394 lines
12 KiB
JavaScript
394 lines
12 KiB
JavaScript
// regional forecast and observations
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// type 0 = observations, 1 = first forecast, 2 = second forecast
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import STATUS from './status.mjs';
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import { distance as calcDistance } from './utils/calc.mjs';
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import { json } from './utils/fetch.mjs';
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import { convert, UNITS, getUnits } from './utils/units.mjs';
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import { getWeatherRegionalIconFromIconLink } from './icons.mjs';
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import { preloadImg } from './utils/image.mjs';
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import { DateTime } from '../vendor/auto/luxon.mjs';
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import WeatherDisplay from './weatherdisplay.mjs';
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import { registerDisplay } from './navigation.mjs';
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class RegionalForecast extends WeatherDisplay {
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constructor(navId, elemId) {
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super(navId, elemId, 'Regional Forecast', true);
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// timings
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this.timing.totalScreens = 3;
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}
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async getData(_weatherParameters) {
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super.getData(_weatherParameters);
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const weatherParameters = _weatherParameters ?? this.weatherParameters;
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// pre-load the base map
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let baseMap = 'images/Basemap2.png';
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if (weatherParameters.state === 'HI') {
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baseMap = 'images/HawaiiRadarMap4.png';
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} else if (weatherParameters.state === 'AK') {
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baseMap = 'images/AlaskaRadarMap6.png';
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}
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this.elem.querySelector('.map img').src = baseMap;
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// map offset
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const offsetXY = {
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x: 240,
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y: 117,
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};
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// get user's location in x/y
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const sourceXY = RegionalForecast.getXYFromLatitudeLongitude(weatherParameters.latitude, weatherParameters.longitude, offsetXY.x, offsetXY.y, weatherParameters.state);
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// get latitude and longitude limits
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const minMaxLatLon = RegionalForecast.getMinMaxLatitudeLongitude(sourceXY.x, sourceXY.y, offsetXY.x, offsetXY.y, weatherParameters.state);
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// get a target distance
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let targetDistance = 2.5;
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if (weatherParameters.state === 'HI') targetDistance = 1;
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// make station info into an array
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const stationInfoArray = Object.values(StationInfo).map((value) => ({ ...value, targetDistance }));
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// combine regional cities with station info for additional stations
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// stations are intentionally after cities to allow cities priority when drawing the map
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const combinedCities = [...RegionalCities, ...stationInfoArray];
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// Determine which cities are within the max/min latitude/longitude.
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const regionalCities = [];
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combinedCities.forEach((city) => {
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if (city.lat > minMaxLatLon.minLat && city.lat < minMaxLatLon.maxLat
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&& city.lon > minMaxLatLon.minLon && city.lon < minMaxLatLon.maxLon - 1) {
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// default to 1 for cities loaded from RegionalCities, use value calculate above for remaining stations
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const targetDist = city.targetDistance || 1;
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// Only add the city as long as it isn't within set distance degree of any other city already in the array.
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const okToAddCity = regionalCities.reduce((acc, testCity) => {
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const distance = calcDistance(city.lon, city.lat, testCity.lon, testCity.lat);
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return acc && distance >= targetDist;
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}, true);
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if (okToAddCity) regionalCities.push(city);
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}
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});
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// get regional forecasts and observations (the two are intertwined due to the design of api.weather.gov)
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const regionalDataAll = await Promise.all(regionalCities.map(async (city) => {
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try {
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if (!city.point) throw new Error('No pre-loaded point');
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// start off the observation task
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const observationPromise = RegionalForecast.getRegionalObservation(city.point, city);
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const forecast = await json(`https://api.weather.gov/gridpoints/${city.point.wfo}/${city.point.x},${city.point.y}/forecast`);
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// get XY on map for city
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const cityXY = RegionalForecast.getXYForCity(city, minMaxLatLon.maxLat, minMaxLatLon.minLon, weatherParameters.state);
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// wait for the regional observation if it's not done yet
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const observation = await observationPromise;
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// format the observation the same as the forecast
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const regionalObservation = {
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daytime: !!observation.icon.match(/\/day\//),
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temperature: convert.celsiusToFahrenheit(observation.temperature.value),
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name: RegionalForecast.formatCity(city.city),
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icon: observation.icon,
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x: cityXY.x,
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y: cityXY.y,
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};
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// preload the icon
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preloadImg(getWeatherRegionalIconFromIconLink(regionalObservation.icon, !regionalObservation.daytime));
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// return a pared-down forecast
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// 0th object is the current conditions
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// first object is the next period i.e. if it's daytime then it's the "tonight" forecast
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// second object is the following period
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// always skip the first forecast index because it's what's going on right now
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return [
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regionalObservation,
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RegionalForecast.buildForecast(forecast.properties.periods[1], city, cityXY),
