From d234930464a7b36d479bb03ef946a90903951e9b Mon Sep 17 00:00:00 2001 From: zyphlar Date: Sat, 25 Oct 2025 15:38:41 -0700 Subject: [PATCH] Live location web app commit (REMOVE) --- webapp/.env.example | 10 + webapp/.gitignore | 36 + webapp/README.md | 263 ++++++ webapp/package-lock.json | 1655 +++++++++++++++++++++++++++++++++++++ webapp/package.json | 22 + webapp/public/app.js | 472 +++++++++++ webapp/public/crypto.js | 109 +++ webapp/public/index.html | 214 +++++ webapp/public/viewer.html | 252 ++++++ webapp/src/database.js | 240 ++++++ webapp/src/server.js | 274 ++++++ 11 files changed, 3547 insertions(+) create mode 100644 webapp/.env.example create mode 100644 webapp/.gitignore create mode 100644 webapp/README.md create mode 100644 webapp/package-lock.json create mode 100644 webapp/package.json create mode 100644 webapp/public/app.js create mode 100644 webapp/public/crypto.js create mode 100644 webapp/public/index.html create mode 100644 webapp/public/viewer.html create mode 100644 webapp/src/database.js create mode 100644 webapp/src/server.js diff --git a/webapp/.env.example b/webapp/.env.example new file mode 100644 index 000000000..f3d650cc1 --- /dev/null +++ b/webapp/.env.example @@ -0,0 +1,10 @@ +# Server Configuration +PORT=3000 +NODE_ENV=development + +# Database +DATABASE_PATH=./location_sharing.db + +# Session Configuration +SESSION_EXPIRY_HOURS=24 +CLEANUP_INTERVAL_MINUTES=60 diff --git a/webapp/.gitignore b/webapp/.gitignore new file mode 100644 index 000000000..1bce2d10e --- /dev/null +++ b/webapp/.gitignore @@ -0,0 +1,36 @@ +# Dependencies +node_modules/ + +# Database +*.db +*.db-journal + +# Environment +.env +.env.local +.env.*.local + +# Logs +logs/ +*.log +npm-debug.log* +yarn-debug.log* +yarn-error.log* + +# OS +.DS_Store +Thumbs.db + +# IDE +.vscode/ +.idea/ +*.swp +*.swo +*~ + +# Build +dist/ +build/ + +# PM2 +.pm2/ diff --git a/webapp/README.md b/webapp/README.md new file mode 100644 index 000000000..40c510173 --- /dev/null +++ b/webapp/README.md @@ -0,0 +1,263 @@ +# CoMaps Live Location Sharing Server + +A Node.js server for real-time, end-to-end encrypted location sharing with web client viewer. + +## Features + +- **End-to-end encryption**: Location data is encrypted on the device using AES-GCM-256 +- **Real-time updates**: Poll-based location updates every 5 seconds +- **Session management**: Automatic cleanup of expired sessions +- **Web viewer**: Interactive map viewer with Leaflet.js +- **Navigation support**: Display ETA, distance, and destination when navigating +- **Battery monitoring**: Shows battery level and warnings +- **Location history**: Trail visualization with polyline + +## Quick Start + +### Installation + +```bash +cd webapp +npm install +``` + +### Configuration + +Copy `.env.example` to `.env` and configure: + +```bash +cp .env.example .env +``` + +Edit `.env`: +``` +PORT=3000 +NODE_ENV=development +DATABASE_PATH=./location_sharing.db +SESSION_EXPIRY_HOURS=24 +CLEANUP_INTERVAL_MINUTES=60 +``` + +### Running the Server + +Development mode (with auto-reload): +```bash +npm run dev +``` + +Production mode: +```bash +npm start +``` + +The server will start on `http://localhost:3000` + +## API Documentation + +### Create/Reactivate Session + +``` +POST /api/sessions +Content-Type: application/json + +{ + "sessionId": "uuid-string" +} +``` + +### Store Location Update + +``` +POST /api/sessions/:sessionId/location +Content-Type: application/json + +{ + "encryptedPayload": "{\"iv\":\"...\",\"ciphertext\":\"...\",\"authTag\":\"...\"}" +} +``` + +### Get Session Info + +``` +GET /api/sessions/:sessionId +``` + +### Get Latest Location + +``` +GET /api/sessions/:sessionId/location/latest +``` + +### Get Location History + +``` +GET /api/sessions/:sessionId/location/history?limit=100 +``` + +### Stop Session + +``` +DELETE /api/sessions/:sessionId +``` + +### Server Statistics + +``` +GET /api/stats +``` + +## URL Format + +Share URLs are formatted as: +``` +https://your-server.com/live/{base64url(sessionId:encryptionKey)} +``` + +Example: +``` +https://live.organicmaps.app/live/MjAyM...c3NrZXk +``` + +## Database Schema + +### sessions +- `session_id` (TEXT, PRIMARY KEY) +- `created_at` (INTEGER) +- `last_update` (INTEGER) +- `expires_at` (INTEGER) +- `is_active` (INTEGER) + +### location_updates +- `id` (INTEGER, PRIMARY KEY AUTOINCREMENT) +- `session_id` (TEXT, FOREIGN KEY) +- `encrypted_payload` (TEXT) +- `timestamp` (INTEGER) + +## Encryption + +Location data is encrypted using AES-GCM-256 with: +- Random 96-bit IV +- 128-bit authentication tag +- Base64-encoded encryption key (256-bit) + +Encrypted