mirror of
https://github.com/smittix/intercept.git
synced 2026-04-24 14:50:00 -07:00
feat: Add ISS SSTV decoder mode
Add slow-scan television decoder for receiving images from ISS. Includes new Space dropdown in navigation grouping Satellite and SSTV modes. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Smittix
454
static/js/modes/sstv.js
Normal file
454
static/js/modes/sstv.js
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@@ -0,0 +1,454 @@
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/**
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* SSTV Mode
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* ISS Slow-Scan Television decoder interface
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*/
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const SSTV = (function() {
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// State
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let isRunning = false;
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let eventSource = null;
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let images = [];
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let currentMode = null;
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let progress = 0;
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// ISS frequency
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const ISS_FREQ = 145.800;
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/**
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* Initialize the SSTV mode
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*/
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function init() {
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checkStatus();
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loadImages();
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loadIssSchedule();
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}
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/**
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* Check current decoder status
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*/
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async function checkStatus() {
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try {
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const response = await fetch('/sstv/status');
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const data = await response.json();
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if (!data.available) {
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updateStatusUI('unavailable', 'Decoder not installed');
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showStatusMessage('SSTV decoder not available. Install slowrx: apt install slowrx', 'warning');
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return;
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}
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if (data.running) {
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isRunning = true;
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updateStatusUI('listening', 'Listening...');
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startStream();
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} else {
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updateStatusUI('idle', 'Idle');
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}
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// Update image count
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updateImageCount(data.image_count || 0);
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} catch (err) {
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console.error('Failed to check SSTV status:', err);
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}
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}
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/**
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* Start SSTV decoder
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*/
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async function start() {
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const freqInput = document.getElementById('sstvFrequency');
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const deviceSelect = document.getElementById('sstvDevice');
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const frequency = parseFloat(freqInput?.value || ISS_FREQ);
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const device = parseInt(deviceSelect?.value || '0', 10);
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updateStatusUI('connecting', 'Starting...');
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try {
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const response = await fetch('/sstv/start', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ frequency, device })
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});
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const data = await response.json();
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if (data.status === 'started' || data.status === 'already_running') {
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isRunning = true;
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updateStatusUI('listening', `${frequency} MHz`);
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startStream();
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showNotification('SSTV', `Listening on ${frequency} MHz`);
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} else {
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updateStatusUI('idle', 'Start failed');
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showStatusMessage(data.message || 'Failed to start decoder', 'error');
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}
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} catch (err) {
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console.error('Failed to start SSTV:', err);
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updateStatusUI('idle', 'Error');
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showStatusMessage('Connection error: ' + err.message, 'error');
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}
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}
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/**
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* Stop SSTV decoder
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*/
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async function stop() {
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try {
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await fetch('/sstv/stop', { method: 'POST' });
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isRunning = false;
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stopStream();
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updateStatusUI('idle', 'Stopped');
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showNotification('SSTV', 'Decoder stopped');
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} catch (err) {
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console.error('Failed to stop SSTV:', err);
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}
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}
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/**
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* Update status UI elements
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*/
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function updateStatusUI(status, text) {
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const dot = document.getElementById('sstvStripDot');
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const statusText = document.getElementById('sstvStripStatus');
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const startBtn = document.getElementById('sstvStartBtn');
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const stopBtn = document.getElementById('sstvStopBtn');
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if (dot) {
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dot.className = 'sstv-strip-dot';
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if (status === 'listening' || status === 'detecting') {
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dot.classList.add('listening');
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} else if (status === 'decoding') {
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dot.classList.add('decoding');
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} else {
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dot.classList.add('idle');
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}
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}
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if (statusText) {
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statusText.textContent = text || status;
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}
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if (startBtn && stopBtn) {
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if (status === 'listening' || status === 'decoding') {
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startBtn.style.display = 'none';
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stopBtn.style.display = 'inline-block';
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} else {
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startBtn.style.display = 'inline-block';
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stopBtn.style.display = 'none';
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}
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}
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// Update live content area
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const liveContent = document.getElementById('sstvLiveContent');
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if (liveContent) {
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if (status === 'idle' || status === 'unavailable') {
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liveContent.innerHTML = renderIdleState();
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}
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}
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}
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/**
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* Render idle state HTML
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*/
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function renderIdleState() {
