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import { useCallback, useState } from 'react'
interface RemoteCameraSession {
sessionId: string
expiresAt: string
phoneConnected?: boolean
}
interface UseRemoteCameraSessionReturn {
/** Current session data */
session: RemoteCameraSession | null
/** Whether a session is being created or validated */
isCreating: boolean
/** Error message if session creation failed */
error: string | null
/** Create a new remote camera session */
createSession: () => Promise<RemoteCameraSession | null>
/** Validate and set an existing session ID (returns true if valid, false if expired) */
validateAndSetSession: (sessionId: string) => Promise<boolean>
/** Clear the current session */
clearSession: () => void
/** Get the URL for the phone to scan */
getPhoneUrl: () => string | null
}
/**
* Hook for managing remote camera sessions
*
* Used by the desktop to create sessions and generate QR codes
* for phones to scan.
*/
export function useRemoteCameraSession(): UseRemoteCameraSessionReturn {
const [session, setSession] = useState<RemoteCameraSession | null>(null)
const [isCreating, setIsCreating] = useState(false)
const [error, setError] = useState<string | null>(null)
const createSession = useCallback(async (): Promise<RemoteCameraSession | null> => {
setIsCreating(true)
setError(null)
try {
const response = await fetch('/api/remote-camera', {
method: 'POST',
})
if (!response.ok) {
const data = await response.json()
throw new Error(data.error || 'Failed to create session')
}
const data = await response.json()
const newSession: RemoteCameraSession = {
sessionId: data.sessionId,
expiresAt: data.expiresAt,
phoneConnected: false,
}
setSession(newSession)
return newSession
} catch (err) {
const message = err instanceof Error ? err.message : 'Failed to create session'
setError(message)
console.error('Failed to create remote camera session:', err)
return null
} finally {
setIsCreating(false)
}
}, [])
const validateAndSetSession = useCallback(async (sessionId: string): Promise<boolean> => {
// Validate the session exists on the server before using it
// This prevents using stale session IDs from localStorage after server restart or expiration
setIsCreating(true)
setError(null)
try {
const response = await fetch(`/api/remote-camera?sessionId=${encodeURIComponent(sessionId)}`)
if (response.ok) {
const data = await response.json()
setSession({
sessionId: data.sessionId,
expiresAt: data.expiresAt,
phoneConnected: data.phoneConnected ?? false,
})
return true
} else {
// Session expired or invalid - caller should create a new one
console.log(
'[useRemoteCameraSession] Session validation failed, session expired or invalid'
)
return false
}
} catch (err) {
console.error('[useRemoteCameraSession] Failed to validate session:', err)
return false
} finally {
setIsCreating(false)
}
}, [])
const clearSession = useCallback(() => {
setSession(null)
setError(null)
}, [])
const getPhoneUrl = useCallback((): string | null => {
if (!session) return null
// Get the base URL - prefer LAN host for phone access
if (typeof window === 'undefined') return null
// Use NEXT_PUBLIC_LAN_HOST if set, otherwise construct from current location
// This allows phones on the same network to reach the server
let baseUrl: string
const lanHost = process.env.NEXT_PUBLIC_LAN_HOST
if (lanHost) {
// If just hostname/IP provided, use current protocol and port
if (lanHost.includes('://')) {
baseUrl = lanHost
} else {
const port = window.location.port ? `:${window.location.port}` : ''
baseUrl = `${window.location.protocol}//${lanHost}${port}`
}
} else {
// Fallback: replace localhost with local IP if possible
const hostname = window.location.hostname
if (hostname === 'localhost' || hostname === '127.0.0.1') {
// Try to use the page's own hostname as-is (might already be LAN address)
// For true localhost, user needs to set NEXT_PUBLIC_LAN_HOST
baseUrl = window.location.origin
} else {
// Already using a non-localhost address (e.g., LAN IP, domain)
baseUrl = window.location.origin
}
}
return `${baseUrl}/remote-camera/${session.sessionId}`
}, [session])
return {
session,
isCreating,
error,
createSession,
validateAndSetSession,
clearSession,
getPhoneUrl,
}
}
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