Files
intercept/static/js/modes/sstv.js
Smittix e18f85370f feat: Add world map with continents to ISS tracking globe
- Added simplified continent outlines (N/S America, Europe, Africa, Asia, Australia)
- Proper 3D orthographic projection with rotation
- Globe rotates to center on ISS position
- Green landmasses on blue ocean background
- ISS shown in yellow/orange with orbit trail
- Lat/lon grid lines properly projected on sphere

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-29 16:37:54 +00:00

885 lines
30 KiB
JavaScript

/**
* SSTV Mode
* ISS Slow-Scan Television decoder interface
*/
const SSTV = (function() {
// State
let isRunning = false;
let eventSource = null;
let images = [];
let currentMode = null;
let progress = 0;
let globeAnimationId = null;
let issPosition = null;
let issUpdateInterval = null;
// ISS frequency
const ISS_FREQ = 145.800;
/**
* Initialize the SSTV mode
*/
function init() {
checkStatus();
loadImages();
loadLocationInputs();
loadIssSchedule();
initGlobe();
startIssTracking();
}
/**
* Load location into input fields
*/
function loadLocationInputs() {
const latInput = document.getElementById('sstvObsLat');
const lonInput = document.getElementById('sstvObsLon');
const storedLat = localStorage.getItem('observerLat');
const storedLon = localStorage.getItem('observerLon');
if (latInput && storedLat) latInput.value = storedLat;
if (lonInput && storedLon) lonInput.value = storedLon;
// Add change handlers to save and refresh
if (latInput) latInput.addEventListener('change', saveLocationFromInputs);
if (lonInput) lonInput.addEventListener('change', saveLocationFromInputs);
}
/**
* Save location from input fields
*/
function saveLocationFromInputs() {
const latInput = document.getElementById('sstvObsLat');
const lonInput = document.getElementById('sstvObsLon');
const lat = parseFloat(latInput?.value);
const lon = parseFloat(lonInput?.value);
if (!isNaN(lat) && lat >= -90 && lat <= 90 &&
!isNaN(lon) && lon >= -180 && lon <= 180) {
localStorage.setItem('observerLat', lat.toString());
localStorage.setItem('observerLon', lon.toString());
loadIssSchedule(); // Refresh pass predictions
}
}
/**
* Use GPS to get location
*/
function useGPS(btn) {
if (!navigator.geolocation) {
showNotification('SSTV', 'GPS not available in this browser');
return;
}
const originalText = btn.innerHTML;
btn.innerHTML = '<span style="opacity: 0.7;">...</span>';
btn.disabled = true;
navigator.geolocation.getCurrentPosition(
(pos) => {
const latInput = document.getElementById('sstvObsLat');
const lonInput = document.getElementById('sstvObsLon');
const lat = pos.coords.latitude.toFixed(4);
const lon = pos.coords.longitude.toFixed(4);
if (latInput) latInput.value = lat;
if (lonInput) lonInput.value = lon;
localStorage.setItem('observerLat', lat);
localStorage.setItem('observerLon', lon);
btn.innerHTML = originalText;
btn.disabled = false;
showNotification('SSTV', 'Location updated from GPS');
loadIssSchedule();
},
(err) => {
btn.innerHTML = originalText;
btn.disabled = false;
let msg = 'Failed to get location';
if (err.code === 1) msg = 'Location access denied';
else if (err.code === 2) msg = 'Location unavailable';
showNotification('SSTV', msg);
},
{ enableHighAccuracy: true, timeout: 10000 }
);
}
/**
* Update TLE data from CelesTrak
*/
async function updateTLE(btn) {
const originalText = btn.innerHTML;
btn.innerHTML = '<span style="opacity: 0.7;">Updating...</span>';
btn.disabled = true;
try {
const response = await fetch('/satellite/update-tle', { method: 'POST' });
const data = await response.json();
if (data.status === 'success') {
showNotification('SSTV', `TLE updated: ${data.updated?.length || 0} satellites`);
