mirror of
https://github.com/smittix/intercept.git
synced 2026-04-24 06:40:00 -07:00
feat: Add VHF DSC Channel 70 monitoring and decoding
- Implement DSC message decoding (Distress, Urgency, Safety, Routine) - Add MMSI country identification via MID lookup - Integrate position extraction and map markers for distress alerts - Implement device conflict detection to prevent SDR collisions with AIS - Add permanent storage for critical alerts and visual UI overlays
This commit is contained in:
Marc
@@ -96,6 +96,23 @@
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</div>
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</div>
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</div>
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<div class="panel dsc-messages">
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<div class="panel-header">
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<span>VHF DSC MESSAGES</span>
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<div class="panel-indicator" id="dscIndicator"></div>
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</div>
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<div class="dsc-alert-summary" id="dscAlertSummary">
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<span class="dsc-alert-count distress" id="dscDistressCount" title="Distress alerts">0 DISTRESS</span>
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<span class="dsc-alert-count urgency" id="dscUrgencyCount" title="Urgency alerts">0 URGENCY</span>
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</div>
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<div class="dsc-list-content" id="dscMessageList">
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<div class="no-messages">
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<div>No DSC messages</div>
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<div style="font-size: 10px; margin-top: 5px;">Start VHF DSC to monitor</div>
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</div>
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</div>
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</div>
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</div>
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<div class="controls-bar">
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@@ -131,6 +148,17 @@
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<button class="start-btn" id="startBtn" onclick="toggleTracking()">START</button>
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</div>
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</div>
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<div class="control-group dsc-group">
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<span class="control-group-label">VHF DSC</span>
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<div class="control-group-items">
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<select id="dscDeviceSelect" title="DSC SDR device (secondary)">
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<option value="0">SDR 0</option>
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</select>
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<input type="number" id="dscGain" value="40" min="0" max="50" style="width: 50px;" title="Gain">
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<button class="start-btn dsc-btn" id="dscStartBtn" onclick="toggleDscTracking()">START DSC</button>
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</div>
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</div>
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</div>
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</main>
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@@ -142,6 +170,13 @@
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let selectedMmsi = null;
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let eventSource = null;
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let isTracking = false;
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// DSC State
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let dscEventSource = null;
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let isDscTracking = false;
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let dscMessages = {};
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let dscMarkers = {};
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let dscAlertCounts = { distress: 0, urgency: 0 };
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let showTrails = false;
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let vesselTrails = {};
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let trailLines = {};
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@@ -290,18 +325,37 @@
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fetch('/devices')
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.then(r => r.json())
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.then(devices => {
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const select = document.getElementById('aisDeviceSelect');
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select.innerHTML = '';
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// Populate AIS device selector
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const aisSelect = document.getElementById('aisDeviceSelect');
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aisSelect.innerHTML = '';
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if (devices.length === 0) {
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select.innerHTML = '<option value="0">No devices</option>';
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aisSelect.innerHTML = '<option value="0">No devices</option>';
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} else {
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devices.forEach((d, i) => {
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const opt = document.createElement('option');
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opt.value = d.index;
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opt.textContent = `SDR ${d.index}: ${d.name}`;
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select.appendChild(opt);
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aisSelect.appendChild(opt);
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});
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}
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// Populate DSC device selector
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const dscSelect = document.getElementById('dscDeviceSelect');
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dscSelect.innerHTML = '';
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if (devices.length === 0) {
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dscSelect.innerHTML = '<option value="0">No devices</option>';
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} else {
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devices.forEach((d, i) => {
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const opt = document.createElement('option');
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opt.value = d.index;
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opt.textContent = `SDR ${d.index}: ${d.name}`;
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dscSelect.appendChild(opt);
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});
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// Default to second device if available
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if (devices.length > 1) {
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dscSelect.value = devices[1].index;
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}
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}
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})
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.catch(() => {});
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}
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@@ -758,6 +812,238 @@
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}
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}
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// ============================================
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// DSC (Digital Selective Calling) Functions
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// ============================================
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function toggleDscTracking() {