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return `
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<div class="sstv-idle-state">
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<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
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<rect x="3" y="3" width="18" height="18" rx="2"/>
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<circle cx="12" cy="12" r="3"/>
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<path d="M3 9h2M19 9h2M3 15h2M19 15h2"/>
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</svg>
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<h4>ISS SSTV Decoder</h4>
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<p>Click Start to listen for SSTV transmissions on 145.800 MHz</p>
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</div>
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`;
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}
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/**
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* Start SSE stream
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*/
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function startStream() {
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if (eventSource) {
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eventSource.close();
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}
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eventSource = new EventSource('/sstv/stream');
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eventSource.onmessage = (e) => {
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try {
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const data = JSON.parse(e.data);
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if (data.type === 'sstv_progress') {
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handleProgress(data);
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}
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} catch (err) {
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console.error('Failed to parse SSE message:', err);
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}
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};
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eventSource.onerror = () => {
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console.warn('SSTV SSE error, will reconnect...');
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setTimeout(() => {
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if (isRunning) startStream();
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}, 3000);
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};
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}
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/**
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* Stop SSE stream
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*/
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function stopStream() {
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if (eventSource) {
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eventSource.close();
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eventSource = null;
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}
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}
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/**
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* Handle progress update
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*/
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function handleProgress(data) {
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currentMode = data.mode || currentMode;
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progress = data.progress || 0;
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// Update status based on decode state
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if (data.status === 'decoding') {
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updateStatusUI('decoding', `Decoding ${currentMode || 'image'}...`);
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renderDecodeProgress(data);
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} else if (data.status === 'complete' && data.image) {
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// New image decoded
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images.unshift(data.image);
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updateImageCount(images.length);
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renderGallery();
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showNotification('SSTV', 'New image decoded!');
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updateStatusUI('listening', 'Listening...');
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} else if (data.status === 'detecting') {
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updateStatusUI('listening', data.message || 'Listening...');
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}
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}
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/**
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* Render decode progress in live area
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*/
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function renderDecodeProgress(data) {
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const liveContent = document.getElementById('sstvLiveContent');
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if (!liveContent) return;
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liveContent.innerHTML = `
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<div class="sstv-canvas-container">
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<canvas id="sstvCanvas" width="320" height="256"></canvas>
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</div>
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<div class="sstv-decode-info">
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<div class="sstv-mode-label">${data.mode || 'Detecting mode...'}</div>
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<div class="sstv-progress-bar">
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<div class="progress" style="width: ${data.progress || 0}%"></div>
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</div>
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<div class="sstv-status-message">${data.message || 'Decoding...'}</div>
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</div>
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`;
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}
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/**
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* Load decoded images
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*/
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async function loadImages() {
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try {
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const response = await fetch('/sstv/images');
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const data = await response.json();
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if (data.status === 'ok') {
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images = data.images || [];
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updateImageCount(images.length);
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renderGallery();
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}
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} catch (err) {
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console.error('Failed to load SSTV images:', err);
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}
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}
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/**
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* Update image count display
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*/
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function updateImageCount(count) {
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const countEl = document.getElementById('sstvImageCount');
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const stripCount = document.getElementById('sstvStripImageCount');
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if (countEl) countEl.textContent = count;
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if (stripCount) stripCount.textContent = count;
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}
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/**
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* Render image gallery
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*/
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function renderGallery() {
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const gallery = document.getElementById('sstvGallery');
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if (!gallery) return;
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if (images.length === 0) {
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gallery.innerHTML = `
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<div class="sstv-gallery-empty">
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<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
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<rect x="3" y="3" width="18" height="18" rx="2"/>
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<circle cx="8.5" cy="8.5" r="1.5"/>
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<polyline points="21 15 16 10 5 21"/>
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</svg>
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<p>No images decoded yet</p>
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</div>
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`;
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return;
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}
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gallery.innerHTML = images.map(img => `
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<div class="sstv-image-card" onclick="SSTV.showImage('${escapeHtml(img.url)}')">
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<img src="${escapeHtml(img.url)}" alt="SSTV Image" class="sstv-image-preview" loading="lazy">
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<div class="sstv-image-info">
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<div class="sstv-image-mode">${escapeHtml(img.mode || 'Unknown')}</div>
