Add support for DarkSky API

routes/weatherProviders/DarkSky.ts

@@ -0,0 +1,83 @@
+import { GeoCoordinates, WateringData, WeatherData, WeatherProvider } from "../../types";
+import { httpJSONRequest } from "../weather";
+
+async function getDarkSkyWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
+	const DARKSKY_API_KEY = process.env.DARKSKY_API_KEY,
+		forecastUrl = `https://api.darksky.net/forecast/${DARKSKY_API_KEY}/${coordinates[0]},${coordinates[1]}`;
+
+	let forecast;
+	try {
+		forecast = await httpJSONRequest( forecastUrl );
+	} catch (err) {
+		// Indicate watering data could not be retrieved if an API error occurs.
+		return undefined;
+	}
+
+
+	let totalTemp = 0,
+		totalHumidity = 0,
+		totalPrecip = 0;
+
+	const periods = Math.min( forecast.hourly.data.length, 30 );
+	for ( let index = 0; index < periods; index++ ) {
+		totalTemp += forecast.hourly.data[ index ].temperature;
+		totalHumidity += forecast.hourly.data[ index ].humidity * 100;
+		totalPrecip += forecast.hourly.data[ index ].precipIntensity;
+	}
+
+	return {
+		temp: totalTemp / periods,
+		humidity: totalHumidity / periods,
+		precip: totalPrecip,
+		raining: forecast.currently.precipType === "rain"
+	};
+}
+
+async function getDarkSkyWeatherData( coordinates: GeoCoordinates ): Promise< WeatherData > {
+	const DARKSKY_API_KEY = process.env.DARKSKY_API_KEY,
+		forecastUrl = `https://api.darksky.net/forecast/${DARKSKY_API_KEY}/${coordinates[0]},${coordinates[1]}`;
+
+	let forecast;
+	try {
+		forecast = await httpJSONRequest( forecastUrl );
+	} catch (err) {
+		// Indicate watering data could not be retrieved if an API error occurs.
+		return undefined;
+	}
+
+	const weather: WeatherData = {
+		temp: Math.floor( forecast.currently.temperature ),
+		humidity: Math.floor( forecast.currently.humidity * 100 ),
+		wind: Math.floor( forecast.currently.windSpeed ),
+		description: forecast.currently.summary,
+		// TODO set this
+		icon: "",
+
+		region: "",
+		city: "",
+		minTemp: Math.floor( forecast.daily.data[ 0 ].temperatureLow ),
+		maxTemp: Math.floor( forecast.daily.data[ 0 ].temperatureHigh ),
+		precip: forecast.daily.data[ 0 ].precipIntensity * 24,
+		forecast: []
+	};
+
+	for ( let index = 0; index < forecast.daily.data.length; index++ ) {
+		weather.forecast.push( {
+			temp_min: Math.floor( forecast.daily.data[ index ].temperatureLow ),
+			temp_max: Math.floor( forecast.daily.data[ index ].temperatureHigh ),
+			date: forecast.daily.data[ index ].time,
+			// TODO set this
+			icon: "",
+			description: forecast.daily.data[ index ].summary
+		} );
+	}
+
+	return weather;
+}
+
+
+const DarkSkyWeatherProvider: WeatherProvider = {
+	getWateringData: getDarkSkyWateringData,
+	getWeatherData: getDarkSkyWeatherData
+};
+export default DarkSkyWeatherProvider;