solution

src/App.tsx

@@ -1,16 +1,26 @@
+import { useState } from 'react';
 import './App.scss';
 import { MoviesList } from './components/MoviesList';
 import { NewMovie } from './components/NewMovie';
 import moviesFromServer from './api/movies.json';
+import { Movie } from './types/Movie';
 
 export const App = () => {
+  const [movies, setMovies] = useState<Movie[]>(moviesFromServer);
+
+  const addMovies = (newMovie: Movie) => {
+    setMovies(prewMovies => [...prewMovies, newMovie]);
+  };
+
   return (
     <div className="page">
       <div className="page-content">
-        <MoviesList movies={moviesFromServer} />
+        <MoviesList movies={movies} />
       </div>
       <div className="sidebar">
-        <NewMovie /* onAdd={(movie) => {}} */ />
+        <NewMovie
+          onAdd={addMovies}
+        />
       </div>
     </div>
   );

src/components/NewMovie/NewMovie.tsx

@@ -1,53 +1,127 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
+import cn from 'classnames';
 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);
+// eslint-disable-next-line max-len
+const pattern = /^((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=+$,\w]+@)?[A-Za-z0-9.-]+|(?:www\.|[-;:&=+$,\w]+@)[A-Za-z0-9.-]+)((?:\/[+~%/.\w-_]*)?\??(?:[-+=&;%@,.\w_]*)#?(?:[,.!/\\\w]*))?)$/;
+
+type Props = {
+  onAdd: (post: Movie) => void;
+};
+
+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 [isFormValid, setIsFormValid] = useState(false);
+
+  const reset = () => {
+    setCount(0);
+    setTitle('');
+    setDescription('');
+    setImgUrl('');
+    setImdbUrl('');
+    setImdbId('');
+    setIsFormValid(false);
+  };
+
+  const correctImgUrl = pattern.test(imgUrl);
+  const correctimdbUrl = pattern.test(imdbUrl);
+
+  const isValid
+  = !!title && pattern.test(imgUrl) && pattern.test(imdbUrl) && !!imdbId;
+
+  const handleInputChange = (
+    setter: React.Dispatch<React.SetStateAction<string>>, value: string,
+  ) => {
+    setter(value);
+
+    setIsFormValid(isFormValid);
+  };
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    const newMovie: Movie = {
+      title,
+      description,
+      imgUrl,
+      imdbUrl,
+      imdbId,
+    };
+
+    onAdd(newMovie);
+    setCount(count + 1);
+  };
+
+  useEffect(() => {
+    if (count > 0) {
+      reset();
+    }
+  }, [count]);
 
   return (
-    <form className="NewMovie" key={count}>
+    <form
+      className="NewMovie"
+      key={count}
+      onSubmit={handleSubmit}
+    >
       <h2 className="title">Add a movie</h2>
 
       <TextField
         name="title"
         label="Title"
-        value=""
-        onChange={() => {}}
+        value={title}
+        onChange={(value) => handleInputChange(setTitle, value)}
         required
       />
 
       <TextField
         name="description"
         label="Description"
-        value=""
+        value={description}
+        onChange={(value) => handleInputChange(setDescription, value)}
       />
 
       <TextField
         name="imgUrl"
         label="Image URL"
-        value=""
+        value={imgUrl}
+        onChange={(value) => handleInputChange(setImgUrl, value)}
+        isValid={correctImgUrl}
+        required
       />
 
       <TextField
         name="imdbUrl"
         label="Imdb URL"
-        value=""
+        value={imdbUrl}
+        onChange={(value) => handleInputChange(setImdbUrl, value)}
+        isValid={correctimdbUrl}
+        required
       />
 
       <TextField
         name="imdbId"
         label="Imdb ID"
-        value=""
+        value={imdbId}
+        onChange={(value) => handleInputChange(setImdbId, value)}
+        required
       />
 
       <div className="field is-grouped">
         <div className="control">
           <button
             type="submit"
             data-cy="submit-button"
-            className="button is-link"
+            className={cn('button', 'is-link', {
+              'is-disabled': !isFormValid,
+            })}
+            disabled={!isValid}
           >
             Add
           </button>

src/components/TextField/TextField.tsx

@@ -8,10 +8,11 @@ type Props = {
   placeholder?: string,
   required?: boolean,
   onChange?: (newValue: string) => void,
+  isValid?: boolean,
 };
 
 function getRandomDigits() {
-  return Math.random()
+  return +Math.random()
     .toFixed(16)
     .slice(2);
 }
@@ -23,13 +24,19 @@ export const TextField: React.FC<Props> = ({
   placeholder = `Enter ${label}`,
   required = false,
   onChange = () => {},
+  isValid = true,
 }) => {
   // generage a unique id once on component load
   const [id] = useState(() => `${name}-${getRandomDigits()}`);
 
   // To show errors only if the field was touched (onBlur)
   const [touched, setTouched] = useState(false);
-  const hasError = touched && required && !value;
+  const hasError = (touched && required && !value.trim())
+  || (!isValid && touched && required);
+
+  const handleTouchedChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    onChange(event.target.value);
+  };
 
   return (
     <div className="field">
@@ -47,8 +54,8 @@ export const TextField: React.FC<Props> = ({
           })}
           placeholder={placeholder}
           value={value}
-          onChange={event => onChange(event.target.value)}
-          onBlur={() => setTouched(true)}
+          onChange={handleTouchedChange}
+          onBlur={() => setTouched((prev) => !prev)}
         />
       </div>