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

Este es un paquete de pruebas de despliegue en NPM.

import { useEffect, useRef, useState } from 'react';
import { Product, onChangeArgs, InititalValues } from '../interfaces/interfaces';

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

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(initialValues?.count || value);
   }, [value])

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

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