payload format (JSON): +```json +{ + "iv": "base64-encoded-iv", + "ciphertext": "base64-encoded-ciphertext", + "authTag": "base64-encoded-auth-tag" +} +``` + +Decrypted payload format (JSON): +```json +{ + "timestamp": 1234567890, + "lat": 37.7749, + "lon": -122.4194, + "accuracy": 10.5, + "speed": 5.2, + "bearing": 45.0, + "mode": "navigation", + "eta": 1234567900, + "distanceRemaining": 5000, + "destinationName": "Home", + "batteryLevel": 75 +} +``` + +## Web Viewer + +The web viewer is accessible at `/live/{encodedCredentials}` and provides: + +- Interactive map with Leaflet.js and OpenStreetMap tiles +- Real-time location marker with accuracy circle +- Location trail visualization +- Info panel showing: + - Status (live/inactive) + - Coordinates + - Accuracy + - Speed (if available) + - Navigation info (ETA, distance, destination) + - Battery level +- Automatic polling every 5 seconds +- Responsive design (mobile-friendly) + +## Security Considerations + +1. **HTTPS Required**: Always use HTTPS in production to protect the share URLs +2. **Encryption Keys**: Never log or expose encryption keys server-side +3. **Session Expiry**: Sessions automatically expire after 24 hours (configurable) +4. **Rate Limiting**: Consider adding rate limiting for production deployments +5. **CORS**: Configure CORS appropriately for your deployment + +## Production Deployment + +### Using PM2 + +```bash +npm install -g pm2 +pm2 start src/server.js --name location-sharing +pm2 save +pm2 startup +``` + +### Using Docker + +```dockerfile +FROM node:18-alpine +WORKDIR /app +COPY package*.json ./ +RUN npm ci --production +COPY . . +EXPOSE 3000 +CMD ["node", "src/server.js"] +``` + +### Environment Variables + +Set these in production: +``` +NODE_ENV=production +PORT=3000 +DATABASE_PATH=/data/location_sharing.db +SESSION_EXPIRY_HOURS=24 +``` + +## Maintenance + +### Database Cleanup + +The server automatically cleans up: +- Expired sessions (older than expiry time) +- Inactive sessions (older than 1 week) +- Old location updates (older than 1 week) + +Cleanup runs every 60 minutes by default (configurable). + +### Manual Cleanup + +```bash +# Stop the server +# Delete the database file +rm location_sharing.db +# Restart the server (will recreate schema) +``` + +## Troubleshooting + +### Location not updating +- Check that the session is active +- Verify the encrypted payload format +- Check server logs for decryption errors +- Ensure the encryption key matches + +### Web viewer shows error +- Verify the share URL is correct +- Check that the session exists +- Ensure at least one location update has been sent +- Check browser console for decryption errors + +## License + +MIT diff --git a/webapp/package-lock.json b/webapp/package-lock.json new file mode 100644 index 000000000..72dba6c82 --- /dev/null +++ b/webapp/package-lock.json @@ -0,0 +1,1655 @@ +{ + "name": "location-sharing-server", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "location-sharing-server", + "version": "1.0.0", + "license": "MIT", + "dependencies": { + "better-sqlite3": "^9.2.2", + "cors": "^2.8.5", + "dotenv": "^16.3.1", + "express": "^4.18.2" + }, + "devDependencies": { + "nodemon": "^3.0.2" + } + }, + "node_modules/accepts": { + "version": "1.3.8", + 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LocationViewer { + constructor() { + this.map = null; + this.marker = null; + this.polyline = null; + this.sessionId = null; + this.encryptionKey = null; + this.updateInterval = null; + this.locationHistory = []; + this.currentLocation = null; + this.lastUpdateTimestamp = null; + this.lastServerTimestamp = null; + this.isActive = false; + this.isFollowing = true; + this.userMovedMap = false; + this.lastNavigationMode = null; + this.isInitialLoad = true; + } + + /** + * Initialize the application + */ + async init() { + try { + // Parse credentials from URL + const pathParts = window.location.pathname.split('/'); + const encodedCredentials = pathParts[pathParts.length - 1]; + + const credentials = LocationCrypto.parseCredentials(encodedCredentials); + if (!credentials) { + this.showError('Invalid share link'); + return; + } + + this.sessionId = credentials.sessionId; + this.encryptionKey = credentials.encryptionKey; + + // Initialize map + this.initMap(); + + // Load location history first + await this.loadLocationHistory(); + + // Load latest location + await this.loadLocation(); + + // Check session status + await this.checkSessionStatus(); + + // Initial load is complete - now track user interactions + setTimeout(() => { + this.isInitialLoad = false; + }, 1000); + + // Start polling for