Конец урока

src/App.jsx

@@ -1,79 +1,67 @@
-import { useState, createContext, useContext } from 'react'
+import React, { useState, useReducer, useRef, memo } from 'react'
-import styles from './App.module.scss'
 
-const UserContext = createContext('')
+function tasksReducer(state, action) {
-
+    switch(action.type) {
-function UserProvider({ children }) {
+        case 'ADD_TASK':
-    const [name,setName] = useState('');
+            return [...state, action.payload]
-    
+        case 'TOGGLE_TASK':
-    const toggleName = (newName) => {
+            return state.map(task => task.id === action.payload ? {...task, complite: !task.complite} : task)
-        setName(newName);
+        case 'REMOVE_TASK':
+            return state.filter(task => task.id !== action.payload)
+        default:
+            return state
     }
+}
 
+const TaskList = memo(function TaskList({tasks, onToggle, onRemove}) {
+    console.log("Rendred")
     return (
-        <UserContext.Provider value={{name, toggleName}}>
+        <ul>
-            {children}
+        {tasks.map(({id, text, complite}) => (
-        </UserContext.Provider>
+                <li key={id}
+                    style={{textDecoration: complite ? 'line-through' : 'none' }}>
+                    <input type="checkbox" checked={complite} onChange={()=>onToggle(id)} />
+                    {text}
+                    <button onClick={()=> onRemove(id)} style={{marginLeft: 10}}>
+                        Удалить
+                    </button>
+                </li>
+            ))}
+        </ul>
     )
-}
+})
-
-function Form() {
-    const {name, toggleName} = useContext(UserContext)
-    const [newName,setNewName] = useState('');
-    const handleSubmit = (event) => {
-        event.preventDefault();
-        toggleName(event.target[0].value)
-    }
-    const handlerChange = (event) => {
-        setNewName(event.target.value);
-    }
-    return (
-        <form onSubmit={handleSubmit}>
-        <input type='text' value={newName} onChange={handlerChange} />
-        <button type='submit'>Войти</button>
-        </form>
-    )
-}
-
-function ExitButton() {
-    const {name, toggleName} = useContext(UserContext)
-    
-    return (
-        <button onClick={() => toggleName('')}>Выход</button>
-    )
-}
-
-function Toolbar() {
-    const {name, toggleName} = useContext(UserContext)
-    return(
-        <div className={styles.container}>
-            <h3>Панель пользователя</h3>
-            {name && `Привет ${name}`}
-            {name ? <ExitButton /> : <Form /> }
-            
-        </div>
-    )
-}
-
-function Page() {
-    return (
-        <div>
-            <h1 style={{textAlign: 'center'}}>Главная страница</h1>
-            <Toolbar />
-        </div>
-    )
-}
 
 function App() {
+    const [tasks, dispatch] = useReducer(tasksReducer,[])
+    const [input,setInput] = useState('')
+    const [error,setError] = useState('')
+    const inputRef = useRef(null)
+    
+    const addTask = () => {
+        if (input.trim() === '') {
+            setError('Пустой текст задачи')
+            return
+        }
+        setError('')
+        dispatch({
+            type: 'ADD_TASK',
+            payload: {id: Date.now(), text: input.trim(), complite: false }
+        })
+        setInput('')
+        inputRef.current.focus()
+    }
     
 	return (
-		<>
+		<div style={{padding: 20}}>
-			{/* Добавьте тестовый контент для проверки */}
+			<h1>Список дел</h1>
-			<h1>Hello, React!</h1>
+			<input ref={inputRef} value={input} onChange={e => setInput(e.target.value)} />
-        <UserProvider>
+			<button onClick={addTask}>Добавить</button>
-            <Page />
+            {error && <p style={{color: 'red'}}>{error}</p>}
-        </UserProvider>
+            
-		</>
+            <TaskList tasks={tasks} 
+                onToggle={id => dispatch({type: 'TOGGLE_TASK', payload: id})}
+                onRemove={id => dispatch({type: 'REMOVE_TASK', payload: id})} />
+		</div>
 	)
 }
 

src/App.module.scss

@@ -1,13 +0,0 @@
-.container {
-    height: 500px;
-    border: 1px solid black;
-    border-radius: 10px;
-    background-color: lightblue;
-}
-.item {
-    font-size: 16pt;
-    border: 1px dotted gray;
-    /*margin: 5px 10px;
-    padding: 10px;*/
-    border-radius: 5px;
-}