Dynamic Island

import React, {  createContext,  useContext,  useState,  useCallback,  useMemo,  useId,  useEffect,  memo,} from "react";import { StyleSheet, View, Pressable, ViewStyle, AppState } from "react-native";import Animated, {  useSharedValue,  useAnimatedStyle,  withTiming,  Easing,  useAnimatedProps,  interpolate,  withSpring,} from "react-native-reanimated";import { setStatusBarHidden } from "expo-status-bar";import { impactAsync, ImpactFeedbackStyle } from "expo-haptics";import { BlurView, BlurViewProps } from "expo-blur";import type {  IContent,  IDynamicIslandConfig,  IDynamicIslandContext,  IProvider,  ISlotRegistry,  ITrigger,  SlotType,} from "./types";import { DEFAULT_CONFIG } from "./conf";const AnimatedBlurView =  Animated.createAnimatedComponent<BlurViewProps>(BlurView);const DynamicIslandContext: React.Context<IDynamicIslandContext | null> =  createContext<IDynamicIslandContext | null>(null);export const useDynamicIsland = (): {  isExpanded: boolean;  expand: () => void;  collapse: () => void;  toggle: () => void;} => {  const context: IDynamicIslandContext | null =    useContext(DynamicIslandContext);  if (context === null) {    throw new Error(      "useDynamicIsland must be used within DynamicIsland.Provider",    );  }  return {    isExpanded: context.isExpanded,    expand: context.expand,    collapse: context.collapse,    toggle: context.toggle,  };};export const DynamicIslandProvider: React.FC<  React.PropsWithChildren<IProvider>> = memo<IProvider>(  ({    children,    config: configProp,    theme,    onExpand,    onCollapse,    haptics = true,    style,  }: React.PropsWithChildren<IProvider>): React.ReactNode & JSX.Element => {    const config: IDynamicIslandConfig = useMemo<IDynamicIslandConfig>(      () => ({        ...DEFAULT_CONFIG,        ...configProp,        theme: theme ?? DEFAULT_CONFIG.theme,      }),      [configProp, theme],    );    const [isExpanded, setIsExpanded] = useState<boolean>(false);    const [slots, setSlots] = useState<ISlotRegistry>({      trigger: new Map<string, React.ReactNode>(),      content: new Map<string, React.ReactNode>(),    });    const progress = useSharedValue<number>(0);    const activeAppState = useSharedValue<number>(1);    const registerSlot = useCallback<IDynamicIslandContext["registerSlot"]>(      (type: SlotType, id: string, node: React.ReactNode): void => {        setSlots((prev) => {          const next = new Map(prev[type]);          next.set(id, node);          return { ...prev, [type]: next };        });      },      [],    );    const unregisterSlot = useCallback<IDynamicIslandContext["unregisterSlot"]>(      (type: SlotType, id: string): void => {        setSlots((prev) => {          const next = new Map(prev[type]);          next.delete(id);          return { ...prev, [type]: next };        });      },      [],    );    const triggerContent: React.ReactNode | null =      useMemo<React.ReactNode | null>(() => {        const values = Array.from(slots.trigger.values());        return values[values.length - 1] ?? null;      }, [slots.trigger]);    const expandedContent: React.ReactNode | null =      useMemo<React.ReactNode | null>(() => {        const values = Array.from(slots.content.values());        return values[values.length - 1] ?? null;      }, [slots.content]);    const animateTo = useCallback<(expanded: boolean) => void>(      (expanded: boolean): void => {        progress.value = withTiming(expanded ? 1 : 0, {          duration: config.duration,          easing: Easing.bezier(0.25, 0.1, 0.25, 1),        });        setStatusBarHidden(expanded, "slide");      },      [config.duration, progress],    );    const expand = useCallback((): void => {      setIsExpanded(true);      animateTo(true);      if (haptics) {        impactAsync(ImpactFeedbackStyle.Medium);      }      onExpand?.();    }, [animateTo, haptics, onExpand]);    const collapse = useCallback((): void => {      setIsExpanded(false);      animateTo(false);      if (haptics) {        impactAsync(ImpactFeedbackStyle.Light);      }      onCollapse?.();    }, [animateTo, haptics, onCollapse]);    const toggle = useCallback((): void => {      setIsExpanded((prev) => {        const next = !prev;        animateTo(next);        if (haptics) {          impactAsync(            next ? ImpactFeedbackStyle.Medium : ImpactFeedbackStyle.Light,          );        }        next ? onExpand?.() : onCollapse?.