A script I wrote to solve a telephone CTF challenge.

script.js

/*
Challenge Description:
Have you ever used an old-keypad mobile phone?
(Check out the image file)

7 -----> 7 

E -----> 333 

T -----> 88 

The flag is the numeral sum of the code in the text file.

"AGENT007" -----> 22.44.333.666.88.0.0.7 -----> 2+2+4+4+3+3+3+6+6+6+8+8+0+0+7 = 62 

NOTE: You only have 3 attempts to solve this challenge, so use them carefully. 

Hint: It is recommended to write a script to finish this task accurately.
*/
const fs = require('fs');
let array = fs.readFileSync('./challenge_code.txt').toString().split("");

let sum = 0;
const dictionary = {
    1: "1",
    2: "2ABC",
    3: "3DEF",
    4: "4GHI",
    5: "5JKL",
    6: "6MNO",
    7: "7PQRS",
    8: "8TUV",
    9: "9WXYZ",
    0: "0"

}

const keyArray = Object.values(dictionary);
const valueArray = Object.keys(dictionary);

for (let i = 0; i < array.length; i++) {
    //First, we find out which key it is on
    for (let y = 0; y < keyArray.length; y++) {
        if (keyArray[y].indexOf(array[i].toUpperCase()) >= 0) {
            //We found out which key it belongs to!
            sum += parseInt(valueArray[y]) + parseInt(valueArray[y] * keyArray[y].indexOf(array[i].toUpperCase()));
            break; //Stop loop
        }
    }
}

//Tada!
console.log(sum);