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if (isDscTracking) {
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stopDscTracking();
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} else {
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startDscTracking();
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}
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}
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function startDscTracking() {
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const device = document.getElementById('dscDeviceSelect').value;
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const gain = document.getElementById('dscGain').value;
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fetch('/dsc/start', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ device, gain })
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})
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.then(r => r.json())
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.then(data => {
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if (data.status === 'started') {
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isDscTracking = true;
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document.getElementById('dscStartBtn').textContent = 'STOP DSC';
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document.getElementById('dscStartBtn').classList.add('active');
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document.getElementById('dscIndicator').classList.add('active');
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startDscSSE();
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} else if (data.error_type === 'DEVICE_BUSY') {
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alert('SDR device is busy.\n\n' + data.suggestion);
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} else {
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alert(data.message || 'Failed to start DSC');
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}
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})
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.catch(err => alert('Error: ' + err.message));
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}
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function stopDscTracking() {
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fetch('/dsc/stop', { method: 'POST' })
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.then(r => r.json())
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.then(() => {
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isDscTracking = false;
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document.getElementById('dscStartBtn').textContent = 'START DSC';
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document.getElementById('dscStartBtn').classList.remove('active');
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document.getElementById('dscIndicator').classList.remove('active');
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if (dscEventSource) {
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dscEventSource.close();
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dscEventSource = null;
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}
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});
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}
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function startDscSSE() {
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if (dscEventSource) dscEventSource.close();
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dscEventSource = new EventSource('/dsc/stream');
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dscEventSource.onmessage = function(e) {
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try {
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const data = JSON.parse(e.data);
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if (data.type === 'dsc_message') {
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handleDscMessage(data);
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} else if (data.type === 'error') {
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console.error('DSC error:', data.error);
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if (data.error_type === 'DEVICE_BUSY') {
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alert('DSC: Device became busy. ' + (data.suggestion || ''));
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stopDscTracking();
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}
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}
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} catch (err) {}
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};
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dscEventSource.onerror = function() {
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setTimeout(() => {
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if (isDscTracking) startDscSSE();
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}, 2000);
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};
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}
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function handleDscMessage(data) {
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const msgId = data.id || data.source_mmsi + '_' + Date.now();
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dscMessages[msgId] = data;
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// Update alert counts
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if (data.category === 'DISTRESS') {
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dscAlertCounts.distress++;
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} else if (data.category === 'URGENCY') {
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dscAlertCounts.urgency++;
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}
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// Show prominent alert for distress/urgency
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if (data.is_critical) {
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showDistressAlert(data);
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}
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// Add position marker if coordinates present
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if (data.latitude && data.longitude) {
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addDscPositionMarker(data);
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}
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updateDscMessageList();
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updateDscAlertSummary();
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}
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function showDistressAlert(data) {
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// Create alert notification
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const alertDiv = document.createElement('div');
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alertDiv.className = 'dsc-distress-alert';
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alertDiv.innerHTML = `
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<div class="dsc-alert-header">${data.category}</div>
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<div class="dsc-alert-mmsi">MMSI: ${data.source_mmsi}</div>
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${data.source_country ? `<div class="dsc-alert-country">${data.source_country}</div>` : ''}
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${data.nature_of_distress ? `<div class="dsc-alert-nature">${data.nature_of_distress}</div>` : ''}
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${data.latitude ? `<div class="dsc-alert-position">${data.latitude.toFixed(4)}, ${data.longitude.toFixed(4)}</div>` : ''}
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<button onclick="this.parentElement.remove()">ACKNOWLEDGE</button>
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`;
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document.body.appendChild(alertDiv);
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// Auto-remove after 30 seconds
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setTimeout(() => {
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if (alertDiv.parentElement) alertDiv.remove();
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}, 30000);
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// Play alert sound if available
