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#03.1: Compound components (with callback) #4

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#03.1: Compound components (with callback) #4

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29 changes: 24 additions & 5 deletions showcase/src/patterns/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ import React, {
useEffect,
useContext,
useMemo,
useRef,
createContext
} from 'react'

Expand Down Expand Up @@ -117,7 +118,7 @@ const initialState = {
const MediumClapContext = createContext()
const { Provider } = MediumClapContext

const MediumClap = ({ children }) => {
const MediumClap = ({ children, onClap }) => {
const MAXIMUM_USER_CLAP = 50
const [clapState, setClapState] = useState(initialState)
const { count, countTotal, isClicked } = clapState
Expand All @@ -134,6 +135,18 @@ const MediumClap = ({ children }) => {
})
}

const componentJustMounted = useRef(true)

useEffect(
() => {
if (!componentJustMounted.current) {
onClap(clapState)
}
componentJustMounted.current = false
},
[count, onClap]
)

const memoizedValue = useMemo(
() => ({
count,
Expand Down Expand Up @@ -190,11 +203,11 @@ const CountTotal = () => {
)
}

const ClapInfo = () => {
const ClapInfo = ({ info }) => {
const { countTotal } = useContext(MediumClapContext)
return (
<div className={styles.info}>
{wordConverter.toWords(countTotal)} claps!
{info || wordConverter.toWords(countTotal)} claps!
</div>
)
}
Expand All @@ -211,12 +224,18 @@ MediumClap.Info = ClapInfo
==================================== **/

const Usage = () => {
const [total, setTotal] = useState(0)

const onClap = ({ countTotal }) => {
setTotal(countTotal)
}

return (
<MediumClap>
<MediumClap onClap={onClap}>
<MediumClap.Icon />
<MediumClap.Total />
<MediumClap.Count />
<MediumClap.Info />
<MediumClap.Info info={`Your article has been clapped ${total} times`} />
</MediumClap>
)
}
Expand Down