Refactor watering scale logic flow

routes/adjustmentMethods/AdjustmentMethod.ts

@@ -1,4 +1,4 @@
-import { GeoCoordinates, WateringData } from "../../types";
+import { BaseWateringData, GeoCoordinates } from "../../types";
 import { WeatherProvider } from "../weatherProviders/WeatherProvider";
 
 
@@ -7,10 +7,8 @@ export interface AdjustmentMethod {
 	 * Calculates the percentage that should be used to scale watering time.
 	 * @param adjustmentOptions The user-specified options for the calculation. No checks will be made to ensure the
 	 * AdjustmentOptions are the correct type that the function is expecting or to ensure that any of its fields are valid.
-	 * @param wateringData The basic weather information of the watering site. This may be undefined if an error occurred
-	 * while retrieving the data.
 	 * @param coordinates The coordinates of the watering site.
-	 * @param weatherProvider The WeatherProvider that should be used if the adjustment method needs to obtain any more
+	 * @param weatherProvider The WeatherProvider that should be used if the adjustment method needs to obtain any
 	 * weather data.
 	 * @return A Promise that will be resolved with the result of the calculation, or rejected with an error message if
 	 * the watering scale cannot be calculated.
@@ -18,7 +16,6 @@ export interface AdjustmentMethod {
 	 */
 	calculateWateringScale(
 		adjustmentOptions: AdjustmentOptions,
-		wateringData: WateringData | undefined,
 		coordinates: GeoCoordinates,
 		weatherProvider: WeatherProvider
 	): Promise< AdjustmentMethodResponse >;
@@ -52,6 +49,8 @@ export interface AdjustmentMethodResponse {
 	 * user-configured watering scale instead of using the one returned by the AdjustmentMethod.
 	 */
 	errorMessage?: string;
+	/** The data that was used to calculate the watering scale, or undefined if no data was used. */
+	wateringData: BaseWateringData;
 }
 
 export interface AdjustmentOptions {}

routes/adjustmentMethods/ManualAdjustmentMethod.ts

@@ -6,7 +6,8 @@ import { AdjustmentMethod, AdjustmentMethodResponse } from "./AdjustmentMethod";
  */
 async function calculateManualWateringScale( ): Promise< AdjustmentMethodResponse > {
 	return {
-		scale: undefined
+		scale: undefined,
+		wateringData: undefined
 	}
 }
 

routes/adjustmentMethods/RainDelayAdjustmentMethod.ts

@@ -1,17 +1,20 @@
 import { AdjustmentMethod, AdjustmentMethodResponse, AdjustmentOptions } from "./AdjustmentMethod";
-import { WateringData } from "../../types";
+import { GeoCoordinates, ZimmermanWateringData } from "../../types";
+import { WeatherProvider } from "../weatherProviders/WeatherProvider";
 
 
 /**
  * Only delays watering if it is currently raining and does not adjust the watering scale.
  */
-async function calculateRainDelayWateringScale( adjustmentOptions: RainDelayAdjustmentOptions, wateringData: WateringData | undefined ): Promise< AdjustmentMethodResponse > {
+async function calculateRainDelayWateringScale( adjustmentOptions: RainDelayAdjustmentOptions, coordinates: GeoCoordinates, weatherProvider: WeatherProvider ): Promise< AdjustmentMethodResponse > {
+	const wateringData: ZimmermanWateringData = await weatherProvider.getWateringData( coordinates );
 	const raining = wateringData && wateringData.raining;
 	const d = adjustmentOptions.hasOwnProperty( "d" ) ? adjustmentOptions.d : 24;
 	return {
 		scale: undefined,
 		rawData: { raining: raining ? 1 : 0 },
-		rainDelay: raining ? d : undefined
+		rainDelay: raining ? d : undefined,
+		wateringData: wateringData
 	}
 }
 

routes/adjustmentMethods/ZimmermanAdjustmentMethod.ts

@@ -1,13 +1,15 @@
 import { AdjustmentMethod, AdjustmentMethodResponse, AdjustmentOptions } from "./AdjustmentMethod";
-import { WateringData } from "../../types";
+import { GeoCoordinates, ZimmermanWateringData } from "../../types";
 import { validateValues } from "../weather";
+import { WeatherProvider } from "../weatherProviders/WeatherProvider";
 
