NEW! WAKE LOCK API SUPPORT!

src/mineflayer/timers.ts

@@ -1,9 +1,66 @@
+import { subscribeKey } from 'valtio/utils'
 import { preventThrottlingWithSound } from '../core/timers'
 import { options } from '../optionsStorage'
 
 customEvents.on('mineflayerBotCreated', () => {
-  if (options.preventBackgroundTimeoutKick) {
-    const unsub = preventThrottlingWithSound()
-    bot.on('end', unsub)
+  const abortController = new AbortController()
+
+  const maybeGoBackgroundKickPrevention = () => {
+    if (options.preventBackgroundTimeoutKick && !bot.backgroundKickPrevention) {
+      const unsub = preventThrottlingWithSound()
+      bot.on('end', unsub)
+      bot.backgroundKickPrevention = true
+    }
   }
+  maybeGoBackgroundKickPrevention()
+  subscribeKey(options, 'preventBackgroundTimeoutKick', (value) => {
+    maybeGoBackgroundKickPrevention()
+  })
+
+  // wake lock
+  const requestWakeLock = async () => {
+    if (options.preventSleep && !bot.wakeLock && !bot.lockRequested) {
+      bot.lockRequested = true
+      bot.wakeLock = await navigator.wakeLock.request('screen').finally(() => {
+        bot.lockRequested = false
+      })
+
+      bot.wakeLock.addEventListener('release', () => {
+        bot.wakeLock = undefined
+      }, {
+        once: true,
+      })
+    }
+
+    if (!options.preventSleep && bot.wakeLock) {
+      void bot.wakeLock.release()
+    }
+  }
+  document.addEventListener('visibilitychange', () => {
+    if (document.visibilityState === 'visible') {
+      // we are back to the tab, request wake lock again
+      void requestWakeLock()
+    }
+  }, {
+    signal: abortController.signal,
+  })
+  void requestWakeLock()
+  subscribeKey(options, 'preventSleep', (value) => {
+    void requestWakeLock()
+  })
+
+  bot.on('end', () => {
+    if (bot.wakeLock) {
+      void bot.wakeLock.release()
+    }
+    abortController.abort()
+  })
 })
+
+declare module 'mineflayer' {
+  interface Bot {
+    backgroundKickPrevention?: boolean
+    wakeLock?: WakeLockSentinel
+    lockRequested?: boolean
+  }
+}

src/optionsGuiScheme.tsx

@@ -526,7 +526,11 @@ export const guiOptionsScheme: {
       },
     },
     {
-      preventBackgroundTimeoutKick: {}
+      preventBackgroundTimeoutKick: {},
+      preventSleep: {
+        disabledReason: navigator.wakeLock ? undefined : 'Your browser does not support wake lock API',
+        enableWarning: 'When connected to a server, prevent PC from sleeping or screen dimming. Useful for purpusely staying AFK for long time. Some events might still prevent this like loosing tab focus or going low power mode.',
+      },
     },
     {
       custom () {

src/react/IndicatorEffects.tsx

@@ -46,7 +46,8 @@ export const defaultIndicatorsState = {
   readonlyFiles: false,
   writingFiles: false, // saving
   appHasErrors: false,
-  connectionIssues: 0
+  connectionIssues: 0,
+  preventSleep: false,
 }
 
 const indicatorIcons: Record<keyof typeof defaultIndicatorsState, string> = {
@@ -56,6 +57,7 @@ const indicatorIcons: Record<keyof typeof defaultIndicatorsState, string> = {
   appHasErrors: 'alert',
   readonlyFiles: 'file-off',
   connectionIssues: pixelartIcons['cellular-signal-off'],
+  preventSleep: pixelartIcons.moon,
 }
 
 const colorOverrides = {

src/react/IndicatorEffectsProvider.tsx

@@ -1,5 +1,5 @@
 import { proxy, subscribe, useSnapshot } from 'valtio'
-import { useEffect, useMemo } from 'react'
+import { useEffect, useMemo, useState } from 'react'
 import { subscribeKey } from 'valtio/utils'
 import { inGameError } from '../utils'
 import { fsState } from '../loadSave'
@@ -51,6 +51,7 @@ const getEffectIndex = (newEffect: EffectType) => {
 }
 
 export default () => {
+  const [dummyState, setDummyState] = useState(false)
   const stateIndicators = useSnapshot(state.indicators)
   const chunksLoading = !useSnapshot(appViewer.rendererState).world.allChunksLoaded
   const { mesherWork } = useSnapshot(appViewer.rendererState).world
@@ -66,12 +67,21 @@ export default () => {
     appHasErrors: hasErrors,
     connectionIssues: poorConnection ? 1 : noConnection ? 2 : 0,
     chunksLoading,
+    preventSleep: !!bot.wakeLock,
     // mesherWork,
     ...stateIndicators,
   }
 
   const effects = useSnapshot(state.effects)
 
+  useEffect(() => {
+    // update bot related states
+    const interval = setInterval(() => {
+      setDummyState(s => !s)
+    }, 1000)
+    return () => clearInterval(interval)
+  }, [])
+
   useMemo(() => {
     const effectsImages = Object.fromEntries(loadedData.effectsArray.map((effect) => {
       const nameKebab = effect.name.replaceAll(/[A-Z]/g, (letter) => `_${letter.toLowerCase()}`).slice(1)