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* Remote Camera Session Manager
*
* Manages sessions for phone-to-desktop camera streaming.
* Uses Redis when REDIS_URL is set (production), falls back to in-memory (dev).
* Sessions have a 60-minute TTL but are renewed on activity.
*/
import { createId } from '@paralleldrive/cuid2'
import { getRedisClient } from '../redis'
export interface RemoteCameraSession {
id: string
createdAt: string // ISO string for JSON serialization
expiresAt: string
lastActivityAt: string
phoneConnected: boolean
/** Calibration data sent from desktop (persists for reconnects) */
calibration?: {
corners: {
topLeft: { x: number; y: number }
topRight: { x: number; y: number }
bottomLeft: { x: number; y: number }
bottomRight: { x: number; y: number }
}
columnCount?: number
}
}
// In-memory session storage (fallback when Redis not available)
// Using globalThis to persist across hot reloads in development
declare global {
// eslint-disable-next-line no-var
var __remoteCameraSessions: Map<string, RemoteCameraSession> | undefined
// eslint-disable-next-line no-var
var __remoteCameraCleanupStarted: boolean | undefined
}
const SESSION_TTL_MS = 60 * 60 * 1000 // 60 minutes
const SESSION_TTL_SECONDS = 60 * 60 // 60 minutes (for Redis)
const CLEANUP_INTERVAL_MS = 60 * 1000 // 1 minute
const REDIS_KEY_PREFIX = 'remote-camera:session:'
function getMemorySessions(): Map<string, RemoteCameraSession> {
if (!globalThis.__remoteCameraSessions) {
globalThis.__remoteCameraSessions = new Map()
// Start cleanup interval only once
if (!globalThis.__remoteCameraCleanupStarted) {
globalThis.__remoteCameraCleanupStarted = true
setInterval(cleanupExpiredMemorySessions, CLEANUP_INTERVAL_MS)
}
}
return globalThis.__remoteCameraSessions
}
function cleanupExpiredMemorySessions(): void {
const sessions = getMemorySessions()
const now = new Date().toISOString()
for (const [id, session] of sessions) {
if (now > session.expiresAt) {
sessions.delete(id)
}
}
}
/**
* Create a new remote camera session
*/
export async function createRemoteCameraSession(): Promise<RemoteCameraSession> {
const now = new Date()
const expiresAt = new Date(now.getTime() + SESSION_TTL_MS)
const session: RemoteCameraSession = {
id: createId(),
createdAt: now.toISOString(),
expiresAt: expiresAt.toISOString(),
lastActivityAt: now.toISOString(),
phoneConnected: false,
}
const redis = getRedisClient()
if (redis) {
await redis.setex(REDIS_KEY_PREFIX + session.id, SESSION_TTL_SECONDS, JSON.stringify(session))
console.log(`[SessionManager] Created session ${session.id} in Redis`)
} else {
getMemorySessions().set(session.id, session)
console.log(`[SessionManager] Created session ${session.id} in memory`)
}
return session
}
/**
* Get or create a session by ID
* If the session exists and isn't expired, returns it (renewed)
* If the session doesn't exist, creates a new one with the given ID
*/
export async function getOrCreateSession(sessionId: string): Promise<RemoteCameraSession> {
const existing = await getRemoteCameraSession(sessionId)
if (existing) {
// Renew TTL on access
await renewSessionTTL(sessionId)
return existing
}
// Create new session with provided ID
const now = new Date()
const expiresAt = new Date(now.getTime() + SESSION_TTL_MS)
const session: RemoteCameraSession = {
id: sessionId,
createdAt: now.toISOString(),
expiresAt: expiresAt.toISOString(),
lastActivityAt: now.toISOString(),
phoneConnected: false,
}
const redis = getRedisClient()
if (redis) {
await redis.setex(REDIS_KEY_PREFIX + session.id, SESSION_TTL_SECONDS, JSON.stringify(session))
} else {
getMemorySessions().set(session.id, session)
}
return session
}
/**
* Renew session TTL (call on activity to keep session alive)
*/
export async function renewSessionTTL(sessionId: string): Promise<boolean> {
const redis = getRedisClient()
if (redis) {
const data = await redis.get(REDIS_KEY_PREFIX + sessionId)
if (!data) return false
const session: RemoteCameraSession = JSON.parse(data)
const now = new Date()
session.expiresAt = new Date(now.getTime() + SESSION_TTL_MS).toISOString()
session.lastActivityAt = now.toISOString()
await redis.setex(REDIS_KEY_PREFIX + sessionId, SESSION_TTL_SECONDS, JSON.stringify(session))
