index.ts

#!/usr/bin/env node
import inquirer from "inquirer";
import chalk  from "chalk";
import chalkAnimation from "chalk-animation";
import figlet from "figlet";
import gradient from "gradient-string";

const sleep=(ms=1500)=>{
    return new Promise((resolve,rejects)=>{
        setTimeout(resolve,ms)
    })
}
async function shine() {
    console.clear()
    const msg=`ATM M A C H I N E!!!`
    figlet(msg,(err,Data)=>{
        console.log(gradient.pastel.multiline(Data))
    })
};

async function  getStarted() {
    let rainbowTitle=chalkAnimation.rainbow(`
    /$$$$$$  /$$$$$$$$ /$$      /$$       /$$      /$$                     /$$       /$$                          
    /$$__  $$|__  $$__/| $$$    /$$$      | $$$    /$$$                    | $$      |__/                          
    | $$  \ $$   | $$   | $$$$  /$$$$      | $$$$  /$$$$  /$$$$$$   /$$$$$$$| $$$$$$$  /$$ /$$$$$$$   /$$$$$$       
    | $$$$$$$$   | $$   | $$ $$/$$ $$      | $$ $$/$$ $$ |____  $$ /$$_____/| $$__  $$| $$| $$__  $$ /$$__  $$      
    | $$__  $$   | $$   | $$  $$$| $$      | $$  $$$| $$  /$$$$$$$| $$      | $$  \ $$| $$| $$  \ $$| $$$$$$$$      
    | $$  | $$   | $$   | $$\  $ | $$      | $$\  $ | $$ /$$__  $$| $$      | $$  | $$| $$| $$  | $$| $$_____/      
    | $$  | $$   | $$   | $$ \/  | $$      | $$ \/  | $$|  $$$$$$$|  $$$$$$$| $$  | $$| $$| $$  | $$|  $$$$$$$      
    |__/  |__/   |__/   |__/     |__/      |__/     |__/ \_______/ \_______/|__/  |__/|__/|__/  |__/ \_______/   
    \n`)
    await sleep()
    rainbowTitle.stop()
};

await getStarted()

// variable declarations
let usernames:string[] = ["Rubab","admin","F"]
let passwords:string[] = ["2704","admin","F"]
let amounts:any=["500","1000","1500","2500","3000","4000","5000",]

//chalk animation messages 
let welcome_msg = "\n<== Welcome to ATM ==>\n"
let closing_msg = "\n\t<== Transaction Done ==>" 

// authentication questions
const authenticate = [
    {
    type: "input",
    name: "username",
    message: "Enter User ID:",
    validate: validUser

},

{
    type: "password",
    name: "password",
    message:"Enter Password",    
    when:(answers:any)=>answers.username,
    validate: validPassword

}

]
// transaction questions
const selectOperation = [
    {
        type: "list",
        name: "operation",
        message: "Choose an Operation",
        choices:["Withdraw Cash","Deposit Cash","Check Balance","Exit"]
    },
    {
        type:"input",
        name:"withDrawAmount",
        message:"Enter Amount to Withdraw Cash",
        validate:numberValidation,
        when:(answers2:any)=> answers2.operation === "Withdraw Cash"
    },
    {
        type:"input",
        name:"depositCash",
        message:"Enter Amount to Deposit",
        validate:numberValidation,
        when:(answers2:any)=> answers2.operation === "Deposit Cash"
    },
    {
        type:"list",
        name:"exit",
        when:(answers2:any)=> answers2.operation === "Exit",
        choices:()=>process.exit() // this process can be done like "check balance"
    },
]//again prompt
const again = [
    {
        type:"input",
        name:"ask",
        message:"Do You Want Another Transaction (Y|N):"
    }
]
// transactions operations
async function transOperations(authnAnswers:any,operationAnswers:any){
    let userIndex = usernames.indexOf(authnAnswers.username)
    let currentUserAmount = parseFloat(amounts[userIndex])
    let newAmount
    if (operationAnswers.operation === "Check Balance"){        
        console.log(`${chalk.greenBright(`Current Balance`)} = ${chalk.yellowBright(currentUserAmount)}`)
    }else if (operationAnswers.depositCash){
        console.log(`${chalk.redBright(`Previous Balance`)} = ${chalk.yellowBright(currentUserAmount)}`)
        currentUserAmount = currentUserAmount + parseFloat(operationAnswers.depositCash)
        amounts[userIndex] = currentUserAmount
        console.log(`${chalk.greenBright(`New Balance`)} = ${chalk.yellowBright(currentUserAmount)}`)
        

    }else if (operationAnswers.withDrawAmount){
        console.log(`${chalk.redBright(`Previous Balance`)} = ${chalk.yellowBright(currentUserAmount)}`)
        let enteredAmount = parseFloat(operationAnswers.withDrawAmount)
        newAmount = currentUserAmount - enteredAmount
        if(newAmount<0){
            console.log(chalk.redBright("Transaction Invalid !!!\nWithdraw Amount cant Exceed from Available Balance"))
        }else{
            amounts[userIndex] = newAmount
            console.log(`${chalk.greenBright(`New Balance`)} = ${chalk.yellowBright(newAmount)}`)

        }
        
    }
}
// validate number
function numberValidation(amount:string){
    if(amount){
        if (isNaN(parseFloat(amount))){
            return "Enter Amount in Digits"
        }else{
            return true
        }
    }else{
        return "Enter some Value"
    }
}
// validate user ID
function validUser(inUser:string){
    if(inUser){
        if(usernames.includes(inUser)){
            // console.log("Congratulations")
            return true
        }else{
            return "Username in not valid"
        }

    }else{
        return "Enter your User ID"
    }
}
// validate password w.r.t user ID
 function validPassword(inPass:any,answers:any){
    if(inPass){
        if(inPass === passwords[usernames.indexOf(answers.username)]){
        // if(inPass === "rizi"){
            // return authenticate[0].name
            return true
        }else{
            return "Password in Invalid"
        }

    }else{
        return "Enter Your Password"
    }
} 
// welcome function 
async function welcome(input:any){
    let msg = chalkAnimation.rainbow(input)
    await new Promise<void>((resolve, reject) => {
         setTimeout(()=>{
            msg.stop()
            resolve()
        },1000)
    })
    
}

// start of ATM
async function main(){
    const authnAnswers = await inquirer.prompt(authenticate)
    await welcome(welcome_msg)

    do{     
        const operationAnswers = await inquirer.prompt(selectOperation)
        await transOperations(authnAnswers,operationAnswers);
        var agask = await inquirer.prompt(again)
    }while(agask === "Y" || agask.ask === "y")
}


main()