227 lines
9.4 KiB
JavaScript
227 lines
9.4 KiB
JavaScript
// current weather conditions display
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/* globals WeatherDisplay, utils, STATUS, icons, UNITS, draw, navigation */
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// eslint-disable-next-line no-unused-vars
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class CurrentWeather extends WeatherDisplay {
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constructor(navId,elemId) {
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super(navId,elemId,'Current Conditions');
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// pre-load background image (returns promise)
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this.backgroundImage = utils.image.load('images/BackGround1_1.png');
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}
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async getData(weatherParameters) {
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super.getData(weatherParameters);
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if (!weatherParameters) weatherParameters = this.weatherParameters;
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// Load the observations
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let observations, station;
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// station number counter
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let stationNum = 0;
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while (!observations && stationNum < weatherParameters.stations.length) {
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// get the station
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station = weatherParameters.stations[stationNum];
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stationNum++;
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try {
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// station observations
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observations = await utils.fetch.json(`${station.id}/observations`,{
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cors: true,
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data: {
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limit: 2,
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},
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});
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// test data quality
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if (observations.features[0].properties.temperature.value === null ||
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observations.features[0].properties.windSpeed.value === null ||
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observations.features[0].properties.textDescription === null) {
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observations = undefined;
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throw new Error(`Unable to get observations: ${station.properties.stationIdentifier}, trying next station`);
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}
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// TODO: add retry for further stations if observations are unavailable
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} catch (e) {
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console.error(e);
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}
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}
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// test for data received
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if (!observations) {
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console.error('All current weather stations exhausted');
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this.setStatus(STATUS.failed);
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return;
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}
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// preload the icon
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utils.image.preload(icons.getWeatherIconFromIconLink(observations.features[0].properties.icon));
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// we only get here if there was no error above
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this.data = Object.assign({}, observations, {station: station});
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this.setStatus(STATUS.loaded);
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}
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// format the data for use outside this function
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parseData() {
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if (!this.data) return false;
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const data = {};
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const observations = this.data.features[0].properties;
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// values from api are provided in metric
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data.observations = observations;
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data.Temperature = Math.round(observations.temperature.value);
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data.TemperatureUnit = 'C';
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data.DewPoint = Math.round(observations.dewpoint.value);
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data.Ceiling = Math.round(observations.cloudLayers[0].base.value);
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data.CeilingUnit = 'm.';
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data.Visibility = Math.round(observations.visibility.value/1000);
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data.VisibilityUnit = ' km.';
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data.WindSpeed = Math.round(observations.windSpeed.value);
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data.WindDirection = utils.calc.directionToNSEW(observations.windDirection.value);
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data.Pressure = Math.round(observations.barometricPressure.value);
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data.HeatIndex = Math.round(observations.heatIndex.value);
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data.WindChill = Math.round(observations.windChill.value);
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data.WindGust = Math.round(observations.windGust.value);
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data.WindUnit = 'KPH';
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data.Humidity = Math.round(observations.relativeHumidity.value);
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data.Icon = icons.getWeatherIconFromIconLink(observations.icon);
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data.PressureDirection = '';
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data.TextConditions = observations.textDescription;
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data.station = this.data.station;
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// difference since last measurement (pascals, looking for difference of more than 150)
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const pressureDiff = (observations.barometricPressure.value - this.data.features[1].properties.barometricPressure.value);
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if (pressureDiff > 150) data.PressureDirection = 'R';
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if (pressureDiff < -150) data.PressureDirection = 'F';
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if (navigation.units() === UNITS.english) {
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data.Temperature = utils.units.celsiusToFahrenheit(data.Temperature);
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data.TemperatureUnit = 'F';
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data.DewPoint = utils.units.celsiusToFahrenheit(data.DewPoint);
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data.Ceiling = Math.round(utils.units.metersToFeet(data.Ceiling)/100)*100;
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data.CeilingUnit = 'ft.';
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data.Visibility = utils.units.kilometersToMiles(observations.visibility.value/1000);
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data.VisibilityUnit = ' mi.';
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data.WindSpeed = utils.units.kphToMph(data.WindSpeed);
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data.WindUnit = 'MPH';
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data.Pressure = utils.units.pascalToInHg(data.Pressure).toFixed(2);
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data.HeatIndex = utils.units.celsiusToFahrenheit(data.HeatIndex);
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data.WindChill = utils.units.celsiusToFahrenheit(data.WindChill);
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data.WindGust = utils.units.kphToMph(data.WindGust);
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}