();        return next;      });    }, [animateTo, haptics, onExpand, onCollapse]);    const islandStyle = useAnimatedStyle<ViewStyle>(() => ({      width:        config.collapsedWidth +        (config.expandedWidth - config.collapsedWidth) * progress.value,      height:        config.collapsedHeight +        (config.expandedHeight - config.collapsedHeight) * progress.value,    }));    const triggerStyle = useAnimatedStyle<ViewStyle>(() => ({      opacity: interpolate(progress.value, [0, 0.6, 1], [1, 0, 0]),      transform: [        { scale: interpolate(progress.value, [0, 1], [1, 0.6]) },        { translateY: interpolate(progress.value, [0, 1], [0, -20]) },      ],    }));    const contentStyle = useAnimatedStyle<ViewStyle>(() => ({      opacity: interpolate(progress.value, [0, 0.4, 1], [0, 0, 1]),      transform: [        { scale: interpolate(progress.value, [0.5, 1], [0.6, 1]) },        { translateY: interpolate(progress.value, [0, 1], [100, 0]) },      ],    }));    const contextValue: IDynamicIslandContext = useMemo<IDynamicIslandContext>(      () => ({        isExpanded,        expand,        collapse,        toggle,        registerSlot,        unregisterSlot,      }),      [isExpanded, expand, collapse, toggle, registerSlot, unregisterSlot],    );    const animatedBlurProps = useAnimatedProps<BlurViewProps>(() => ({      intensity: withSpring(        interpolate(progress.value, [0, 0.4, 0.8, 1], [10.5, 25.5, 45.5, 0]),      ),    }));    const animatedStylez = useAnimatedStyle<ViewStyle>(() => ({      opacity: interpolate(activeAppState.value, [1, 0], [1, 0]),    }));    useEffect(() => {      const subscription = AppState.addEventListener("change", (state) => {        if (state === "active") {          console.log("active");          activeAppState.value = withTiming(1, { duration: 300 });        } else {          console.log("inactive");          activeAppState.value = withTiming(0, { duration: 300 });        }      });      return () => subscription.remove();    }, []);    return (      <DynamicIslandContext.Provider value={contextValue}>        <Animated.View          style={[styles.container, { top: config.topOffset }, animatedStylez]}          pointerEvents="box-none"        >          <Pressable onPress={toggle}>            <Animated.View              style={[                styles.island,                {                  backgroundColor: config.theme.backgroundColor,                  borderRadius: config.theme.borderRadius,                },                islandStyle,                style,              ]}            >              <Animated.View style={[styles.slot, triggerStyle]}>                {triggerContent}              </Animated.View>              <Animated.View                style={[styles.slot, styles.expandedSlot, contentStyle]}              >                {expandedContent}              </Animated.View>              <AnimatedBlurView                animatedProps={animatedBlurProps}                tint="dark"                style={[                  StyleSheet.absoluteFill,                  {                    overflow: "hidden",                    borderRadius: config.theme.borderRadius,                  },                ]}              />            </Animated.View>          </Pressable>        </Animated.View>        {children}      </DynamicIslandContext.Provider>    );  },);export const DynamicIslandTrigger: React.FC<ITrigger> = memo(  ({ children, style }: ITrigger): (React.ReactNode & JSX.Element) | null => {    const context = useContext(DynamicIslandContext);    const id: string = useId();    if (context === null) {      throw new Error(        "DynamicIsland.Trigger must be used within DynamicIsland.Provider",      );    }    useEffect(() => {      const node: React.ReactNode = style ? (        <View style={style}>{children}</View>      ) : (        children      );      context.registerSlot<"trigger", typeof id, typeof node>(        "trigger",        id,        node,      );      return () => {        context.unregisterSlot<"trigger", typeof id>("trigger", id);      };    }, [id, children, style, context]);    return null;  },);export const DynamicIslandContent: React.FC<IContent> = memo(  ({ children, style }: IContent): (React.ReactNode & JSX.Element) | null => {    const context = useContext(DynamicIslandContext);    const id: string = useId();    if (context === null) {      throw new Error(        "DynamicIsland.Content must be used within DynamicIsland.Provider",      );    }    useEffect(() => {      const node: React.ReactNode = (        <View style={[styles.contentInner, style]}>{children}</View>      );      context.registerSlot<"content", typeof id, typeof node>(        "content",        id,        node,      );      return () => {        context.unregisterSlot<"content", typeof id>("content", id);      };    }, [id, children, style, context]);    return null;  },);export const DynamicIsland: {  Provider: React.FC<React.PropsWithChildren<IProvider>>;  Trigger: React.FC<ITrigger>;  Content: React.FC<IContent>;} = {  Provider: DynamicIslandProvider,  Trigger: DynamicIslandTrigger,  Content: DynamicIslandContent,};const styles = StyleSheet.create({  container: {    position: "absolute",    left: 0,    right: 0,    alignItems: "center",    zIndex: 9999,  },  island: {    justifyContent: "center",    alignItems: "center",    overflow: "hidden",  },  slot: {    position: "absolute",    justifyContent: "center",    alignItems: "center",  },  expandedSlot: {    width: "100%",    height: "100%",    padding: 16,  },  contentInner: {    width: "100%",    height: "100%",    justifyContent: "center",    alignItems: "center",  },});