updates + this.startPolling(); + + // Show info panel + document.getElementById('infoPanel').style.display = 'block'; + document.getElementById('loadingSpinner').style.display = 'none'; + } catch (err) { + console.error('Initialization error:', err); + this.showError(err.message || 'Failed to initialize viewer'); + } + } + + /** + * Initialize the Leaflet map + */ + initMap() { + this.map = L.map('map').setView([0, 0], 2); + + // Use CartoDB Positron - free minimalist black and white tileset + L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png', { + attribution: '© OpenStreetMap contributors © CARTO', + subdomains: 'abcd', + maxZoom: 20 + }).addTo(this.map); + + // Initialize polyline for location history + this.polyline = L.polyline([], { + color: '#2196f3', + weight: 3, + opacity: 0.7 + }).addTo(this.map); + + // Detect user map interaction (manual drag/zoom) + this.map.on('dragstart', () => { + if (!this.isInitialLoad) { + this.userMovedMap = true; + this.isFollowing = false; + this.showFollowButton(); + } + }); + + this.map.on('zoomstart', () => { + if (!this.isInitialLoad) { + this.userMovedMap = true; + this.isFollowing = false; + this.showFollowButton(); + } + }); + + // Set up follow button + const followButton = document.getElementById('followButton'); + followButton.addEventListener('click', () => { + this.isFollowing = true; + this.userMovedMap = false; + this.hideFollowButton(); + if (this.currentLocation) { + this.map.setView([this.currentLocation.lat, this.currentLocation.lon], 15); + } + }); + } + + /** + * Show follow button + */ + showFollowButton() { + document.getElementById('followButton').classList.add('visible'); + } + + /** + * Hide follow button + */ + hideFollowButton() { + document.getElementById('followButton').classList.remove('visible'); + } + + /** + * Load location history from server + */ + async loadLocationHistory(sinceTimestamp = null) { + try { + let url = `/api/sessions/${this.sessionId}/location/history?limit=100`; + if (sinceTimestamp) { + url += `&since=${sinceTimestamp}`; + } + + const response = await fetch(url); + + if (!response.ok) { + return; // History might not be available yet + } + + const data = await response.json(); + const newLocations = []; + + for (const update of data.updates) { + try { + const decrypted = await LocationCrypto.decryptPayload( + update.encryptedPayload, + this.encryptionKey + ); + + // Check if this location is not already in history + const isDuplicate = this.locationHistory.some(loc => + loc.lat === decrypted.lat && + loc.lon === decrypted.lon && + loc.timestamp === decrypted.timestamp + ); + + if (!isDuplicate) { + newLocations.push({ + lat: decrypted.lat, + lon: decrypted.lon, + timestamp: decrypted.timestamp + }); + } + } catch (err) { + console.error('Failed to decrypt historical location:', err); + } + } + + // Add new locations to history sorted by timestamp + this.locationHistory.push(...newLocations); + this.locationHistory.sort((a, b) => a.timestamp - b.timestamp); + + // Update polyline with historical data + if (this.locationHistory.length > 0) { + this.updatePolyline(); + + // Center map on latest location only on first load and if following + if (!sinceTimestamp && this.isFollowing) { + const latestLoc = this.locationHistory[this.locationHistory.length - 1]; + this.map.setView([latestLoc.lat, latestLoc.lon], 15); + } + } + } catch (err) { + console.error('Load history error:', err); + } + } + + /** + * Check session status + */ + async checkSessionStatus() { + try { + const response = await fetch(`/api/v1/session/${this.sessionId}`); + + if (!response.ok) { + this.isActive = false; + return; + } + + const data = await response.json(); + this.isActive = data.isActive; + } catch (err) { + console.error('Check session status error:', err); + this.isActive = false; + } + } + + /** + * Load location from server + */ + async loadLocation() { + try { + const response = await fetch(`/api/v1/location/${this.sessionId}/latest`); + + if (!response.ok) { + if (response.status === 404) { + throw new Error('No location data available yet. Waiting for updates...'); + } + throw new Error('Failed to load location'); + } + + const data = await response.json(); + const newTimestamp = data.timestamp; + + // Check for gap in updates (more than 30 seconds) + if (this.lastServerTimestamp && (newTimestamp - this.lastServerTimestamp) > 30000) { + console.log('Detected gap in updates, loading missing history...'); + await this.loadLocationHistory(this.lastServerTimestamp); + } + + this.lastUpdateTimestamp = data.timestamp; + this.lastServerTimestamp = newTimestamp; + await