 
 /**
  * Calculates how much watering should be scaled based on weather and adjustment options using the Zimmerman method.
  * (https://github.com/rszimm/sprinklers_pi/wiki/Weather-adjustments#formula-for-setting-the-scale)
  */
-async function calculateZimmermanWateringScale( adjustmentOptions: ZimmermanAdjustmentOptions, wateringData: WateringData | undefined ): Promise< AdjustmentMethodResponse > {
+async function calculateZimmermanWateringScale( adjustmentOptions: ZimmermanAdjustmentOptions, coordinates: GeoCoordinates, weatherProvider: WeatherProvider ): Promise< AdjustmentMethodResponse > {
+	const wateringData: ZimmermanWateringData = await weatherProvider.getWateringData( coordinates );
 
 	// Temporarily disabled since OWM forecast data is checking if rain is forecasted for 3 hours in the future.
 	/*
@@ -15,7 +17,8 @@ async function calculateZimmermanWateringScale( adjustmentOptions: ZimmermanAdju
 	if ( wateringData && wateringData.raining ) {
 		return {
 			scale: 0,
-			rawData: { raining: 1 }
+			rawData: { raining: 1 },
+			wateringData: wateringData
 		}
 	}
 	*/
@@ -33,7 +36,8 @@ async function calculateZimmermanWateringScale( adjustmentOptions: ZimmermanAdju
 		return {
 			scale: 100,
 			rawData: rawData,
-			errorMessage: "Necessary field(s) were missing from WateringData."
+			errorMessage: "Necessary field(s) were missing from ZimmermanWateringData.",
+			wateringData: wateringData
 		};
 	}
 
@@ -64,7 +68,8 @@ async function calculateZimmermanWateringScale( adjustmentOptions: ZimmermanAdju
 	return {
 		// Apply all of the weather modifying factors and clamp the result between 0 and 200%.
 		scale: Math.floor( Math.min( Math.max( 0, 100 + humidityFactor + tempFactor + precipFactor ), 200 ) ),
-		rawData: rawData
+		rawData: rawData,
+		wateringData: wateringData
 	}
 }
 

routes/weather.spec.ts

@@ -5,7 +5,7 @@ import * as MockExpressResponse from 'mock-express-response';
 import * as MockDate from 'mockdate';
 
 import { getWateringData } from './weather';
-import { GeoCoordinates, WateringData, WeatherData } from "../types";
+import { GeoCoordinates, ZimmermanWateringData, WeatherData } from "../types";
 import { WeatherProvider } from "./weatherProviders/WeatherProvider";
 
 const expected = require( '../test/expected.json' );
@@ -77,7 +77,7 @@ export class MockWeatherProvider extends WeatherProvider {
         this.mockData = mockData;
     }
 
-    public async getWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
+    public async getWateringData( coordinates: GeoCoordinates ): Promise< ZimmermanWateringData > {
         const data = this.mockData.wateringData;
         if ( !data.weatherProvider ) {
             data.weatherProvider = "mock";
@@ -97,6 +97,6 @@ export class MockWeatherProvider extends WeatherProvider {
 }
 
 interface MockWeatherData {
-    wateringData?: WateringData,
+    wateringData?: ZimmermanWateringData,
     weatherData?: WeatherData
 }

routes/weather.ts

@@ -5,7 +5,7 @@ import * as SunCalc from "suncalc";
 import * as moment from "moment-timezone";
 import * as geoTZ from "geo-tz";
 