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return data;
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}
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async drawCanvas () {
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super.drawCanvas();
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// parse each time to deal with a change in units if necessary
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const data = this.parseData();
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this.context.drawImage(await this.backgroundImage, 0, 0);
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draw.horizontalGradientSingle(this.context, 0, 30, 500, 90, draw.topColor1, draw.topColor2);
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draw.triangle(this.context, 'rgb(28, 10, 87)', 500, 30, 450, 90, 500, 90);
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draw.horizontalGradientSingle(this.context, 0, 90, 52, 399, draw.sideColor1, draw.sideColor2);
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draw.horizontalGradientSingle(this.context, 584, 90, 640, 399, draw.sideColor1, draw.sideColor2);
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draw.titleText(this.context, 'Current', 'Conditions');
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draw.text(this.context, 'Star4000 Large', '24pt', '#FFFFFF', 170, 135, data.Temperature + String.fromCharCode(176), 2);
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let Conditions = data.observations.textDescription;
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if (Conditions.length > 15) {
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Conditions = this.shortConditions(Conditions);
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}
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draw.text(this.context, 'Star4000 Extended', '24pt', '#FFFFFF', 195, 170, Conditions, 2, 'center');
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draw.text(this.context, 'Star4000 Extended', '24pt', '#FFFFFF', 80, 330, 'Wind:', 2);
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draw.text(this.context, 'Star4000 Extended', '24pt', '#FFFFFF', 300, 330, data.WindDirection + ' ' + data.WindSpeed, 2, 'right');
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if (data.WindGust) draw.text(this.context, 'Star4000 Extended', '24pt', '#FFFFFF', 80, 375, 'Gusts to ' + data.WindGust, 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFF00', 315, 120, this.data.station.properties.name.substr(0, 20), 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 165, 'Humidity:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 165, data.Humidity + '%', 2, 'right');
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 205, 'Dewpoint:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 205, data.DewPoint + String.fromCharCode(176), 2, 'right');
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 245, 'Ceiling:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 245, (data.Ceiling === '' ? 'Unlimited' : data.Ceiling + data.CeilingUnit), 2, 'right');
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 285, 'Visibility:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 285, data.Visibility + data.VisibilityUnit, 2, 'right');
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 325, 'Pressure:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 535, 325, data.Pressure, 2, 'right');
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switch (data.PressureDirection) {
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case 'R':
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// Shadow
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draw.triangle(this.context, '#000000', 552, 302, 542, 312, 562, 312);
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draw.box(this.context, '#000000', 549, 312, 6, 15);
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// Border
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draw.triangle(this.context, '#000000', 550, 300, 540, 310, 560, 310);
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draw.box(this.context, '#000000', 547, 310, 6, 15);
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// Fill
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draw.triangle(this.context, '#FFFF00', 550, 301, 541, 309, 559, 309);
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draw.box(this.context, '#FFFF00', 548, 309, 4, 15);
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break;
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case 'F':
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// Shadow
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draw.triangle(this.context, '#000000', 552, 327, 542, 317, 562, 317);
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draw.box(this.context, '#000000', 549, 302, 6, 15);
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// Border
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draw.triangle(this.context, '#000000', 550, 325, 540, 315, 560, 315);
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draw.box(this.context, '#000000', 547, 300, 6, 15);
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// Fill
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draw.triangle(this.context, '#FFFF00', 550, 324, 541, 314, 559, 314);
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draw.box(this.context, '#FFFF00', 548, 301, 4, 15);
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break;
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default:
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}
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if (data.observations.heatIndex.value && data.HeatIndex !== data.Temperature) {
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 365, 'Heat Index:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 365, data.HeatIndex + String.fromCharCode(176), 2, 'right');
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} else if (data.observations.windChill.value && data.WindChill !== '' && data.WindChill < data.Temperature) {
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 340, 365, 'Wind Chill:', 2);
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draw.text(this.context, 'Star4000 Large', 'bold 16pt', '#FFFFFF', 560, 365, data.WindChill + String.fromCharCode(176), 2, 'right');
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}
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// get main icon
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this.gifs.push(await utils.image.superGifAsync({
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src: data.Icon,
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auto_play: true,
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canvas: this.canvas,
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x: 140,
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y: 175,
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max_width: 126,
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}));
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this.finishDraw();
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}
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// return the latest gathered information if available
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getCurrentWeather() {
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return this.parseData();
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}
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shortConditions(condition) {
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condition = condition.replace(/Light/g, 'L');
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condition = condition.replace(/Heavy/g, 'H');
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condition = condition.replace(/Partly/g, 'P');
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condition = condition.replace(/Mostly/g, 'M');
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condition = condition.replace(/Few/g, 'F');
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condition = condition.replace(/Thunderstorm/g, 'T\'storm');
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condition = condition.replace(/ in /g, '');
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condition = condition.replace(/Vicinity/g, '');
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condition = condition.replace(/ and /g, ' ');
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condition = condition.replace(/Freezing Rain/g, 'Frz Rn');
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condition = condition.replace(/Freezing/g, 'Frz');
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condition = condition.replace(/Unknown Precip/g, '');
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condition = condition.replace(/L Snow Fog/g, 'L Snw/Fog');
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condition = condition.replace(/ with /g, '/');
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return condition;
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}
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} |