this.processLocationUpdate(data); + + // Update session status on each location update + await this.checkSessionStatus(); + } catch (err) { + console.error('Load location error:', err); + throw err; + } + } + + /** + * Process an encrypted location update + */ + async processLocationUpdate(data) { + try { + // Decrypt the payload + const decrypted = await LocationCrypto.decryptPayload( + data.encryptedPayload, + this.encryptionKey + ); + + this.currentLocation = decrypted; + + // Update map + this.updateMap(decrypted); + + // Update info panel + this.updateInfoPanel(decrypted, data.timestamp); + + // Add to history only if it's not already there (avoid duplicates) + const isDuplicate = this.locationHistory.some(loc => + loc.lat === decrypted.lat && + loc.lon === decrypted.lon && + loc.timestamp === decrypted.timestamp + ); + + if (!isDuplicate) { + this.locationHistory.push({ + lat: decrypted.lat, + lon: decrypted.lon, + timestamp: decrypted.timestamp + }); + + // Update polyline only when we add a new point + this.updatePolyline(); + } + } catch (err) { + console.error('Failed to process location update:', err); + // Don't throw - just skip this update + } + } + + /** + * Update map with new location + */ + updateMap(location) { + const latLng = [location.lat, location.lon]; + + if (!this.marker) { + // Create marker + const icon = L.divIcon({ + className: 'location-marker', + html: '
', + iconSize: [26, 26], + iconAnchor: [13, 13] + }); + + this.marker = L.marker(latLng, { icon }).addTo(this.map); + if (this.isFollowing) { + this.map.setView(latLng, 15); + } + } else { + // Update marker position + this.marker.setLatLng(latLng); + } + + // Add accuracy circle if available + if (location.accuracy) { + if (this.accuracyCircle) { + this.accuracyCircle.setLatLng(latLng); + this.accuracyCircle.setRadius(location.accuracy); + } else { + this.accuracyCircle = L.circle(latLng, { + radius: location.accuracy, + color: '#2196f3', + fillColor: '#2196f3', + fillOpacity: 0.1, + weight: 1 + }).addTo(this.map); + } + } + + // Pan to new location only if following + if (this.isFollowing) { + this.map.panTo(latLng); + } + } + + /** + * Update polyline with location history + */ + updatePolyline() { + const points = this.locationHistory.map(loc => [loc.lat, loc.lon]); + this.polyline.setLatLngs(points); + } + + /** + * Update info panel + */ + updateInfoPanel(location, serverTimestamp) { + // Determine if session is truly live (updated within last 30 seconds) + const now = Date.now(); + const timeSinceUpdate = now - serverTimestamp; + const isLive = timeSinceUpdate < 30000; + + // Only show status if it's inactive AND there's old data OR session is explicitly closed + let statusHtml = ''; + if (!isLive && timeSinceUpdate > 60000) { + statusHtml = ` +
+ Status + Inactive +
+ `; + } else if (isLive) { + statusHtml = ` +
+ Status + Live +
+ `; + } + + // Show speed if available + if (location.speed !== undefined && location.speed >= 0) { + statusHtml += ` +
+ Speed + ${(location.speed * 3.6).toFixed(1)} km/h +
+ `; + } + + document.getElementById('statusInfo').innerHTML = statusHtml; + + // Navigation info - only show if currently in navigation mode + if (location.mode === 'navigation' && location.eta) { + this.lastNavigationMode = true; + const etaDate = new Date(location.eta * 1000); + const navHtml = ` +
+
NAVIGATION ACTIVE
+ ${location.destinationName ? `
To: ${location.destinationName}
` : ''} +
ETA: ${etaDate.toLocaleTimeString()}
+ ${location.distanceRemaining ? `
Distance: ${(location.distanceRemaining / 1000).toFixed(1)} km
` : ''} +
+ `; + document.getElementById('navInfo').innerHTML = navHtml; + } else if (this.lastNavigationMode && location.mode !== 'navigation') { + // Navigation just ended - clear the display + this.lastNavigationMode = false; + document.getElementById('navInfo').innerHTML = ''; + } else if (!this.lastNavigationMode) { + // Never was in navigation or already cleared + document.getElementById('navInfo').innerHTML = ''; + } + + // Battery warning + if (location.batteryLevel !== undefined && location.batteryLevel < 20) { + document.getElementById('batteryWarning').innerHTML = ` +
+ ⚠️ Low battery: ${location.batteryLevel}% +
