copy src from develop branch

src/App.tsx

@@ -1,156 +1,59 @@
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
 
-export const App: React.FC = () => {
-  return (
-    <div className="todoapp">
-      <h1 className="todoapp__title">todos</h1>
+import { useContext, useState } from 'react';
+import { TodosContext } from './components/TodosContext';
+import { Footer } from './components/Footer';
+import { FilterMethods } from './types/FilterMethods';
+import { Header } from './components/Header';
+import { Main } from './components/Main';
 
-      <div className="todoapp__content">
-        <header className="todoapp__header">
-          {/* this button should have `active` class only if all todos are completed */}
-          <button
-            type="button"
-            className="todoapp__toggle-all active"
-            data-cy="ToggleAllButton"
-          />
+export const App: React.FC = () => {
+  const context = useContext(TodosContext);
 
-          {/* Add a todo on form submit */}
-          <form>
-            <input
-              data-cy="NewTodoField"
-              type="text"
-              className="todoapp__new-todo"
-              placeholder="What needs to be done?"
-            />
-          </form>
-        </header>
+  if (!context) {
+    throw new Error('useTodos must be used within a TodosProvider');
+  }
 
-        <section className="todoapp__main" data-cy="TodoList">
-          {/* This is a completed todo */}
-          <div data-cy="Todo" className="todo completed">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-                checked
-              />
-            </label>
+  const { todos } = context;
 
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
+  const [filterMethod, setFilterMethod] = useState<FilterMethods>(
+    FilterMethods.all,
+  );
 
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
+  function filterTodos(method: FilterMethods) {
+    let currentTodos = [...todos];
 
-          {/* This todo is an active todo */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
+    switch (method) {
+      case FilterMethods.all:
+        return currentTodos;
 
-            <span data-cy="TodoTitle" className="todo__title">
-              Not Completed Todo
-            </span>
+      case FilterMethods.active:
+        currentTodos = currentTodos.filter(todo => !todo.completed);
+        break;
 
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
+      case FilterMethods.completed:
+        currentTodos = currentTodos.filter(todo => todo.completed);
+        break;
+    }
 
-          {/* This todo is being edited */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
+    return currentTodos;
+  }
 
-            {/* This form is shown instead of the title and remove button */}
-            <form>
-              <input
-                data-cy="TodoTitleField"
-                type="text"
-                className="todo__title-field"
-                placeholder="Empty todo will be deleted"
-                value="Todo is being edited now"
-              />
-            </form>
-          </div>
+  const visibleTodos = filterTodos(filterMethod);
 
-          {/* This todo is in loadind state */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
+  return (
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
 
-            <span data-cy="TodoTitle" className="todo__title">
-              Todo is being saved now
-            </span>
+      <div className="todoapp__content">
+        <Header />
 
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
+        <Main visibleTodos={visibleTodos} />
 
         {/* Hide the footer if there are no todos */}
-        <footer className="todoapp__footer" data-cy="Footer">
-          <span className="todo-count" data-cy="TodosCounter">
-            3 items left
-          </span>
-
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
-
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
-
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
-
-          {/* this button should be disabled if there are no completed todos */}
-          <button
-            type="button"
-            className="todoapp__clear-completed"
-            data-cy="ClearCompletedButton"
-          >
-            Clear completed
-          </button>
-        </footer>
+        {todos.length !== 0 && (
+          <Footer onFilter={setFilterMethod} filterList={filterMethod} />
+        )}
       </div>
     </div>
   );