loadIssSchedule(); // Refresh predictions with new TLE
} else {
showNotification('SSTV', data.message || 'TLE update failed');
}
} catch (err) {
console.error('TLE update error:', err);
showNotification('SSTV', 'Failed to update TLE');
}
btn.innerHTML = originalText;
btn.disabled = false;
}
/**
* Initialize 3D globe
*/
function initGlobe() {
const canvas = document.getElementById('sstvGlobe');
if (!canvas) return;
renderGlobe();
}
/**
* Start ISS position tracking
*/
function startIssTracking() {
updateIssPosition();
// Update every 5 seconds
if (issUpdateInterval) clearInterval(issUpdateInterval);
issUpdateInterval = setInterval(updateIssPosition, 5000);
}
/**
* Stop ISS tracking
*/
function stopIssTracking() {
if (issUpdateInterval) {
clearInterval(issUpdateInterval);
issUpdateInterval = null;
}
if (globeAnimationId) {
cancelAnimationFrame(globeAnimationId);
globeAnimationId = null;
}
}
/**
* Fetch current ISS position
*/
async function updateIssPosition() {
const storedLat = localStorage.getItem('observerLat') || '51.5074';
const storedLon = localStorage.getItem('observerLon') || '-0.1278';
try {
const url = `/sstv/iss-position?latitude=${storedLat}&longitude=${storedLon}`;
const response = await fetch(url);
const data = await response.json();
if (data.status === 'ok') {
issPosition = data;
updateIssDisplay();
renderGlobe();
console.log('ISS position updated:', data.lat.toFixed(1), data.lon.toFixed(1));
} else {
console.warn('ISS position error:', data.message);
}
} catch (err) {
console.error('Failed to get ISS position:', err);
}
}
/**
* Update ISS position display
*/
function updateIssDisplay() {
if (!issPosition) return;
const latEl = document.getElementById('sstvIssLat');
const lonEl = document.getElementById('sstvIssLon');
const altEl = document.getElementById('sstvIssAlt');
if (latEl) latEl.textContent = issPosition.lat.toFixed(1) + '°';
if (lonEl) lonEl.textContent = issPosition.lon.toFixed(1) + '°';
if (altEl) altEl.textContent = Math.round(issPosition.altitude);
}
// Simplified world map continent outlines (lon, lat pairs)
const continents = {
northAmerica: [
[-168, 65], [-168, 52], [-130, 42], [-117, 32], [-105, 25], [-97, 25],
[-82, 10], [-77, 8], [-82, 15], [-87, 21], [-90, 21], [-97, 26],
[-105, 30], [-117, 33], [-125, 40], [-125, 49], [-140, 60], [-168, 65]
],
southAmerica: [
[-82, 10], [-77, 8], [-70, 12], [-60, 5], [-50, 0], [-35, -5],
[-35, -22], [-48, -28], [-58, -40], [-68, -55], [-75, -50], [-75, -40],
[-70, -18], [-80, 0], [-82, 10]
],
europe: [
[-10, 36], [0, 38], [5, 44], [-5, 48], [0, 52], [10, 55], [25, 55],
[30, 60], [28, 70], [10, 72], [-10, 65], [-25, 66], [-20, 55], [-10, 50], [-10, 36]
],
africa: [
[-18, 28], [-5, 36], [10, 37], [25, 32], [35, 30], [43, 12], [52, 12],
[42, 0], [40, -12], [35, -25], [20, -35], [18, -28], [12, -5], [-5, 5],
[-18, 15], [-18, 28]
],
asia: [
[25, 32], [35, 30], [43, 12], [52, 12], [60, 22], [70, 22], [75, 15],
[80, 8], [88, 22], [100, 22], [105, 10], [120, 22], [135, 35], [140, 45],
[145, 50], [160, 62], [170, 65], [180, 68], [180, 75], [100, 78],
[70, 75], [50, 70], [40, 65], [30, 60], [25, 55], [30, 45], [25, 32]
],
australia: [
[115, -20], [130, -12], [142, -12], [150, -22], [153, -28], [150, -38],
[140, -38], [130, -32], [115, -35], [115, -20]
]
};
/**
* Project lat/lon to x/y on globe with rotation
*/
function projectPoint(lat, lon, cx, cy, radius, rotation) {
const lonRad = (lon + rotation) * Math.PI / 180;
const latRad = lat * Math.PI / 180;
// Check if point is on visible hemisphere
const x3d = Math.cos(latRad) * Math.sin(lonRad);
const z3d = Math.cos(latRad) * Math.cos(lonRad);
if (z3d < 0) return null; // Behind globe
const x = cx + x3d * radius;
const y = cy - Math.sin(latRad) * radius;
