101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
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/* globals navigation */
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import { locationCleanup } from './utils/string.mjs';
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import { elemForEach } from './utils/elem.mjs';
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// constants
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const degree = String.fromCharCode(176);
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// local variables
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let interval;
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let screenIndex = 0;
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// start drawing conditions
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// reset starts from the first item in the text scroll list
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const start = () => {
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// store see if the context is new
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// set up the interval if needed
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if (!interval) {
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interval = setInterval(incrementInterval, 4000);
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}
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// draw the data
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drawScreen();
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};
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const stop = (reset) => {
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if (interval) interval = clearInterval(interval);
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if (reset) screenIndex = 0;
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};
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// increment interval, roll over
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const incrementInterval = () => {
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screenIndex = (screenIndex + 1) % (screens.length);
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// draw new text
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drawScreen();
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};
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const drawScreen = async () => {
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// get the conditions
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const data = await navigation.getCurrentWeather();
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// nothing to do if there's no data yet
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if (!data) return;
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drawCondition(screens[screenIndex](data));
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};
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// the "screens" are stored in an array for easy addition and removal
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const screens = [
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// station name
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(data) => `Conditions at ${locationCleanup(data.station.properties.name).substr(0, 20)}`,
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// temperature
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(data) => {
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let text = `Temp: ${data.Temperature}${degree} ${data.TemperatureUnit}`;
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if (data.observations.heatIndex.value) {
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text += ` Heat Index: ${data.HeatIndex}${degree} ${data.TemperatureUnit}`;
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} else if (data.observations.windChill.value) {
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text += ` Wind Chill: ${data.WindChill}${degree} ${data.TemperatureUnit}`;
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}
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return text;
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},
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// humidity
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(data) => `Humidity: ${data.Humidity}${degree} ${data.TemperatureUnit} Dewpoint: ${data.DewPoint}${degree} ${data.TemperatureUnit}`,
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// barometric pressure
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(data) => `Barometric Pressure: ${data.Pressure} ${data.PressureDirection}`,
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// wind
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(data) => {
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let text = '';
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if (data.WindSpeed > 0) {
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text = `Wind: ${data.WindDirection} ${data.WindSpeed} ${data.WindUnit}`;
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} else {
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text = 'Wind: Calm';
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}
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if (data.WindGust > 0) {
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text += ` Gusts to ${data.WindGust}`;
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}
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return text;
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},
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// visibility
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(data) => `Visib: ${data.Visibility} ${data.VisibilityUnit} Ceiling: ${data.Ceiling === 0 ? 'Unlimited' : `${data.Ceiling} ${data.CeilingUnit}`}`,
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];
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// internal draw function with preset parameters
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const drawCondition = (text) => {
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// update all html scroll elements
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elemForEach('.weather-display .scroll .fixed', (elem) => {
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elem.innerHTML = text;
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});
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};
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// return the api
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export {
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start,
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stop,
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};
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