Solution

src/App.tsx

@@ -1,157 +1,8 @@
-/* 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>
-
-      <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"
-          />
-
-          {/* 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>
-
-        <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>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
-
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* 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>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Not Completed Todo
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* 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>
-
-            {/* 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>
-
-          {/* 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>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Todo is being saved now
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
-
-        {/* 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>
-      </div>
-    </div>
-  );
-};
+import { Todos } from './components/Todo/Todos';
+import { TodosProvider } from './context/TodoContext';
+
+export const App = () => (
+  <TodosProvider>
+    <Todos />
+  </TodosProvider>
+);

src/components/ErrorNotification/ErrorNotification.tsx

@@ -0,0 +1,20 @@
+import { FC } from 'react';
+import { getTodoErrorsMessage } from '../../utils/todos/getTodoErrorsMessage';
+import cn from 'classnames';
+import { TodoErrors } from '../../utils/enums/TodoErrors';
+
+interface ErrorNotificationProps {
+  error: TodoErrors | null;
+}
+
+export const ErrorNotification: FC<ErrorNotificationProps> = ({ error }) => (
+  <div
+    data-cy="ErrorNotification"
+    className={cn('notification is-danger is-light has-text-weight-normal', {
+      hidden: !error,
+    })}
+  >
+    <button data-cy="HideErrorButton" type="button" className="delete" />
+    {error && getTodoErrorsMessage(error)}
+  </div>
+);

src/components/Todo/TodoFooter/TodoFooter.tsx

@@ -0,0 +1,61 @@
+import { Dispatch, FC, SetStateAction } from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../../types/Todo';
+import { TODO_FILTER_OPTIONS } from '../../../constants/TodoFilter';
+
+import { FilterStatuses } from '../../../utils/enums/FilterStatuses';
+import {
+  getInCompletedTodos,
+  hasCompletedTodos,
+} from '../../../utils/todos/getTodos';
+import { useDeleteTodo } from '../../../hooks/useDeleteTodo';
+
+interface TodoFooterProps {
+  todos: Todo[];
+  setStatus: Dispatch<SetStateAction<FilterStatuses>>;
+  status: FilterStatuses;
+}
+
+export const TodoFooter: FC<TodoFooterProps> = ({
+  todos,
+  setStatus,
+  status,
+}) => {
+  const isCompletedTodoCounter = getInCompletedTodos(todos).length;
+  const { handleDeleteCompletedTodos } = useDeleteTodo();
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {isCompletedTodoCounter}
+        {isCompletedTodoCounter === 1 ? ' item ' : ' items '}
+        left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {TODO_FILTER_OPTIONS.map(({ value, title, href, id }) => (
+          <a
+            href={href}
+            className={cn('filter__link', { selected: status === value })}
+            data-cy={`FilterLink${title}`}
+            key={id}
+            onClick={() => setStatus(value)}
+          >
+            {title}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!hasCompletedTodos(todos)}
+        onClick={handleDeleteCompletedTodos}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/Todo/TodoForm/TodoForm.tsx

@@ -0,0 +1,25 @@
+import { useContext } from 'react';
+
+import { TodosContext } from '../../../context/TodoContext';
+import { useTodoFormManager } from '../../../hooks/useTodoFormManager';
+
+export const TodoForm = () => {
+  const { inputRef } = useContext(TodosContext);
+  const { title, handleSubmit, handleChangeTitle, isInputDisabled } =
+    useTodoFormManager();
+
+  return (
+    <form onSubmit={handleSubmit}>
+      <input
+        data-cy="NewTodoField"
+        type="text"
+        className="todoapp__new-todo"
+        placeholder="What needs to be done?"
+        value={title}
+        ref={inputRef}
+        disabled={isInputDisabled}
+        onChange={handleChangeTitle}
+      />
+    </form>
+  );
+};

src/components/Todo/TodoHeader/TodoHeader.tsx

@@ -0,0 +1,32 @@
+import { FC } from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../../types/Todo';
+import { isAllTodosCompleted } from '../../../utils/todos/getTodos';
+import { TodoForm } from '../TodoForm/TodoForm';
+import { useTodoFormManager } from '../../../hooks/useTodoFormManager';
+
+interface TodoHeaderProps {
+  todos: Todo[];
+}
+
+export const TodoHeader: FC<TodoHeaderProps> = ({ todos }) => {
+  const { handleToogleAllTodoStatus } = useTodoFormManager();
+
+  return (
+    <header className="todoapp__header">
+      {!!todos.length && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', {
+            active: isAllTodosCompleted(todos),
+          })}
+          data-cy="ToggleAllButton"
+          onClick={handleToogleAllTodoStatus}
+        />
+      )}
+
+      <TodoForm />
+    </header>
+  );
+};