Solution

cypress/tsconfig.json

@@ -3,4 +3,4 @@
   "compilerOptions": {
     "sourceMap": false
   }
-}
+}

package.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "@cypress/react18": "^2.0.1",
-    "@mate-academy/scripts": "^1.9.12",
+    "@mate-academy/scripts": "^2.1.3",
     "@mate-academy/students-ts-config": "*",
     "@mate-academy/stylelint-config": "*",
     "@types/node": "^20.14.10",

src/App.tsx

@@ -1,156 +1,87 @@
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useState, useContext, useRef, useEffect } from 'react';
+import classNames from 'classnames';
+import { TodoContext } from './components/TodoContext';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { Todo } from './types/Todo';
 
 export const App: React.FC = () => {
+  const { todos, addTodo, toggleAll } = useContext(TodoContext);
+  const [filter, setFilter] = useState<'All' | 'Active' | 'Completed'>('All');
+  const [title, setTitle] = useState<string>('');
+
+  const newTodoField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    newTodoField.current?.focus();
+  }, [todos.length]);
+
+  const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => {
+    e.preventDefault();
+    const trimmedTitle = title.trim();
+
+    if (!trimmedTitle) {
+      return;
+    }
+
+    addTodo(trimmedTitle);
+    setTitle('');
+  };
+
+  const visibleTodos = todos.filter((todo: Todo) => {
+    if (filter === 'Active') {
+      return !todo.completed;
+    }
+
+    if (filter === 'Completed') {
+      return todo.completed;
+    }
+
+    return true;
+  });
+
+  const isAllCompleted =
+    todos.length > 0 && todos.every((todo: Todo) => todo.completed);
+
   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"
-          />
+          {todos.length > 0 && (
+            <button
+              type="button"
+              className={classNames('todoapp__toggle-all', {
+                active: isAllCompleted,
+              })}
+              data-cy="ToggleAllButton"
+              onClick={toggleAll}
+            />
+          )}
 
-          {/* Add a todo on form submit */}
-          <form>
+          <form onSubmit={handleSubmit}>
             <input
               data-cy="NewTodoField"
               type="text"
               className="todoapp__new-todo"
               placeholder="What needs to be done?"
+              autoFocus
+              ref={newTodoField}
+              value={title}
+              onChange={(e: React.ChangeEvent<HTMLInputElement>) =>
+                setTitle(e.target.value)
+              }
             />
           </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>
+        {todos.length > 0 && (
+          <>
+            <TodoList visibleTodos={visibleTodos} />
+            <Footer filter={filter} setFilter={setFilter} />
+          </>
+        )}
       </div>
     </div>
   );

src/UserWarning.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+
+export const UserWarning: React.FC = () => (
+  <section className="section">
+    <p className="box is-size-3">
+      Please get your <b> userId </b>{' '}
+      <a href="https://mate-academy.github.io/react_student-registration">
+        here
+      </a>{' '}
+      and save it in the app <pre>const USER_ID = ...</pre>
+      All requests to the API must be sent with this
+      <b> userId.</b>
+    </p>
+  </section>
+);

src/components/ErrorNotification.tsx

@@ -0,0 +1,23 @@
+type Prop = {
+  errorMessage: string;
+  setErrorMessage: (errorMessage: string) => void;
+};
+
+export const ErrorNotification = ({ errorMessage, setErrorMessage }: Prop) => {
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={`notification is-danger is-light has-text-weight-normal ${
+        !errorMessage ? 'hidden' : ''
+      }`}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={() => setErrorMessage('')}
+      />
+      {errorMessage}
+    </div>
+  );
+};

src/components/Footer.tsx

@@ -0,0 +1,52 @@
+import { useContext } from 'react';
+import type { Dispatch, SetStateAction } from 'react';
+import classNames from 'classnames';
+import { TodoContext } from './TodoContext';
+
+type FilterType = 'All' | 'Active' | 'Completed';
+
+export const Footer: React.FC<{
+  filter: FilterType;
+  setFilter: Dispatch<SetStateAction<FilterType>>;
+}> = ({ filter, setFilter }) => {
+  const { todos, clearCompleted } = useContext(TodoContext);
+
+  const activeCount = todos.filter(todo => !todo.completed).length;
+  const hasCompleted = todos.some(todo => todo.completed);
+
+  const filters: FilterType[] = ['All', 'Active', 'Completed'];
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {activeCount} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {filters.map((filterName: FilterType) => (
+          <a
+            key={filterName}
+            href="#/"
+            className={classNames('filter__link', {
+              selected: filter === filterName,
+            })}
+            data-cy={`FilterLink${filterName}`}
+            onClick={() => setFilter(filterName)}
+          >
+            {filterName}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!hasCompleted}
+        onClick={clearCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};