Solution

src/App.tsx

@@ -2,15 +2,23 @@ import './App.scss';
 import { MoviesList } from './components/MoviesList';
 import { NewMovie } from './components/NewMovie';
 import moviesFromServer from './api/movies.json';
+import { useState } from 'react';
+import { Movie } from './types/Movie';
 
 export const App = () => {
+  const [movies, setMovies] = useState(moviesFromServer);
+
+  const addNewMovie = (newMovie: Movie) => {
+    setMovies(currentMovies => [...currentMovies, newMovie]);
+  };
+
   return (
     <div className="page">
       <div className="page-content">
-        <MoviesList movies={moviesFromServer} />
+        <MoviesList movies={movies} />
       </div>
       <div className="sidebar">
-        <NewMovie /* onAdd={(movie) => {}} */ />
+        <NewMovie onAdd={addNewMovie} />
       </div>
     </div>
   );

src/components/NewMovie/NewMovie.tsx

@@ -1,37 +1,117 @@
-import { useState } from 'react';
+import React, { useState } from 'react';
 import { TextField } from '../TextField';
+import { Movie } from '../../types/Movie';
 
-export const NewMovie = () => {
-  // Increase the count after successful form submission
-  // to reset touched status of all the `Field`s
-  const [count] = useState(0);
+interface Props {
+  onAdd: (movie: Movie) => void;
+}
+
+enum Fields {
+  title = 'Title',
+  description = 'Description',
+  imgUrl = 'Image URL',
+  imdbUrl = 'Imdb URL',
+  imdbId = 'Imdb ID',
+}
+
+const isValid = (value: string): boolean => {
+  return value.trim().length > 0;
+};
+
+export const NewMovie: React.FC<Props> = ({ onAdd }) => {
+  const [count, setCount] = useState(0);
+  const [title, setTitle] = useState('');
+  const [description, setDescription] = useState('');
+  const [imgUrl, setImgUrl] = useState('');
+  const [imdbUrl, setImdbUrl] = useState('');
+  const [imdbId, setImdbId] = useState('');
+
+  const reset = () => {
+    setCount(0);
+    setTitle('');
+    setDescription('');
+    setImgUrl('');
+    setImdbUrl('');
+    setImdbId('');
+  };
+
+  const handleFormSubmit = (event: React.FormEvent): void => {
+    event.preventDefault();
+
+    const newMovie = {
+      title: title.trim(),
+      description: description.trim(),
+      imgUrl: imgUrl.trim(),
+      imdbUrl: imdbUrl.trim(),
+      imdbId: imdbId.trim(),
+    };
+
+    onAdd(newMovie);
+
+    setCount(count + 1);
+    reset();
+  };
 
   return (
-    <form className="NewMovie" key={count}>
+    <form
+      className="NewMovie"
+      key={count}
+      onSubmit={handleFormSubmit}
+      onReset={reset}
+    >
       <h2 className="title">Add a movie</h2>
 
       <TextField
         name="title"
-        label="Title"
-        value=""
-        onChange={() => {}}
+        label={Fields.title}
+        value={title}
+        onChange={event => setTitle(event.target.value)}
         required
       />
 
-      <TextField name="description" label="Description" value="" />
+      <TextField
+        name="description"
+        label={Fields.description}
+        value={description}
+        onChange={event => setDescription(event.target.value)}
+      />
 
-      <TextField name="imgUrl" label="Image URL" value="" />
+      <TextField
+        name="imgUrl"
+        label={Fields.imgUrl}
+        value={imgUrl}
+        onChange={event => setImgUrl(event.target.value)}
+        required
+      />
 
-      <TextField name="imdbUrl" label="Imdb URL" value="" />
+      <TextField
+        name="imdbUrl"
+        label={Fields.imdbUrl}
+        value={imdbUrl}
+        onChange={event => setImdbUrl(event.target.value)}
+        required
+      />
 
-      <TextField name="imdbId" label="Imdb ID" value="" />
+      <TextField
+        name="imdbId"
+        label={Fields.imdbId}
+        value={imdbId}
+        onChange={event => setImdbId(event.target.value)}
+        required
+      />
 
       <div className="field is-grouped">
         <div className="control">
           <button
             type="submit"
             data-cy="submit-button"
             className="button is-link"
+            disabled={
+              !isValid(title) ||
+              !isValid(imgUrl) ||
+              !isValid(imdbUrl) ||
+              !isValid(imdbId)
+            }
           >
             Add
           </button>

src/components/TextField/TextField.tsx

@@ -1,13 +1,13 @@
 import classNames from 'classnames';
-import React, { useState } from 'react';
+import React, { ChangeEvent, useState } from 'react';
 
 type Props = {
   name: string;
   value: string;
   label?: string;
   placeholder?: string;
   required?: boolean;
-  onChange?: (newValue: string) => void;
+  onChange?: (newValue: ChangeEvent<HTMLInputElement>) => void;
 };
 
 function getRandomDigits() {
@@ -45,7 +45,7 @@ export const TextField: React.FC<Props> = ({
           })}
           placeholder={placeholder}
           value={value}
-          onChange={event => onChange(event.target.value)}
+          onChange={event => onChange(event)}
           onBlur={() => setTouched(true)}
         />
       </div>