Refactor common weather methods into utils class

CHANGELOG.md

@@ -28,9 +28,10 @@ Special thanks to: @rejas, @sdetweil
 - Updated da translation
 - Rework weather module
   - Make sure smhi provider api only gets a maximum of 6 digits coordinates (#2955)
-  - Use fetch instead of XMLHttpRequest in weatherprovider
-  - Reworked how weatherproviders handle units
-  - Use unix() method for parsing times, fix suntimes on the way
+  - Use fetch instead of XMLHttpRequest in weatherprovider (#2935)
+  - Reworked how weatherproviders handle units (#2849)
+  - Use unix() method for parsing times, fix suntimes on the way (#2950)
+  - Refactor conversion functions into utils class (#2958)
 
 ### Fixed
 

modules/default/weather/providers/envcanada.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider, WeatherObject */
+/* global WeatherProvider, WeatherObject, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -163,7 +163,7 @@ WeatherProvider.register("envcanada", {
 			currentWeather.temperature = this.cacheCurrentTemp;
 		}
 
-		currentWeather.windSpeed = currentWeather.convertWindToMs(ECdoc.querySelector("siteData currentConditions wind speed").textContent);
+		currentWeather.windSpeed = WeatherUtils.convertWindToMs(ECdoc.querySelector("siteData currentConditions wind speed").textContent);
 
 		currentWeather.windDirection = ECdoc.querySelector("siteData currentConditions wind bearing").textContent;
 

modules/default/weather/providers/ukmetoffice.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider, WeatherObject */
+/* global WeatherProvider, WeatherObject, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -101,8 +101,8 @@ WeatherProvider.register("ukmetoffice", {
 							currentWeather.temperature = rep.T;
 							currentWeather.feelsLikeTemp = rep.F;
 							currentWeather.precipitation = parseInt(rep.Pp);
-							currentWeather.windSpeed = currentWeather.convertWindToMetric(rep.S);
-							currentWeather.windDirection = currentWeather.valueWindDirection(rep.D);
+							currentWeather.windSpeed = WeatherUtils.convertWindToMetric(rep.S);
+							currentWeather.windDirection = WeatherUtils.convertWindDirection(rep.D);
 							currentWeather.weatherType = this.convertWeatherType(rep.W);
 						}
 					}

modules/default/weather/providers/weatherflow.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider, WeatherObject */
+/* global WeatherProvider, WeatherObject, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -31,7 +31,7 @@ WeatherProvider.register("weatherflow", {
 
 				currentWeather.humidity = data.current_conditions.relative_humidity;
 				currentWeather.temperature = data.current_conditions.air_temperature;
-				currentWeather.windSpeed = currentWeather.convertWindToMs(data.current_conditions.wind_avg);
+				currentWeather.windSpeed = WeatherUtils.convertWindToMs(data.current_conditions.wind_avg);
 				currentWeather.windDirection = data.current_conditions.wind_direction;
 				currentWeather.weatherType = data.forecast.daily[0].icon;
 				currentWeather.sunrise = moment.unix(data.forecast.daily[0].sunrise);

modules/default/weather/providers/weathergov.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider, WeatherObject */
+/* global WeatherProvider, WeatherObject, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -205,7 +205,7 @@ WeatherProvider.register("weathergov", {
 
 		currentWeather.date = moment(currentWeatherData.timestamp);
 		currentWeather.temperature = currentWeatherData.temperature.value;
-		currentWeather.windSpeed = currentWeather.convertWindToMs(currentWeatherData.windSpeed.value);
+		currentWeather.windSpeed = WeatherUtils.convertWindToMs(currentWeatherData.windSpeed.value);
 		currentWeather.windDirection = currentWeatherData.windDirection.value;
 		currentWeather.minTemperature = currentWeatherData.minTemperatureLast24Hours.value;
 		currentWeather.maxTemperature = currentWeatherData.maxTemperatureLast24Hours.value;

modules/default/weather/weather.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider */
+/* global WeatherProvider, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -58,7 +58,7 @@ Module.register("weather", {
 
 	// Return the scripts that are necessary for the weather module.
 	getScripts: function () {
-		return ["moment.js", "weatherprovider.js", "weatherobject.js", "suncalc.js", this.file("providers/" + this.config.weatherProvider.toLowerCase() + ".js")];
+		return ["moment.js", "weatherutils.js", "weatherprovider.js", "weatherobject.js", "suncalc.js", this.file("providers/" + this.config.weatherProvider.toLowerCase() + ".js")];
 	},
 
