add solution (part 3)

src/App.tsx

@@ -1,26 +1,182 @@
-/* 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 { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import React, { useEffect, useMemo, useRef, useState } from 'react';
+import { TodoHeader } from './Components/TodoHeader';
+import { TodoFooter } from './Components/TodoFooter';
+import { ErrorNotification } from './Components/ErrorNotification';
+import {
+  addTodo,
+  deleteTodo,
+  getTodos,
+  updateTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { ErrorType } from './types/ErrorType';
+import { Filter } from './types/Filter';
+import { TodoList } from './Components/TodoList';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
-  }
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [filterStatus, setFilterStatus] = useState<Filter>(Filter.All);
+  const [errorMessage, setErrorMessage] = useState<ErrorType>(ErrorType.Empty);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+
+  const addTodoInputRef = useRef<HTMLInputElement>(null);
+
+  const filteredTodos = useMemo(
+    () =>
+      todos.filter(todo => {
+        switch (filterStatus) {
+          case Filter.Active:
+            return !todo.completed;
+          case Filter.Completed:
+            return todo.completed;
+          case Filter.All:
+          default:
+            return true;
+        }
+      }),
+    [todos, filterStatus],
+  );
+
+  const uncompletedTodosLeft = useMemo(
+    () => todos.filter(todo => !todo.completed).length,
+    [todos],
+  );
+
+  const completedTodosLeft = useMemo(
+    () => todos.filter(todo => todo.completed).length,
+    [todos],
+  );
+
+  const isAllCompleted = useMemo(
+    () => todos.length === completedTodosLeft,
+    [todos, completedTodosLeft],
+  );
+
+  useEffect(() => {
+    (async () => {
+      try {
+        const data = await getTodos();
+
+        setTodos(data);
+      } catch (err) {
+        setErrorMessage(ErrorType.LoadTodos);
+      }
+    })();
+  }, []);
+
+  const onAddTodo = async (todoTitle: string) => {
+    setTempTodo({ id: 0, title: todoTitle, completed: false, userId: USER_ID });
+
+    try {
+      const newTodo = await addTodo({ title: todoTitle, completed: false });
+
+      setTodos(prev => [...prev, newTodo]);
+    } catch (error) {
+      setErrorMessage(ErrorType.AddTodo);
+      addTodoInputRef?.current?.focus();
+      throw error;
+    } finally {
+      setTempTodo(null);
+    }
+  };
+
+  const onRemoveTodo = async (todoId: number) => {
+    setLoadingTodoIds(prev => [...prev, todoId]);
+
+    try {
+      await deleteTodo(todoId);
+      setTodos(prev => prev.filter(todo => todo.id !== todoId));
+    } catch (error) {
+      setErrorMessage(ErrorType.DeleteTodo);
+      addTodoInputRef?.current?.focus();
+      throw error;
+    } finally {
+      setLoadingTodoIds(prev => prev.filter(id => id !== todoId));
+    }
+  };
+
+  const onClearCompleted = async () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    completedTodos.forEach(todo => {
+      onRemoveTodo(todo.id);
+    });
+  };
+
+  const onUpdateTodo = async (todoToUpdate: Todo) => {
+    setLoadingTodoIds(prev => [...prev, todoToUpdate.id]);
+
+    try {
+      const updatedTodo = await updateTodo(todoToUpdate);
+
+      setTodos(prevTodos =>
+        prevTodos.map(todo =>
+          todo.id === updatedTodo.id ? updatedTodo : todo,
+        ),
+      );
+    } catch (error) {
+      setErrorMessage(ErrorType.UpdateTodo);
+      throw error;
+    } finally {
+      setLoadingTodoIds(prev => prev.filter(id => id !== todoToUpdate.id));
+    }
+  };
+
+  const onToggleAll = async () => {
+    if (uncompletedTodosLeft > 0) {
+      const activeTodos = todos.filter(todo => !todo.completed);
+
+      activeTodos.forEach(todo => {
+        onUpdateTodo({ ...todo, completed: true });
+      });
+    } else {
+      todos.forEach(todo => {
+        onUpdateTodo({ ...todo, completed: false });
+      });
+    }
+  };
 
