Solution

README.md

@@ -47,4 +47,4 @@ Implement the ability to edit a todo title on double click:
 
 - Implement a solution following the [React task guideline](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).
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app-with-api/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://aholubko.github.io/react_todo-app-with-api/) and add it to the PR description.

src/App.tsx

@@ -1,26 +1,268 @@
-/* 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, useRef, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import {
+  addTodo,
+  deleteTodo,
+  getTodos,
+  updateTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
 
-const USER_ID = 0;
+import { FilterBy } from './types/FilterBy';
+import { TodoFooter } from './components/TodoFooter';
+import { ErrorNotification } from './components/ErrorNotification';
+import { TodoHeader } from './components/TodoHeader';
+import { TodoItem } from './components/TodoItem';
 
 export const App: React.FC = () => {
+  //#region State
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [filterBy, setFilterBy] = useState(FilterBy.All);
+  const [errorMessage, setErrorMessage] = useState('');
+
+  const [title, setTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isAdding, setIsAdding] = useState(false);
+  const [processingIds, setProcessingIds] = useState<number[]>([]);
+  //#endregion
+
+  //#region Refs
+  const inputRef = useRef<HTMLInputElement>(null);
+  //#endregion
+
+  //#region Derived values
+  const activeTodosCount = todos.filter(todo => !todo.completed).length;
+  const completedTodosCount = todos.filter(todo => todo.completed).length;
+  const allCompleted = todos.length > 0 && activeTodosCount === 0;
+
+  let visibleTodos = todos;
+
+  if (filterBy === FilterBy.Active) {
+    visibleTodos = visibleTodos.filter(todo => !todo.completed);
+  }
+
+  if (filterBy === FilterBy.Completed) {
+    visibleTodos = visibleTodos.filter(todo => todo.completed);
+  }
+  //#endregion
+
+  //#region Handlers
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    if (title.trim() === '') {
+      setErrorMessage('Title should not be empty');
+
+      return;
+    }
+
+    const newTempTodo = {
+      id: 0,
+      title: title.trim(),
+      completed: false,
+      userId: USER_ID,
+    };
+
+    setErrorMessage('');
+    setIsAdding(true);
+
+    setTempTodo(newTempTodo);
+
+    addTodo(title.trim())
+      .then(newTodo => {
+        setTodos(currentTodos => [...currentTodos, newTodo]);
+        setTitle('');
+        setTempTodo(null);
+      })
+      .catch(() => {
+        setErrorMessage('Unable to add a todo');
+        setTempTodo(null);
+      })
+      .finally(() => {
+        setIsAdding(false);
+        setTimeout(() => {
+          inputRef.current?.focus();
+        }, 0);
+      });
+  };
+
+  const handleDelete = (todoId: number) => {
+    setErrorMessage('');
+
+    setProcessingIds(currentIds => [...currentIds, todoId]);
+
+    return deleteTodo(todoId)
+      .then(() => {
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        );
+      })
+      .catch(() => {
+        setErrorMessage('Unable to delete a todo');
+      })
+      .finally(() => {
+        setProcessingIds(currentIds => currentIds.filter(id => id !== todoId));
+        setTimeout(() => {
+          inputRef.current?.focus();
+        }, 0);
+      });
+  };
+
+  const handleClearCompleted = () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    return Promise.all(completedTodos.map(todo => handleDelete(todo.id)));
+  };
+
+  const handleToggle = (todo: Todo) => {
+    const newCompletedStatus = !todo.completed;
+
+    setErrorMessage('');
+
+    setProcessingIds(currentIds => [...currentIds, todo.id]);
+
+    return updateTodo(todo.id, { completed: newCompletedStatus })
+      .then(updatedTodo => {
+        setTodos(currentTodos =>
+          currentTodos.map(currentTodo =>
+            currentTodo.id === todo.id ? updatedTodo : currentTodo,
+          ),
+        );
+      })
+      .catch(() => {
+        setErrorMessage('Unable to update a todo');
+      })
+      .finally(() => {
+        setProcessingIds(currentIds => currentIds.filter(id => id !== todo.id));
