90.todoList

Write a class named TodoList that is used to create objects that behave like a real-life todo list. Each object should have the following methods:

• add: a function that adds a new todo item to the list. It receives 2 parameters:

  • a string representing a unique id
  • a string with the task to be done

  If there is already a todo item with this id, the function should throw an error with the message "There is already a todo item with this id.".

• remove: a function that removes a todo item with a certain id from the list. It receives 1 parameter:

  • a string named id

  The function shouldn't throw an error if there's no todo item with the given id.

• markAsDone: a function that marks a todo item as done. It receives 1 parameter:

  • a string named id

  If there's no todo item with the given id, the function should throw an error with the message "There is no todo item with this id.".

• getItem: a function that returns a todo item. It receives 1 parameter:

  • a string named id

  If there's no todo item with the given id, the function should return null;

• getAll: a function that returns an Array of todo items. Each item in the array should have 3 properties:

  • id: the id of the todo item
  • task: a description of the task to be done
  • done: a boolean that indicates if the todo item is done or not

  The items in the array should be sorted ascending, by the id property.

const todoList = new TodoList();

todoList.add("groceries", "Buy groceries");
todoList.add("kids", "Pick up kids from school");

console.log(todoList.getItem("groceries"));
// Should print: { id: "groceries", task: "Buy groceries", done: false }

console.log(todoList.getItem("kids"));
// Should print: { id: "kids", task: "Pick up kids from school", done: false }

todoList.markAsDone("groceries");
console.log(todoList.getItem("groceries"));
// Should print: { id: "groceries", task: "Buy groceries", done: true }

todoList.getAll();
/**
 * Should print:
 * [
 *  { id: "groceries", task: "Buy groceries", done: true },
 *  { id: "kids", task: "Pick up kids from school", done: false }
 * ]
 */