leviv.github.io/sun.html at master · leviv/leviv.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Daylight</title>
    <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🌅</text></svg>">
    <style>
      body {
        margin: 0;
        padding: 20px;
        min-height: 100vh;
        transition: background 2s ease;
        font-family: Arial, sans-serif;
        color: white;
      }

      #sunTimes {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        text-align: center;
        font-family: sans-serif;
        font-size: 48px;
        font-weight: 300;
        line-height: 1.5;
      }

      #sunTimes .time-label {
        font-size: 24px;
        opacity: 0.8;
        font-weight: 400;
      }
    </style>
  </head>
  <body>
    <button onclick="getLocation()">Fetch Data</button>

    <div id="sunTimes">
      <div><span class="time-label">Sunrise</span></div>
      <div id="sunriseDisplay">--:--</div>
      <div><span class="time-label">Sunset</span></div>
      <div id="sunsetDisplay">--:--</div>
    </div>

    <p>Latitude: <span id="latitude"></span></p>
    <p>Longitude: <span id="longitude"></span></p>

    <p>Date: <span id="date"></span></p>
    <p>Sunrise: <span id="sunrise"></span></p>
    <p>Sunset: <span id="sunset"></span></p>
    <p>Daylight change: <span id="daylightChange"></span></p>

    <p>Notifications: <span id="notificationStatus"></span></p>
    <p id="scheduledNotifications"></p>
  </body>

  <script>
    const latitudeElement = document.getElementById('latitude');
    const longitudeElement = document.getElementById('longitude');
    const dateElement = document.getElementById('date');
    const sunriseElement = document.getElementById('sunrise');
    const sunsetElement = document.getElementById('sunset');
    const sunriseDisplayElement = document.getElementById('sunriseDisplay');
    const sunsetDisplayElement = document.getElementById('sunsetDisplay');
    const daylightChangeElement = document.getElementById('daylightChange');
    const notificationStatusElement = document.getElementById('notificationStatus');
    const scheduledNotificationsElement = document.getElementById('scheduledNotifications');

    let latitude = 0;
    let longitude = 0;

    /**
     * Format ISO time string to 12-hour format
     */
    function formatTo12Hour(isoString) {
      const date = new Date(isoString);
      let hours = date.getHours();
      const minutes = date.getMinutes();
      const ampm = hours >= 12 ? 'PM' : 'AM';

      hours = hours % 12;
      hours = hours ? hours : 12; // 0 should be 12
      const minutesStr = minutes < 10 ? '0' + minutes : minutes;

      return `${hours}:${minutesStr} ${ampm}`;
    }

    /**
     * Request notification permission from the user.
     */
    async function requestNotificationPermission() {
      if (!("Notification" in window)) {
        notificationStatusElement.innerHTML = "This browser does not support notifications";
        return false;
      }

      if (Notification.permission === "granted") {
        notificationStatusElement.innerHTML = "Notifications enabled ✓";
        return true;
      }

      if (Notification.permission === "denied") {
        notificationStatusElement.innerHTML = "Notifications blocked (check browser settings)";
        return false;
      }

      // Permission is "default" - need to request
      try {
        const permission = await Notification.requestPermission();
        if (permission === "granted") {
          notificationStatusElement.innerHTML = "Notifications enabled ✓";
          return true;
        } else if (permission === "denied") {
          notificationStatusElement.innerHTML = "Notifications blocked";
          return false;
        } else {
          // User dismissed the prompt
          notificationStatusElement.innerHTML = "Notification permission needed (click Fetch Data again)";
          return false;
        }
      } catch (error) {
        notificationStatusElement.innerHTML = "Could not request notification permission";
        return false;
      }
    }

    /**
     * Schedule a notification at a specific time with an optional callback.
     */
    function scheduleNotification(title, body, targetTime, onFire) {
      const now = new Date();
      const delay = targetTime - now;

      if (delay > 0) {
        setTimeout(() => {
          new Notification(title, { body });
          if (onFire) {
            onFire();
          }
        }, delay);
        return delay;
      }
      return null;
    }

    /**
     * Format milliseconds into a human-readable time string.
     */
    function formatTimeDifference(ms) {
      const totalSeconds = Math.abs(Math.floor(ms / 1000));
      const minutes = Math.floor(totalSeconds / 60);
      const seconds = totalSeconds % 60;

      if (minutes > 0 && seconds > 0) {
        return `${minutes} minute${minutes !== 1 ? 's' : ''} and ${seconds} second${seconds !== 1 ? 's' : ''}`;
      } else if (minutes > 0) {
        return `${minutes} minute${minutes !== 1 ? 's' : ''}`;
      } else {
        return `${seconds} second${seconds !== 1 ? 's' : ''}`;
      }
    }

    // Color palette for the sky gradient
    const skyColors = [
      '#1F214D', // Deep night
      '#50366F', // Purple night
      '#BF3475', // Pink dawn
      '#EE6C45', // Orange sunrise
      '#FFCE61', // Golden day
      '#FFE58A'  // Bright noon
    ];

