@attio/react-native-bottom-sheet-toolbox/dist/module/hooks/use-last-shared-value-before-lock.js

"use strict";

import { useAnimatedReaction, useSharedValue } from "react-native-reanimated";
import { useBottomSheetToolboxInternalContext } from "../context";
import { useLastSharedValue } from "./use-last-shared-value";

/**
 * Returns a shared value holding the last value seen of the input shared value
 * prior to a current position lock being engaged.
 */
export function useLastSharedValueBeforeLock(sharedValue) {
  const {
    currentPositionLockSharedValue
  } = useBottomSheetToolboxInternalContext();
  const lastSharedValue = useLastSharedValue(sharedValue);
  const sharedValueBeforeLock = useSharedValue(null);
  useAnimatedReaction(() => currentPositionLockSharedValue.get(), (currentPositionLock, lastCurrentPositionLock) => {
    const didJustLock = currentPositionLock !== null && currentPositionLock !== lastCurrentPositionLock;
    if (didJustLock) {
      const lastValue = lastSharedValue.get();
      sharedValueBeforeLock.set(lastValue);
    } else {
      sharedValueBeforeLock.set(null);

      /**
       * When a lock ends take most recent value.
       */
      lastSharedValue.set(sharedValue.get());
    }
  }, [currentPositionLockSharedValue.get]);
  return sharedValueBeforeLock;
}
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