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App.tsx
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App.tsx
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import React, {useState} from 'react';
import {Image, LayoutChangeEvent, ListRenderItemInfo, StyleSheet, Text, View} from 'react-native';
import Animated, {
Extrapolate,
interpolate,
useAnimatedScrollHandler,
useAnimatedStyle,
useSharedValue,
} from 'react-native-reanimated';
import {FlatList} from 'react-native-gesture-handler';
import {artists, songs} from './data';
import {zip, shuffle} from 'lodash';
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome';
import {faAngleLeft, faArrowDown, faEllipsisV, faPlay, faRedoAlt} from '@fortawesome/free-solid-svg-icons';
import {faHeart} from '@fortawesome/free-regular-svg-icons';
import {SafeAreaInsetsContext, SafeAreaProvider, SafeAreaView} from 'react-native-safe-area-context';
import LinearGradient from 'react-native-linear-gradient';
const AnimatedList = Animated.createAnimatedComponent(FlatList);
type PlaylistItem = {
artist: string;
song: string;
img: string;
};
const data = zip(shuffle(artists), shuffle(songs))
.filter(([l, r]) => !!l && !!r)
.map(([artist, song]) => ({artist, song, img: 'https://picsum.photos/200'} as PlaylistItem));
const RowItem = ({item}: ListRenderItemInfo<PlaylistItem>) => (
<View style={{flexDirection: 'row', alignItems: 'center', padding: 8}}>
<Image source={{uri: item.img}} style={{height: 64, width: 64}} />
<View style={{width: 8}} />
<View style={{flex: 1}}>
<Text style={fonts.bold}>{item.artist}</Text>
<View style={{height: 8}} />
<Text style={fonts.default}>{item.song}</Text>
</View>
<View>
<FontAwesomeIcon style={fonts.bold} icon={faEllipsisV} />
</View>
</View>
);
type HeaderProps = {squeeze: Animated.SharedValue<number>; headerHeight: number};
const Header: React.FC<HeaderProps> = ({squeeze, headerHeight}) => {
const buttonPos = useAnimatedStyle(() => {
return {
position: 'absolute',
top: Math.max(headerHeight - 56 - squeeze.value, 12),
right: 24,
};
});
const opacityStyle = useAnimatedStyle(() => {
return {
opacity: interpolate(squeeze.value, [120, 200], [0, 1], Extrapolate.CLAMP),
};
});
return (
<SafeAreaInsetsContext.Consumer>
{insets => (
<>
<Animated.View style={[{position: 'absolute', top: 0, left: 0, right: 0}, opacityStyle]}>
<LinearGradient colors={['#aaaaaa', '#333333']} style={{alignItems: 'center'}}>
<View style={{height: (insets?.top ?? 0) + 4}}></View>
<Text style={fonts.bold}> Scrollify</Text>
<View style={{height: 12}}></View>
</LinearGradient>
</Animated.View>
<View
style={{
position: 'absolute',
left: 0,
right: 0,
top: insets?.top ?? 0,
flexDirection: 'row',
justifyContent: 'flex-start',
}}>
<View style={{width: 44, marginLeft: 8}}>
<FontAwesomeIcon style={fonts.bold} icon={faAngleLeft} size={24} />
</View>
<Animated.View style={buttonPos}>
<View
style={{
width: 44,
height: 44,
borderRadius: 22,
backgroundColor: '#36D7B7',
alignItems: 'center',
justifyContent: 'center',
}}>
<FontAwesomeIcon color="white" icon={faPlay} size={20} />
</View>
</Animated.View>
</View>
</>
)}
</SafeAreaInsetsContext.Consumer>
);
};
const App = () => {
const squeeze = useSharedValue(0);
const scrollHandler = useAnimatedScrollHandler({
onScroll: ({contentOffset}) => {
squeeze.value = contentOffset.y;
},
});
const [height, setHeight] = useState(0);
const onLayout = ({nativeEvent}: LayoutChangeEvent) => {
setHeight(nativeEvent.layout.height);
};
const ListHeader = () => {
const picStyle = useAnimatedStyle(() => {
if (squeeze.value > 120) return {opacity: 0};
const opacity = interpolate(squeeze.value, [0, 120], [1, 0], Extrapolate.CLAMP);
const scale = interpolate(squeeze.value, [-60, 0, 120], [1.25, 1, 0.5], Extrapolate.CLAMP);
const translateY = interpolate(squeeze.value, [0, 120], [0, 120], Extrapolate.CLAMP);
return {opacity, transform: [{scale}, {translateY}]};
});
return (
<LinearGradient colors={['#aaaaaa', '#333333']}>
<SafeAreaView edges={['top']}>
<View onLayout={onLayout}>
{/* Top Bar height: 196 */}
<View style={{alignItems: 'center'}}>
<Animated.View style={picStyle}>
<View style={{shadowColor: '#ffffff', shadowOpacity: 0.5, shadowRadius: 20}}>
<Image source={{uri: 'https://picsum.photos/300'}} style={{height: 196, width: 196}} />
</View>
</Animated.View>
</View>
{/* Space height: 24 */}
<View style={{height: 24}} />
{/* Info height: ~160 */}
<View style={{padding: 8}}>
<View style={{flexDirection: 'row'}}>
<FontAwesomeIcon icon={faRedoAlt} style={fonts.bold} />
<View style={{width: 4}} />
<Text style={fonts.bold}> Scrollify</Text>
</View>
<View style={{height: 12}} />
<Text style={fonts.default}>1337 Likes • 42 amazescrolls so far</Text>
<View style={{height: 12}} />
<View style={{flexDirection: 'row'}}>
<FontAwesomeIcon style={fonts.default} icon={faHeart} />
<View style={{width: 12}} />
<FontAwesomeIcon style={fonts.default} icon={faArrowDown} />
<View style={{width: 12}} />
<FontAwesomeIcon style={fonts.default} icon={faEllipsisV} />
</View>
</View>
</View>
</SafeAreaView>
</LinearGradient>
);
};
return (
<SafeAreaProvider>
<View style={{backgroundColor: '#aaaaaa'}}>
<AnimatedList
data={data}
keyExtractor={(_, index) => index.toString()}
renderItem={RowItem}
ListHeaderComponent={<ListHeader />}
scrollEventThrottle={16}
contentContainerStyle={{backgroundColor: '#333333'}}
onScroll={scrollHandler}
/>
{height > 0 && <Header squeeze={squeeze} headerHeight={height} />}
</View>
</SafeAreaProvider>
);
};
export default App;
const fonts = StyleSheet.create({
default: {color: '#ffffffaa'},
bold: {color: '#ffffffdd', fontWeight: 'bold'},
});