return { x, y, z: z3d };
}
/**
* Render 3D globe with ISS position and world map
*/
function renderGlobe() {
const canvas = document.getElementById('sstvGlobe');
if (!canvas) return;
const ctx = canvas.getContext('2d');
const cx = canvas.width / 2;
const cy = canvas.height / 2;
const radius = Math.min(cx, cy) - 10;
// Globe rotation - center on ISS longitude if available
const globeRotation = issPosition ? -issPosition.lon : 0;
// Clear canvas
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Draw ocean background
const oceanGradient = ctx.createRadialGradient(cx - radius * 0.3, cy - radius * 0.3, 0, cx, cy, radius);
oceanGradient.addColorStop(0, '#1a5a8e');
oceanGradient.addColorStop(0.5, '#0d3a5a');
oceanGradient.addColorStop(1, '#061828');
ctx.beginPath();
ctx.arc(cx, cy, radius, 0, Math.PI * 2);
ctx.fillStyle = oceanGradient;
ctx.fill();
// Draw continents
ctx.fillStyle = 'rgba(34, 139, 87, 0.7)';
ctx.strokeStyle = 'rgba(50, 180, 120, 0.8)';
ctx.lineWidth = 1;
for (const [name, coords] of Object.entries(continents)) {
ctx.beginPath();
let started = false;
let lastVisible = false;
for (let i = 0; i < coords.length; i++) {
const [lon, lat] = coords[i];
const point = projectPoint(lat, lon, cx, cy, radius, globeRotation);
if (point) {
if (!started || !lastVisible) {
ctx.moveTo(point.x, point.y);
started = true;
} else {
ctx.lineTo(point.x, point.y);
}
lastVisible = true;
} else {
lastVisible = false;
}
}
ctx.fill();
ctx.stroke();
}
// Draw latitude/longitude grid
ctx.strokeStyle = 'rgba(0, 212, 255, 0.2)';
ctx.lineWidth = 0.5;
// Latitude lines
for (let lat = -60; lat <= 60; lat += 30) {
ctx.beginPath();
for (let lon = -180; lon <= 180; lon += 5) {
const point = projectPoint(lat, lon, cx, cy, radius, globeRotation);
if (point) {
if (lon === -180 || !projectPoint(lat, lon - 5, cx, cy, radius, globeRotation)) {
ctx.moveTo(point.x, point.y);
} else {
ctx.lineTo(point.x, point.y);
}
}
}
ctx.stroke();
}
// Longitude lines
for (let lon = -180; lon < 180; lon += 30) {
ctx.beginPath();
for (let lat = -90; lat <= 90; lat += 5) {
const point = projectPoint(lat, lon, cx, cy, radius, globeRotation);
if (point) {
if (lat === -90 || !projectPoint(lat - 5, lon, cx, cy, radius, globeRotation)) {
ctx.moveTo(point.x, point.y);
} else {
ctx.lineTo(point.x, point.y);
}
}
}
ctx.stroke();
}
// Draw ISS position - always at center since globe rotates to it
if (issPosition) {
const issLat = issPosition.lat;
// ISS is at center horizontally
const point = projectPoint(issLat, 0, cx, cy, radius, 0);
if (point) {
const x = point.x;
const y = point.y;
// ISS orbit trail (behind it)
ctx.strokeStyle = 'rgba(0, 212, 255, 0.3)';
ctx.lineWidth = 2;
ctx.setLineDash([4, 4]);
ctx.beginPath();
for (let trailLon = -60; trailLon <= 0; trailLon += 3) {
// Approximate orbit inclination of 51.6 degrees
const trailLat = issLat + Math.sin(trailLon * Math.PI / 180) * 10;
const trailPoint = projectPoint(trailLat, trailLon, cx, cy, radius, 0);
if (trailPoint) {
if (trailLon === -60) {
ctx.moveTo(trailPoint.x, trailPoint.y);
} else {
ctx.lineTo(trailPoint.x, trailPoint.y);
}
}
}
ctx.stroke();
ctx.setLineDash([]);
// ISS glow
const issGradient = ctx.createRadialGradient(x, y, 0, x, y, 25);
issGradient.addColorStop(0, 'rgba(255, 200, 0, 0.9)');
issGradient.addColorStop(0.3, 'rgba(255, 150, 0, 0.5)');
issGradient.addColorStop(1, 'rgba(255, 100, 0, 0)');
ctx.beginPath();
ctx.arc(x, y, 25, 0, Math.PI * 2);
ctx.fillStyle = issGradient;
ctx.fill();
// ISS dot
ctx.beginPath();
ctx.arc(x, y, 6, 0, Math.PI * 2);
ctx.fillStyle = '#ffcc00';
ctx.fill();
ctx.strokeStyle = '#fff';
ctx.lineWidth = 2;
ctx.stroke();
// ISS label
ctx.fillStyle = '#ffcc00';
