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277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 | 'use client' import { useCallback, useEffect, useRef, useState } from 'react' import { DESK_VIEW_PATTERNS } from '@/types/vision' export interface UseDeskViewCameraReturn { /** Whether camera is currently loading */ isLoading: boolean /** Error message if camera failed */ error: string | null /** Active video stream */ videoStream: MediaStream | null /** Currently selected device */ currentDevice: MediaDeviceInfo | null /** All available video input devices */ availableDevices: MediaDeviceInfo[] /** Whether Desk View camera was auto-detected */ isDeskViewDetected: boolean /** Current facing mode */ facingMode: 'user' | 'environment' /** Whether torch is currently on */ isTorchOn: boolean /** Whether torch is available on current device */ isTorchAvailable: boolean /** Request camera access, optionally specifying device ID */ requestCamera: (deviceId?: string) => Promise<void> /** Stop camera stream */ stopCamera: () => void /** Refresh device list */ enumerateDevices: () => Promise<MediaDeviceInfo[]> /** Flip between front and back camera */ flipCamera: () => Promise<void> /** Toggle torch on/off */ toggleTorch: () => Promise<void> } /** * Hook for managing camera access with Desk View auto-detection * * Prioritizes finding Apple's "Desk View" camera (via Continuity Camera), * but falls back to manual device selection if not available. */ export function useDeskViewCamera(): UseDeskViewCameraReturn { const [isLoading, setIsLoading] = useState(false) const [error, setError] = useState<string | null>(null) const [videoStream, setVideoStream] = useState<MediaStream | null>(null) const [currentDevice, setCurrentDevice] = useState<MediaDeviceInfo | null>(null) const [availableDevices, setAvailableDevices] = useState<MediaDeviceInfo[]>([]) const [isDeskViewDetected, setIsDeskViewDetected] = useState(false) const [facingMode, setFacingMode] = useState<'user' | 'environment'>('environment') const [isTorchOn, setIsTorchOn] = useState(false) const [isTorchAvailable, setIsTorchAvailable] = useState(false) const streamRef = useRef<MediaStream | null>(null) const requestIdRef = useRef(0) // Track request ID to ignore stale completions const facingModeRef = useRef<'user' | 'environment'>('environment') /** * Enumerate available video input devices */ const enumerateDevices = useCallback(async (): Promise<MediaDeviceInfo[]> => { try { const devices = await navigator.mediaDevices.enumerateDevices() const videoInputs = devices.filter((d) => d.kind === 'videoinput') setAvailableDevices(videoInputs) return videoInputs } catch (err) { console.error('Failed to enumerate devices:', err) return [] } }, []) /** * Check if a device label matches Desk View patterns */ const isDeskViewDevice = useCallback((device: MediaDeviceInfo): boolean => { const label = device.label.toLowerCase() return DESK_VIEW_PATTERNS.some((pattern) => label.includes(pattern)) }, []) /** * Find Desk View camera from device list */ const findDeskViewCamera = useCallback( (devices: MediaDeviceInfo[]): MediaDeviceInfo | null => { for (const device of devices) { if (isDeskViewDevice(device)) { return device } } return null }, [isDeskViewDevice] ) /** * Check if torch is available on a video track */ const checkTorchAvailability = useCallback((track: MediaStreamTrack): boolean => { try { const capabilities = track.getCapabilities() as MediaTrackCapabilities & { torch?: boolean } return capabilities.torch === true } catch { return false } }, []) /** * Apply torch setting to track */ const applyTorch = useCallback(async (track: MediaStreamTrack, on: boolean): Promise<boolean> => { try { await track.applyConstraints({ advanced: [{ torch: on } as MediaTrackConstraintSet], }) return true } catch (err) { console.warn('[DeskViewCamera] Failed to apply torch:', err) return false } }, []) /** * Request camera access */ const requestCamera = useCallback( async (deviceId?: string): Promise<void> => { const thisRequestId = ++requestIdRef.current setIsLoading(true) setError(null) try { // Stop any existing stream if (streamRef.current) { for (const track of streamRef.current.getTracks()) { track.stop() } streamRef.current = null } const devices = await enumerateDevices() // Check if this request is still the latest if (thisRequestId !