All files / molecules/Accordion/mobile/Components/Molecules AccordionLayout.tsx

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import { useState, useCallback, ReactNode, useEffect } from 'react';
import { View, Text, StyleSheet, LayoutChangeEvent, StyleProp, ViewStyle } from 'react-native';
import { useAccordion } from '../Context/AccordionContext';
import Animated, {
  useSharedValue,
  useAnimatedStyle,
  withTiming,
  Easing,
} from 'react-native-reanimated';
import { Header } from '../Atoms';
import { getDirection, getOrientation, extractTextClasses } from '../Utils';
import type { HorizontalDirection, VerticalDirection } from '../../../Accordion.types';
import { cn } from '@sb/libs';
 
const AnimatedView = Animated.createAnimatedComponent(View);
 
type AccordionLayoutProps = {
  id: string;
  headerClassName?: string;
  contentClassName?: string;
  headerLabel: string | ReactNode;
  headerContent: string | ReactNode;
  content: string | ReactNode;
  footer: string | ReactNode;
  style?: StyleProp<ViewStyle>;
};
 
function AccordionLayout({
  id,
  headerLabel,
  headerContent,
  content,
  footer,
  style,
  headerClassName,
  contentClassName,
}: AccordionLayoutProps) {
  const { headerPosition, isItemOpen } = useAccordion();
  const orientation = getOrientation(headerPosition);
  const direction = getDirection(headerPosition);
  const isExpanded = isItemOpen(id);
 
  // Shared animated values
  const height = useSharedValue(0);
  const opacity = useSharedValue(0);
  const [measuredHeight, setMeasuredHeight] = useState(0);
 
  // Additional measurements for horizontal accordion
  const [fullContentHeight, setFullContentHeight] = useState(0);
 
  // Animate whenever isExpanded or measurement changes
  useEffect(() => {
    let toSize: number;
 
    if (orientation === 'vertical') {
      toSize = isExpanded ? measuredHeight : 0;
    } else {
      // For horizontal: collapsed = 0 (no content/footer), expanded = content + footer height
      toSize = isExpanded ? fullContentHeight : 0;
    }
 
    height.value = withTiming(toSize, {
      duration: 350,
      easing: Easing.inOut(Easing.sin),
    });
    opacity.value =
      orientation === 'vertical'
        ? withTiming(isExpanded ? 1 : 0, {
            duration: 300,
            easing: Easing.linear,
          })
        : 1;
  }, [isExpanded, measuredHeight, fullContentHeight, orientation]);
 
  // Animated styles
  const animatedStyle = useAnimatedStyle(() => ({
    height: height.value,
    opacity: opacity.value,
    overflow: 'hidden',
  }));
 
  // Always capture dimensions (no guard)
  const onContentLayout = useCallback(
    (e: LayoutChangeEvent) => {
      const dimension =
        orientation === 'vertical' ? e.nativeEvent.layout.height : e.nativeEvent.layout.width;
      setMeasuredHeight(dimension);
    },
    [orientation]
  );
 
  const onFullContentLayout = useCallback((e: LayoutChangeEvent) => {
    const newHeight = e.nativeEvent.layout.height;
    setFullContentHeight(newHeight);
  }, []);
 
  // Renders vertical accordion
  const renderVertical = (dir: VerticalDirection) => (
    <View style={[styles.container, style, dir === 'top' ? styles.top : styles.bottom]}>
      <Header id={id} label={headerLabel} className={headerClassName} />
      {/* hidden measurement view always rendered */}
      <View style={styles.hidden} onLayout={onContentLayout}>
        <AccordionItem
          content={headerContent}
          orientation="vertical"
          className={contentClassName}
        />
        <AccordionItem content={content} orientation="vertical" className={contentClassName} />
        <AccordionItem content={footer} orientation="vertical" className={contentClassName} />
      </View>
      <AnimatedView style={animatedStyle}>
        <View>
          <AccordionItem
            content={headerContent}
            orientation="vertical"
            className={contentClassName}
          />
          <AccordionItem content={content} orientation="vertical" className={contentClassName} />
          <AccordionItem content={footer} orientation="vertical" className={contentClassName} />
        </View>
      </AnimatedView>
    </View>
  );
 
  // Renders horizontal accordion
  const renderHorizontal = (dir: HorizontalDirection) => (
    <View style={[styles.container, style]}>
      <View style={[styles.horizontalContent, dir === 'left' ? styles.left : styles.right]}>
        <View style={{ flex: 1 }}>
          {/* Always visible headerContent */}
          <AccordionItem
            content={headerContent}
            orientation="horizontal"
            className={contentClassName}
          />
 
          {/* Hidden measurement view always rendered */}
          <View style={styles.hidden} onLayout={onFullContentLayout}>
            {content ? (
              <AccordionItem
                content={content}
                orientation="horizontal"
                className={contentClassName}
              />
            ) : null}
            {footer ? (
              <AccordionItem
                content={footer}
                orientation="horizontal"
                className={contentClassName}
              />
            ) : null}
          </View>
 
          {/* Animated content and footer */}
          <AnimatedView style={animatedStyle}>
            <View style={{ marginBottom: 0, paddingBottom: 0 }}>
              {content ? (
                <AccordionItem
                  content={content}
                  orientation="horizontal"
                  className={contentClassName}
                />
              ) : null}
              {footer ? (
                <AccordionItem
                  content={footer}
                  orientation="horizontal"
                  className={contentClassName}
                />
              ) : null}
            </View>
          </AnimatedView>
        </View>
        <Header id={id} label={headerLabel} className={headerClassName} />
      </View>
    </View>
  );
 
  return orientation === 'vertical'
    ? renderVertical(direction as VerticalDirection)
    : renderHorizontal(direction as HorizontalDirection);
}
 
export default AccordionLayout;
 
// Simplified styles
const styles = StyleSheet.create({
  container: {},
  top: { flexDirection: 'column' },
  bottom: { flexDirection: 'column-reverse' },
  left: { flexDirection: 'row-reverse' },
  right: { flexDirection: 'row' },
  horizontalContent: { flex: 1 },
  sectionText: {},
  hidden: {
    position: 'absolute',
    top: 0,
    left: 0,
    right: 0,
    width: '100%',
    opacity: 0,
    zIndex: -1,
  },
  horizontalSection: {},
});
 
type AccordionItemProps = {
  content: string | ReactNode;
  orientation: 'horizontal' | 'vertical';
  className?: string;
  onLayout?: (e: LayoutChangeEvent) => void;
};
 
function AccordionItem({ content, orientation, className, onLayout }: AccordionItemProps) {
  const { isFlush } = useAccordion();
  const classNameStyles = cn('p-2', className, {
    'p-0': isFlush,
  });
 
  return (
    <View
      className={classNameStyles}
      style={orientation === 'horizontal' ? styles.horizontalSection : {}}
      onLayout={onLayout}
    >
      {typeof content === 'string' ? (
        <Text
          style={[styles.sectionText]}
          className={cn('text-text-main font-medium', extractTextClasses(className), className)}
        >
          {content}
        </Text>
      ) : (
        content
      )}
    </View>
  );
}