 	// Override getHeader method.
@@ -201,59 +201,6 @@ Module.register("weather", {
 		return roundValue === "-0" ? 0 : roundValue;
 	},
 
-	/**
-	 * Convert temp (from degrees C) into imperial or metric unit depending on
-	 * your config
-	 *
-	 * @param {number} tempInC the temperature you want to convert in celsius
-	 * @returns {number} the temperature converted to what is defined in the config
-	 */
-	convertTemp(tempInC) {
-		return this.config.tempUnits === "imperial" ? this.roundValue(tempInC * 1.8 + 32) : tempInC;
-	},
-
-	/**
-	 *
-	 * Convert wind speed (from meters per second) into whatever is defined in
-	 * your config. Can be 'beaufort', 'kmh', 'knots, 'imperial' (mph) or
-	 * 'metric' (mps)
-	 *
-	 * @param {number} windInMS the windspeed you want to convert
-	 * @returns {number} the windspeed converted to what is defined in the config
-	 */
-	convertWind(windInMS) {
-		switch (this.config.windUnits) {
-			case "beaufort":
-				return this.beaufortWindSpeed(windInMS);
-			case "kmh":
-				return (windInMS * 3600) / 1000;
-			case "knots":
-				return windInMS * 1.943844;
-			case "imperial":
-				return windInMS * 2.2369362920544;
-			case "metric":
-			default:
-				return windInMS;
-		}
-	},
-
-	/**
-	 * Convert wind (from m/s) to beaufort scale
-	 *
-	 * @param {number} speedInMS the windspeed you want to convert
-	 * @returns {number} the speed in beaufort
-	 */
-	beaufortWindSpeed(speedInMS) {
-		const windInKmh = (speedInMS * 3600) / 1000;
-		const speeds = [1, 5, 11, 19, 28, 38, 49, 61, 74, 88, 102, 117, 1000];
-		for (const [index, speed] of speeds.entries()) {
-			if (speed > windInKmh) {
-				return index;
-			}
-		}
-		return 12;
-	},
-
 	addFilters() {
 		this.nunjucksEnvironment().addFilter(
 			"formatTime",
@@ -280,7 +227,7 @@ Module.register("weather", {
 			"unit",
 			function (value, type) {
 				if (type === "temperature") {
-					value = this.convertTemp(value) + "°";
+					value = this.roundValue(WeatherUtils.convertTemp(value, this.config.tempUnits)) + "°";
 					if (this.config.degreeLabel) {
 						if (this.config.tempUnits === "metric") {
 							value += "C";
@@ -303,7 +250,7 @@ Module.register("weather", {
 				} else if (type === "humidity") {
 					value += "%";
 				} else if (type === "wind") {
-					value = this.convertWind(value);
+					value = WeatherUtils.convertWind(value, this.config.windUnits);
 				}
 				return value;
 			}.bind(this)

modules/default/weather/weatherobject.js

@@ -1,4 +1,4 @@
-/* global SunCalc */
+/* global SunCalc, WeatherUtils */
 
 /* MagicMirror²
  * Module: Weather
@@ -69,40 +69,6 @@ class WeatherObject {
 		}
 	}
 
-	/*
-	 * Convert the wind direction cardinal to value
-	 */
-	valueWindDirection(windDirection) {
-		const windCardinals = {
-			N: 0,
-			NNE: 22,
-			NE: 45,
-			ENE: 67,
-			E: 90,
-			ESE: 112,
-			SE: 135,
-			SSE: 157,
-			S: 180,
-			SSW: 202,
-			SW: 225,
-			WSW: 247,
-			W: 270,
-			WNW: 292,
-			NW: 315,
-			NNW: 337
-		};
-
-		return windCardinals.hasOwnProperty(windDirection) ? windCardinals[windDirection] : null;
-	}
-
-	convertWindToMetric(mph) {
-		return mph / 2.2369362920544;
-	}
-
-	convertWindToMs(kmh) {
-		return kmh * 0.27777777777778;
-	}
-
 	nextSunAction() {
 		return moment().isBetween(this.sunrise, this.sunset) ? "sunset" : "sunrise";
 	}
@@ -111,8 +77,8 @@ class WeatherObject {
 		if (this.feelsLikeTemp) {
 			return this.feelsLikeTemp;
 		}
-		const windInMph = this.windSpeed * 2.2369362920544;
-		const tempInF = (this.temperature * 9) / 5 + 32;
+		const windInMph = WeatherUtils.convertWind(this.windSpeed, "imperial");
+		const tempInF = WeatherUtils.convertTemp(this.temperature, "imperial");
 		let feelsLike = tempInF;
 
