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meteo_milano_palermo.html
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<!DOCTYPE html>
<html lang="it">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Previsioni Meteo</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
background: #f0f0f0;
color: #333;
}
.container {
max-width: 100%;
padding: 20px;
box-sizing: border-box;
}
h1 {
text-align: center;
}
.forecast {
display: flex;
align-items: center;
justify-content: space-between;
padding: 10px;
border-bottom: 1px solid #ddd;
}
.forecast:last-child {
border-bottom: none;
}
.forecast .info {
flex: 1;
text-align: center;
}
.forecast img {
width: 50px;
height: 50px;
}
.forecast .weather-info {
display: flex;
align-items: center;
}
.forecast .weather-info div {
margin-right: 10px;
}
.low-rain {
background-color: #b4f0a7;
}
.medium-low-rain {
background-color: #dff0a7;
}
.medium-rain {
background-color: #f0e3a7;
}
.high-rain {
background-color: #f0b0a7;
}
.very-high-rain {
background-color: #f07a7a;
}
.hidden {
display: none;
}
.select-city {
text-align: center;
margin-bottom: 20px;
}
.select-city select {
width: 100%;
padding: 10px;
font-size: 16px;
border: 1px solid #ddd;
border-radius: 5px;
}
.select-city button {
margin-top: 10px;
padding: 10px 20px;
font-size: 16px;
background-color: #007bff;
color: #fff;
border: none;
border-radius: 5px;
cursor: pointer;
}
.error {
color: red;
text-align: center;
margin-bottom: 20px;
}
@media screen and (max-width: 500px) {
.forecast {
flex-direction: column;
align-items: flex-start;
}
.forecast .weather-info {
margin-top: 10px;
justify-content: flex-start;
}
.forecast .info {
text-align: left;
}
.forecast img {
margin-right: 0;
}
.weather-info {
display: inline!important;
float: left;
width: 50%;
text-align: center;
}
.info {
display: inline;
float: left;
width: 50%;
}
.forecast {
display: flow-root;
}
}
</style>
</head>
<body>
<div class="container">
<h1>Previsioni Meteo</h1>
<div id="select-city" class="select-city">
<label for="city">Meteo per quale città?</label>
<select id="city">
<option value="Milano">Milano</option>
<option value="Palermo">Palermo</option>
</select>
<button onclick="fetchWeather()">Mostra Meteo</button>
</div>
<div id="error-message" class="error hidden"></div>
<div id="forecast-container" class="hidden"></div>
</div>
<script>
// Qui va inserità l'api key di open weather map
const apiKey = 'INSERISCI_API_KEY';
async function fetchWeatherData(city) {
try {
const url = `http://api.openweathermap.org/data/2.5/forecast?q=${city},IT&appid=${apiKey}&units=metric`;
const response = await fetch(url);
if (!response.ok) {
const errorDetail = await response.json();
throw new Error(`HTTP error! Status: ${response.status} (${response.statusText}) - ${errorDetail.message}`);
}
const data = await response.json();
if (data.cod !== "200") {
throw new Error(`API error! Message: ${data.message}`);
}
return data;
} catch (error) {
showError(error.message);
throw error;
}
}
function interpolateForecasts(currentForecast, nextForecast, ratio) {
const temp = currentForecast.main.temp + (nextForecast.main.temp - currentForecast.main.temp) * ratio;
const rainProb = currentForecast.pop * 100 + (nextForecast.pop * 100 - currentForecast.pop * 100) * ratio;
return { temp, rainProb };
}
function getRainClass(rainProb) {
if (rainProb >= 70) return 'very-high-rain';
if (rainProb >= 50) return 'high-rain';
if (rainProb >= 40) return 'medium-rain';
if (rainProb >= 20) return 'medium-low-rain';
return 'low-rain';
}
function displayWeatherForecast(city, forecasts) {
const forecastContainer = document.getElementById('forecast-container');
forecastContainer.innerHTML = `<h2>Previsioni meteo per ${city}</h2>`;
forecastContainer.classList.remove('hidden');
for (let i = 0; i < forecasts.length - 1; i++) {
const currentForecast = forecasts[i];
const nextForecast = forecasts[i + 1];
const currentTime = new Date(currentForecast.dt * 1000);
const nextTime = new Date(nextForecast.dt * 1000);
const timeDiff = (nextTime - currentTime) / (1000 * 3600); // Differenza in ore
for (let j = 0; j < timeDiff; j++) {
const forecastTime = new Date(currentTime.getTime() + j * 3600 * 1000);
const ratio = j / timeDiff;
const { temp, rainProb } = interpolateForecasts(currentForecast, nextForecast, ratio);
const weather = currentForecast.weather[0];
const iconUrl = `http://openweathermap.org/img/wn/${weather.icon}@2x.png`;
const rainClass = getRainClass(rainProb);
const forecastDiv = document.createElement('div');
forecastDiv.className = `forecast ${rainClass}`;
forecastDiv.innerHTML = `
<div class="info">
<div>${forecastTime.getHours()}:00</div>
<div>Temp: ${temp.toFixed(2)}°C</div>
<div>Pioggia: ${rainProb.toFixed(2)}%</div>
<div>Condizioni: ${weather.description}</div>
</div>
<div class="weather-info">
<img src="${iconUrl}" alt="${weather.description}">
</div>
`;
forecastContainer.appendChild(forecastDiv);
}
}
}
function showError(message) {
const errorMessage = document.getElementById('error-message');
errorMessage.textContent = message;
errorMessage.classList.remove('hidden');
}
function clearError() {
const errorMessage = document.getElementById('error-message');
errorMessage.textContent = '';
errorMessage.classList.add('hidden');
}
async function fetchWeather() {
clearError();
const citySelect = document.getElementById('city');
const city = citySelect.value;
try {
const data = await fetchWeatherData(city);
const startOfDay = new Date();
startOfDay.setHours(0, 0, 0, 0);
const endOfDay = new Date(startOfDay);
endOfDay.setDate(endOfDay.getDate() + 1);
const todayForecasts = data.list.filter(entry => {
const forecastDate = new Date(entry.dt * 1000);
return forecastDate >= startOfDay && forecastDate < endOfDay;
});
displayWeatherForecast(city, todayForecasts);
} catch (error) {
console.error(error);
}
}
</script>
</body>
</html>