dz-product-card/src/hooks/useProduct.ts

Este es un paquete de pruebas de despliegue en NPM

import { useEffect, useRef, useState } from "react"
import { InitialValues, Product, onChangeArgs } from "../interfaces/interfaces";

interface useProductArgs {
    product: Product;
    onChange?: ( args: onChangeArgs ) => void;
    value?: number;
    initialValues?: InitialValues;
}

export const useProduct = ( { onChange, product, value = 0, initialValues }: useProductArgs) => {

    const [counter, setCounter] = useState<number>( initialValues?.count || value );
    const isMounted = useRef(false);

    const increaseBy = ( value:number ) =>{

        let newValue = Math.max( counter + value, 0);
        if (initialValues?.maxCount) {
            newValue = Math.min( newValue, initialValues.maxCount );
        }

        setCounter( newValue )
        onChange && onChange({ count: newValue, product });
    }

    const reset = () => {
        setCounter(initialValues?.count || value )
    }

    useEffect(() => {
        if ( !isMounted.current ) return; 
        
        setCounter(value)
    }, [value])

    // useEffect(() => {
    //     isMounted.current = false;
    // }, [])
    
    return {
        counter, 
        isMaxCountReached: !!initialValues?.count && initialValues.maxCount === counter,
        maxCount: initialValues?.maxCount,

        increaseBy: increaseBy,
        reset
    }
}