return true
}
const sessions = getMemorySessions()
const session = sessions.get(sessionId)
if (!session) return false
const now = new Date()
session.expiresAt = new Date(now.getTime() + SESSION_TTL_MS).toISOString()
session.lastActivityAt = now.toISOString()
return true
}
/**
* Store calibration data in session (persists for reconnects)
*/
export async function setSessionCalibration(
sessionId: string,
calibration: RemoteCameraSession['calibration']
): Promise<boolean> {
const redis = getRedisClient()
if (redis) {
const data = await redis.get(REDIS_KEY_PREFIX + sessionId)
if (!data) return false
const session: RemoteCameraSession = JSON.parse(data)
session.calibration = calibration
const now = new Date()
session.expiresAt = new Date(now.getTime() + SESSION_TTL_MS).toISOString()
session.lastActivityAt = now.toISOString()
await redis.setex(REDIS_KEY_PREFIX + sessionId, SESSION_TTL_SECONDS, JSON.stringify(session))
return true
}
const sessions = getMemorySessions()
const session = sessions.get(sessionId)
if (!session) return false
session.calibration = calibration
const now = new Date()
session.expiresAt = new Date(now.getTime() + SESSION_TTL_MS).toISOString()
session.lastActivityAt = now.toISOString()
return true
}
/**
* Get calibration data from session
*/
export async function getSessionCalibration(
sessionId: string
): Promise<RemoteCameraSession['calibration'] | null> {
const session = await getRemoteCameraSession(sessionId)
if (!session) return null
return session.calibration || null
}
/**
* Get a session by ID
*/
export async function getRemoteCameraSession(
sessionId: string
): Promise<RemoteCameraSession | null> {
const redis = getRedisClient()
if (redis) {
const data = await redis.get(REDIS_KEY_PREFIX + sessionId)
if (!data) return null
const session: RemoteCameraSession = JSON.parse(data)
// Check if expired (Redis TTL should handle this, but double-check)
if (new Date().toISOString() > session.expiresAt) {
await redis.del(REDIS_KEY_PREFIX + sessionId)
return null
}
return session
}
const sessions = getMemorySessions()
const session = sessions.get(sessionId)
if (!session) return null
// Check if expired
if (new Date().toISOString() > session.expiresAt) {
sessions.delete(sessionId)
return null
}
return session
}
/**
* Mark a session as having a connected phone
*/
export async function markPhoneConnected(sessionId: string): Promise<boolean> {
const redis = getRedisClient()
if (redis) {
const data = await redis.get(REDIS_KEY_PREFIX + sessionId)
if (!data) return false
const session: RemoteCameraSession = JSON.parse(data)
session.phoneConnected = true
session.expiresAt = new Date(Date.now() + SESSION_TTL_MS).toISOString()
await redis.setex(REDIS_KEY_PREFIX + sessionId, SESSION_TTL_SECONDS, JSON.stringify(session))
return true
}
const sessions = getMemorySessions()
const session = sessions.get(sessionId)
if (!session) return false
session.phoneConnected = true
session.expiresAt = new Date(Date.now() + SESSION_TTL_MS).toISOString()
return true
}
/**
* Mark a session as having the phone disconnected
*/
export async function markPhoneDisconnected(sessionId: string): Promise<boolean> {
const redis = getRedisClient()
if (redis) {
const data = await redis.get(REDIS_KEY_PREFIX + sessionId)
if (!data) return false
const session: RemoteCameraSession = JSON.parse(data)
session.phoneConnected = false
await redis.setex(REDIS_KEY_PREFIX + sessionId, SESSION_TTL_SECONDS, JSON.stringify(session))
return true
}
const sessions = getMemorySessions()
const session = sessions.get(sessionId)
if (!session) return false
session.phoneConnected = false
return true
}
/**
* Delete a session
*/
export async function deleteRemoteCameraSession(sessionId: string): Promise<boolean> {
const redis = getRedisClient()
if (redis) {
const result = await redis.del(REDIS_KEY_PREFIX + sessionId)
return result > 0
}
return getMemorySessions().delete(sessionId)
}
/**
* Get session count (for debugging)
*/
export async function getSessionCount(): Promise<number> {
const redis = getRedisClient()
if (redis) {
const keys = await redis.keys(REDIS_KEY_PREFIX + '*')
return keys.length
}
return getMemorySessions().size
}
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