@andrescs/ac-product-card/src/hooks/useProduct.ts

Este es un paquete de pruebas de despliegue de NPM.

import { useEffect, useRef, useState } from "react";
import { InitialValues, onChangeArgs, Product } 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)

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

    useEffect(() => {
        isMounted.current = true;
    }, [])

    const increaseBy = (value:number) => {
        let newValue = Math.max(counter + value, 0);
        
        if (initialValues?.maxCount) {
            newValue = Math.min(newValue, initialValues.maxCount);
        }
        //if (initialValues?.maxCount && newValue>initialValues?.maxCount) return;
        setCounter(newValue)
        onChange && onChange({count: newValue, product});
    }

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

    return {
        counter,
        increaseBy,
        isMaxCountReached: !!initialValues?.maxCount && initialValues.maxCount===counter,
        maxCount: initialValues?.maxCount,
        reset
    }
}