    /**
     * Convert hex color to RGB object
     */
    function hexToRgb(hex) {
      const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
      return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
      } : null;
    }

    /**
     * Interpolate between two RGB colors
     */
    function interpolateColor(color1, color2, factor) {
      const c1 = hexToRgb(color1);
      const c2 = hexToRgb(color2);

      const r = Math.round(c1.r + factor * (c2.r - c1.r));
      const g = Math.round(c1.g + factor * (c2.g - c1.g));
      const b = Math.round(c1.b + factor * (c2.b - c1.b));

      return `rgb(${r}, ${g}, ${b})`;
    }

    /**
     * Get color based on time of day relative to sunrise/sunset
     */
    function getColorForTime(currentTime, sunriseTime, sunsetTime) {
      const sunrise = new Date(sunriseTime);
      const sunset = new Date(sunsetTime);
      const now = currentTime;

      // Calculate key times
      const solarNoon = new Date((sunrise.getTime() + sunset.getTime()) / 2);

      // Calculate previous sunset and next sunrise for night calculations
      const prevSunset = new Date(sunset);
      prevSunset.setDate(prevSunset.getDate() - 1);
      const nextSunrise = new Date(sunrise);
      nextSunrise.setDate(nextSunrise.getDate() + 1);

      let progress;

      if (now >= sunrise && now <= sunset) {
        // Daytime: from sunrise to sunset
        const dayLength = sunset - sunrise;
        const timeSinceSunrise = now - sunrise;
        progress = timeSinceSunrise / dayLength;

        // Map progress (0 to 1) to color indices (0 to 5 and back to 0)
        // 0 at sunrise, 5 at solar noon, 0 at sunset
        let colorProgress;
        if (progress <= 0.5) {
          // Morning: sunrise to noon (colors 0 to 5)
          colorProgress = progress * 2 * (skyColors.length - 1);
        } else {
          // Afternoon: noon to sunset (colors 5 to 0)
          colorProgress = (2 - progress * 2) * (skyColors.length - 1);
        }

        return colorProgress;
      } else {
        // Nighttime: stay at darkest color
        return 0;
      }
    }

    /**
     * Update the background gradient based on current time
     */
    function updateBackgroundGradient(sunriseTime, sunsetTime) {
      const now = new Date();
      const colorProgress = getColorForTime(now, sunriseTime, sunsetTime);

      // Get the two colors to interpolate between
      const colorIndex = Math.floor(colorProgress);
      const nextColorIndex = Math.min(colorIndex + 1, skyColors.length - 1);
      const factor = colorProgress - colorIndex;

      // Get base color
      const baseColor = interpolateColor(skyColors[colorIndex], skyColors[nextColorIndex], factor);

      // Create gradient effect: more blue at top, more yellow at bottom
      // Shift top color toward earlier (bluer) and bottom toward later (yellower)
      const topColorIndex = Math.max(0, colorIndex - 0.5);
      const bottomColorIndex = Math.min(skyColors.length - 1, colorIndex + 1);

      const topIndex = Math.floor(topColorIndex);
      const topNextIndex = Math.min(topIndex + 1, skyColors.length - 1);
      const topFactor = topColorIndex - topIndex;
      const topColor = interpolateColor(skyColors[topIndex], skyColors[topNextIndex], topFactor);

      const bottomIndex = Math.floor(bottomColorIndex);
      const bottomNextIndex = Math.min(bottomIndex + 1, skyColors.length - 1);
      const bottomFactor = bottomColorIndex - bottomIndex;
      const bottomColor = interpolateColor(skyColors[bottomIndex], skyColors[bottomNextIndex], bottomFactor);

      // Apply gradient
      document.body.style.background = `linear-gradient(to bottom, ${topColor}, ${bottomColor})`;
    }

    /**
     * Fetch sun data and schedule notifications for daylight changes.
     */
    async function fetchAndScheduleNotifications() {
      if (!latitude || !longitude) {
        console.error('Location not set');
        return;
      }

      // Get today's sunset times
      let date = new Date();
      const [sunriseToday, sunsetToday] = await fetchSunData(date);
      sunriseElement.innerHTML = sunriseToday;
      sunsetElement.innerHTML = sunsetToday;
      sunriseDisplayElement.innerHTML = formatTo12Hour(sunriseToday);
      sunsetDisplayElement.innerHTML = formatTo12Hour(sunsetToday);
      const daylightToday = new Date(sunsetToday) - new Date(sunriseToday);

      // Start updating the background gradient
      updateBackgroundGradient(sunriseToday, sunsetToday);

      // Fetch sunrise data from yesterday
      date.setDate(date.getDate() - 1);
      const [sunriseYesterday, sunsetYesterday] = await fetchSunData(date);
      const daylightYesterday = new Date(sunsetYesterday) - new Date(sunriseYesterday);

      // Calculate daylight change
      const daylightChange = daylightToday - daylightYesterday;
      daylightChangeElement.innerHTML = `${(daylightChange / (1000 * 60)).toFixed(2)} minutes`;

