// This approach will fetch weather data from a Wunderground API, parse the JSON response, // and display a simplified version of the current conditions in separate tiles. We'll use // the fetch API to make the HTTP request and React for rendering the UI. /** @jsxImportSource https://esm.sh/react */ import React, { useEffect, useState } from "https://esm.sh/react"; import { createRoot } from "https://esm.sh/react-dom/client"; function calculateDensityAltitude(elevation, temperature, pressure) { // Convert temperature to Celsius const tempC = (temperature - 32) * 5 / 9; // Convert pressure from inHg to hPa const pressureHpa = pressure * 33.86389; // Calculate density altitude const densityAltitude = elevation + (145366.45 * (1 - Math.pow(pressureHpa / 1013.25, 0.190284))); return Math.round(densityAltitude); } function App() { const [weatherData, setWeatherData] = useState(null); const [error, setError] = useState(null); const [lastChecked, setLastChecked] = useState(new Date()); const [consecutiveErrors, setConsecutiveErrors] = useState(0); useEffect(() => { const fetchWeather = () => { setLastChecked(new Date()); fetch("/api/weather" + window.location.search) .then(response => response.json()) .then(data => { setWeatherData(data); setConsecutiveErrors(0); }) .catch(err => { setError(err.message); setConsecutiveErrors(prev => prev + 1); }); }; fetchWeather(); // Fetch immediately on load const intervalId = setInterval(() => { if (consecutiveErrors < 5) { fetchWeather(); } else { setError("Too many errors occurred. Updates paused. Please refresh the page to try again."); } }, 60000); // 60000 ms = 1 minute // Clean up the interval on component unmount return () => clearInterval(intervalId); }, [consecutiveErrors]); if (error) return

Error: {error}

; if (!weatherData) return

; const densityAltitude = calculateDensityAltitude( weatherData.elevation, weatherData.temperature, weatherData.pressure, ); return (

Current Weather - {weatherData.stationName}

Conditions

Temperature: {weatherData.temperature} °F Humidity: {weatherData.humidity} % Dewpoint: {weatherData.dewpoint} °F Pressure: {weatherData.pressure} inHg

Wind

Wind Speed: {weatherData.windSpeed} mph Direction: {weatherData.windDirection} ° Wind Gust: {weatherData.windGust} mph

Rain

Daily: {weatherData.rainDaily} in Month: {weatherData.rainMonthly} in Rainfall Rate: {weatherData.rainRate} in/hr

Altitude

Station Elevation: {weatherData.elevation.toLocaleString()} ft Density Altitude: {densityAltitude.toLocaleString()} ft

Last Updated: {weatherData.observationTime}

Last Checked: {lastChecked.toLocaleString()}

View Source

); } function client() { createRoot(document.getElementById("root")).render(); } if (typeof document !== "undefined") { client(); } async function server(request: Request): Promise { const url = new URL(request.url); const stationId = url.searchParams.get("stationId"); if (!stationId) { return new Response( ` Weather Station ID Required

Weather Station ID Required

Please provide a Weather Underground station ID in the URL.

Example: ${url.origin}/?stationId=KCASANFR49

You can find station IDs on the Weather Underground WunderMap.

`, { headers: { "Content-Type": "text/html" }, }, ); } if (url.pathname === "/api/weather") { try { const wundergroundResponse = await fetch( `https://api.weather.com/v2/pws/observations/current?stationId=${stationId}&format=json&units=e&apiKey=e1f10a1e78da46f5b10a1e78da96f525`, ); const wundergroundData = await wundergroundResponse.json(); if (!wundergroundData.observations || wundergroundData.observations.length === 0) throw new Error("No data available for this station"); const simplifiedData = { temperature: wundergroundData.observations[0].imperial.temp, humidity: wundergroundData.observations[0].humidity, dewpoint: wundergroundData.observations[0].imperial.dewpt, windSpeed: wundergroundData.observations[0].imperial.windSpeed, windDirection: wundergroundData.observations[0].winddir, windGust: wundergroundData.observations[0].imperial.windGust, rainDaily: wundergroundData.observations[0].imperial.precipTotal, rainMonthly: wundergroundData.observations[0].imperial.precipTotal, rainRate: wundergroundData.observations[0].imperial.precipRate, pressure: wundergroundData.observations[0].imperial.pressure, elevation: wundergroundData.observations[0].imperial.elev, observationTime: new Date(wundergroundData.observations[0].obsTimeLocal).toLocaleString(), stationId: stationId, stationName: wundergroundData.observations[0].neighborhood || stationId, }; return new Response(JSON.stringify(simplifiedData), { headers: { "Content-Type": "application/json" }, }); } catch (error) { return new Response(JSON.stringify({ error: "Failed to fetch weather data" }), { status: 400, headers: { "Content-Type": "application/json" }, }); } } return new Response( ` Weather Display

`, { headers: { "content-type": "text/html", }, }, ); } const css = ` body { font-family: Arial, sans-serif; display: flex; justify-content: center; align-items: center; min-height: 100vh; margin: 0; background-color: #333333; } .weather-display { background-color: white; padding: 20px; border-radius: 10px; box-shadow: 0 0 10px rgba(0,0,0,0.1); text-align: center; background-color: #444444; } .weather-tiles { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; margin-top: 20px; } .tile { background-color: #f8f8f8; border-radius: 8px; padding: 15px; width: 220px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); } .tile h2 { margin-top: 0; margin-bottom: 10px; font-size: 1.2em; color: #333; } .tile-content { display: grid; grid-template-columns: 2fr 1fr auto; gap: 5px; } .tile-content span:nth-child(3n+1) { text-align: left; } .tile-content span:nth-child(3n+2) { text-align: right; } .tile-content span:nth-child(3n) { text-align: left; padding-left: 2px; } h1 { color: #333; font-size: 1.5em; color: #f0f0f0; } .error { color: red; font-weight: bold; text-align: center; } p { margin: 10px 0; } .update-time, .check-time { margin-top: 10px; font-style: italic; color: #f0f0f0; } `; export default server;

Croniac