react_add-todo-form

src/App.tsx

@@ -1,61 +1,40 @@
 import './App.scss';
+import { TodoList } from './components/TodoList';
+import todosFromServer from './api/todos';
+import { useState } from 'react';
+import { getUserById } from './services/user';
+import { Todo } from './types/Todo';
+import { PostForm } from './PostForm';
 
-// import usersFromServer from './api/users';
-// import todosFromServer from './api/todos';
+const initialTodos: Todo[] = todosFromServer.map(todo => ({
+  ...todo,
+  user: getUserById(todo.userId),
+}));
+
+function getNewTodoId(todos: Todo[]) {
+  const maxId = Math.max(...todos.map(todo => todo.id));
+
+  return maxId + 1;
+}
+
+export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>(initialTodos);
+
+  const onAddTodo = ({ id, ...data }: Todo) => {
+    const newTodo = {
+      id: getNewTodoId(todos),
+      ...data,
+    };
+
+    setTodos(currentTodo => [...currentTodo, newTodo]);
+  };
 
-export const App = () => {
   return (
     <div className="App">
       <h1>Add todo form</h1>
 
-      <form action="/api/todos" method="POST">
-        <div className="field">
-          <input type="text" data-cy="titleInput" />
-          <span className="error">Please enter a title</span>
-        </div>
-
-        <div className="field">
-          <select data-cy="userSelect">
-            <option value="0" disabled>
-              Choose a user
-            </option>
-          </select>
-
-          <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>
+      <PostForm onSubmit={onAddTodo} />
+      <TodoList todos={todos} />
     </div>
   );
 };

src/PostForm.tsx

@@ -0,0 +1,104 @@
+import usersFromServer from './api/users';
+import { useState } from 'react';
+import { getUserById } from './services/user';
+import { Todo } from './types/Todo';
+
+type Props = {
+  onSubmit: (todo: Todo) => void;
+};
+
+export const PostForm: React.FC<Props> = ({ onSubmit }) => {
+  const [titleErrorMessage, setTitleErrorMessage] = useState('');
+  const [title, setTitle] = useState('');
+  const hasTitleError = titleErrorMessage !== '';
+  const [hasUserIdError, setHasUserIdError] = useState(false);
+  const [userId, setUserId] = useState(0);
+
+  const handleUserIdChange = (event: React.ChangeEvent<HTMLSelectElement>) => {
+    setUserId(+event.target.value);
+    setHasUserIdError(false);
+  };
+
+  const reset = () => {
+    setUserId(0);
+    setTitle('');
+    setTitleErrorMessage('');
+    setHasUserIdError(false);
+  };
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    setHasUserIdError(!userId);
+
+    if (!title) {
+      setTitleErrorMessage('Please enter a title');
+
+      return;
+    }
+
+    if (!title || !userId) {
+      return;
+    }
+
+    onSubmit({
+      id: 0,
+      title,
+      completed: false,
+      userId,
+      user: getUserById(userId),
+    });
+
+    reset();
+  };
+
+  return (
+    <form action="/api/todos" method="POST" onSubmit={handleSubmit}>
+      <div className="field">
+        Title:&nbsp;
+        <input
+          type="text"
+          data-cy="titleInput"
+          placeholder="Enter a title"
+          value={title}
+          onChange={event => {
+            const inputValue = event.target.value;
+
+            setTitle(inputValue);
+
+            if (inputValue) {
+              setTitleErrorMessage('');
+            } else {
+              setTitleErrorMessage('Please enter a title');
+            }
+          }}
+        />
+        {hasTitleError && <span className="error">{titleErrorMessage}</span>}
+      </div>
+
+      <div className="field">
+        User:&nbsp;
+        <select
+          data-cy="userSelect"
+          value={userId}
+          onChange={handleUserIdChange}
+        >
+          <option value="0" disabled>
+            Choose a user
+          </option>
+
+          {usersFromServer.map(user => (
+            <option value={user.id} key={user.id}>
+              {user.name}
+            </option>
+          ))}
+        </select>
+        {hasUserIdError && <span className="error">Please choose a user</span>}
+      </div>
+
+      <button type="submit" data-cy="submitButton">
+        Add
+      </button>
+    </form>
+  );
+};

src/components/TodoInfo/TodoInfo.tsx

@@ -1 +1,19 @@
-export const TodoInfo = () => {};
+import { Todo } from '../../types/Todo';
+import { UserInfo } from '../UserInfo';
+
+type Props = {
+  todo: Todo;
+};
+
+export const TodoInfo: React.FC<Props> = ({ 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 +1,16 @@
-export const TodoList = () => {};
+import { Todo } from '../../types/Todo';
+import { TodoInfo } from '../TodoInfo';
+
+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 { User } from '../../types/User';
+
+type Props = {
+  user: User;
+};
+
+export const UserInfo: React.FC<Props> = ({ user }) => {
+  return (
+    <a className="UserInfo" href={`mailto:${user.email}`}>
+      {user.name}
+    </a>
+  );
+};

src/services/user.ts

@@ -0,0 +1,6 @@
+import usersFromServer from '../api/users';
+import { User } from '../types/User';
+
+export function getUserById(userId: number): User | null {
+  return usersFromServer.find(user => user.id === userId) || null;
+}

src/types/Todo.ts

@@ -0,0 +1,9 @@
+import { User } from './User';
+
+export interface Todo {
+  id: number;
+  title: string;
+  completed: boolean;
+  userId: number;
+  user: User | null;
+}

src/types/User.ts

@@ -0,0 +1,6 @@
+export interface User {
+  id: number;
+  name: string;
+  username: string;
+  email: string;
+}