index.js

#!/usr/bin/env node

const program = require("commander")
const prompts = require("prompts")

const {
  addTask,
  updateTask,
  removeTask,
  getTasks,
  updateTasks,
  listTasks,
  reset,
  loadUserSettings,
  initializeUser,
  makeTaskPrompts,
} = require("./tasks")

// Task Questions
const taskQuestions = [
  {
    type: "text",
    name: "title",
    message: "Task Title: ",
  },
]

program.description("To-Do List CLI")

program.configureHelp({
  sortSubcommands: true,
  sortOptions: true,
})

program
  .arguments("[task]")
  .option("-l, --list", "list all tasks")
  .option("-a, --add", "add a task")
  .option("-u, --update", "update a task")
  .option("-r, --remove", "remove a task")
  .addHelpCommand(false)
  .action((task, options) => {
    switch (true) {
      case task != undefined: // $todo "My Task"
        addTask({
          title: task.toString(),
          is_completed: false,
          created_on: Date(),
        })
        break

      case options.add: // $todo -a
        prompts(taskQuestions).then((response) => {
          addTask({
            title: response.title,
            is_completed: false,
            created_on: Date(),
          })
        })
        break
      case options.update: // $todo -u
        getTasks().then(function (tasks) {
          const taskPrompts = makeTaskPrompts(tasks)

          // Prompt to select a task
          prompts({
            type: "select",
            name: "task",
            message: "Choose a task to update:",
            choices: taskPrompts,
          }).then((selectResponse) => {
            if (selectResponse) {
              // Prompt to update Task
              prompts(taskQuestions).then((renameResponse) => {
                if (renameResponse.title) {
                  updateTask(tasks[selectResponse.task]._id, {
                    title: renameResponse.title,
                    is_completed: tasks[selectResponse.task].is_completed,
                    created_on: tasks[selectResponse.task].created_on,
                  })
                }
              })
            }
          })
        })
        break
      case options.remove: // $todo -r
        getTasks().then(function (tasks) {
          if (tasks.length == 0) {
            console.info("You currently have no tasks.")
            console.info("Create a task using: todo [task]")
            console.info('e.g.: todo "Get groceries"')
            return
          }

          const taskPrompts = makeTaskPrompts(tasks)

          prompts({
            type: "select",
            name: "task",
            message: "Choose a task to remove:",
            choices: taskPrompts,
          }).then((selectResponse) => {
            if (selectResponse) {
              // prompt for Task Title
              removeTask(tasks[selectResponse.task]._id)
            }
          })
        })
        break
      case options.list: // $todo -l
        listTasks()
        break
      default:
        // $todo
        const getTasksPromise = getTasks()
        const getUserSettingsPromise = loadUserSettings()

        Promise.allSettled([getTasksPromise, getUserSettingsPromise]).then(
          (results) => {
            tasks = results[0].value
            userSettings = results[1].value

            if (tasks.length == 0) {
              console.log("You currently have no tasks.")
              console.log("Create a task using: todo [task]")
              console.log('e.g.: todo "Get groceries"')
              return
            }

            const taskPrompts = makeTaskPrompts(tasks)

            prompts({
              type: "multiselect",
              name: "tasks",
              message: "Your tasks:",
              choices: taskPrompts,
              instructions: !userSettings, // Show instructions for the first time,
            }).then((response) => {
              if (response.tasks) {
                for (let index = 0; index < tasks.length; index++) {
                  if (response.tasks.includes(index)) {
                    tasks[index].is_completed = true
                  } else {
                    tasks[index].is_completed = false
                  }
                }
                updateTasks(tasks)

                // If it's the first time, initialize user to prevent instructions to be shown from then on
                if (!userSettings) initializeUser()
              }
            })
          }
        )
        break
    }
  })

program
  .command("reset")
  .description("Reset the ToDo CLI Database")
  .action(() => reset())

try {
  program.parse(process.argv)
} catch (error) {
  console.log(error)
}