 		if (windInMph > 3 && tempInF < 50) {

modules/default/weather/weatherutils.js

@@ -0,0 +1,98 @@
+/* MagicMirror²
+ * Weather Util Methods
+ *
+ * By Rejas
+ * MIT Licensed.
+ */
+const WeatherUtils = {
+	/**
+	 * Convert wind (from m/s) to beaufort scale
+	 *
+	 * @param {number} speedInMS the windspeed you want to convert
+	 * @returns {number} the speed in beaufort
+	 */
+	beaufortWindSpeed(speedInMS) {
+		const windInKmh = (speedInMS * 3600) / 1000;
+		const speeds = [1, 5, 11, 19, 28, 38, 49, 61, 74, 88, 102, 117, 1000];
+		for (const [index, speed] of speeds.entries()) {
+			if (speed > windInKmh) {
+				return index;
+			}
+		}
+		return 12;
+	},
+
+	/**
+	 * Convert temp (from degrees C) into imperial or metric unit depending on
+	 * your config
+	 *
+	 * @param {number} tempInC the temperature in celsius you want to convert
+	 * @param {string} unit can be 'imperial' or 'metric'
+	 * @returns {number} the converted temperature
+	 */
+	convertTemp(tempInC, unit) {
+		return unit === "imperial" ? tempInC * 1.8 + 32 : tempInC;
+	},
+
+	/**
+	 * Convert wind speed into another unit.
+	 *
+	 * @param {number} windInMS the windspeed in meter/sec you want to convert
+	 * @param {string} unit can be 'beaufort', 'kmh', 'knots, 'imperial' (mph)
+	 * or 'metric' (mps)
+	 * @returns {number} the converted windspeed
+	 */
+	convertWind(windInMS, unit) {
+		switch (unit) {
+			case "beaufort":
+				return this.beaufortWindSpeed(windInMS);
+			case "kmh":
+				return (windInMS * 3600) / 1000;
+			case "knots":
+				return windInMS * 1.943844;
+			case "imperial":
+				return windInMS * 2.2369362920544;
+			case "metric":
+			default:
+				return windInMS;
+		}
+	},
+
+	/*
+	 * Convert the wind direction cardinal to value
+	 */
+	convertWindDirection(windDirection) {
+		const windCardinals = {
+			N: 0,
+			NNE: 22,
+			NE: 45,
+			ENE: 67,
+			E: 90,
+			ESE: 112,
+			SE: 135,
+			SSE: 157,
+			S: 180,
+			SSW: 202,
+			SW: 225,
+			WSW: 247,
+			W: 270,
+			WNW: 292,
+			NW: 315,
+			NNW: 337
+		};
+
+		return windCardinals.hasOwnProperty(windDirection) ? windCardinals[windDirection] : null;
+	},
+
+	convertWindToMetric(mph) {
+		return mph / 2.2369362920544;
+	},
+
+	convertWindToMs(kmh) {
+		return kmh * 0.27777777777778;
+	}
+};
+
+if (typeof module !== "undefined") {
+	module.exports = WeatherUtils;
+}

tests/unit/functions/weather_object_spec.js

@@ -1,4 +1,5 @@
 const WeatherObject = require("../../../modules/default/weather/weatherobject.js");
+const WeatherUtils = require("../../../modules/default/weather/weatherutils.js");
 
 global.moment = require("moment-timezone");
 global.SunCalc = require("suncalc");
@@ -25,15 +26,21 @@ describe("WeatherObject", () => {
 		expect(weatherobject.isDayTime()).toBe(false);
 	});
 
+	afterAll(() => {
+		moment.tz.setDefault(originalTimeZone);
+	});
+});
+
+describe("WeatherObject", () => {
 	it("should convert windspeed correctly from mph to mps", () => {
-		expect(Math.round(weatherobject.convertWindToMetric(93.951324266285))).toBe(42);
+		expect(Math.round(WeatherUtils.convertWindToMetric(93.951324266285))).toBe(42);
 	});
 
-	it("should convert wind direction correctly from cardinal to value", () => {
-		expect(weatherobject.valueWindDirection("SSE")).toBe(157);
+	it("should convert windspeed correctly from kmh to mps", () => {
+		expect(Math.round(WeatherUtils.convertWindToMs(151.2))).toBe(42);
 	});
 
-	afterAll(() => {
-		moment.tz.setDefault(originalTimeZone);
+	it("should convert wind direction correctly from cardinal to value", () => {
+		expect(WeatherUtils.convertWindDirection("SSE")).toBe(157);
 	});
 });