implement solution

README.md

@@ -33,4 +33,4 @@ Implement a simple [TODO app](https://mate-academy.github.io/react_todo-app/) th
 - Implement a solution following the [React task guidelines](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
 - Open another terminal and run tests with `npm test` to ensure your solution is correct.
-- Replace `<your_account>` with your GitHub username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app/) and add it to the PR description.
+- Replace `<your_account>` with your GitHub username in the [DEMO LINK](https://whomngmnt.github.io/react_todo-app/) and add it to the PR description.

src/App.tsx

@@ -1,157 +1,37 @@
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import { useContext } from 'react';
+import { Footer } from './components/Footer/Footer';
+import { Header } from './components/Header/Header';
+import { TodoContext, TodoProvider } from './components/Context/TodoContext';
+import { TodoList } from './components/TodoList/TodoList';
+
+const TodoApp = () => {
+  const context = useContext(TodoContext);
+
+  if (!context) {
+    return null;
+  }
+
+  const hasTodos = context.state.todos.length > 0;
 
-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>
+        <Header />
+        {hasTodos && (
+          <>
+            <TodoList />
+            <Footer />
+          </>
+        )}
       </div>
     </div>
   );
 };
+
+export const App = () => (
+  <TodoProvider>
+    <TodoApp />
+  </TodoProvider>
+);

src/components/Context/TodoContext.tsx

@@ -0,0 +1,66 @@
+import {
+  createContext,
+  Dispatch,
+  ReactNode,
+  useEffect,
+  useReducer,
+} from 'react';
+import { Todo } from '../../types/type';
+import { Action, todoReducer } from './TodoReducer';
+
+export type FilterStatus = 'all' | 'active' | 'completed';
+
+export type TodoState = {
+  todos: Todo[];
+  filter: FilterStatus;
+};
+
+type TodoContextValue = {
+  state: TodoState;
+  dispatch: Dispatch<Action>;
+};
+
+const STORAGE_KEY = 'todos';
+
+const getInitialState = (): TodoState => {
+  const savedTodos = localStorage.getItem(STORAGE_KEY);
+
+  if (!savedTodos) {
+    return {
+      todos: [],
+      filter: 'all',
+    };
+  }
+
+  try {
+    return {
+      todos: JSON.parse(savedTodos) as Todo[],
+      filter: 'all',
+    };
+  } catch {
+    return {
+      todos: [],
+      filter: 'all',
+    };
+  }
+};
+
+export const TodoContext = createContext<TodoContextValue | null>(null);
+
+type Props = {
+  children: ReactNode;
+};
+
+export const TodoProvider = ({ children }: Props) => {
+  const [state, dispatch] = useReducer(todoReducer, undefined, getInitialState);
+
+  useEffect(() => {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(state.todos));
+  }, [state.todos]);
+
+  return (
+    <TodoContext.Provider value={{ state, dispatch }}>
+      {children}
+    </TodoContext.Provider>
+  );
+};

src/components/Context/TodoReducer.tsx

@@ -0,0 +1,73 @@
+import type { FilterStatus, TodoState } from './TodoContext';
+
+type UpdateTodoPayload = {
+  id: number;
+  title?: string;
+  completed?: boolean;
+};
+
+export type Action =
+  | { type: 'add'; payload: string }
+  | { type: 'delete'; payload: number }
+  | { type: 'update'; payload: UpdateTodoPayload }
+  | { type: 'setFilter'; payload: FilterStatus }
+  | { type: 'toggleAll' }
+  | { type: 'clearCompleted' };
+
+export const todoReducer = (state: TodoState, action: Action): TodoState => {
+  switch (action.type) {
+    case 'add':
+      return {
+        ...state,
+        todos: [
+          ...state.todos,
+          {
+            id: +new Date(),
+            title: action.payload,
+            completed: false,
+          },
+        ],
+      };
+
+    case 'delete':
+      return {
+        ...state,
+        todos: state.todos.filter(todo => todo.id !== action.payload),
+      };
+
+    case 'update':
+      return {
+        ...state,
+        todos: state.todos.map(todo =>
+          todo.id === action.payload.id ? { ...todo, ...action.payload } : todo,
+        ),
+      };
+
+    case 'setFilter':
+      return {
+        ...state,
+        filter: action.payload,
+      };
+
+    case 'toggleAll': {
+      const shouldCompleteAll = state.todos.some(todo => !todo.completed);
+
+      return {
+        ...state,
+        todos: state.todos.map(todo => ({
+          ...todo,
+          completed: shouldCompleteAll,
+        })),
+      };
+    }
+
+    case 'clearCompleted':
+      return {
+        ...state,
+        todos: state.todos.filter(todo => !todo.completed),
+      };
+
+    default:
+      return state;
+  }
+};

src/components/Filter/Filter.tsx

@@ -0,0 +1,38 @@
+import { useContext } from 'react';
+import { FilterStatus, TodoContext } from '../Context/TodoContext';
+
+const filters: { label: string; value: FilterStatus; dataCy: string }[] = [
+  { label: 'All', value: 'all', dataCy: 'FilterLinkAll' },
+  { label: 'Active', value: 'active', dataCy: 'FilterLinkActive' },
+  { label: 'Completed', value: 'completed', dataCy: 'FilterLinkCompleted' },
+];
+
+export const Filter = () => {
+  const context = useContext(TodoContext);
+
+  if (!context) {
+    return null;
+  }
+
+  const { filter } = context.state;
+  const { dispatch } = context;
+
+  return (
+    <nav className="filter" data-cy="Filter">
+      {filters.map(item => (
+        <a
+          key={item.value}
+          href={`#/${item.value === 'all' ? '' : item.value}`}
+          className={`filter__link ${filter === item.value ? 'selected' : ''}`}
+          data-cy={item.dataCy}
+          onClick={event => {
+            event.preventDefault();
+            dispatch({ type: 'setFilter', payload: item.value });
+          }}
+        >
+          {item.label}
+        </a>
+      ))}
+    </nav>
+  );
+};