4index.ts

#!/usr/bin/env node

import inquirer from "inquirer";
import chalk from "chalk"
import chalkAnimation from "chalk-animation"

//welcome code
let welcome_msg = "\n<== To-Do List ==>\n"
let closing_msg = "\n<== Program Ends ==>"

async function welcome(param:any) {
    let msg = chalkAnimation.rainbow(param)
    let promise = await new Promise<void>((resolve, reject) => {
        setTimeout(()=>{
            msg.stop()
            resolve()
        },1000)
    })
}

async function initialization(){
    let answer = await inquirer.prompt([
        {
            name: "command",
            type: "list",
            message: chalk.yellow("Please Choose An Operation from list:"),
            choices: ["Add Task", "Task List", "Complete Task", "Quit"],
        }
    ])

    switch(answer.command){
        case "Add Task":
            await addTask()
            break
        case "Tasks List":
            await tasksList()
            break
        case "Complete Task":
            await completeTask()
            // break
        case "Quit":
            await welcome(closing_msg)
            process.exit()
            

    } 

}


let task_list:any = []
//add a task
async function addTask(){
    
    do{
        var tasks = await inquirer.prompt([
            {
            name : "task",
            type: "input",
            message:"Add Task Name:",
            choices:["Add Task","Tasks List", "Complete Task"]   
            }        
        ])
        if (tasks.task){
            task_list.push(tasks.task)
            //ask again to add a task
        var tasks_again = await inquirer.prompt([
            {
            name : "task_again",
            type: "list",
            message:chalk.yellow("Do you want to add another Task ?"),
            choices:["Yes", "No"]   
            }
        ])

        if (tasks_again.task_again == "No"){
            await initialization()
        }
        } else{
            console.log(chalk.redBright(`Enter Some Task`))
        }   

        
    }while(tasks.task == "" || tasks_again.task_again == "Yes")
    // console.log(task_list)
    return task_list
}

// display tasks list
async function tasksList(){
    if (task_list.length>0){
        task_list.map((value:any,index:number)=>{
        console.log(`${chalk.greenBright(`Task ${index+1}`)} = ${chalk.greenBright(`${value}`)}`)
        
        })            
    }else{
        console.log(chalk.redBright(`No Task Found\nAdd Some Task First`))
        
    }
        await initialization()
    }
// Mark a task complete in list
async function completeTask(){
        do{
                if(task_list.length > 0){
                    let ans_del = await inquirer.prompt([
                        {
                        name : "deleteIndex",
                        type: "list",
                        message:chalk.yellow("Choose a Task to Mark it Complete:"),
                        choices: task_list
                        }
                    ])
                
                    task_list.splice(task_list.indexOf(ans_del.deleteIndex),1)
                    console.log(chalk.cyanBright("\t*Task Completed Successfully*"))
                
                    var again_ask = await inquirer.prompt([{
                        type: "list",
                        name: "ask",
                        message: chalk.yellow("Do you want to Mark Complete Another Task?"),
                        choices:["Yes","No"]      
                    }])
                    if (again_ask.ask == "No"){
                        await initialization()
                    }
                }else{
                    console.log(chalk.redBright(`No Task Found\nAdd Some Task First`))
                    await initialization()            
                }        
            }while(again_ask.ask=="Yes" )

}

//welcome
await welcome(welcome_msg)
//code initialization
initialization()