-import { GeoCoordinates, TimeData, WateringData, WeatherData } from "../types";
+import { GeoCoordinates, TimeData, WeatherData, BaseWateringData } from "../types";
 import { WeatherProvider } from "./weatherProviders/WeatherProvider";
 import { AdjustmentMethod, AdjustmentMethodResponse, AdjustmentOptions } from "./adjustmentMethods/AdjustmentMethod";
 import ManualAdjustmentMethod from "./adjustmentMethods/ManualAdjustmentMethod";
@@ -121,7 +121,7 @@ function getTimeData( coordinates: GeoCoordinates ): TimeData {
  * @param weather Watering data to use to determine if any restrictions apply.
  * @return A boolean indicating if the watering level should be set to 0% due to a restriction.
  */
-function checkWeatherRestriction( adjustmentValue: number, weather: WateringData ): boolean {
+function checkWeatherRestriction( adjustmentValue: number, weather: BaseWateringData ): boolean {
 
 	const californiaRestriction = ( adjustmentValue >> 7 ) & 1;
 
@@ -211,22 +211,12 @@ export const getWateringData = async function( req: express.Request, res: expres
 		return;
 	}
 
-	// Continue with the weather request
 	let timeData: TimeData = getTimeData( coordinates );
-	let wateringData: WateringData;
-	if ( adjustmentMethod !== ManualAdjustmentMethod || checkRestrictions ) {
-		try {
-			wateringData = await weatherProvider.getWateringData( coordinates );
-		} catch ( err ) {
-			res.send( "Error: " + err );
-			return;
-		}
-	}
 
 	let adjustmentMethodResponse: AdjustmentMethodResponse;
 	try {
 		adjustmentMethodResponse = await adjustmentMethod.calculateWateringScale(
-			adjustmentOptions, wateringData, coordinates, weatherProvider
+			adjustmentOptions, coordinates, weatherProvider
 		);
 	} catch ( err ) {
 		if ( typeof err != "string" ) {
@@ -244,7 +234,19 @@ export const getWateringData = async function( req: express.Request, res: expres
 	}
 
 	let scale = adjustmentMethodResponse.scale;
-	if ( wateringData ) {
+
+	if ( checkRestrictions ) {
+		let wateringData: BaseWateringData = adjustmentMethodResponse.wateringData;
+		// Fetch the watering data if the AdjustmentMethod didn't fetch it and restrictions are being checked.
+		if ( checkRestrictions && !wateringData ) {
+			try {
+				wateringData = await weatherProvider.getWateringData( coordinates );
+			} catch ( err ) {
+				res.send( "Error: " + err );
+				return;
+			}
+		}
+
 		// Check for any user-set restrictions and change the scale to 0 if the criteria is met
 		if ( checkWeatherRestriction( req.params[ 0 ], wateringData ) ) {
 			scale = 0;

routes/weatherProviders/DarkSky.ts

@@ -1,12 +1,12 @@
 import * as moment from "moment-timezone";
 
-import { GeoCoordinates, WateringData, WeatherData } from "../../types";
+import { GeoCoordinates, WeatherData, ZimmermanWateringData } from "../../types";
 import { httpJSONRequest } from "../weather";
 import { WeatherProvider } from "./WeatherProvider";
 
 export default class DarkSkyWeatherProvider extends WeatherProvider {
 
-	public async getWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
+	public async getWateringData( coordinates: GeoCoordinates ): Promise< ZimmermanWateringData > {
 		// The Unix timestamp of 24 hours ago.
 		const yesterdayTimestamp: number = moment().subtract( 1, "day" ).unix();
 		const todayTimestamp: number = moment().unix();
@@ -47,9 +47,16 @@ export default class DarkSkyWeatherProvider extends WeatherProvider {
 
 		const totals = { temp: 0, humidity: 0, precip: 0 };
 		for ( const sample of samples ) {
+			/*
+			 * If temperature or humidity is missing from a sample, the total will become NaN. This is intended since
+			 * calculateWateringScale will treat NaN as a missing value and temperature/humidity can't be accurately
+			 * calculated when data is missing from some samples (since they follow diurnal cycles and will be
+			 * significantly skewed if data is missing for several consecutive hours).
+			 */
 			totals.temp += sample.temperature;
 			totals.humidity += sample.humidity;
-			totals.precip += sample.precipIntensity
+			// This field may be missing from the response if it is snowing.
+			totals.precip += sample.precipIntensity || 0;
 		}
 
