fix: inline small not maintained commonjs library to prevent issues

Author: Loïc Mangeonjean

package-lock.json

@@ -25,7 +25,6 @@
   "dependencies": {
     "@codingame/monaco-languageclient-wrapper": "^5.0.4",
     "@rehooks/local-storage": "^2.4.5",
-    "activity-detector": "^3.0.0",
     "react": ">=18.2.0",
     "uuid": "^9.0.1"
   },

package.json

@@ -1,16 +1,172 @@
 import { useEffect, useState } from 'react'
-import createActivityDetector from 'activity-detector'
+
+enum State {
+  idle = 'idle',
+  active = 'active'
+}
+
+const DEFAULT_INITIAL_STATE = State.active
+
+const DEFAULT_ACTIVITY_EVENTS = [
+  'click',
+  'mousemove',
+  'keydown',
+  'DOMMouseScroll',
+  'mousewheel',
+  'mousedown',
+  'touchstart',
+  'touchmove',
+  'focus'
+]
+
+const DEFAULT_INACTIVITY_EVENTS = ['blur', 'visibilitychange']
+
+const DEFAULT_IGNORED_EVENTS_WHEN_IDLE = ['mousemove']
+
+let hidden: 'hidden' | undefined, visibilityChangeEvent: 'visibilitychange' | undefined
+if (typeof document.hidden !== 'undefined') {
+  hidden = 'hidden'
+  visibilityChangeEvent = 'visibilitychange'
+} else {
+  const prefixes = ['webkit', 'moz', 'ms']
+  for (let i = 0; i < prefixes.length; i++) {
+    const prefix = prefixes[i]
+    if (typeof (document as unknown as Record<string, unknown>)[`${prefix}Hidden`] !== 'undefined') {
+      hidden = `${prefix}Hidden` as 'hidden'
+      visibilityChangeEvent = `${prefix}visibilitychange` as 'visibilitychange'
+      break
+    }
+  }
+}
+
+interface ActivityDetectorParams {
+  /**
+   * Events which force a transition to 'active'
+   */
+  activityEvents?: string[]
+  /**
+   * Events which force a transition to 'idle'
+   */
+  inactivityEvents?: string[]
+  /**
+   * Events that are ignored in 'idle' state
+   */
+  ignoredEventsWhenIdle?: string[]
+  /**
+   * Inactivity time in ms to transition to 'idle'
+   */
+  timeToIdle?: number
+  /**
+   * One of 'active' or 'idle'
+   */
+  initialState?: State
+  autoInit?: boolean
+}
+function createActivityDetector ({
+  activityEvents = DEFAULT_ACTIVITY_EVENTS,
+  inactivityEvents = DEFAULT_INACTIVITY_EVENTS,
+  ignoredEventsWhenIdle = DEFAULT_IGNORED_EVENTS_WHEN_IDLE,
+  timeToIdle = 30000,
+  initialState = DEFAULT_INITIAL_STATE,
+  autoInit = true
+}: ActivityDetectorParams = {}) {
+  const listeners: Record<State, (() => void)[]> = { [State.active]: [], [State.idle]: [] }
+  let state: State
+  let timer: number
+
+  const setState = (newState: State) => {
+    clearTimeout(timer)
+    if (newState === State.active) {
+      timer = window.setTimeout(() => setState(State.idle), timeToIdle)
+    }
+    if (state !== newState) {
+      state = newState
+      listeners[state].forEach(l => l())
+    }
+  }
+
+  const handleUserActivityEvent = (event: Event) => {
+    if (state === State.active || ignoredEventsWhenIdle.indexOf(event.type) < 0) {
+      setState(State.active)
+    }
+  }
+
+  const handleUserInactivityEvent = () => {
+    setState(State.idle)
+  }
+
+  const handleVisibilityChangeEvent = () => {
+    setState(document[hidden!] ? State.idle : State.active)
+  }
+
+  /**
+   * Starts the activity detector with the given state.
+   */
+  const init = (firstState = DEFAULT_INITIAL_STATE) => {
+    setState(firstState === State.active ? State.active : State.idle)
+    activityEvents.forEach(eventName =>
+      window.addEventListener(eventName, handleUserActivityEvent))
+
+    inactivityEvents.filter(eventName => eventName !== 'visibilitychange')
+      .forEach(eventName =>
+        window.addEventListener(eventName, handleUserInactivityEvent))
+
+    if (inactivityEvents.indexOf('visibilitychange') >= 0 && visibilityChangeEvent != null) {
+      document.addEventListener(visibilityChangeEvent, handleVisibilityChangeEvent)
+    }
+  }
+
+  /**
+     * Register an event listener for the required event
+     */
+  const on = (eventName: State, listener: () => void) => {
+    listeners[eventName].push(listener)
+    const off = () => {
+      const index = listeners[eventName].indexOf(listener)
+      if (index >= 0) {
+        listeners[eventName].splice(index, 1)
+      }
+    }
+    return off
+  }
+
+  /**
+     * Stops the activity detector and clean the listeners
+     */
+  const stop = () => {
+    listeners[State.active] = []
+    listeners[State.idle] = []
+
+    clearTimeout(timer)
+
+    activityEvents.forEach(eventName =>
+      window.removeEventListener(eventName, handleUserActivityEvent))
+
+    inactivityEvents.forEach(eventName =>
+      window.removeEventListener(eventName, handleUserInactivityEvent))
+
+    if (visibilityChangeEvent != null) {
+      document.removeEventListener(visibilityChangeEvent, handleVisibilityChangeEvent)
+    }
+  }
+
+  if (autoInit) {
+    init(initialState)
+  }
+
+  return { on, stop, init }
+}
 
 export default function useIsUserActive (timeToIdle: number): boolean {
   const [active, setActive] = useState(true)
   useEffect(() => {
     const activityDetector = createActivityDetector({
       timeToIdle
     })
-    activityDetector.on('idle', () => {
+    activityDetector.on(State.idle, () => {
       setActive(false)
     })
-    activityDetector.on('active', () => {
+    activityDetector.on(State.active, () => {
       setActive(true)
     })
     return () => {