add task solution

src/App.tsx

@@ -1,157 +1,67 @@
+/* eslint-disable react-hooks/exhaustive-deps */
+/* eslint-disable @typescript-eslint/indent */
+/* eslint-disable react-hooks/rules-of-hooks */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useContext, useState } from 'react';
+import { Footer } from './components/Footer';
+import { SelectedFilter } from './types/SelectedFilter';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { ErrorSection } from './components/ErrorSection';
+import { initialErrorMessage } from './constants/initialErrorMessage';
+import { TodosContext } from './context/TodosContext';
 
 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>
+  const [errorMessage, setErrorMessage] = useState(initialErrorMessage);
+  const [selectedFilter, setSelectedFilter] = useState<SelectedFilter>(
+    SelectedFilter.all,
+  );
+  const [editingTitle, setEditingTitle] = useState<number>(0);
 
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
+  const { todos } = useContext(TodosContext);
 
-        {/* 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>
+  const visibleTodos = todos.filter(todo => {
+    switch (selectedFilter) {
+      case SelectedFilter.all:
+        return true;
 
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
+      case SelectedFilter.active:
+        return !todo.completed;
 
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
+      case SelectedFilter.completed:
+        return todo.completed;
+    }
+  });
 
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
+  return (
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
 
-          {/* 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 className="todoapp__content">
+        <Header
+          visibleTodos={visibleTodos}
+          errorMessage={errorMessage}
+          setErrorMessage={setErrorMessage}
+          editingTitle={editingTitle}
+        />
+
+        <TodoList
+          visibleTodos={visibleTodos}
+          editingTitle={editingTitle}
+          setEditingTitle={setEditingTitle}
+        />
+
+        <Footer
+          selectedFilter={selectedFilter}
+          setSelectedFilter={setSelectedFilter}
+        />
       </div>
+
+      <ErrorSection
+        errorMessage={errorMessage}
+        setErrorMessage={setErrorMessage}
+      />
     </div>
   );
 };

src/components/ErrorSection.tsx

@@ -0,0 +1,46 @@
+import classNames from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+import { initialErrorMessage } from '../constants/initialErrorMessage';
+
+type Props = {
+  errorMessage: ErrorMessage;
+  setErrorMessage: (errorMessage: ErrorMessage) => void;
+};
+
+export const ErrorSection: React.FC<Props> = ({
+  errorMessage,
+  setErrorMessage,
+}) => (
+  <div
+    data-cy="ErrorNotification"
+    className={classNames(
+      'notification',
+      'is-danger',
+      'is-light',
+      'has-text-weight-normal',
+      {
+        hidden:
+          !errorMessage.load &&
+          !errorMessage.delete &&
+          !errorMessage.create &&
+          !errorMessage.emptyTitle &&
+          !errorMessage.updating,
+      },
+    )}
+  >
+    <button
+      data-cy="HideErrorButton"
+      type="button"
+      className="delete"
+      onClick={() => {
+        setErrorMessage(initialErrorMessage);
+      }}
+    />
+    {/* show only one message at a time */}
+    {errorMessage.load && 'Unable to load todos'}
+    {errorMessage.create && 'Unable to add a todo'}
+    {errorMessage.delete && 'Unable to delete a todo'}
+    {errorMessage.emptyTitle && 'Title should not be empty'}
+    {errorMessage.updating && 'Unable to update a todo'}
+  </div>
+);

src/components/Footer.tsx

@@ -0,0 +1,65 @@
+import classNames from 'classnames';
+import { SelectedFilter } from '../types/SelectedFilter';
+import { Todo } from '../types/Todo';
+import { useContext } from 'react';
+import { TodosContext } from '../context/TodosContext';
+
+type Props = {
+  selectedFilter: SelectedFilter;
+  setSelectedFilter: (filter: SelectedFilter) => void;
+};
+
+export const Footer: React.FC<Props> = ({
+  selectedFilter,
+  setSelectedFilter,
+}) => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const itemLeft: number = todos.filter(todo => !todo.completed).length;
+  const completedTodos: Todo[] = todos.filter(todo => todo.completed);
+
+  function deleteCompletedTodos() {
+    const newTodos: Todo[] = todos.filter(todo => !todo.completed);
+
+    setTodos(newTodos);
+  }
+
+  return (
+    !!todos.length && (
+      <footer className="todoapp__footer" data-cy="Footer">
+        <span className="todo-count" data-cy="TodosCounter">
+          {itemLeft} items left
+        </span>
+
+        {/* Active link should have the 'selected' class */}
+        <nav className="filter" data-cy="Filter">
+          {Object.values(SelectedFilter).map(button => {
+            return (
+              <a
+                key={button}
+                href={button === SelectedFilter.all ? '#/' : `#/${button}`}
+                className={classNames('filter__link', {
+                  selected: selectedFilter === button,
+                })}
+                data-cy={`FilterLink${button}`}
+                onClick={() => setSelectedFilter(button)}
+              >
+                {button}
+              </a>
+            );
+          })}
+        </nav>
+
+        <button
+          type="button"
+          className="todoapp__clear-completed"
+          data-cy="ClearCompletedButton"
+          disabled={completedTodos.length === 0}
+          onClick={deleteCompletedTodos}
+        >
+          Clear completed
+        </button>
+      </footer>
+    )
+  );
+};

src/components/FormEditingTitle.tsx

@@ -0,0 +1,54 @@
+import { useEffect } from 'react';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  todo: Todo;
+  titleEdit: string;
+  setTitleEdit: (titleEdit: string) => void;
+  handleChangeSubmit: (todo: Todo) => void;
+  setEditingTitle: (editingTitle: number) => void;
+};
+
+export const FormEditingTitle: React.FC<Props> = ({
+  todo,
+  titleEdit,
+  setTitleEdit,
+  handleChangeSubmit,
+  setEditingTitle,
+}) => {
+  useEffect(() => {
+    function handleKeyPress(event: KeyboardEvent) {
+      if (event.key === 'Escape') {
+        setEditingTitle(0);
+      }
+    }
+
+    window.addEventListener('keyup', handleKeyPress);
+
+    return () => {
+      window.removeEventListener('keyup', handleKeyPress);
+    };
+  });
+
+  return (
+    <form
+      onSubmit={event => {
+        event.preventDefault();
+        handleChangeSubmit(todo);
+      }}
+    >
+      <input
+        data-cy="TodoTitleField"
+        type="text"
+        className="todoapp__edit-todo"
+        placeholder="What needs to be done?"
+        value={titleEdit}
+        onBlur={() => handleChangeSubmit(todo)}
+        autoFocus
+        onChange={event => {
+          setTitleEdit(event.target.value);
+        }}
+      />
+    </form>
+  );
+};