React Pro - Real World App - Ch9. 18. useCloudinary - custom hook e Promise

import clsx from 'clsx';
import { ChangeEvent, FormEvent, useEffect, useState } from 'react';
import { Product } from '@/model/product';
import { useCloudinary } from '../../../../shared/hooks/useCloudinary';

declare var cloudinary: any;

export interface CMSProductFormProps {
  activeItem: Partial<Product> | null;
  onClose: () => void;
  onAdd: (product: Partial<Product>) => void;
  onEdit: (product: Partial<Product>) => void;
}

const initialState: Partial<Product> = {
  name: '', cost: 0, description: '', tmb: '', img: ''
}

export function CMSProductForm(props: CMSProductFormProps) {
  const [formData, setFormData] = useState(initialState);
  const [dirty, setDirty] = useState<boolean>(false);

  const { openWidget } = useCloudinary();

  useEffect(() => {
    if (props.activeItem?.id) {
      setFormData({ ...props.activeItem })
    } else {
      setFormData(initialState)
    }
  }, [props.activeItem])

  function changeHandler(e: ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) {
    const value = e.currentTarget.value;
    const name = e.currentTarget.name;
    setFormData(s => ({ ...s, [name]: value }));
    setDirty(true);
  }

  function saveHandler(e: FormEvent<HTMLFormElement>) {
    e.preventDefault();
    if (props.activeItem?.id) {
      props.onEdit(formData);
    } else {
      props.onAdd(formData);
    }
  }

  function uploadHandler() {
    openWidget()
      .then(res => {
        setFormData(s => ({ ...s, ...res }))
      })

  }

  const isNameValid = formData.name?.length;
  const isCostValid = formData.cost! > 0;
  const isDescValid = formData.description?.length;

  const isValid = isNameValid && isCostValid && isDescValid;

  return (
    <div className={clsx(
      'fixed bg-slate-200 z-10 text-black top-0 w-96  h-full transition-all overflow-auto',
      {'-right-96': !props.activeItem, 'right-0': props.activeItem}
    )}>

      <form onSubmit={saveHandler}>
        <div className="flex justify-around h-16">
          <button
            className="text-white w-1/2 bg-green-500 hover:bg-green-600 disabled:opacity-30"
            disabled={!isValid}
            type="submit"
          >SAVE</button>
          <button
            className="text-white w-1/2 bg-slate-500 hover:bg-slate-600"
            onClick={props.onClose}
            type="button"
          >CLOSE</button>
        </div>

        {
          formData.img &&
          <img src={formData.img} alt={formData.name} className="w-full" />
        }

        <div className="flex flex-col gap-3 mx-3 mt-16">
          Product Name:
          <input
            className={clsx({ 'error': !isNameValid && dirty})}
            type="text" value={formData?.name} name="name" onChange={changeHandler}
          />

          Product Cost:
          <input
            className={clsx({ 'error': !isCostValid && dirty})}
            type="number" value={formData?.cost} name="cost" onChange={changeHandler}
          />

          Description
          <textarea
            className={clsx({ 'error': !isDescValid && dirty})}
            value={formData.description} name="description" onChange={changeHandler}
          ></textarea>

          <button className="btn primary" type="button" onClick={uploadHandler}>
            UPLOAD IMAGE
          </button>
        </div>
      </form>

      <pre>{JSON.stringify(formData, null, 2)}</pre>


    </div>
  )
}