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* useUserActivity — tracks typing, scrolling, mouse, idle, battery, network,\n * orientation, visibility. Ported from agi-diy/context-injector.js.\n */\nimport { useEffect, useRef, useState } from 'react'\n\nexport interface UserActivityState {\n isActive: boolean\n isTyping: boolean\n isScrolling: boolean\n isMovingMouse: boolean\n idleSeconds: number\n mousePosition: { x: number; y: number }\n scrollPosition: { x: number; y: number }\n focusedElement: string | null\n visibilityState: 'visible' | 'hidden' | 'prerender' | 'unloaded'\n windowFocused: boolean\n screenSize: { width: number; height: number }\n touchDevice: boolean\n batteryLevel: number | null\n batteryCharging: boolean | null\n networkType: string | null\n networkDownlink: number | null\n orientation: { alpha: number; beta: number; gamma: number } | null\n}\n\nconst initial: UserActivityState = {\n isActive: true, isTyping: false, isScrolling: false, isMovingMouse: false,\n idleSeconds: 0,\n mousePosition: { x: 0, y: 0 },\n scrollPosition: { x: 0, y: 0 },\n focusedElement: null,\n visibilityState: typeof document !== 'undefined' ? document.visibilityState : 'visible',\n windowFocused: typeof document !== 'undefined' ? document.hasFocus() : true,\n screenSize: typeof window !== 'undefined' ? { width: window.innerWidth, height: window.innerHeight } : { width: 0, height: 0 },\n touchDevice: typeof window !== 'undefined' && 'ontouchstart' in window,\n batteryLevel: null, batteryCharging: null,\n networkType: null, networkDownlink: null,\n orientation: null,\n}\n\nexport function useUserActivity(enabled = true): UserActivityState {\n const [state, setState] = useState(initial)\n const lastActivityRef = useRef(Date.now())\n const timersRef = useRef | undefined>>({})\n\n useEffect(() => {\n if (!enabled) return\n const update = (patch: Partial) => {\n setState(prev => ({ ...prev, ...patch }))\n }\n const touchActivity = () => { lastActivityRef.current = Date.now() }\n const debounce = (key: string, fn: () => void, ms: number) => {\n clearTimeout(timersRef.current[key])\n timersRef.current[key] = setTimeout(fn, ms)\n }\n\n const onMouse = (e: MouseEvent) => {\n update({ mousePosition: { x: e.clientX, y: e.clientY }, isMovingMouse: true })\n touchActivity()\n debounce('mouse', () => setState(s => ({ ...s, isMovingMouse: false })), 500)\n }\n const onKey = () => {\n update({ isTyping: true })\n touchActivity()\n debounce('type', () => setState(s => ({ ...s, isTyping: false })), 1000)\n }\n const onScroll = () => {\n update({ scrollPosition: { x: window.scrollX, y: window.scrollY }, isScrolling: true })\n touchActivity()\n debounce('scroll', () => setState(s => ({ ...s, isScrolling: false })), 500)\n }\n const onClick = () => touchActivity()\n const onTouch = () => touchActivity()\n const onFocusIn = (e: FocusEvent) => {\n const target = e.target as HTMLElement\n update({ focusedElement: target?.tagName?.toLowerCase() || null })\n touchActivity()\n }\n const onVis = () => update({ visibilityState: document.visibilityState })\n const onFocus = () => { update({ windowFocused: true }); touchActivity() }\n const onBlur = () => update({ windowFocused: false })\n const onResize = () => update({ screenSize: { width: window.innerWidth, height: window.innerHeight } })\n const onOrient = (e: DeviceOrientationEvent) => {\n update({ orientation: { alpha: Math.round(e.alpha || 0), beta: Math.round(e.beta || 0), gamma: Math.round(e.gamma || 0) } })\n }\n\n document.addEventListener('mousemove', onMouse, { passive: true })\n document.addEventListener('keydown', onKey, { passive: true })\n window.addEventListener('scroll', onScroll, { passive: true })\n document.addEventListener('click', onClick, { passive: true })\n document.addEventListener('touchstart', onTouch, { passive: true })\n