      // Schedule notifications if enabled
      if (Notification.permission === "granted") {
        const sunriseTodayDate = new Date(sunriseToday);
        const sunriseYesterdayDate = new Date(sunriseYesterday);
        const sunsetTodayDate = new Date(sunsetToday);
        const sunsetYesterdayDate = new Date(sunsetYesterday);

        const sunriseDiff = sunriseTodayDate - sunriseYesterdayDate;
        const sunsetDiff = sunsetTodayDate - sunsetYesterdayDate;

        let scheduledMessages = [];
        let latestNotificationTime = null;

        // Schedule sunrise notification
        if (sunriseDiff !== 0) {
          const isGaining = sunriseDiff < 0; // Earlier sunrise = gaining daylight
          const message = isGaining
            ? `Your extra ${formatTimeDifference(sunriseDiff)} of morning sunlight starts now, enjoy it!`
            : `You just lost ${formatTimeDifference(sunriseDiff)} of morning sunlight.`;

          const notificationTime = isGaining ? sunriseYesterdayDate : sunriseTodayDate;
          const delay = scheduleNotification("Sunrise Change", message, notificationTime, () => {
            // After notification fires, check if this is the last one
            const now = new Date();
            if (!latestNotificationTime || now >= latestNotificationTime) {
              // Fetch new data for tomorrow's notifications
              fetchAndScheduleNotifications();
            }
          });

          if (delay) {
            scheduledMessages.push(`Sunrise notification scheduled in ${formatTimeDifference(delay)}`);
            if (!latestNotificationTime || notificationTime > latestNotificationTime) {
              latestNotificationTime = notificationTime;
            }
          } else {
            scheduledMessages.push(`Sunrise notification time has passed`);
          }
        }

        // Schedule sunset notification
        if (sunsetDiff !== 0) {
          const isGaining = sunsetDiff > 0; // Later sunset = gaining daylight
          const message = isGaining
            ? `Your extra ${formatTimeDifference(sunsetDiff)} of evening sunlight starts now, enjoy it!`
            : `You just lost ${formatTimeDifference(sunsetDiff)} of evening sunlight.`;

          const notificationTime = isGaining ? sunsetYesterdayDate : sunsetTodayDate;
          const delay = scheduleNotification("Sunset Change", message, notificationTime, () => {
            // After notification fires, check if this is the last one
            const now = new Date();
            if (!latestNotificationTime || now >= latestNotificationTime) {
              // Fetch new data for tomorrow's notifications
              fetchAndScheduleNotifications();
            }
          });

          if (delay) {
            scheduledMessages.push(`Sunset notification scheduled in ${formatTimeDifference(delay)}`);
            if (!latestNotificationTime || notificationTime > latestNotificationTime) {
              latestNotificationTime = notificationTime;
            }
          } else {
            scheduledMessages.push(`Sunset notification time has passed`);
          }
        }

        if (scheduledMessages.length > 0) {
          scheduledNotificationsElement.innerHTML = scheduledMessages.join('<br>');
        } else {
          scheduledNotificationsElement.innerHTML = 'No daylight change today';
        }
      }
    }

    /**
     * Get the user's current location using the Geolocation API.
     */
    async function getLocation() {
      if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(async (position) => {
          // Success function
          console.log(position);
          latitude = position.coords.latitude;
          longitude = position.coords.longitude;

          latitudeElement.innerHTML = latitude;
          longitudeElement.innerHTML = longitude;

          // Request notification permission
          await requestNotificationPermission();

          // Fetch data and schedule notifications
          await fetchAndScheduleNotifications();

          // Update gradient every minute
          setInterval(() => {
            const now = new Date();
            updateBackgroundGradient(sunriseElement.innerHTML, sunsetElement.innerHTML);
          }, 60000);
        }, () => {
          // Error function
          latitudeElement.innerHTML = "Unable to retrieve your location.";
          longitudeElement.innerHTML = "Unable to retrieve your location.";
        });
      } else {
        latitudeElement.innerHTML = "Geolocation is not supported by this browser.";
        longitudeElement.innerHTML = "Geolocation is not supported by this browser.";
      }
    }

    /**
     * Fetch sunrise and sunset data from the Sunrise-Sunset API.
     */
    async function fetchSunData(date) {
      const dateString = date ? date.toISOString().split('T')[0] : 'today';
      const apiUrl = `https://api.sunrise-sunset.org/json?lat=${latitude}&lng=${longitude}&formatted=0&date=${dateString}`;

      return fetch(apiUrl)
        .then(response => response.json())
        .then(data => {
          console.log(data);
          const sunrise = data.results.sunrise;
          const sunset = data.results.sunset;

          console.log("Sunrise:", sunrise);
          console.log("Sunset:", sunset);
          return [sunrise, sunset];
        })
        .catch(error => {
          console.error('Error fetching sun data:', error);
        });
    }
  </script>
</html>