+ `; + } else { + document.getElementById('batteryWarning').innerHTML = ''; + } + + // Update time + const updateDate = new Date(serverTimestamp); + document.getElementById('updateTime').innerHTML = ` + Last update: ${updateDate.toLocaleTimeString()} + `; + } + + /** + * Start polling for location updates + */ + startPolling() { + // Poll every 5 seconds + this.updateInterval = setInterval(async () => { + try { + await this.loadLocation(); + } catch (err) { + console.error('Polling error:', err); + // Continue polling even if there's an error + } + }, 5000); + } + + /** + * Stop polling + */ + stopPolling() { + if (this.updateInterval) { + clearInterval(this.updateInterval); + this.updateInterval = null; + } + } + + /** + * Show error message + */ + showError(message) { + document.getElementById('loadingSpinner').style.display = 'none'; + document.getElementById('errorMessage').style.display = 'block'; + document.getElementById('errorText').textContent = message; + } +} + +// Initialize when DOM is ready +document.addEventListener('DOMContentLoaded', () => { + const viewer = new LocationViewer(); + viewer.init(); + + // Cleanup on page unload + window.addEventListener('beforeunload', () => { + viewer.stopPolling(); + }); +}); diff --git a/webapp/public/crypto.js b/webapp/public/crypto.js new file mode 100644 index 000000000..ad9355352 --- /dev/null +++ b/webapp/public/crypto.js @@ -0,0 +1,109 @@ +/** + * Crypto utilities for decrypting location data + * Uses Web Crypto API (AES-GCM-256) + */ + +class LocationCrypto { + /** + * Decode base64url to base64 + */ + static base64UrlToBase64(base64url) { + let base64 = base64url.replace(/-/g, '+').replace(/_/g, '/'); + while (base64.length % 4) { + base64 += '='; + } + return base64; + } + + /** + * Parse the encoded credentials from URL + * Format: sessionId:encryptionKey (base64url encoded) + */ + static parseCredentials(encodedCredentials) { + try { + const base64 = this.base64UrlToBase64(encodedCredentials); + const decoded = atob(base64); + const [sessionId, encryptionKey] = decoded.split(':'); + + if (!sessionId || !encryptionKey) { + throw new Error('Invalid credentials format'); + } + + return { sessionId, encryptionKey }; + } catch (err) { + console.error('Failed to parse credentials:', err); + return null; + } + } + + /** + * Convert base64 encryption key to CryptoKey + */ + static async importKey(base64Key) { + try { + const keyData = Uint8Array.from(atob(base64Key), c => c.charCodeAt(0)); + + return await window.crypto.subtle.importKey( + 'raw', + keyData, + { name: 'AES-GCM', length: 256 }, + false, + ['decrypt'] + ); + } catch (err) { + console.error('Failed to import key:', err); + throw new Error('Invalid encryption key'); + } + } + + /** + * Decrypt the encrypted payload + * Payload format (JSON): { iv: base64, ciphertext: base64, authTag: base64 } + */ + static async decryptPayload(encryptedPayloadJson, encryptionKey) { + try { + // Parse the encrypted payload + const payload = JSON.parse(encryptedPayloadJson); + const { iv, ciphertext, authTag } = payload; + + if (!iv || !ciphertext || !authTag) { + throw new Error('Invalid payload format'); + } + + // Import the key + const cryptoKey = await this.importKey(encryptionKey); + + // Decode base64 components + const ivBytes = Uint8Array.from(atob(iv), c => c.charCodeAt(0)); + const ciphertextBytes = Uint8Array.from(atob(ciphertext), c => c.charCodeAt(0)); + const authTagBytes = Uint8Array.from(atob(authTag), c => c.charCodeAt(0)); + + // Combine ciphertext and auth tag (GCM mode requires them together) + const combined = new Uint8Array(ciphertextBytes.length + authTagBytes.length); + combined.set(ciphertextBytes, 0); + combined.set(authTagBytes, ciphertextBytes.length); + + // Decrypt + const decryptedBuffer = await window.crypto.subtle.decrypt( + { + name: 'AES-GCM', + iv: ivBytes, + tagLength: 128 // 16 bytes = 128 bits + }, + cryptoKey, + combined + ); + + // Convert to string and parse JSON + const decoder = new TextDecoder(); + const decryptedText = decoder.decode(decryptedBuffer); + return JSON.parse(decryptedText); + } catch (err) { + console.error('Decryption failed:', err); + throw new Error('Failed to decrypt location data'); + } + } +} + +// Export for use in app.js +window.LocationCrypto = LocationCrypto; diff --git a/webapp/public/index.html b/webapp/public/index.html new file mode 100644 index 000000000..17f150e1b --- /dev/null +++ b/webapp/public/index.html @@ -0,0 +1,214 @@ + + + + + + CoMaps Live Location Sharing + + + +
+

CoMaps Live Location Sharing

+

+ End-to-end encrypted real-time location sharing server. Share your location securely + with friends and family while navigating. +

+ +
+
+
πŸ”’
+
+ End-to-end encrypted
+ Location data is encrypted on device, only you and recipients can decrypt it +
+
+
+
πŸ—ΊοΈ
+
+ Real-time updates
+ See live location updates with navigation info and ETA +
+
+
+
πŸ“±
+
+ Works everywhere
+ Compatible with CoMaps mobile apps and any web browser +
+
+
+ +
+

API Endpoints

+ +
+ POST + /api/sessions +
