CRUD for tasks on local storage.

tasks-crud-local-storage.js

import { v4 as uuidv4 } from 'uuid';

const TASKS_KEY = 'tasks';

export const retrieveTasks = () => {
  const serialized = localStorage.getItem(TASKS_KEY);
  const tasks = serialized ? JSON.parse(serialized) : [];
  return tasks;
};

export const persistTasks = (tasks) => {
  localStorage.setItem(TASKS_KEY, JSON.stringify(tasks));
}

export default {
  create: async (taskData = {}) => {
    if (!taskData.description || !taskData.description.trim()) {
      throw new Error('Description is required.');
    }

    const existingTasks = retrieveTasks();
    const creatingTask = {
      uuid: uuidv4(),
      ...taskData,
    };
    persistTasks([...existingTasks, creatingTask]);

    return creatingTask;
  },
  read: async () => {
    return retrieveTasks();
  },
  update: async (uuid, taskData = {}) => {
    const existingTasks = retrieveTasks();
    const updatingTask = { ...taskData, uuid };
    persistTasks(existingTasks.map(task => task.uuid === uuid
      ? updatingTask
      : task
    ));

    return updatingTask;
  },
  delete: async (uuid) => {
    const existingTasks = retrieveTasks();
    persistTasks(existingTasks.filter(task => task.uuid !== uuid));

    return { uuid };
  },
};