== requestIdRef.current) return // If no deviceId specified, try to find Desk View let targetDeviceId = deviceId if (!targetDeviceId) { const deskViewDevice = findDeskViewCamera(devices) if (deskViewDevice) { targetDeviceId = deskViewDevice.deviceId setIsDeskViewDetected(true) } else { setIsDeskViewDetected(false) } } const constraints: MediaStreamConstraints = { video: { width: { ideal: 1920 }, height: { ideal: 1440 }, // Prefer widest angle lens (zoom: 1 = no zoom = widest) // @ts-expect-error - zoom is valid but not in TS types zoom: { ideal: 1 }, // Try to disable face-tracking auto-focus (not all cameras support this) focusMode: 'continuous', ...(targetDeviceId ? { deviceId: { exact: targetDeviceId } } : { facingMode: { ideal: facingModeRef.current } }), }, audio: false, } const stream = await navigator.mediaDevices.getUserMedia(constraints) // Check again if this request is still the latest if (thisRequestId !== requestIdRef.current) { for (const track of stream.getTracks()) { track.stop() } return } streamRef.current = stream setVideoStream(stream) // Find which device we got and check torch availability const videoTrack = stream.getVideoTracks()[0] if (videoTrack) { const settings = videoTrack.getSettings() const matchingDevice = devices.find((d) => d.deviceId === settings.deviceId) if (matchingDevice) { setCurrentDevice(matchingDevice) setIsDeskViewDetected(isDeskViewDevice(matchingDevice)) } // Check torch availability const torchAvailable = checkTorchAvailability(videoTrack) setIsTorchAvailable(torchAvailable) setIsTorchOn(false) } setIsLoading(false) } catch (err) { console.error('[DeskViewCamera] Failed to access camera:', err) setError(err instanceof Error ? err.message : 'Failed to access camera') setIsLoading(false) } }, [enumerateDevices, findDeskViewCamera, isDeskViewDevice, checkTorchAvailability] ) /** * Stop the camera stream */ const stopCamera = useCallback(() => { requestIdRef.current++ if (streamRef.current) { for (const track of streamRef.current.getTracks()) { track.stop() } streamRef.current = null } setVideoStream(null) setCurrentDevice(null) setError(null) setIsTorchOn(false) setIsTorchAvailable(false) }, []) // Cleanup on unmount useEffect(() => { return () => { if (streamRef.current) { for (const track of streamRef.current.getTracks()) { track.stop() } } } }, []) // Listen for device changes (e.g., iPhone connected/disconnected) useEffect(() => { // Guard against SSR or unsupported environments if (typeof navigator === 'undefined' || !navigator.mediaDevices) { return } const handleDeviceChange = () => { enumerateDevices() } navigator.mediaDevices.addEventListener('devicechange', handleDeviceChange) return () => { navigator.mediaDevices.removeEventListener('devicechange', handleDeviceChange) } }, [enumerateDevices]) /** * Flip between front and back camera */ const flipCamera = useCallback(async () => { const newFacingMode = facingMode === 'user' ? 'environment' : 'user' facingModeRef.current = newFacingMode setFacingMode(newFacingMode) // Re-request camera with new facing mode (don't pass device ID to use facingMode) await requestCamera() }, [facingMode, requestCamera]) /** * Toggle torch on/off */ const toggleTorch = useCallback(async () => { if (!streamRef.current || !isTorchAvailable) return const videoTrack = streamRef.current.getVideoTracks()[0] if (!videoTrack) return const newState = !isTorchOn const success = await applyTorch(videoTrack, newState) if (success) { setIsTorchOn(newState) } }, [isTorchAvailable, isTorchOn, applyTorch]) return { isLoading, error, videoStream, currentDevice, availableDevices, isDeskViewDetected, facingMode, isTorchOn, isTorchAvailable, requestCamera, stopCamera, enumerateDevices, flipCamera, toggleTorch, } } |