclude=minutely,alerts,flags`;
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let forecast;
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try {
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forecast = await httpJSONRequest( forecastUrl );
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} catch (err) {
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// Indicate weather data could not be retrieved if an API error occurs.
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return undefined;
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}
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if ( !forecast.currently || !forecast.daily || !forecast.daily.data ) {
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return undefined;
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}
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const weather: WeatherData = {
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temp: Math.floor( forecast.currently.temperature ),
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humidity: Math.floor( forecast.currently.humidity * 100 ),
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wind: Math.floor( forecast.currently.windSpeed ),
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description: forecast.currently.summary,
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// TODO set this
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icon: "",
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region: "",
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city: "",
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minTemp: Math.floor( forecast.daily.data[ 0 ].temperatureMin ),
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maxTemp: Math.floor( forecast.daily.data[ 0 ].temperatureMax ),
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precip: forecast.daily.data[ 0 ].precipIntensity * 24,
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forecast: [ ]
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};
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for ( let index = 0; index < forecast.daily.data.length; index++ ) {
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weather.forecast.push( {
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temp_min: Math.floor( forecast.daily.data[ index ].temperatureMin ),
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temp_max: Math.floor( forecast.daily.data[ index ].temperatureMax ),
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date: forecast.daily.data[ index ].time,
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// TODO set this
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icon: "",
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description: forecast.daily.data[ index ].summary
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} );
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}
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return weather;
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}
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const DarkSkyWeatherProvider: WeatherProvider = {
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getWateringData: getDarkSkyWateringData,
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getWeatherData: getDarkSkyWeatherData
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};
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export default DarkSkyWeatherProvider;
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