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

This is a test package in order to deploy to NPM.

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

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

export const useProduct = ({
  onChange,
  product,
  value = 0,
  initialValues,
}: UseProductArgs) => {
  const [counter, setCounter] = useState(
    (initialValues && initialValues.count) ?? value
  );
  const isMounted = useRef(false);

  const increaseBy = (value: number) => {
    let newValue: number;
    if (
      initialValues &&
      initialValues.maxCount &&
      counter + value > initialValues.maxCount
    ) {
      newValue = Math.max(initialValues.maxCount, 0);
    } else {
      newValue = Math.max(counter + value, 0);
    }
    setCounter(newValue);

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

  const reset = () =>
    setCounter((initialValues && initialValues.count) ?? value ?? 0);

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

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

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