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try {
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const audio = new Audio('data:audio/wav;base64,UklGRnoGAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQoGAACBhYqFbF1yc3R3eXx+foCAfn59fHt5d3VzcWxnYlxVT0hCOzUuJx8YEAkDAP/+/v7+/v7+/v8AAAECAwUHCQsOEBMWGRwfIiUoKy4xNDc6PT9CRUdKTE5QUlRVV1hZWlpbW1taWVhXVlRTUU9NSkdEQT47ODUyLywpJiMgHRoXFBEOCwgFAwEA/v38+/r5+Pf29fTz8vHw7+7t7Ovq6ejn5uXk4+Lh4N/e3dzb2tnY19bV1NPS0dDPzs3MzMvLy8vMzM3Nzs/Q0dLT1NXW19jZ2tvc3d7f4OHi4+Tl5ufp6uvs7e7v8PHy8/T19vf4+fr7/P3+');
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audio.volume = 0.5;
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audio.play().catch(() => {});
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} catch (e) {}
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}
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function addDscPositionMarker(data) {
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const mmsi = data.source_mmsi;
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// Remove existing marker
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if (dscMarkers[mmsi]) {
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vesselMap.removeLayer(dscMarkers[mmsi]);
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}
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// Create marker with distress icon
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const isDistress = data.category === 'DISTRESS';
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const color = isDistress ? '#ef4444' : (data.category === 'URGENCY' ? '#f59e0b' : '#4a9eff');
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const icon = L.divIcon({
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className: 'dsc-marker',
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html: `<div class="dsc-marker-inner ${isDistress ? 'distress' : ''}" style="background: ${color};">
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<span>⚠</span>
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</div>`,
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iconSize: [28, 28],
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iconAnchor: [14, 14]
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});
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dscMarkers[mmsi] = L.marker([data.latitude, data.longitude], { icon })
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.addTo(vesselMap)
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.bindPopup(`
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<strong>${data.category}</strong><br>
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MMSI: ${mmsi}<br>
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${data.source_country ? `Country: ${data.source_country}<br>` : ''}
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${data.nature_of_distress ? `Nature: ${data.nature_of_distress}<br>` : ''}
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Position: ${data.latitude.toFixed(4)}, ${data.longitude.toFixed(4)}
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`);
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// Pan to distress position
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if (isDistress) {
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vesselMap.setView([data.latitude, data.longitude], 12);
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}
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}
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function updateDscMessageList() {
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const container = document.getElementById('dscMessageList');
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const msgArray = Object.values(dscMessages)
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.sort((a, b) => (b.timestamp || '').localeCompare(a.timestamp || ''));
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if (msgArray.length === 0) {
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container.innerHTML = `
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<div class="no-messages">
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<div>No DSC messages</div>
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<div style="font-size: 10px; margin-top: 5px;">Start VHF DSC to monitor</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 = msgArray.slice(0, 50).map(msg => {
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const isDistress = msg.category === 'DISTRESS';
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const isUrgency = msg.category === 'URGENCY';
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const categoryClass = isDistress ? 'distress' : (isUrgency ? 'urgency' : '');
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return `
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<div class="dsc-message-item ${categoryClass}" data-id="${msg.id}">
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<div class="dsc-message-header">
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<span class="dsc-message-category">${msg.category}</span>
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<span class="dsc-message-time">${formatDscTime(msg.timestamp)}</span>
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</div>
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<div class="dsc-message-mmsi">MMSI: ${msg.source_mmsi}</div>
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${msg.source_country ? `<div class="dsc-message-country">${msg.source_country}</div>` : ''}
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${msg.nature_of_distress ? `<div class="dsc-message-nature">${msg.nature_of_distress}</div>` : ''}
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${msg.latitude ? `<div class="dsc-message-pos">${msg.latitude.toFixed(4)}, ${msg.longitude.toFixed(4)}</div>` : ''}
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</div>
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`;
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}).join('');
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}
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function formatDscTime(timestamp) {
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if (!timestamp) return '--:--';
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try {
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const d = new Date(timestamp);
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return d.toLocaleTimeString('en-GB', { hour: '2-digit', minute: '2-digit', second: '2-digit' });
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} catch (e) {
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return timestamp.slice(11, 19) || '--:--';
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}
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}
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function updateDscAlertSummary() {
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document.getElementById('dscDistressCount').textContent = `${dscAlertCounts.distress} DISTRESS`;
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document.getElementById('dscUrgencyCount').textContent = `${dscAlertCounts.urgency} URGENCY`;
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}
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// Cross-reference DSC MMSI with AIS vessels
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function crossReferenceDscWithAis(mmsi) {
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const vessel = vessels[mmsi];
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if (vessel) {
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return {
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name: vessel.name,
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callsign: vessel.callsign,
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ship_type: vessel.ship_type,
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destination: vessel.destination
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};
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}
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return null;
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}
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// Initialize
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document.addEventListener('DOMContentLoaded', initMap);
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</script>
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