+      });
+  };
+
+  const handleToggleAll = () => {
+    const newCompletedStatus = !allCompleted;
+
+    const todosToUpdate = todos.filter(
+      todo => todo.completed !== newCompletedStatus,
+    );
+
+    return Promise.all(todosToUpdate.map(todo => handleToggle(todo)));
+  };
+
+  const handleUpdate = (todoId: number, newTitle: string) => {
+    setErrorMessage('');
+
+    setProcessingIds(currentIds => [...currentIds, todoId]);
+
+    return updateTodo(todoId, { title: newTitle })
+      .then(updatedTodo => {
+        setTodos(currentTodos =>
+          currentTodos.map(currentTodo =>
+            currentTodo.id === todoId ? updatedTodo : currentTodo,
+          ),
+        );
+      })
+      .catch(() => {
+        setErrorMessage('Unable to update a todo');
+
+        throw new Error();
+      })
+      .finally(() => {
+        setProcessingIds(currentIds => currentIds.filter(id => id !== todoId));
+      });
+  };
+
+  //#endregion
+
+  //#region Effects
+  useEffect(() => {
+    setErrorMessage('');
+
+    getTodos()
+      .then(setTodos)
+      .catch(() => setErrorMessage('Unable to load todos'));
+  }, []);
+
+  useEffect(() => {
+    inputRef.current?.focus();
+  }, []);
+
+  useEffect(() => {
+    if (!errorMessage) {
+      return;
+    }
+
+    const timerId = window.setTimeout(() => {
+      setErrorMessage('');
+    }, 3000);
+
+    return () => {
+      window.clearTimeout(timerId);
+    };
+  }, [errorMessage]);
+  //#endregion
+
   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
+          allCompleted={allCompleted}
+          handleSubmit={handleSubmit}
+          title={title}
+          setTitle={setTitle}
+          isAdding={isAdding}
+          inputRef={inputRef}
+          handleToggleAll={handleToggleAll}
+          hasTodos={todos.length > 0}
+        />
+
+        {(todos.length > 0 || tempTodo) && (
+          <section className="todoapp__main" data-cy="TodoList">
+            {visibleTodos.map(todo => (
+              <TodoItem
+                key={todo.id}
+                todo={todo}
+                onDelete={handleDelete}
+                isProcessing={processingIds.includes(todo.id)}
+                onToggle={handleToggle}
+                onUpdate={handleUpdate}
+              />
+            ))}
+
+            {tempTodo && (
+              <TodoItem
+                todo={tempTodo}
+                onDelete={handleDelete}
+                isProcessing
+                onToggle={handleToggle}
+                onUpdate={handleUpdate}
+              />
+            )}
+          </section>
+        )}
+
+        {todos.length > 0 && (
+          <TodoFooter
+            activeTodosCount={activeTodosCount}
+            completedTodosCount={completedTodosCount}
+            filterBy={filterBy}
+            setFilterBy={setFilterBy}
+            handleClearCompleted={handleClearCompleted}
+          />
+        )}
+      </div>
+
+      <ErrorNotification
+        errorMessage={errorMessage}
+        setErrorMessage={setErrorMessage}
+      />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,25 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 4192;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+// Add more methods here
+export const addTodo = (title: string) => {
+  return client.post<Todo>('/todos', {
+    userId: USER_ID,
+    title: title.trim(),
+    completed: false,
+  });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodo = (todoId: number, data: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${todoId}`, data);
+};

src/components/ErrorNotification.tsx

@@ -0,0 +1,32 @@
+import React from 'react';
+import classNames from 'classnames';
+
+type Props = {
+  errorMessage: string;
+  setErrorMessage: (value: string) => void;
+};
+
+export const ErrorNotification: React.FC<Props> = ({
+  errorMessage,
+  setErrorMessage,
+}) => {
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classNames(
+        'notification is-danger is-light has-text-weight-normal',
+        {
+          hidden: !errorMessage,
+        },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={() => setErrorMessage('')}
+      />
+      {errorMessage}
+    </div>
+  );
+};