+ +
+ POST + /api/sessions/:sessionId/location +
+ +
+ GET + /api/sessions/:sessionId/location/latest +
+ +
+ GET + /api/sessions/:sessionId/location/history +
+ +
+ DELETE + /api/sessions/:sessionId +
+
+ +
+ Loading server statistics... +
+
+ + + + diff --git a/webapp/public/viewer.html b/webapp/public/viewer.html new file mode 100644 index 000000000..c4c5bc4c9 --- /dev/null +++ b/webapp/public/viewer.html @@ -0,0 +1,252 @@ + + + + + + Live Location Sharing - CoMaps + + + + +
+ + + + + + + + + + + + + + diff --git a/webapp/src/database.js b/webapp/src/database.js new file mode 100644 index 000000000..f8eabf260 --- /dev/null +++ b/webapp/src/database.js @@ -0,0 +1,240 @@ +const Database = require('better-sqlite3'); +const path = require('path'); + +class LocationDatabase { + constructor(dbPath) { + this.db = new Database(dbPath || path.join(__dirname, '..', 'location_sharing.db')); + this.initSchema(); + this.setupCleanup(); + } + + initSchema() { + // Create sessions table + this.db.exec(` + CREATE TABLE IF NOT EXISTS sessions ( + session_id TEXT PRIMARY KEY, + created_at INTEGER NOT NULL, + last_update INTEGER NOT NULL, + expires_at INTEGER NOT NULL, + is_active INTEGER DEFAULT 1 + ); + + CREATE INDEX IF NOT EXISTS idx_sessions_active + ON sessions(is_active, expires_at); + `); + + // Create location_updates table + this.db.exec(` + CREATE TABLE IF NOT EXISTS location_updates ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + session_id TEXT NOT NULL, + encrypted_payload TEXT NOT NULL, + timestamp INTEGER NOT NULL, + FOREIGN KEY (session_id) REFERENCES sessions(session_id) ON DELETE CASCADE + ); + + CREATE INDEX IF NOT EXISTS idx_location_session + ON location_updates(session_id, timestamp DESC); + `); + } + + /** + * Create a new session + */ + createSession(sessionId, expiryHours = 24) { + const now = Date.now(); + const expiresAt = now + (expiryHours * 60 * 60 * 1000); + + const stmt = this.db.prepare(` + INSERT INTO sessions (session_id, created_at, last_update, expires_at, is_active) + VALUES (?, ?, ?, ?, 1) + `); + + try { + stmt.run(sessionId, now, now, expiresAt); + return { success: true, sessionId }; + } catch (err) { + if (err.code === 'SQLITE_CONSTRAINT') { + // Session already exists, update it + return this.reactivateSession(sessionId, expiryHours); + } + throw err; + } + } + + /** + * Reactivate an existing session + */ + reactivateSession(sessionId, expiryHours = 24) { + const now = Date.now(); + const expiresAt = now + (expiryHours * 60 * 60 * 1000); + + const stmt = this.db.prepare(` + UPDATE sessions + SET is_active = 1, last_update = ?, expires_at = ? + WHERE session_id = ? + `); + + const result = stmt.run(now, expiresAt, sessionId); + return { + success: result.changes > 0, + sessionId, + reactivated: true + }; + } + + /** + * Store a location update + */ + storeLocationUpdate(sessionId, encryptedPayload) { + const now = Date.now(); + + // First, check if session exists and is active + const session = this.getSession(sessionId); + if (!session || !session.is_active || session.expires_at < now) { + return { success: false, error: 'Session not found or expired' }; + } + + // Update session last_update timestamp + const updateSession = this.db.prepare(` + UPDATE sessions SET last_update = ? WHERE session_id = ? + `); + updateSession.run(now, sessionId); + + // Insert location update + const stmt = this.db.prepare(` + INSERT INTO location_updates (session_id, encrypted_payload, timestamp) + VALUES (?, ?, ?) + `); + + try { + const result = stmt.run(sessionId, encryptedPayload, now); + return { + success: true, + updateId: result.lastInsertRowid + }; + } catch (err) { + return { success: false, error: err.message }; + } + } + + /** + * Get session info + */ + getSession(sessionId) { + const stmt = this.db.prepare(` + SELECT * FROM sessions WHERE session_id = ? + `); + return stmt.get(sessionId); + } + + /** + * Get latest location update for a session + */ + getLatestLocation(sessionId) { + const stmt = this.db.prepare(` + SELECT encrypted_payload, timestamp + FROM location_updates + WHERE session_id = ? + ORDER BY timestamp DESC + LIMIT 1 + `); + return stmt.get(sessionId); + } + + /** + * Get location history for a session + */ + getLocationHistory(sessionId, limit = 100) { + const stmt = this.db.prepare(` + SELECT encrypted_payload, timestamp + FROM location_updates + WHERE session_id = ? + ORDER BY timestamp DESC + LIMIT ? + `); + return stmt.all(sessionId, limit); + } + + /** + * Stop a session + */ + stopSession(sessionId) { + const stmt = this.db.prepare(` + UPDATE sessions SET is_active = 0 WHERE session_id = ? + `); + const result = stmt.run(sessionId); + return { success: result.changes > 0 }; + } + + /** + * Clean up expired sessions and old location updates + */ + cleanup() { + const now = Date.now(); + const oneWeekAgo = now - (7 * 24 * 60 * 60 * 1000); + + // Mark expired sessions as inactive + const expireStmt = this.db.prepare(` + UPDATE sessions + SET is_active = 0 + WHERE expires_at < ? AND is_active = 1 + `); + const expired = expireStmt.run(now); + + // Delete old inactive sessions (older than 1 week) + const deleteSessionsStmt = this.db.prepare(` + DELETE FROM sessions + WHERE is_active = 0 AND expires_at < ? + `); + const deletedSessions = deleteSessionsStmt.run(oneWeekAgo); + + // Delete orphaned location updates (sessions deleted by CASCADE) + // This is automatic due to CASCADE, but we can also delete old updates + const deleteUpdatesStmt = this.db.prepare(` + DELETE FROM location_updates + WHERE timestamp < ? + `); + const deletedUpdates = deleteUpdatesStmt.run(oneWeekAgo); + + return { + expiredSessions: expired.changes, + deletedSessions: deletedSessions.changes, + deletedUpdates: deletedUpdates.changes + }; + } + + /** + * Setup automatic cleanup + */ + setupCleanup(intervalMinutes = 60) { + setInterval(() => { + const result = this.cleanup(); + console.log('[DB Cleanup]', new Date().toISOString(), result); + }, intervalMinutes * 60 * 1000); + } + + /** + * Get database statistics + */ + getStats() { + const sessionCount = this.db.prepare(` + SELECT COUNT(*) as count FROM sessions WHERE is_active = 1 + `).get(); + + const totalUpdates = this.db.prepare(` + SELECT COUNT(*) as count FROM location_updates + `).get(); + + return { + activeSessions: sessionCount.count, + totalLocationUpdates: totalUpdates.count + }; + } + + close() { + this.db.close(); + } +} + +module.exports = LocationDatabase; diff --git a/webapp/src/server.js b/webapp/src/server.js new file mode 100644 index 000000000..87791cc74 --- /dev/null +++ b/webapp/src/server.js @@ -0,0 +1,274 @@ +require('dotenv').config(); +const express = require('express'); +const cors = require('cors'); +const path = require('path'); +const LocationDatabase = require('./database'); + +const app = express(); +const PORT = process.env.PORT || 3000; + +// Initialize database +const db = new LocationDatabase(process.env.DATABASE_PATH); + +// Middleware +app.use(cors()); +app.use(express.json()); +app.use(express.static(path.join(__dirname, '..', 'public'))); + +// Request logging middleware +app.use((req, res, next) => { + console.log(`[${new Date().toISOString()}] ${req.method} ${req.path}`); + next(); +}); + +/** + * API: Create or reactivate a session + * POST /api/v1/session (Android app format) + * POST /api/sessions (legacy format) + * Body: { sessionId: string } + */ +const createSessionHandler = (req, res) => { + const { sessionId } = req.body; + + if (!sessionId) { + return res.status(400).json({ error: 'sessionId is required' }); + } + + try { + const expiryHours = parseInt(process.env.SESSION_EXPIRY_HOURS) || 24; + const result = db.createSession(sessionId, expiryHours); + res.json(result); + } catch (err) { + console.error('Error creating session:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}; + +app.post('/api/v1/session', createSessionHandler); +app.post('/api/sessions', createSessionHandler); + +/** + * API: Store a location update + * POST /api/v1/location/:sessionId (Android app format - encrypted payload is the entire body) + * Body: encrypted payload JSON directly + */ +app.post('/api/v1/location/:sessionId', (req, res) => { + const { sessionId } = req.params; + + // Android sends the encrypted payload JSON directly as the request body + const encryptedPayload = JSON.stringify(req.body); + + if (!encryptedPayload || encryptedPayload === '{}') { + return res.status(400).json({ error: 'Encrypted payload is required' }); + } + + try { + const result = db.storeLocationUpdate(sessionId, encryptedPayload); + + if (!result.success) { + return res.status(404).json({ error: result.error }); + } + + res.json(result); + } catch (err) { + console.error('Error storing location:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}); + +/** + * API: Store a location update (legacy format) + * POST /api/sessions/:sessionId/location + * Body: { encryptedPayload: string } + */ +app.post('/api/sessions/:sessionId/location', (req, res) => { + const { sessionId } = req.params; + const { encryptedPayload } = req.body; + + if (!encryptedPayload) { + return res.status(400).json({ error: 'encryptedPayload is required' }); + } + + try { + const result = db.storeLocationUpdate(sessionId, encryptedPayload); + + if (!result.success) { + return res.status(404).json({ error: result.error }); + } + + res.json(result); + } catch (err) { + console.error('Error storing location:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}); + +/** + * API: Get session info + * GET /api/v1/session/:sessionId (Android app format) + * GET /api/sessions/:sessionId (legacy format) + */ +const getSessionHandler = (req, res) => { + const { sessionId } = req.params; + + try { + const session = db.getSession(sessionId); + + if (!session) { + return res.status(404).json({ error: 'Session not found' }); + } + + // Don't expose internal fields, just status + res.json({ + sessionId: session.session_id, + isActive: session.is_active === 1, + createdAt: session.created_at, + lastUpdate: session.last_update, + expiresAt: session.expires_at + }); + } catch (err) { + console.error('Error getting session:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}; + +app.get('/api/v1/session/:sessionId', getSessionHandler); +app.get('/api/sessions/:sessionId', getSessionHandler); + +/** + * API: Get latest location for a session + * GET /api/v1/location/:sessionId/latest (Android app format) + * GET /api/sessions/:sessionId/location/latest (legacy format) + */ +const getLatestLocationHandler = (req, res) => { + const { sessionId } = req.params; + + try { + const location = db.getLatestLocation(sessionId); + + if (!location) { + return res.status(404).json({ error: 'No location data found' }); + } + + res.json({ + encryptedPayload: location.encrypted_payload, + timestamp: location.timestamp + }); + } catch (err) { + console.error('Error getting location:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}; + +app.get('/api/v1/location/:sessionId/latest', getLatestLocationHandler); +app.get('/api/sessions/:sessionId/location/latest', getLatestLocationHandler); + +/** + * API: Get location history for a session + * GET /api/sessions/:sessionId/location/history?limit=100 + */ +app.get('/api/sessions/:sessionId/location/history', (req, res) => { + const { sessionId } = req.params; + const limit = parseInt(req.query.limit) || 100; + + try { + const history = db.getLocationHistory(sessionId, limit); + + res.json({ + count: history.length, + updates: history.map(loc => ({ + encryptedPayload: loc.encrypted_payload, + timestamp: loc.timestamp + })) + }); + } catch (err) { + console.error('Error getting history:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}); + +/** + * API: Stop a session + * DELETE /api/v1/session/:sessionId (Android app format) + * DELETE /api/sessions/:sessionId (legacy format) + */ +const deleteSessionHandler = (req, res) => { + const { sessionId } = req.params; + + try { + const result = db.stopSession(sessionId); + + if (!result.success) { + return res.status(404).json({ error: 'Session not found' }); + } + + res.json({ success: true, message: 'Session stopped' }); + } catch (err) { + console.error('Error stopping session:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}; + +app.delete('/api/v1/session/:sessionId', deleteSessionHandler); +app.delete('/api/sessions/:sessionId', deleteSessionHandler); + +/** + * API: Get server statistics + * GET /api/stats + */ +app.get('/api/stats', (req, res) => { + try { + const stats = db.getStats(); + res.json(stats); + } catch (err) { + console.error('Error getting stats:', err); + res.status(500).json({ error: 'Internal server error' }); + } +}); + +/** + * Serve the viewer page for a specific session + * GET /live/:encodedCredentials + */ +app.get('/live/:encodedCredentials', (req, res) => { + res.sendFile(path.join(__dirname, '..', 'public', 'viewer.html')); +}); + +/** + * Health check endpoint + */ +app.get('/health', (req, res) => { + res.json({ status: 'ok', timestamp: Date.now() }); +}); + +// 404 handler +app.use((req, res) => { + res.status(404).json({ error: 'Not found' }); +}); + +// Error handler +app.use((err, req, res, next) => { + console.error('Unhandled error:', err); + res.status(500).json({ error: 'Internal server error' }); +}); + +// Start server +app.listen(PORT, () => { + console.log(`Location sharing server running on port ${PORT}`); + console.log(`Environment: ${process.env.NODE_ENV}`); + console.log(`Database: ${process.env.DATABASE_PATH || 'location_sharing.db'}`); + console.log(`\nServer stats:`, db.getStats()); +}); + +// Graceful shutdown +process.on('SIGINT', () => { + console.log('\nShutting down gracefully...'); + db.close(); + process.exit(0); +}); + +process.on('SIGTERM', () => { + console.log('\nShutting down gracefully...'); + db.close(); + process.exit(0); +});