ctx.font = 'bold 10px JetBrains Mono, monospace';
ctx.textAlign = 'center';
ctx.fillText('ISS', x, y - 18);
}
}
// Draw globe edge highlight
ctx.beginPath();
ctx.arc(cx, cy, radius, 0, Math.PI * 2);
ctx.strokeStyle = 'rgba(0, 212, 255, 0.5)';
ctx.lineWidth = 2;
ctx.stroke();
// Atmospheric glow
const atmoGradient = ctx.createRadialGradient(cx, cy, radius - 5, cx, cy, radius + 12);
atmoGradient.addColorStop(0, 'rgba(100, 180, 255, 0)');
atmoGradient.addColorStop(0.5, 'rgba(100, 180, 255, 0.15)');
atmoGradient.addColorStop(1, 'rgba(100, 180, 255, 0)');
ctx.beginPath();
ctx.arc(cx, cy, radius + 12, 0, Math.PI * 2);
ctx.fillStyle = atmoGradient;
ctx.fill();
}
/**
* Check current decoder status
*/
async function checkStatus() {
try {
const response = await fetch('/sstv/status');
const data = await response.json();
if (!data.available) {
updateStatusUI('unavailable', 'Decoder not installed');
showStatusMessage('SSTV decoder not available. Install slowrx: apt install slowrx', 'warning');
return;
}
if (data.running) {
isRunning = true;
updateStatusUI('listening', 'Listening...');
startStream();
} else {
updateStatusUI('idle', 'Idle');
}
// Update image count
updateImageCount(data.image_count || 0);
} catch (err) {
console.error('Failed to check SSTV status:', err);
}
}
/**
* Start SSTV decoder
*/
async function start() {
const freqInput = document.getElementById('sstvFrequency');
const deviceSelect = document.getElementById('sstvDevice');
const frequency = parseFloat(freqInput?.value || ISS_FREQ);
const device = parseInt(deviceSelect?.value || '0', 10);
updateStatusUI('connecting', 'Starting...');
try {
const response = await fetch('/sstv/start', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ frequency, device })
});
const data = await response.json();
if (data.status === 'started' || data.status === 'already_running') {
isRunning = true;
updateStatusUI('listening', `${frequency} MHz`);
startStream();
showNotification('SSTV', `Listening on ${frequency} MHz`);
} else {
updateStatusUI('idle', 'Start failed');
showStatusMessage(data.message || 'Failed to start decoder', 'error');
}
} catch (err) {
console.error('Failed to start SSTV:', err);
updateStatusUI('idle', 'Error');
showStatusMessage('Connection error: ' + err.message, 'error');
}
}
/**
* Stop SSTV decoder
*/
async function stop() {
try {
await fetch('/sstv/stop', { method: 'POST' });
isRunning = false;
stopStream();
updateStatusUI('idle', 'Stopped');
showNotification('SSTV', 'Decoder stopped');
} catch (err) {
console.error('Failed to stop SSTV:', err);
}
}
/**
* Update status UI elements
*/
function updateStatusUI(status, text) {
const dot = document.getElementById('sstvStripDot');
const statusText = document.getElementById('sstvStripStatus');
const startBtn = document.getElementById('sstvStartBtn');
const stopBtn = document.getElementById('sstvStopBtn');
if (dot) {
dot.className = 'sstv-strip-dot';
if (status === 'listening' || status === 'detecting') {
dot.classList.add('listening');
} else if (status === 'decoding') {
dot.classList.add('decoding');
} else {
dot.classList.add('idle');
}
}
if (statusText) {
statusText.textContent = text || status;
}
if (startBtn && stopBtn) {
if (status === 'listening' || status === 'decoding') {
startBtn.style.display = 'none';
stopBtn.style.display = 'inline-block';
} else {
startBtn.style.display = 'inline-block';
stopBtn.style.display = 'none';
}
}
// Update live content area
const liveContent = document.getElementById('sstvLiveContent');
if (liveContent) {
if (status === 'idle' || status === 'unavailable') {
liveContent.innerHTML = renderIdleState();
}
}
}
/**
* Render idle state HTML
*/
function renderIdleState() {
return `
