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src/App.tsx

@@ -1,26 +1,311 @@
-/* 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, { FormEvent, useEffect, useRef, useState } from 'react';
+// import { UserWarning } from './UserWarning';
+import {
+  deleteTodos,
+  editTodos,
+  getTodos,
+  postTodos,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { Footer } from './Footer';
+import { TodoList } from './TodoList';
+import classNames from 'classnames';
+import { Filters } from './types/Filters';
+import { TodoItem } from './TodoItem';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
-  }
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [deletingTodoId, setDeletingTodoId] = useState<number | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [addTodoTitle, setAddTodoTitle] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [filterSelected, setFilterSelected] = useState<Filters>(Filters.All);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [updatingStatusIds, setUpdatingStatusIds] = useState<Set<number>>(
+    new Set(),
+  );
+  const [clearingCompletedIds, setClearingCompletedIds] = useState<Set<number>>(
+    new Set(),
+  );
+
+  const [allCompleted, setAllCompleted] = useState(false);
+
+  const ref = useRef<HTMLInputElement | null>(null);
+
+  const updateTodos = (todoId, title) => {
+    // prettier-ignore
+    setTodos(prevState =>
+      title === null
+        ? prevState.filter(todo => todo.id !== todoId)
+        : prevState.map(todo => todoId === todo.id
+          ? { ...todo, title: title } : todo,),
+    );
+  };
+
+  const handleDelete = async (todoId: number) => {
+    setDeletingTodoId(todoId);
+    try {
+      await deleteTodos(todoId);
+      updateTodos(todoId, null);
+      ref.current.focus();
+    } catch (Error) {
+      setError('Unable to delete a todo');
+    }
+  };
+
+  const updateStatus = (todoId, completed) => {
+    // prettier-ignore
+    setTodos(prevState =>
+      prevState.map(todo => todoId === todo.id
+        ? { ...todo, completed: completed } : todo,),
+    );
+  };
+
+  const handleSubmit = async (event: FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    const trimmedTitle = addTodoTitle.trim();
+
+    if (!trimmedTitle) {
+      setError('Title should not be empty');
+
+      return;
+    }
+
+    setTempTodo({
+      id: 0,
+      title: trimmedTitle,
+      completed: false,
+      userId: USER_ID,
+    });
+
+    setIsSubmitting(true);
+    try {
+      const newTodo = {
+        title: trimmedTitle,
+        completed: false,
+        userId: USER_ID,
+      };
+      const createdTodo = await postTodos(newTodo);
+
+      setTodos(prevState => [...prevState, createdTodo]);
+      setTempTodo(null);
+      setAddTodoTitle('');
+    } catch {
+      setError('Unable to add a todo');
+
+      setTempTodo(null);
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  const handleStatus = async (todoId, completed) => {
+    setUpdatingStatusIds(prev => new Set(prev.add(todoId)));
+    const todoToUpdate = todos.find(todo => todo.id === todoId);
+
+    const updatedTodo = {
+      title: todoToUpdate.title,
+      completed: !completed,
+      todoId,
+    };
+
+    try {
+      await editTodos(updatedTodo);
+      updateStatus(todoId, !completed);
+    } catch (Error) {
+      setError('Unable to update a todo');
+    } finally {
+      setUpdatingStatusIds(prev => {
+        const updated = new Set(prev);
+
+        updated.delete(todoId);
+
+        return updated;
+      });
+    }
+  };
+
+  const handleToggleAll = async () => {
+    const IsAllCompleted = todos.every(todo => todo.completed);
+    const todosToUpdate = todos.filter(
+      todo => todo.completed !== !allCompleted,
+    );
+
+    setIsSubmitting(true);
+
+    try {
+      const updatePromises = todosToUpdate.map(async todo => {
+        setUpdatingStatusIds(prev => new Set(prev.add(todo.id)));
+        await editTodos({
+          title: todo.title,
+          completed: !IsAllCompleted,
+          todoId: todo.id,
+        });
+        updateStatus(todo.id, !IsAllCompleted);
+        setUpdatingStatusIds(prev => {
+          const updated = new Set(prev);
+
+          updated.delete(todo.id);
+
+          return updated;
+        });
+      });
+
+      await Promise.all(updatePromises);
+    } catch (Error) {
+      setError('Unable to update a todo');
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  const handleClearCompleted = async () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    setClearingCompletedIds(new Set(completedTodos.map(todo => todo.id)));
+    try {
+      await Promise.all(
+        completedTodos.map(async todo => {
+          await handleDelete(todo.id);
+        }),
+      );
+    } catch {
+      setError('Unable to delete a todo');
+    } finally {
+      setClearingCompletedIds(new Set());
+    }
+  };
+
+  const filteredTodos = () => {
+    if (filterSelected === Filters.Active) {
+      return todos.filter(todo => !todo.completed);
+    }
+
+    if (filterSelected === Filters.Completed) {
+      return todos.filter(todo => todo.completed);
+    }
+
+    return todos;
+  };
+
+  useEffect(() => {
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setError('Unable to load todos');
+      });
+  }, []);
+
+  useEffect(() => {
+    const IsAllCompleted = todos.every(todo => todo.completed);
+
+    setAllCompleted(IsAllCompleted);
+  }, [todos]);
+
+  useEffect(() => {
+    if (error) {
+      const timer = setTimeout(() => {
+        setError(null);
+      }, 3000);
+
+      return () => clearTimeout(timer);
+    }
+  }, [error]);
+
+  useEffect(() => {
+    if (!isSubmitting && ref.current) {
+      ref.current.focus();
+    }
+  }, [isSubmitting]);
 