document.addEventListener('focusin', onFocusIn, { passive: true })\n document.addEventListener('visibilitychange', onVis)\n window.addEventListener('focus', onFocus)\n window.addEventListener('blur', onBlur)\n window.addEventListener('resize', onResize, { passive: true })\n window.addEventListener('deviceorientation', onOrient, { passive: true })\n\n // Battery (tracked for cleanup)\n interface BatteryManager {\n level: number\n charging: boolean\n addEventListener(event: string, cb: () => void): void\n removeEventListener(event: string, cb: () => void): void\n }\n interface NetInfo {\n effectiveType?: string\n downlink?: number\n addEventListener(event: string, cb: () => void): void\n removeEventListener(event: string, cb: () => void): void\n }\n const nav = navigator as Navigator & {\n getBattery?: () => Promise\n connection?: NetInfo\n }\n let batteryRef: BatteryManager | null = null\n const onBatteryLevel = () => batteryRef && update({ batteryLevel: Math.round(batteryRef.level * 100) })\n const onBatteryCharging = () => batteryRef && update({ batteryCharging: batteryRef.charging })\n nav.getBattery?.().then((battery: BatteryManager) => {\n batteryRef = battery\n update({ batteryLevel: Math.round(battery.level * 100), batteryCharging: battery.charging })\n battery.addEventListener('levelchange', onBatteryLevel)\n battery.addEventListener('chargingchange', onBatteryCharging)\n }).catch(() => {})\n\n // Network (tracked for cleanup)\n const conn = nav.connection\n const onConn = () => conn && update({ networkType: conn.effectiveType, networkDownlink: conn.downlink })\n if (conn) {\n update({ networkType: conn.effectiveType, networkDownlink: conn.downlink })\n conn.addEventListener('change', onConn)\n }\n\n // Idle ticker\n const idleInterval = setInterval(() => {\n const idleSeconds = Math.round((Date.now() - lastActivityRef.current) / 1000)\n setState(s => ({ ...s, idleSeconds, isActive: idleSeconds < 30 }))\n }, 1000)\n\n return () => {\n document.removeEventListener('mousemove', onMouse)\n document.removeEventListener('keydown', onKey)\n window.removeEventListener('scroll', onScroll)\n document.removeEventListener('click', onClick)\n document.removeEventListener('touchstart', onTouch)\n document.removeEventListener('focusin', onFocusIn)\n document.removeEventListener('visibilitychange', onVis)\n window.removeEventListener('focus', onFocus)\n window.removeEventListener('blur', onBlur)\n window.removeEventListener('resize', onResize)\n window.removeEventListener('deviceorientation', onOrient)\n clearInterval(idleInterval)\n Object.values(timersRef.current).forEach(clearTimeout)\n if (batteryRef) {\n batteryRef.removeEventListener('levelchange', onBatteryLevel)\n batteryRef.removeEventListener('chargingchange', onBatteryCharging)\n }\n if (conn) conn.removeEventListener('change', onConn)\n }\n }, [enabled])\n\n return state\n}\n\n/** Format for system prompt injection. */\nexport function activityToContextString(s: UserActivityState): string {\n const lines: string[] = ['### User Activity']\n lines.push(`- Active: ${s.isActive ? 'yes' : 'no'} (idle ${s.idleSeconds}s)`)\n const actions = [\n s.isTyping && 'typing', s.isScrolling && 'scrolling', s.isMovingMouse && 'moving mouse',\n ].filter(Boolean).join(', ')\n if (actions) lines.push(`- Doing: ${actions}`)\n lines.push(`- Window: ${s.windowFocused ? 'focused' : 'unfocused'}, ${s.visibilityState}`)\n lines.push(`- Screen: ${s.screenSize.width}×${s.screenSize.height}${s.touchDevice ? ' (touch)' : ''}`)\n if (s.batteryLevel !== null) lines.push(`- Battery: ${s.batteryLevel}%${s.batteryCharging ? ' charging' : ''}`)\n if (s.networkType) lines.push(`- Network: ${s.networkType}${s.networkDownlink ? ` (${s.networkDownlink}Mbps)` : ''}`)\n if (s.orientation) lines.push(`- Orient: α${s.orientation.alpha}° β${s.orientation.beta}° γ${s.orientation.gamma}°`)\n return lines.join('\\n')\n}\n"]}