<div class="sstv-idle-state">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
<rect x="3" y="3" width="18" height="18" rx="2"/>
<circle cx="12" cy="12" r="3"/>
<path d="M3 9h2M19 9h2M3 15h2M19 15h2"/>
</svg>
<h4>ISS SSTV Decoder</h4>
<p>Click Start to listen for SSTV transmissions on 145.800 MHz</p>
</div>
`;
}
/**
* Start SSE stream
*/
function startStream() {
if (eventSource) {
eventSource.close();
}
eventSource = new EventSource('/sstv/stream');
eventSource.onmessage = (e) => {
try {
const data = JSON.parse(e.data);
if (data.type === 'sstv_progress') {
handleProgress(data);
}
} catch (err) {
console.error('Failed to parse SSE message:', err);
}
};
eventSource.onerror = () => {
console.warn('SSTV SSE error, will reconnect...');
setTimeout(() => {
if (isRunning) startStream();
}, 3000);
};
}
/**
* Stop SSE stream
*/
function stopStream() {
if (eventSource) {
eventSource.close();
eventSource = null;
}
}
/**
* Handle progress update
*/
function handleProgress(data) {
currentMode = data.mode || currentMode;
progress = data.progress || 0;
// Update status based on decode state
if (data.status === 'decoding') {
updateStatusUI('decoding', `Decoding ${currentMode || 'image'}...`);
renderDecodeProgress(data);
} else if (data.status === 'complete' && data.image) {
// New image decoded
images.unshift(data.image);
updateImageCount(images.length);
renderGallery();
showNotification('SSTV', 'New image decoded!');
updateStatusUI('listening', 'Listening...');
} else if (data.status === 'detecting') {
updateStatusUI('listening', data.message || 'Listening...');
}
}
/**
* Render decode progress in live area
*/
function renderDecodeProgress(data) {
const liveContent = document.getElementById('sstvLiveContent');
if (!liveContent) return;
liveContent.innerHTML = `
<div class="sstv-canvas-container">
<canvas id="sstvCanvas" width="320" height="256"></canvas>
</div>
<div class="sstv-decode-info">
<div class="sstv-mode-label">${data.mode || 'Detecting mode...'}</div>
<div class="sstv-progress-bar">
<div class="progress" style="width: ${data.progress || 0}%"></div>
</div>
<div class="sstv-status-message">${data.message || 'Decoding...'}</div>
</div>
`;
}
/**
* Load decoded images
*/
async function loadImages() {
try {
const response = await fetch('/sstv/images');
const data = await response.json();
if (data.status === 'ok') {
images = data.images || [];
updateImageCount(images.length);
renderGallery();
}
} catch (err) {
console.error('Failed to load SSTV images:', err);
}
}
/**
* Update image count display
*/
function updateImageCount(count) {
const countEl = document.getElementById('sstvImageCount');
const stripCount = document.getElementById('sstvStripImageCount');
if (countEl) countEl.textContent = count;
if (stripCount) stripCount.textContent = count;
}
/**
* Render image gallery
*/
function renderGallery() {
const gallery = document.getElementById('sstvGallery');
if (!gallery) return;
if (images.length === 0) {
gallery.innerHTML = `
<div class="sstv-gallery-empty">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<rect x="3" y="3" width="18" height="18" rx="2"/>
<circle cx="8.5" cy="8.5" r="1.5"/>
<polyline points="21 15 16 10 5 21"/>
</svg>
<p>No images decoded yet</p>
</div>
`;
return;
}
gallery.innerHTML = images.map(img => `
<div class="sstv-image-card" onclick="SSTV.showImage('${escapeHtml(img.url)}')">
<img src="${escapeHtml(img.url)}" alt="SSTV Image" class="sstv-image-preview" loading="lazy">
<div class="sstv-image-info">
<div class="sstv-image-mode">${escapeHtml(img.mode || 'Unknown')}</div>
<div class="sstv-image-timestamp">${formatTimestamp(img.timestamp)}</div>
</div>
</div>
`).join('');
}
/**
* Load ISS pass schedule
*/
async function loadIssSchedule() {