   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">
+        <header className="todoapp__header">
+          {todos.length !== 0 && (
+            <button
+              disabled={isSubmitting}
+              type="button"
+              className={classNames('todoapp__toggle-all', {
+                active: allCompleted,
+              })}
+              data-cy="ToggleAllButton"
+              onClick={() => handleToggleAll()}
+            />
+          )}
+          <form
+            onSubmit={event => {
+              handleSubmit(event);
+            }}
+          >
+            <input
+              ref={ref}
+              disabled={isSubmitting}
+              data-cy="NewTodoField"
+              type="text"
+              className="todoapp__new-todo"
+              placeholder="What needs to be done?"
+              value={addTodoTitle}
+              onChange={event => {
+                setAddTodoTitle(event.target.value);
+              }}
+            />
+          </form>
+        </header>
+
+        <TodoList
+          todos={filteredTodos()}
+          deletingTodoId={deletingTodoId}
+          updateTodos={updateTodos}
+          updateStatus={updateStatus}
+          setTodos={setTodos}
+          setError={setError}
+          handleDelete={handleDelete}
+          handleStatus={handleStatus}
+          updatingStatusIds={updatingStatusIds}
+          clearingCompletedIds={clearingCompletedIds}
+        />
+
+        {tempTodo && (
+          <TodoItem
+            todo={tempTodo}
+            todos={[]}
+            updateTodos={() => {}}
+            setTodos={() => {}}
+            setError={setError}
+            handleDelete={() => {}}
+            tempTodo={tempTodo}
+          />
+        )}
+        {!!todos.length && (
+          <Footer
+            todos={todos}
+            filterSelected={filterSelected}
+            setFilterSelected={setFilterSelected}
+            handleDelete={handleDelete}
+            clearingCompletedIds={clearingCompletedIds}
+            handleClearCompleted={handleClearCompleted}
+          />
+        )}
+      </div>
+
+      <div
+        data-cy="ErrorNotification"
+        className={`notification is-danger is-light has-text-weight-normal ${error ? '' : 'hidden'}`}
+      >
+        <button
+          data-cy="HideErrorButton"
+          type="button"
+          className="delete"
+          onClick={() => setError(null)}
+        />
+        {error}
+      </div>
+    </div>
   );
 };

src/Footer.tsx

@@ -0,0 +1,52 @@
+import { Todo } from './types/Todo';
+import classNames from 'classnames';
+import { Filters } from './types/Filters';
+
+type Props = {
+  todos: Todo[];
+};
+
+export const Footer: React.FC<Props> = ({
+  todos,
+  filterSelected,
+  setFilterSelected,
+  handleClearCompleted,
+}) => {
+  const remainingTodosCount = todos.filter(todo => !todo.completed).length;
+
+  const filterOptions: Filters[] = Object.values(Filters) as Filters[];
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {remainingTodosCount} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {filterOptions.map((filter: Filters) => (
+          <a
+            key={filter}
+            href={`#/${filter.toLowerCase()}`}
+            className={classNames('filter__link', {
+              selected: filterSelected === filter,
+            })}
+            data-cy={`FilterLink${filter}`}
+            onClick={() => setFilterSelected(filter)}
+          >
+            {filter}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={handleClearCompleted}
+        disabled={todos.every(todo => !todo.completed)}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};