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import React from 'react'
import {View} from 'react-native'
import Animated, {
Easing,
LayoutAnimationConfig,
useReducedMotion,
withTiming,
} from 'react-native-reanimated'
import {decideShouldRoll} from '#/lib/custom-animations/util'
import {s} from '#/lib/styles'
import {Text} from '#/view/com/util/text/Text'
import {atoms as a, useTheme} from '#/alf'
import {useFormatPostStatCount} from '#/components/PostControls/util'
const animationConfig = {
duration: 400,
easing: Easing.out(Easing.cubic),
}
function EnteringUp() {
'worklet'
const animations = {
opacity: withTiming(1, animationConfig),
transform: [{translateY: withTiming(0, animationConfig)}],
}
const initialValues = {
opacity: 0,
transform: [{translateY: 18}],
}
return {
animations,
initialValues,
}
}
function EnteringDown() {
'worklet'
const animations = {
opacity: withTiming(1, animationConfig),
transform: [{translateY: withTiming(0, animationConfig)}],
}
const initialValues = {
opacity: 0,
transform: [{translateY: -18}],
}
return {
animations,
initialValues,
}
}
function ExitingUp() {
'worklet'
const animations = {
opacity: withTiming(0, animationConfig),
transform: [
{
translateY: withTiming(-18, animationConfig),
},
],
}
const initialValues = {
opacity: 1,
transform: [{translateY: 0}],
}
return {
animations,
initialValues,
}
}
function ExitingDown() {
'worklet'
const animations = {
opacity: withTiming(0, animationConfig),
transform: [{translateY: withTiming(18, animationConfig)}],
}
const initialValues = {
opacity: 1,
transform: [{translateY: 0}],
}
return {
animations,
initialValues,
}
}
export function CountWheel({
likeCount,
big,
isLiked,
hasBeenToggled,
}: {
likeCount: number
big?: boolean
isLiked: boolean
hasBeenToggled: boolean
}) {
const t = useTheme()
const shouldAnimate = !useReducedMotion() && hasBeenToggled
const shouldRoll = decideShouldRoll(isLiked, likeCount)
// Incrementing the key will cause the `Animated.View` to re-render, with the newly selected entering/exiting
// animation
// The initial entering/exiting animations will get skipped, since these will happen on screen mounts and would
// be unnecessary
const [key, setKey] = React.useState(0)
const [prevCount, setPrevCount] = React.useState(likeCount)
const prevIsLiked = React.useRef(isLiked)
const formatPostStatCount = useFormatPostStatCount()
const formattedCount = formatPostStatCount(likeCount)
const formattedPrevCount = formatPostStatCount(prevCount)
React.useEffect(() => {
if (isLiked === prevIsLiked.current) {
return
}
const newPrevCount = isLiked ? likeCount - 1 : likeCount + 1
setKey(prev => prev + 1)
setPrevCount(newPrevCount)
prevIsLiked.current = isLiked
}, [isLiked, likeCount])
const enteringAnimation =
shouldAnimate && shouldRoll
? isLiked
? EnteringUp
: EnteringDown
: undefined
const exitingAnimation =
shouldAnimate && shouldRoll
? isLiked
? ExitingUp
: ExitingDown
: undefined
return (
<LayoutAnimationConfig skipEntering skipExiting>
{likeCount > 0 ? (
<View style={[a.justify_center]}>
<Animated.View entering={enteringAnimation} key={key}>
<Text
testID="likeCount"
style={[
big ? a.text_md : a.text_sm,
a.user_select_none,
isLiked
? [a.font_bold, s.likeColor]
: {color: t.palette.contrast_500},
]}>
{formattedCount}
</Text>
</Animated.View>
{shouldAnimate && (likeCount > 1 || !isLiked) ? (
<Animated.View
entering={exitingAnimation}
// Add 2 to the key so there are never duplicates
key={key + 2}
style={[a.absolute, {width: 50, opacity: 0}]}
aria-disabled={true}>
<Text
style={[
big ? a.text_md : a.text_sm,
a.user_select_none,
isLiked
? [a.font_bold, s.likeColor]
: {color: t.palette.contrast_500},
]}>
{formattedPrevCount}
</Text>
</Animated.View>
) : null}
</View>
) : null}
</LayoutAnimationConfig>
)
}
|