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<div class="sstv-image-timestamp">${formatTimestamp(img.timestamp)}</div>
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</div>
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</div>
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`).join('');
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}
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/**
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* Load ISS pass schedule
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*/
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async function loadIssSchedule() {
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// Try to get user's location
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const lat = localStorage.getItem('observerLat') || 51.5074;
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const lon = localStorage.getItem('observerLon') || -0.1278;
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try {
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const response = await fetch(`/sstv/iss-schedule?latitude=${lat}&longitude=${lon}&hours=48`);
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const data = await response.json();
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if (data.status === 'ok' && data.passes && data.passes.length > 0) {
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renderIssInfo(data.passes[0]);
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} else {
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renderIssInfo(null);
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}
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} catch (err) {
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console.error('Failed to load ISS schedule:', err);
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renderIssInfo(null);
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}
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}
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/**
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* Render ISS pass info
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*/
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function renderIssInfo(nextPass) {
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const container = document.getElementById('sstvIssInfo');
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if (!container) return;
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if (!nextPass) {
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container.innerHTML = `
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<div class="sstv-iss-info">
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<svg class="sstv-iss-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
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<path d="M13 7L9 3 5 7l4 4"/>
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<path d="m17 11 4 4-4 4-4-4"/>
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<path d="m8 12 4 4 6-6-4-4-6 6"/>
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</svg>
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<div class="sstv-iss-details">
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<div class="sstv-iss-label">Next ISS Pass</div>
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<div class="sstv-iss-value">Unknown - Set location in settings</div>
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<div class="sstv-iss-note">Check ARISS.org for SSTV event schedules</div>
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</div>
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</div>
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`;
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return;
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}
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container.innerHTML = `
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<div class="sstv-iss-info">
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<svg class="sstv-iss-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
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<path d="M13 7L9 3 5 7l4 4"/>
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<path d="m17 11 4 4-4 4-4-4"/>
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<path d="m8 12 4 4 6-6-4-4-6 6"/>
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</svg>
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<div class="sstv-iss-details">
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<div class="sstv-iss-label">Next ISS Pass</div>
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<div class="sstv-iss-value">${nextPass.startTime} (${nextPass.maxEl}° max elevation)</div>
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<div class="sstv-iss-note">Duration: ${nextPass.duration} min | Check ARISS.org for SSTV events</div>
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</div>
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</div>
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`;
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}
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/**
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* Show full-size image in modal
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*/
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function showImage(url) {
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let modal = document.getElementById('sstvImageModal');
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if (!modal) {
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modal = document.createElement('div');
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modal.id = 'sstvImageModal';
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modal.className = 'sstv-image-modal';
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modal.innerHTML = `
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<button class="sstv-modal-close" onclick="SSTV.closeImage()">×</button>
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<img src="" alt="SSTV Image">
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`;
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modal.addEventListener('click', (e) => {
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if (e.target === modal) closeImage();
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});
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document.body.appendChild(modal);
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}
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modal.querySelector('img').src = url;
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modal.classList.add('show');
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}
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/**
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* Close image modal
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*/
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function closeImage() {
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const modal = document.getElementById('sstvImageModal');
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if (modal) modal.classList.remove('show');
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}
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/**
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* Format timestamp for display
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*/
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function formatTimestamp(isoString) {
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if (!isoString) return '--';
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try {
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const date = new Date(isoString);
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return date.toLocaleString();
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} catch {
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return isoString;
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}
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}
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/**
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* Escape HTML for safe display
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*/
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function escapeHtml(text) {
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if (!text) return '';
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const div = document.createElement('div');
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div.textContent = text;
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return div.innerHTML;
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}
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/**
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* Show status message
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*/
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function showStatusMessage(message, type) {
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if (typeof showNotification === 'function') {
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showNotification('SSTV', message);
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} else {
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console.log(`[SSTV ${type}] ${message}`);
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}
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}
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// Public API
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return {
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init,
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start,
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stop,
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loadImages,
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showImage,
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closeImage
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};
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})();
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// Initialize when DOM is ready (will be called by selectMode)
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document.addEventListener('DOMContentLoaded', function() {
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// Initialization happens via selectMode when SSTV mode is activated
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});
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Reference in New Issue
Block a user