src/components/Footer.tsx

@@ -0,0 +1,81 @@
+import { useContext } from 'react';
+import { TodosContext } from './TodosContext';
+import { FilterMethods } from '../types/FilterMethods';
+import classNames from 'classnames';
+
+type Props = {
+  onFilter: (v: FilterMethods) => void;
+  filterList: FilterMethods | null;
+};
+
+export const Footer: React.FC<Props> = ({ onFilter, filterList }) => {
+  const context = useContext(TodosContext);
+
+  if (!context) {
+    throw new Error('useTodos must be used within a TodosProvider');
+  }
+
+  const { todos, setTodos, inputFocus } = context;
+
+  function clearCompleted() {
+    const clearedTodos = todos.filter(todo => !todo.completed);
+
+    setTodos(clearedTodos);
+    inputFocus.current?.focus();
+  }
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {`${todos.filter(el => !el.completed).length} items left`}
+      </span>
+
+      {/* Active link should have the 'selected' class */}
+      <nav className="filter" data-cy="Filter">
+        <a
+          onClick={() => {
+            onFilter(FilterMethods.all);
+          }}
+          className={classNames('filter__link', {
+            selected: filterList === FilterMethods.all,
+          })}
+          data-cy="FilterLinkAll"
+        >
+          All
+        </a>
+
+        <a
+          onClick={() => onFilter(FilterMethods.active)}
+          className={classNames('filter__link', {
+            selected: filterList === FilterMethods.active,
+          })}
+          data-cy="FilterLinkActive"
+        >
+          Active
+        </a>
+
+        <a
+          onClick={() => onFilter(FilterMethods.completed)}
+          className={classNames('filter__link', {
+            selected: filterList === FilterMethods.completed,
+          })}
+          data-cy="FilterLinkCompleted"
+        >
+          Completed
+        </a>
+      </nav>
+
+      {/* this button should be disabled if there are no completed todos */}
+
+      <button
+        disabled={todos.every(el => !el.completed)}
+        onClick={() => clearCompleted()}
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/Form.tsx

@@ -0,0 +1,43 @@
+import { useContext, useState } from 'react';
+import { TodosContext } from './TodosContext';
+
+export const Form = () => {
+  const [title, setTitle] = useState('');
+  const context = useContext(TodosContext);
+
+  if (!context) {
+    throw new Error('useTodos must be used within a TodosProvider');
+  }
+
+  const { addTodo, inputFocus } = context;
+
+  return (
+    <form
+      onSubmit={e => {
+        e.preventDefault();
+        if (!title.trim()) {
+          return;
+        }
+
+        addTodo({
+          id: +new Date(),
+          title: title.trim(),
+          completed: false,
+        });
+
+        setTitle('');
+      }}
+    >
+      <input
+        autoFocus
+        ref={inputFocus}
+        data-cy="NewTodoField"
+        type="text"
+        className="todoapp__new-todo"
+        placeholder="What needs to be done?"
+        value={title}
+        onChange={e => setTitle(e.target.value)}
+      />
+    </form>
+  );
+};

src/components/Header.tsx

@@ -0,0 +1,42 @@
+import classNames from 'classnames';
+import { useContext } from 'react';
+import { TodosContext } from './TodosContext';
+import { Form } from './Form';
+
+export const Header: React.FC = () => {
+  const context = useContext(TodosContext);
+
+  if (!context) {
+    throw new Error('useTodos must be used within a TodosProvider');
+  }
+
+  const { todos, updateTodo } = context;
+
+  const toggleAll = () => {
+    const allCompleted = todos.every(todo => todo.completed);
+    const newStatus = !allCompleted;
+
+    todos.forEach(todo => {
+      updateTodo(todo.id, { completed: newStatus });
+    });
+  };
+
+  return (
+    <header className="todoapp__header">
+      {/* this button should have `active` class only if all todos are completed */}
+      {todos.length !== 0 && (
+        <button
+          onClick={toggleAll}
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: todos.every(el => el.completed),
+          })}
+          data-cy="ToggleAllButton"
+        />
+      )}
+
+      {/* Add a todo on form submit */}
+      <Form />
+    </header>
+  );
+};

src/components/Main.tsx

@@ -0,0 +1,24 @@
+import { useState } from 'react';
+import { Todo } from '../types/Todo';
+import { TodoItem } from './TodoItem';
+
+type Props = {
+  visibleTodos: Todo[];
+};
+
+export const Main: React.FC<Props> = ({ visibleTodos }) => {
+  const [editingTodo, setEditingTodo] = useState<Date | number | null>(null);
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {visibleTodos?.map(todo => (
+        <TodoItem
+          key={`${todo.id}-${todo.completed}`}
+          todo={todo}
+          editing={editingTodo}
+          onEdit={setEditingTodo}
+        />
+      ))}
+    </section>
+  );
+};