add task solution

src/App.tsx

@@ -1,61 +1,154 @@
+import React, { useState } from 'react';
 import './App.scss';
+import usersFromServer from './api/users';
+import todosFromServer from './api/todos';
+import { TodoList } from './components/TodoList/TodoList';
 
-// import usersFromServer from './api/users';
-// import todosFromServer from './api/todos';
+type User = {
+  id: number;
+  name: string;
+  email: string;
+};
+
+type Todo = {
+  id: number;
+  title: string;
+  user: User;
+  completed: boolean;
+};
+
+export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>(
+    todosFromServer.map(todo => {
+      const user = usersFromServer.find(u => u.id === todo.userId) || {
+        id: 0,
+        name: 'Unknown',
+        email: '',
+      };
+
+      return {
+        id: todo.id,
+        title: todo.title,
+        user,
+        completed: todo.completed,
+      };
+    }),
+  );
+
+  const [errors, setErrors] = useState<{
+    title: string | null;
+    user: string | null;
+  }>({
+    title: null,
+    user: null,
+  });
+
+  const addTodo = (todo: Omit<Todo, 'id'>) => {
+    const maxId = todos.length > 0 ? Math.max(...todos.map(t => t.id)) : 0;
+
+    const newTodo: Todo = {
+      id: maxId + 1,
+      ...todo,
+    };
+
+    setTodos(prevTodos => [...prevTodos, newTodo]);
+  };
 
-export const App = () => {
   return (
     <div className="App">
       <h1>Add todo form</h1>
 
-      <form action="/api/todos" method="POST">
+      <form
+        onSubmit={e => {
+          e.preventDefault();
+          const form = e.currentTarget;
+
+          const titleElement = form.elements.namedItem('title');
+          const userElement = form.elements.namedItem('user');
+
+          if (
+            !(titleElement instanceof HTMLInputElement) ||
+            !(userElement instanceof HTMLSelectElement)
+          ) {
+            return;
+          }
+
+          const title = titleElement.value.trim();
+          const userId = parseInt(userElement.value, 10);
+          const user = usersFromServer.find(u => u.id === userId);
+
+          const newErrors = {
+            title: title ? null : 'Please enter a title',
+            user: user ? null : 'Please choose a user',
+          };
+
+          setErrors(newErrors);
+
+          if (newErrors.title || newErrors.user) {
+            return;
+          }
+
+          addTodo({
+            title,
+            user: user as User,
+            completed: false,
+          });
+
+          setErrors({ title: null, user: null });
+          form.reset();
+        }}
+      >
         <div className="field">
-          <input type="text" data-cy="titleInput" />
-          <span className="error">Please enter a title</span>
+          Title:
+          <input
+            type="text"
+            name="title"
+            data-cy="titleInput"
+            placeholder="Enter a title"
+            onChange={() => {
+              setErrors(prev => ({ ...prev, title: null }));
+            }}
+          />
         </div>
 
         <div className="field">
-          <select data-cy="userSelect">
-            <option value="0" disabled>
+          User:
+          <select
+            name="user"
+            data-cy="userSelect"
+            defaultValue=""
+            onChange={() => {
+              setErrors(prev => ({ ...prev, user: null }));
+            }}
+          >
+            <option value="" disabled>
               Choose a user
             </option>
+            {usersFromServer.map(user => (
+              <option key={user.id} value={user.id}>
+                {user.name}
+              </option>
+            ))}
           </select>
-
-          <span className="error">Please choose a user</span>
         </div>
 
+        {errors.title && (
+          <p className="error" data-cy="errorMessage">
+            {errors.title}
+          </p>
+        )}
+        {errors.user && (
+          <p className="error" data-cy="errorMessage">
+            {errors.user}
+          </p>
+        )}
+
         <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:[email protected]">
-            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:[email protected]">
-            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:[email protected]">
-            Patricia Lebsack
-          </a>
-        </article>
-      </section>
+      <TodoList todos={todos} />
     </div>
   );
 };

src/components/TodoInfo/TodoInfo.tsx

@@ -1 +1,25 @@
-export const TodoInfo = () => {};
+import React from 'react';
+import { UserInfo } from '../UserInfo/UserInfo';
+
+type Todo = {
+  id: number;
+  title: string;
+  user: { name: string; email: string };
+  completed: boolean;
+};
+
+type Props = {
+  todo: Todo;
+};
+
+export const TodoInfo: React.FC<Props> = ({ todo }) => {
+  return (
+    <article
+      className={`TodoInfo ${todo.completed ? 'TodoInfo--completed' : ''}`}
+      data-id={todo.id}
+    >
+      <h2 className="TodoInfo__title">{todo.title}</h2>
+      <UserInfo user={todo.user} />
+    </article>
+  );
+};

src/components/TodoList/TodoList.tsx

@@ -1 +1,28 @@
-export const TodoList = () => {};
+import React from 'react';
+import { TodoInfo } from '../TodoInfo/TodoInfo';
+
+export type User = {
+  name: string;
+  email: string;
+};
+
+export type Todo = {
+  id: number;
+  title: string;
+  user: User;
+  completed: boolean;
+};
+
+type Props = {
+  todos: Todo[];
+};
+
+export const TodoList: React.FC<Props> = ({ todos }) => {
+  return (
+    <section className="TodoList">
+      {todos.map(todo => (
+        <TodoInfo key={todo.id} todo={todo} />
+      ))}
+    </section>
+  );
+};

src/components/UserInfo/UserInfo.tsx

@@ -1 +1,13 @@
-export const UserInfo = () => {};
+import React from 'react';
+
+type Props = {
+  user: { name: string; email: string };
+};
+
+export const UserInfo: React.FC<Props> = ({ user }) => {
+  return (
+    <a className="UserInfo" href={`mailto:${user.email}`}>
+      {user.name}
+    </a>
+  );
+};