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RegionalForecast.buildForecast(forecast.properties.periods[2], city, cityXY),
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];
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} catch (e) {
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console.log(`No regional forecast data for '${city.name ?? city.city}'`);
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console.log(e);
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return false;
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}
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}));
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// filter out any false (unavailable data)
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const regionalData = regionalDataAll.filter((data) => data);
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// test for data present
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if (regionalData.length === 0) {
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this.setStatus(STATUS.noData);
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return;
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}
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// return the weather data and offsets
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this.data = {
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regionalData,
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offsetXY,
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sourceXY,
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};
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this.setStatus(STATUS.loaded);
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}
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static buildForecast(forecast, city, cityXY) {
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return {
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daytime: forecast.isDaytime,
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temperature: forecast.temperature || 0,
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name: RegionalForecast.formatCity(city.city),
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icon: forecast.icon,
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x: cityXY.x,
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y: cityXY.y,
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time: forecast.startTime,
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};
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}
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static async getRegionalObservation(point, city) {
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try {
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// get stations
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const stations = await json(`https://api.weather.gov/gridpoints/${city.point.wfo}/${city.point.x},${city.point.y}/stations`);
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// get the first station
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const station = stations.features[0].id;
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// get the observation data
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const observation = await json(`${station}/observations/latest`);
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// preload the image
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if (!observation.properties.icon) return false;
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preloadImg(getWeatherRegionalIconFromIconLink(observation.properties.icon, !observation.properties.daytime));
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// return the observation
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return observation.properties;
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} catch (e) {
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console.log(`Unable to get regional observations for ${city.Name ?? city.city}`);
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console.error(e.status, e.responseJSON);
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return false;
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}
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}
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// utility latitude/pixel conversions
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static getXYFromLatitudeLongitude(Latitude, Longitude, OffsetX, OffsetY, state) {
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if (state === 'AK') return RegionalForecast.getXYFromLatitudeLongitudeAK(Latitude, Longitude, OffsetX, OffsetY);
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if (state === 'HI') return RegionalForecast.getXYFromLatitudeLongitudeHI(Latitude, Longitude, OffsetX, OffsetY);
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let y = 0;
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let x = 0;
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const ImgHeight = 1600;
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const ImgWidth = 2550;
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y = (50.5 - Latitude) * 55.2;
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y -= OffsetY; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (y > (ImgHeight - (OffsetY * 2))) {
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y = ImgHeight - (OffsetY * 2);
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} else if (y < 0) {
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y = 0;
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}
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x = ((-127.5 - Longitude) * 41.775) * -1;
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x -= OffsetX; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (x > (ImgWidth - (OffsetX * 2))) {
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x = ImgWidth - (OffsetX * 2);
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} else if (x < 0) {
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x = 0;
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}
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return { x, y };
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}
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static getXYFromLatitudeLongitudeAK(Latitude, Longitude, OffsetX, OffsetY) {
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let y = 0;
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let x = 0;
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const ImgHeight = 1142;
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const ImgWidth = 1200;
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y = (73.0 - Latitude) * 56;
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y -= OffsetY; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (y > (ImgHeight - (OffsetY * 2))) {
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y = ImgHeight - (OffsetY * 2);
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} else if (y < 0) {
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y = 0;
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}
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x = ((-175.0 - Longitude) * 25.0) * -1;
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x -= OffsetX; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (x > (ImgWidth - (OffsetX * 2))) {
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x = ImgWidth - (OffsetX * 2);
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} else if (x < 0) {
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x = 0;
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}
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return { x, y };
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}
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static getXYFromLatitudeLongitudeHI(Latitude, Longitude, OffsetX, OffsetY) {
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let y = 0;
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let x = 0;
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const ImgHeight = 571;
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const ImgWidth = 600;
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y = (25 - Latitude) * 55.2;
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y -= OffsetY; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (y > (ImgHeight - (OffsetY * 2))) {
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y = ImgHeight - (OffsetY * 2);
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} else if (y < 0) {
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y = 0;
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}
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x = ((-164.5 - Longitude) * 41.775) * -1;
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x -= OffsetX; // Centers map.
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// Do not allow the map to exceed the max/min coordinates.
