add task solution

src/App.tsx

@@ -1,26 +1,220 @@
-/* eslint-disable max-len */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useState, useMemo, useRef } from 'react';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import {
+  USER_ID,
+  getTodos,
+  createTodo,
+  deleteTodo,
+  updateTodo,
+} from './api/todos';
+import { TodoHeader } from './Components/TodoHeader';
+import { TodoFooter } from './Components/TodoFooter';
+import { Todo } from './types/Todo';
+import { TodoFilter } from './types/TodoFilter';
+import { TodoItem } from './Components/TodoItem';
+import { Error } from './Components/Error';
+import { TodoErrorType } from './types/TodoErrorType';
+import { CSSTransition, TransitionGroup } from 'react-transition-group';
 
 export const App: React.FC = () => {
+  const [currentFilter, setCurrentFilter] = useState<TodoFilter>(
+    TodoFilter.All,
+  );
+  const [todoList, setTodoList] = useState<Todo[]>([]);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [todoError, setTodoError] = useState<TodoErrorType>(TodoErrorType.None);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+  const [isAddingLoading, setIsAddingLoading] = useState(false);
+
+  const todoTitleRef = useRef<HTMLInputElement>(null);
+
+  const uncompletedTodos = useMemo(
+    () => todoList.filter(todo => !todo.completed),
+    [todoList],
+  );
+
+  const completedTodos = useMemo(
+    () => todoList.filter(todo => todo.completed),
+    [todoList],
+  );
+
+  const isAllTodoCompleted = useMemo(() => {
+    return completedTodos.length === todoList.length;
+  }, [completedTodos, todoList]);
+
+  const filteredTodos = useMemo(() => {
+    switch (currentFilter) {
+      case TodoFilter.Active:
+        return uncompletedTodos;
+      case TodoFilter.Completed:
+        return completedTodos;
+      default:
+        return todoList;
+    }
+  }, [completedTodos, currentFilter, todoList, uncompletedTodos]);
+
+  const handleAddTodo = async (title: string): Promise<boolean> => {
+    if (!title) {
+      setTodoError(TodoErrorType.EmptyTitle);
+
+      return false;
+    }
+
+    setTempTodo({
+      id: 0,
+      title,
+      userId: USER_ID,
+      completed: false,
+    });
+
+    setIsAddingLoading(true);
+    try {
+      const createdTodo = await createTodo(title);
+
+      setTodoList(prevTodoList => [...prevTodoList, createdTodo]);
+
+      return true;
+    } catch (error) {
+      setTodoError(TodoErrorType.UnableToAddTodo);
+
+      return false;
+    } finally {
+      setTempTodo(null);
+      setIsAddingLoading(false);
+    }
+  };
+
+  const handleUpdateTodo = async (todoToUpdate: Todo): Promise<boolean> => {
+    setLoadingTodoIds(prev => [...prev, todoToUpdate.id]);
+
+    try {
+      const updatedTodo = await updateTodo(todoToUpdate);
+
+      setTodoList(prevTodoList =>
+        prevTodoList.map(todo =>
+          todo.id === updatedTodo.id ? updatedTodo : todo,
+        ),
+      );
+
+      return true;
+    } catch (error) {
+      setTodoError(TodoErrorType.UnableToUpdateTodo);
+
+      return false;
+    } finally {
+      setLoadingTodoIds(prev =>
+        prev.filter(todoId => todoId !== todoToUpdate.id),
+      );
+    }
+  };
+
+  const handleDeleteTodo = async (id: number): Promise<boolean> => {
+    setLoadingTodoIds(prev => [...prev, id]);
+
+    try {
+      await deleteTodo(id);
+      setTodoList(prevTodoList => prevTodoList.filter(todo => todo.id !== id));
+      todoTitleRef.current?.focus();
+
+      return true;
+    } catch (error) {
+      setTodoError(TodoErrorType.UnableToDeleteTodo);
+
+      return false;
+    } finally {
+      setLoadingTodoIds(prev => prev.filter(todoId => todoId !== id));
+    }
+  };
+
+  const handleDeleteCompletedTodos = () => {
+    completedTodos.forEach(todo => handleDeleteTodo(todo.id));
+  };
+
+  const handleToggleAllTodos = () => {
+    if (uncompletedTodos.length > 0) {
+      uncompletedTodos.forEach(todo => {
+        handleUpdateTodo({ ...todo, completed: true });
+      });
+    } else {
+      todoList.forEach(todo => {
+        handleUpdateTodo({ ...todo, completed: false });
+      });
+    }
+  };
+
+  useEffect(() => {
+    const loadTodosFromServer = async () => {
+      try {
+        const todosFromServer = await getTodos();
+
+        setTodoList(todosFromServer);
+      } catch (error) {
+        setTodoError(TodoErrorType.UnableToLoadTodos);
+      }
+    };
+
+    loadTodosFromServer();
+  }, []);
+
   if (!USER_ID) {
     return <UserWarning />;
   }
 
