solution 0.01

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://StanislavKapytsia.github.io/react_todo-app/) and add it to the PR description.

src/App.tsx

@@ -1,156 +1,28 @@
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useContext, useState } from 'react';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { TodosContext } from './GlobalData/TodosDeveloper';
+import { Filter } from './types/Filter';
 
 export const App: React.FC = () => {
+  const { todos } = useContext(TodosContext);
+  const [filter, setFilter] = useState<Filter>(Filter.All);
+
   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 />
+
+        {todos.length > 0 && (
+          <>
+            <TodoList filter={filter} />
+            <Footer filter={filter} setFilter={setFilter} />
+          </>
+        )}
       </div>
     </div>
   );

src/GlobalData/TodosDeveloper.tsx

@@ -0,0 +1,48 @@
+import React, { useEffect, useMemo, useRef, useState } from 'react';
+import { Todo } from '../types/Todo';
+import { InitialState } from '../types/InitialState';
+import { InputRefs } from '../types/InputRefs';
+
+const initialState: InitialState = {
+  todos: [],
+  setTodos: () => {},
+};
+
+export const TodosContext = React.createContext(initialState);
+
+export const InputsFocusContext = React.createContext<InputRefs | null>(null);
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodosDeveloper: React.FC<Props> = ({ children }) => {
+  const [todos, setTodos] = useState<Todo[]>(() => {
+    const savedTodos = localStorage.getItem('todos');
+
+    return savedTodos ? JSON.parse(savedTodos) : [];
+  });
+
+  const inputRef1 = useRef<HTMLInputElement | null>(null);
+  const inputRef2 = useRef<HTMLInputElement | null>(null);
+
+  useEffect(() => {
+    localStorage.setItem('todos', JSON.stringify(todos));
+  }, [todos]);
+
+  const value = useMemo(
+    () => ({
+      todos,
+      setTodos,
+    }),
+    [todos],
+  );
+
+  return (
+    <TodosContext.Provider value={value}>
+      <InputsFocusContext.Provider value={{ inputRef1, inputRef2 }}>
+        {children}
+      </InputsFocusContext.Provider>
+    </TodosContext.Provider>
+  );
+};

src/components/EditTodo.tsx

@@ -0,0 +1,96 @@
+import React, { useContext, useEffect, useRef, useState } from 'react';
+import { InputsFocusContext, TodosContext } from '../GlobalData/TodosDeveloper';
+import { Todo } from '../types/Todo';
+import { deleteTodo } from './Todo';
+
+interface Props {
+  todo: Todo;
+  setEditing: React.Dispatch<React.SetStateAction<boolean>>;
+}
+
+export const EditTodo: React.FC<Props> = ({ todo, setEditing }) => {
+  const [value, setValue] = useState(todo.title);
+
+  const { setTodos } = useContext(TodosContext);
+  const prevValue = useRef<string | null>(null);
+
+  const inputRefs = useContext(InputsFocusContext);
+
+  const handleCancel = () => {
+    if (prevValue.current) {
+      setValue(prevValue.current);
+    } else {
+      setValue(todo.title);
+    }
+
+    setEditing(false);
+  };
+
+  useEffect(() => {
+    prevValue.current = value;
+  }, [value]);
+
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        handleCancel();
+      }
+    };
+
+    document.addEventListener('keydown', handleKeyDown);
+
+    return () => {
+      document.removeEventListener('keydown', handleKeyDown);
+    };
+  });
+
+  useEffect(() => {
+    if (inputRefs?.inputRef2?.current) {
+      inputRefs?.inputRef2?.current.focus();
+    }
+  }, [inputRefs]);
+
+  const updateContentTodo = (content: Todo) => {
+    setTodos(currentTodos =>
+      currentTodos.map(item =>
+        item.id === content.id && item.title !== value
+          ? { ...item, title: value.trim() }
+          : item,
+      ),
+    );
+  };
+
+  const handleOnSubmit = (e?: React.FormEvent<HTMLFormElement>) => {
+    if (e) {
+      e.preventDefault();
+    }
+
+    if (value.trim().length === 0) {
+      deleteTodo(todo, setTodos);
+      setEditing(false);
+
+      return;
+    }
+
+    updateContentTodo(todo);
+    setEditing(false);
+  };
+
+  return (
+    <form onSubmit={handleOnSubmit}>
+      <input
+        ref={inputRefs && inputRefs.inputRef2}
+        data-cy="TodoTitleField"
+        type="text"
+        className="todo__title-field"
+        placeholder="Empty todo will be deleted"
+        value={value}
+        onChange={e => setValue(e.target.value)}
+        onBlur={() => {
+          handleOnSubmit();
+          setEditing(false);
+        }}
+      />
+    </form>
+  );
+};

src/components/Footer.tsx

@@ -0,0 +1,56 @@
+import React, { useContext } from 'react';
+import { TodosContext } from '../GlobalData/TodosDeveloper';
+import { Filter } from '../types/Filter';
+import classNames from 'classnames';
+import { deleteTodo } from './Todo';
+
+interface Props {
+  filter: string;
+  setFilter: React.Dispatch<React.SetStateAction<Filter>>;
+}
+
+export const Footer: React.FC<Props> = ({ filter, setFilter }) => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const handleDeleteTodo = () => {
+    todos.forEach(todo => {
+      if (todo.completed) {
+        deleteTodo(todo, setTodos);
+      }
+    });
+  };
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {`${todos.filter(todo => !todo.completed).length} items left`}
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {(Object.values(Filter) as Filter[]).map(way => (
+          <a
+            key={way}
+            href="#/"
+            className={classNames('filter__link', { selected: filter === way })}
+            data-cy={`FilterLink${way}`}
+            onClick={() => {
+              setFilter(way);
+            }}
+          >
+            {way}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={todos.every(todo => !todo.completed)}
+        onClick={handleDeleteTodo}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};