   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
+          onAddTodo={onAddTodo}
+          setErrorMessage={setErrorMessage}
+          isInputDisabled={!!tempTodo}
+          onToggleAll={onToggleAll}
+          todosLength={todos.length}
+          isAllCompleted={isAllCompleted}
+          inputRef={addTodoInputRef}
+        />
+
+        {(!!todos.length || tempTodo) && (
+          <>
+            <TodoList
+              filteredTodos={filteredTodos}
+              loadingTodoIds={loadingTodoIds}
+              tempTodo={tempTodo}
+              removeTodo={onRemoveTodo}
+              updateTodo={onUpdateTodo}
+            />
+
+            <TodoFooter
+              filterStatus={filterStatus}
+              setFilterStatus={setFilterStatus}
+              todosLeft={uncompletedTodosLeft}
+              completedTodosLeft={completedTodosLeft}
+              onClearCompleted={onClearCompleted}
+            />
+          </>
+        )}
+      </div>
+
+      <ErrorNotification error={errorMessage} setError={setErrorMessage} />
+    </div>
   );
 };

src/Components/ErrorNotification/ErrorNotification.tsx

@@ -0,0 +1,41 @@
+import React, { Dispatch, SetStateAction, useEffect } from 'react';
+import cn from 'classnames';
+import { ErrorType } from '../../types/ErrorType';
+
+type Props = {
+  error: ErrorType;
+  setError: Dispatch<SetStateAction<ErrorType>>;
+};
+
+export const ErrorNotification: React.FC<Props> = ({ error, setError }) => {
+  useEffect(() => {
+    if (error === ErrorType.Empty) {
+      return;
+    }
+
+    const timerId = setTimeout(() => {
+      setError(ErrorType.Empty);
+    }, 3000);
+
+    return () => {
+      clearTimeout(timerId);
+    };
+  }, [error, setError]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn('notification is-danger is-light has-text-weight-normal', {
+        hidden: error === ErrorType.Empty,
+      })}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={() => setError(ErrorType.Empty)}
+      />
+      {error}
+    </div>
+  );
+};

src/Components/ErrorNotification/index.ts

@@ -0,0 +1 @@
+export * from './ErrorNotification';

src/Components/TodoFooter/TodoFooter.tsx

@@ -0,0 +1,55 @@
+import React, { Dispatch, SetStateAction } from 'react';
+import cn from 'classnames';
+import { Filter } from '../../types/Filter';
+
+type Props = {
+  filterStatus: Filter;
+  setFilterStatus: Dispatch<SetStateAction<Filter>>;
+  todosLeft: number;
+  completedTodosLeft: number;
+  onClearCompleted: () => Promise<void>;
+};
+
+export const TodoFooter: React.FC<Props> = props => {
+  const {
+    filterStatus,
+    setFilterStatus,
+    todosLeft,
+    onClearCompleted,
+    completedTodosLeft,
+  } = props;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todosLeft} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Filter).map(value => (
+          <a
+            key={value}
+            href={`#/${value === Filter.All ? '' : value.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: filterStatus === value,
+            })}
+            data-cy={`FilterLink${value}`}
+            onClick={() => setFilterStatus(value)}
+          >
+            {value}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={onClearCompleted}
+        disabled={completedTodosLeft === 0}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/Components/TodoFooter/index.ts

@@ -0,0 +1 @@
+export * from './TodoFooter';

src/Components/TodoHeader/TodoHeader.tsx

@@ -0,0 +1,73 @@
+import React, { Dispatch, SetStateAction, useEffect, useState } from 'react';
+import { ErrorType } from '../../types/ErrorType';
+import cn from 'classnames';
+
+type Props = {
+  todosLength: number;
+  onAddTodo: (value: string) => Promise<void>;
+  setErrorMessage: Dispatch<SetStateAction<ErrorType>>;
+  isInputDisabled: boolean;
+  isAllCompleted: boolean;
+  onToggleAll: () => Promise<void>;
+  inputRef: React.RefObject<HTMLInputElement> | null;
+};
+
+export const TodoHeader: React.FC<Props> = ({
+  todosLength,
+  onAddTodo,
+  setErrorMessage,
+  isInputDisabled,
+  isAllCompleted,
+  onToggleAll,
+  inputRef,
+}) => {
+  const [inputValue, setInputValue] = useState('');
+
+  const onSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    if (inputValue.trim() === '') {
+      setErrorMessage(ErrorType.EmptyTodoTitle);
+
+      return;
+    }
+
+    try {
+      await onAddTodo(inputValue.trim());
+      setInputValue('');
+    } catch (error) {}
+  };
+
+  useEffect(() => {
+    if (!isInputDisabled) {
+      inputRef?.current?.focus();
+    }
+  }, [todosLength, inputRef, isInputDisabled]);
+
+  return (
+    <header className="todoapp__header">
+      {todosLength > 0 && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', { active: isAllCompleted })}
+          data-cy="ToggleAllButton"
+          onClick={onToggleAll}
+        />
+      )}
+
+      <form onSubmit={onSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          ref={inputRef}
+          value={inputValue}
+          onChange={(event: React.ChangeEvent<HTMLInputElement>) =>
+            setInputValue(event.target.value)
+          }
+          disabled={isInputDisabled}
+        />
+      </form>
+    </header>
+  );
+};

src/Components/TodoHeader/index.ts

@@ -0,0 +1 @@
+export * from './TodoHeader';