From 16e913caf368faad5f5159e47fb2ccaf6b222d1a Mon Sep 17 00:00:00 2001
From: Matthew Oslan <derpthemeus@gmail.com>
Date: Mon, 13 May 2019 15:14:06 -0400
Subject: [PATCH] Add support for DarkSky API

---
 routes/weather.ts                  |  2 +-
 routes/weatherProviders/DarkSky.ts | 83 ++++++++++++++++++++++++++++++
 types.ts                           | 12 +++++
 3 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 routes/weatherProviders/DarkSky.ts

diff --git a/routes/weather.ts b/routes/weather.ts
index ac9a91f..ab966c8 100644
--- a/routes/weather.ts
+++ b/routes/weather.ts
@@ -337,7 +337,7 @@ export const getWateringData = async function( req: express.Request, res: expres
 		eip:		ipToInt( remoteAddress ),
 		// TODO this may need to be changed (https://github.com/OpenSprinkler/OpenSprinkler-Weather/pull/11#issuecomment-491037948)
 		rawData:    {
-			h: wateringData ? wateringData.humidity : null,
+			h: wateringData ? Math.round( wateringData.humidity * 100) / 100 : null,
 			p: wateringData ? Math.round( wateringData.precip * 100 ) / 100 : null,
 			t: wateringData ? Math.round( wateringData.temp * 10 ) / 10 : null,
 			raining: wateringData ? ( wateringData.raining ? 1 : 0 ) : null
diff --git a/routes/weatherProviders/DarkSky.ts b/routes/weatherProviders/DarkSky.ts
new file mode 100644
index 0000000..4f1b19a
--- /dev/null
+++ b/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;
diff --git a/types.ts b/types.ts
index b9493f9..ba856ea 100644
--- a/types.ts
+++ b/types.ts
@@ -17,22 +17,34 @@ export interface WeatherData {
     temp: number;
     /** The current humidity (as a percentage). */
     humidity: number;
+    /** The current wind speed (in miles per hour). */
     wind: number;
+    /** A human-readable description of the weather. */
     description: string;
+    /** An icon ID that represents the current weather. This will be used in http://openweathermap.org/img/w/<ICON_ID>.png */
     icon: string;
     region: string;
     city: string;
+    /** The forecasted minimum temperature for the current day (in Fahrenheit). */
     minTemp: number;
+    /** The forecasted minimum temperature for the current day (in Fahrenheit). */
     maxTemp: number;
+    /** The forecasted total precipitation for the current day (in inches). */
     precip: number;
     forecast: WeatherDataForecast[]
 }
 
+/** The forecasted weather for a specific day in the future. */
 export interface WeatherDataForecast {
+    /** The forecasted minimum temperature for this day (in Fahrenheit). */
     temp_min: number;
+    /** The forecasted maximum temperature for this day (in Fahrenheit). */
     temp_max: number;
+    /** The timestamp of the day this forecast is for (in Unix epoch seconds). */
     date: number;
+    /** An icon ID that represents the weather at this forecast window. This will be used in http://openweathermap.org/img/w/<ICON_ID>.png */
     icon: string;
+    /** A human-readable description of the weather. */
     description: string;
 }