   return (
-    <section className="section container">
-      <p className="title is-4">
-        Copy all you need from the prev task:
-        <br />
-        <a href="https://github.com/mate-academy/react_todo-app-add-and-delete#react-todo-app-add-and-delete">
-          React Todo App - Add and Delete
-        </a>
-      </p>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <TodoHeader
+          todoTitleRef={todoTitleRef}
+          onAddTodo={handleAddTodo}
+          onToggleAllTodos={handleToggleAllTodos}
+          isLoading={isAddingLoading}
+          isAllTodoCompleted={isAllTodoCompleted}
+          isTodoListNotEmpty={!!todoList.length}
+        />
+
+        <section className="todoapp__main" data-cy="TodoList">
+          <TransitionGroup>
+            {filteredTodos.map(todo => (
+              <CSSTransition key={todo.id} timeout={300} classNames="item">
+                <TodoItem
+                  todo={todo}
+                  key={todo.id}
+                  onUpdateTodo={handleUpdateTodo}
+                  onDeleteTodo={handleDeleteTodo}
+                  isLoading={loadingTodoIds.includes(todo.id)}
+                />
+              </CSSTransition>
+            ))}
+
+            {tempTodo && (
+              <CSSTransition key={0} timeout={300} classNames="temp-item">
+                <TodoItem
+                  todo={tempTodo}
+                  onUpdateTodo={handleUpdateTodo}
+                  onDeleteTodo={handleDeleteTodo}
+                  isLoading={isAddingLoading}
+                />
+              </CSSTransition>
+            )}
+          </TransitionGroup>
+        </section>
+
+        {!!todoList.length && (
+          <TodoFooter
+            currentFilter={currentFilter}
+            onFilterChange={setCurrentFilter}
+            todosLeft={uncompletedTodos.length}
+            completedTodos={completedTodos.length}
+            onDeleteCompletedTodos={handleDeleteCompletedTodos}
+          />
+        )}
+      </div>
+
+      <Error error={todoError} setError={setTodoError} />
+    </div>
   );
 };

src/Components/Error.tsx

@@ -0,0 +1,41 @@
+import React, { Dispatch, SetStateAction, useEffect } from 'react';
+import cn from 'classnames';
+import { TodoErrorType } from '../types/TodoErrorType';
+
+type Props = {
+  error: TodoErrorType;
+  setError: Dispatch<SetStateAction<TodoErrorType>>;
+};
+
+export const Error: React.FC<Props> = ({ error, setError }) => {
+  useEffect(() => {
+    if (!error) {
+      return;
+    }
+
+    const timerId = setTimeout(() => {
+      setError(TodoErrorType.None);
+    }, 3000);
+
+    return () => {
+      clearTimeout(timerId);
+    };
+  }, [error, setError]);
+
+  return (
+    <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"
+        onClick={() => setError(TodoErrorType.None)}
+      />
+      {error}
+    </div>
+  );
+};

src/Components/TodoFooter.tsx

@@ -0,0 +1,54 @@
+import React, { Dispatch, SetStateAction } from 'react';
+import cn from 'classnames';
+import { TodoFilter } from '../types/TodoFilter';
+
+type Props = {
+  currentFilter: TodoFilter;
+  onFilterChange: Dispatch<SetStateAction<TodoFilter>>;
+  todosLeft: number;
+  completedTodos: number;
+  onDeleteCompletedTodos: () => void;
+};
+
+export const TodoFooter: React.FC<Props> = ({
+  currentFilter,
+  onFilterChange,
+  todosLeft,
+  completedTodos,
+  onDeleteCompletedTodos,
+}) => {
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todosLeft} items left
+      </span>
+
+      {/* Active link should have the 'selected' class */}
+      <nav className="filter" data-cy="Filter">
+        {Object.values(TodoFilter).map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: currentFilter === filter,
+            })}
+            data-cy={`FilterLink${filter}`}
+            onClick={() => onFilterChange(filter)}
+          >
+            {filter}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={onDeleteCompletedTodos}
+        disabled={!completedTodos}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/Components/TodoHeader.tsx

@@ -0,0 +1,65 @@
+import { useState, useEffect } from 'react';
+import cn from 'classnames';
+
+type Props = {
+  todoTitleRef: React.RefObject<HTMLInputElement> | null;
+  onAddTodo: (title: string) => Promise<boolean>;
+  onToggleAllTodos: () => void;
+  isLoading: boolean;
+  isAllTodoCompleted: boolean;
+  isTodoListNotEmpty: boolean;
+};
+
+export const TodoHeader: React.FC<Props> = ({
+  todoTitleRef,
+  onAddTodo,
+  onToggleAllTodos,
+  isLoading,
+  isAllTodoCompleted,
+  isTodoListNotEmpty,
+}) => {
+  const [todoTitle, setTodoTitle] = useState('');
+
+  const onSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    const trimmedTitle = todoTitle.trim();
+
+    const success = await onAddTodo(trimmedTitle);
+
+    if (success) {
+      setTodoTitle('');
+    }
+  };
+
+  useEffect(() => {
+    if (!isLoading) {
+      todoTitleRef?.current?.focus();
+    }
+  }, [todoTitleRef, isLoading]);
+
+  return (
+    <header className="todoapp__header">
+      {isTodoListNotEmpty && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', { active: isAllTodoCompleted })}
+          data-cy="ToggleAllButton"
+          onClick={onToggleAllTodos}
+        />
+      )}
+
+      <form onSubmit={onSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          ref={todoTitleRef}
+          value={todoTitle}
+          onChange={event => setTodoTitle(event.target.value)}
+          disabled={isLoading}
+        />
+      </form>
+    </header>
+  );
+};