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if (x > (ImgWidth - (OffsetX * 2))) {
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x = ImgWidth - (OffsetX * 2);
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} else if (x < 0) {
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x = 0;
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}
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return { x, y };
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}
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static getMinMaxLatitudeLongitude(X, Y, OffsetX, OffsetY, state) {
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if (state === 'AK') return RegionalForecast.getMinMaxLatitudeLongitudeAK(X, Y, OffsetX, OffsetY);
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if (state === 'HI') return RegionalForecast.getMinMaxLatitudeLongitudeHI(X, Y, OffsetX, OffsetY);
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const maxLat = ((Y / 55.2) - 50.5) * -1;
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const minLat = (((Y + (OffsetY * 2)) / 55.2) - 50.5) * -1;
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const minLon = (((X * -1) / 41.775) + 127.5) * -1;
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const maxLon = ((((X + (OffsetX * 2)) * -1) / 41.775) + 127.5) * -1;
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return {
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minLat, maxLat, minLon, maxLon,
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};
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}
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static getMinMaxLatitudeLongitudeAK(X, Y, OffsetX, OffsetY) {
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const maxLat = ((Y / 56) - 73.0) * -1;
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const minLat = (((Y + (OffsetY * 2)) / 56) - 73.0) * -1;
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const minLon = (((X * -1) / 25) + 175.0) * -1;
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const maxLon = ((((X + (OffsetX * 2)) * -1) / 25) + 175.0) * -1;
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return {
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minLat, maxLat, minLon, maxLon,
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};
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}
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static getMinMaxLatitudeLongitudeHI(X, Y, OffsetX, OffsetY) {
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const maxLat = ((Y / 55.2) - 25) * -1;
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const minLat = (((Y + (OffsetY * 2)) / 55.2) - 25) * -1;
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const minLon = (((X * -1) / 41.775) + 164.5) * -1;
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const maxLon = ((((X + (OffsetX * 2)) * -1) / 41.775) + 164.5) * -1;
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return {
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minLat, maxLat, minLon, maxLon,
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};
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}
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static getXYForCity(City, MaxLatitude, MinLongitude, state) {
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if (state === 'AK') RegionalForecast.getXYForCityAK(City, MaxLatitude, MinLongitude);
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if (state === 'HI') RegionalForecast.getXYForCityHI(City, MaxLatitude, MinLongitude);
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let x = (City.lon - MinLongitude) * 57;
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let y = (MaxLatitude - City.lat) * 70;
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if (y < 30) y = 30;
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if (y > 282) y = 282;
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if (x < 40) x = 40;
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if (x > 580) x = 580;
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return { x, y };
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}
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static getXYForCityAK(City, MaxLatitude, MinLongitude) {
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let x = (City.lon - MinLongitude) * 37;
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let y = (MaxLatitude - City.lat) * 70;
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if (y < 30) y = 30;
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if (y > 282) y = 282;
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if (x < 40) x = 40;
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if (x > 580) x = 580;
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return { x, y };
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}
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static getXYForCityHI(City, MaxLatitude, MinLongitude) {
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let x = (City.lon - MinLongitude) * 57;
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let y = (MaxLatitude - City.lat) * 70;
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if (y < 30) y = 30;
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if (y > 282) y = 282;
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if (x < 40) x = 40;
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if (x > 580) x = 580;
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return { x, y };
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}
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// to fit on the map, remove anything after punctuation and then limit to 15 characters
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static formatCity(city) {
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return city.match(/[^-;/\\,]*/)[0].substr(0, 12);
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}
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drawCanvas() {
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super.drawCanvas();
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// break up data into useful values
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const { regionalData: data, sourceXY, offsetXY } = this.data;
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// draw the header graphics
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// draw the appropriate title
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const titleTop = this.elem.querySelector('.title.dual .top');
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const titleBottom = this.elem.querySelector('.title.dual .bottom');
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if (this.screenIndex === 0) {
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titleTop.innerHTML = 'Regional';
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titleBottom.innerHTML = 'Observations';
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} else {
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const forecastDate = DateTime.fromISO(data[0][this.screenIndex].time);
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// get the name of the day
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const dayName = forecastDate.toLocaleString({ weekday: 'long' });
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titleTop.innerHTML = 'Forecast for';
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// draw the title
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if (data[0][this.screenIndex].daytime) {
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titleBottom.innerHTML = dayName;
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} else {
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titleBottom.innerHTML = `${dayName} Night`;
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}
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}
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// draw the map
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const scale = 640 / (offsetXY.x * 2);
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const map = this.elem.querySelector('.map');
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map.style.zoom = scale;
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map.style.top = `-${sourceXY.y}px`;
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map.style.left = `-${sourceXY.x}px`;
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const cities = data.map((city) => {
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const fill = {};
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const period = city[this.screenIndex];
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fill.icon = { type: 'img', src: getWeatherRegionalIconFromIconLink(period.icon, !period.daytime) };
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fill.city = period.name;
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let { temperature } = period;
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if (getUnits() === UNITS.metric) temperature = Math.round(convert.fahrenheitToCelsius(temperature));
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fill.temp = temperature;
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const elem = this.fillTemplate('location', fill);
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elem.style.left = `${period.x}px`;
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elem.style.top = `${period.y}px`;
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return elem;
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});
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const locationContainer = this.elem.querySelector('.location-container');
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locationContainer.innerHTML = '';
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locationContainer.append(...cities);
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this.finishDraw();
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}
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}
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// register display
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registerDisplay(new RegionalForecast(4, 'regional-forecast'));
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