// Try to get user's location from settings
const storedLat = localStorage.getItem('observerLat');
const storedLon = localStorage.getItem('observerLon');
// Check if location is actually set
const hasLocation = storedLat !== null && storedLon !== null;
const lat = storedLat || 51.5074;
const lon = storedLon || -0.1278;
try {
const response = await fetch(`/sstv/iss-schedule?latitude=${lat}&longitude=${lon}&hours=48`);
const data = await response.json();
if (data.status === 'ok' && data.passes && data.passes.length > 0) {
renderIssInfo(data.passes[0], hasLocation);
} else {
renderIssInfo(null, hasLocation);
}
} catch (err) {
console.error('Failed to load ISS schedule:', err);
renderIssInfo(null, hasLocation);
}
}
/**
* Render ISS pass info
*/
function renderIssInfo(nextPass, hasLocation = true) {
const container = document.getElementById('sstvIssInfo');
if (!container) return;
if (!nextPass) {
const locationMsg = hasLocation
? 'No passes in next 48 hours'
: 'Set location in Settings > Location tab';
const noteMsg = hasLocation
? 'Check ARISS.org for SSTV event schedules'
: 'Click the gear icon to open Settings';
container.innerHTML = `
<div class="sstv-iss-info">
<svg class="sstv-iss-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M13 7L9 3 5 7l4 4"/>
<path d="m17 11 4 4-4 4-4-4"/>
<path d="m8 12 4 4 6-6-4-4-6 6"/>
</svg>
<div class="sstv-iss-details">
<div class="sstv-iss-label">Next ISS Pass</div>
<div class="sstv-iss-value">${locationMsg}</div>
<div class="sstv-iss-note">${noteMsg}</div>
</div>
</div>
`;
return;
}
container.innerHTML = `
<div class="sstv-iss-info">
<svg class="sstv-iss-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M13 7L9 3 5 7l4 4"/>
<path d="m17 11 4 4-4 4-4-4"/>
<path d="m8 12 4 4 6-6-4-4-6 6"/>
</svg>
<div class="sstv-iss-details">
<div class="sstv-iss-label">Next ISS Pass</div>
<div class="sstv-iss-value">${nextPass.startTime} (${nextPass.maxEl}° max elevation)</div>
<div class="sstv-iss-note">Duration: ${nextPass.duration} min | Check ARISS.org for SSTV events</div>
</div>
</div>
`;
}
/**
* Show full-size image in modal
*/
function showImage(url) {
let modal = document.getElementById('sstvImageModal');
if (!modal) {
modal = document.createElement('div');
modal.id = 'sstvImageModal';
modal.className = 'sstv-image-modal';
modal.innerHTML = `
<button class="sstv-modal-close" onclick="SSTV.closeImage()">&times;</button>
<img src="" alt="SSTV Image">
`;
modal.addEventListener('click', (e) => {
if (e.target === modal) closeImage();
});
document.body.appendChild(modal);
}
modal.querySelector('img').src = url;
modal.classList.add('show');
}
/**
* Close image modal
*/
function closeImage() {
const modal = document.getElementById('sstvImageModal');
if (modal) modal.classList.remove('show');
}
/**
* Format timestamp for display
*/
function formatTimestamp(isoString) {
if (!isoString) return '--';
try {
const date = new Date(isoString);
return date.toLocaleString();
} catch {
return isoString;
}
}
/**
* Escape HTML for safe display
*/
function escapeHtml(text) {
if (!text) return '';
const div = document.createElement('div');
div.textContent = text;
return div.innerHTML;
}
/**
* Show status message
*/
function showStatusMessage(message, type) {
if (typeof showNotification === 'function') {
showNotification('SSTV', message);
} else {
console.log(`[SSTV ${type}] ${message}`);
}
}
// Public API
return {
init,
start,
stop,
loadImages,
loadIssSchedule,
showImage,
closeImage,
useGPS,
updateTLE,
stopIssTracking
};
})();
// Initialize when DOM is ready (will be called by selectMode)
document.addEventListener('DOMContentLoaded', function() {
// Initialization happens via selectMode when SSTV mode is activated
});