add task solution

src/App.tsx

@@ -1,61 +1,114 @@
+import React, { useState } from 'react';
 import './App.scss';
+import { TodoList } from './components/TodoList';
+import usersFromServer from './api/users';
+import todosFromServer from './api/todos';
 
-// import usersFromServer from './api/users';
-// import todosFromServer from './api/todos';
+type User = {
+  id: number;
+  name: string;
+  email: string;
+  username: string;
+};
+
+type Todo = {
+  id: number;
+  title: string;
+  completed: boolean;
+  user: User | null;
+};
+
+function getUserById(userId: number): User | null {
+  return usersFromServer.find(user => user.id === userId) || null;
+}
+
+const initialTodos: Todo[] = todosFromServer.map(todo => ({
+  ...todo,
+  user: getUserById(todo.userId),
+}));
+
+export const App: React.FC = () => {
+  const [title, setTitle] = useState('');
+  const [userId, setUserId] = useState(0);
+  const [hasTitleError, setHasTitleError] = useState(false);
+  const [hasSelectError, setHasSelectError] = useState(false);
+  const [todos, setTodos] = useState<Todo[]>(initialTodos);
+
+  const handleTitleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setTitle(event.target.value);
+    setHasTitleError(false);
+  };
+
+  const handleSelectChange = (event: React.ChangeEvent<HTMLSelectElement>) => {
+    setUserId(+event.target.value);
+    setHasSelectError(false);
+  };
+
+  const handelSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    setHasTitleError(!title);
+    setHasSelectError(!userId);
+
+    if (!title || !userId) {
+      return;
+    }
+
+    const newTodo: Todo = {
+      id: todos.length + 1,
+      title,
+      completed: false,
+      user: getUserById(userId),
+    };
+
+    setTodos(currentTodos => [...currentTodos, newTodo]);
+    setTitle('');
+    setUserId(0);
+  };
 
-export const App = () => {
   return (
     <div className="App">
       <h1>Add todo form</h1>
 
-      <form action="/api/todos" method="POST">
+      <form action="/api/todos" method="POST" onSubmit={handelSubmit}>
         <div className="field">
-          <input type="text" data-cy="titleInput" />
-          <span className="error">Please enter a title</span>
+          Title:
+          <input
+            type="text"
+            data-cy="titleInput"
+            placeholder="Enter a title"
+            value={title}
+            onChange={handleTitleChange}
+          />
+          {hasTitleError && <span className="error">Please enter a title</span>}
         </div>
 
         <div className="field">
-          <select data-cy="userSelect">
+          User:
+          <select
+            data-cy="userSelect"
+            value={userId}
+            onChange={handleSelectChange}
+          >
             <option value="0" disabled>
               Choose a user
             </option>
+            {usersFromServer.map(user => (
+              <option value={user.id} key={user.id}>
+                {user.name}
+              </option>
+            ))}
           </select>
-
-          <span className="error">Please choose a user</span>
+          {hasSelectError && (
+            <span className="error">Please choose a user</span>
+          )}
         </div>
 
         <button type="submit" data-cy="submitButton">
           Add
         </button>
       </form>
-
-      <section className="TodoList">
-        <article data-id="1" className="TodoInfo TodoInfo--completed">
-          <h2 className="TodoInfo__title">delectus aut autem</h2>
-
-          <a className="UserInfo" href="mailto:Sincere@april.biz">
-            Leanne Graham
-          </a>
-        </article>
-
-        <article data-id="15" className="TodoInfo TodoInfo--completed">
-          <h2 className="TodoInfo__title">delectus aut autem</h2>
-
-          <a className="UserInfo" href="mailto:Sincere@april.biz">
-            Leanne Graham
-          </a>
-        </article>
-
-        <article data-id="2" className="TodoInfo">
-          <h2 className="TodoInfo__title">
-            quis ut nam facilis et officia qui
-          </h2>
-
-          <a className="UserInfo" href="mailto:Julianne.OConner@kory.org">
-            Patricia Lebsack
-          </a>
-        </article>
-      </section>
+      <TodoList todos={todos} />
     </div>
   );
 };

src/components/TodoInfo/TodoInfo.tsx

@@ -1 +1,17 @@
-export const TodoInfo = () => {};
+import { UserInfo } from '../UserInfo';
+
+type TodoInfoProps = {
+  todo: Todo;
+};
+
+export const TodoInfo: React.FC<TodoInfoProps> = ({ todo }) => {
+  return (
+    <article
+      data-id={todo.id}
+      className={`TodoInfo ${todo.completed ? 'TodoInfo--completed' : ''}`}
+    >
+      <h2 className="TodoInfo__title">{todo.title}</h2>
+      {todo.user && <UserInfo user={todo.user} />}
+    </article>
+  );
+};

src/components/TodoList/TodoList.tsx

@@ -1 +1,22 @@
-export const TodoList = () => {};
+import { TodoInfo } from '../TodoInfo';
+
+type Todo = {
+  id: number;
+  title: string;
+  completed: boolean;
+  user: User | null;
+};
+
+type TodoListProps = {
+  todos: Todo[];
+};
+
+export const TodoList: React.FC<TodoListProps> = ({ todos }) => {
+  return (
+    <section className="TodoList">
+      {todos.map(todo => (
+        <TodoInfo key={todo.id} todo={todo} />
+      ))}
+    </section>
+  );
+};

src/components/UserInfo/UserInfo.tsx

@@ -1 +1,11 @@
-export const UserInfo = () => {};
+type UserInfoProps = {
+  user: User;
+};
+
+export const UserInfo: React.FC<UserInfoProps> = ({ user }) => {
+  return (
+    <a className="UserInfo" href={`mailto:${user.email}`}>
+      {user.name}
+    </a>
+  );
+};