 		return {

routes/weatherProviders/OWM.ts

@@ -1,10 +1,10 @@
-import { GeoCoordinates, WateringData, WeatherData } from "../../types";
+import { GeoCoordinates, WeatherData, ZimmermanWateringData } from "../../types";
 import { httpJSONRequest } from "../weather";
 import { WeatherProvider } from "./WeatherProvider";
 
 export default class OWMWeatherProvider extends WeatherProvider {
 
-	public async getWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
+	public async getWateringData( coordinates: GeoCoordinates ): Promise< ZimmermanWateringData > {
 		const OWM_API_KEY = process.env.OWM_API_KEY,
 			forecastUrl = "http://api.openweathermap.org/data/2.5/forecast?appid=" + OWM_API_KEY + "&units=imperial&lat=" + coordinates[ 0 ] + "&lon=" + coordinates[ 1 ];
 

routes/weatherProviders/WeatherProvider.ts

@@ -1,14 +1,14 @@
-import { GeoCoordinates, WateringData, WeatherData } from "../../types";
+import { GeoCoordinates, ZimmermanWateringData, WeatherData } from "../../types";
 
 export class WeatherProvider {
 	/**
-	 * Retrieves weather data necessary for watering level calculations.
+	 * Retrieves weather data necessary for Zimmerman watering level calculations.
 	 * @param coordinates The coordinates to retrieve the watering data for.
-	 * @return A Promise that will be resolved with the WateringData if it is successfully retrieved,
-	 * or rejected with an error message if an error occurs while retrieving the WateringData or the WeatherProvider
+	 * @return A Promise that will be resolved with the ZimmermanWateringData if it is successfully retrieved,
+	 * or rejected with an error message if an error occurs while retrieving the ZimmermanWateringData or the WeatherProvider
 	 * does not support this method.
 	 */
-	getWateringData( coordinates : GeoCoordinates ): Promise< WateringData > {
+	getWateringData( coordinates : GeoCoordinates ): Promise< ZimmermanWateringData > {
 		throw "Selected WeatherProvider does not support getWateringData";
 	}
 

routes/weatherProviders/local.ts

@@ -1,6 +1,6 @@
 import * as express	from "express";
 import { CronJob } from "cron";
-import { GeoCoordinates, WateringData } from "../../types";
+import { GeoCoordinates, ZimmermanWateringData } from "../../types";
 import { WeatherProvider } from "./WeatherProvider";
 
 const count = { temp: 0, humidity: 0 };
@@ -46,9 +46,9 @@ export const captureWUStream = function( req: express.Request, res: express.Resp
 
 export default class LocalWeatherProvider extends WeatherProvider {
 
-	public async getWateringData( coordinates: GeoCoordinates ): Promise< WateringData > {
-		const result: WateringData = {
-			...yesterday as WateringData,
+	public async getWateringData( coordinates: GeoCoordinates ): Promise< ZimmermanWateringData > {
+		const result: ZimmermanWateringData = {
+			...yesterday as ZimmermanWateringData,
 			// Use today's weather if we dont have information for yesterday yet (i.e. on startup)
 			...today,
 			// PWS report "buckets" so consider it still raining if last bucket was less than an hour ago

types.ts

@@ -50,20 +50,23 @@ export interface WeatherDataForecast {
     description: string;
 }
 
+export interface BaseWateringData {
+    /** The WeatherProvider that generated this data. */
+    weatherProvider: WeatherProviderId;
+    /** The total precipitation over the window (in inches). */
+    precip: number;
+}
+
 /**
  * Data from a 24 hour window that is used to calculate how watering levels should be scaled. This should ideally use
  * historic data from the past day, but may also use forecasted data for the next day if historical data is not
  * available.
  */
-export interface WateringData {
-    /** The WeatherProvider that generated this data. */
-    weatherProvider: WeatherProviderId;
+export interface ZimmermanWateringData extends BaseWateringData {
     /** The average temperature over the window (in Fahrenheit). */
     temp: number;
     /** The average humidity over the window (as a percentage). */
     humidity: number;
-    /** The total precipitation over the window (in inches). */
-    precip: number;
     /** A boolean indicating if it is raining at the time that this data was retrieved. */
     raining: boolean;
 }