TimeConversionChallengeAndInvertString.js

const inverteString = (stringOriginal) => 
{
    let aux = "";
    let size = stringOriginal.length;
    for(i = (size - 1); i <= (size) && i >=0; i--)
    {   
        aux += stringOriginal[i];
        //console.log(aux);
    }
    return aux;
};

let IsMorning = function(stringOriginal)
{ 
    aux = stringOriginal.search('AM');
    let reducao;
    if(stringOriginal[aux])
    {
        reducao = true;
    }
    else
    {
        reducao = false;
    }
    return reducao;
};

let getDate = stringOriginal => { return stringOriginal.substring(0, 2); };

const convertTime = timeString => 
{
    timeString = timeString.trim();
    //timeString = timeString.replace(':','').replace(':','');
    
    let novoHorario = parseInt(getDate(timeString));

    if(IsMorning(timeString))
    {
        if(novoHorario != 12)
        {
            novoHorario =  00.toString() + novoHorario;    
            timeString = novoHorario.toString() + timeString.substring(2,8);
        }
        else
        {
            timeString = novoHorario.toString() + timeString.substring(2,8);
        }
    }
    else
    {
        novoHorario = novoHorario + 12;
        timeString = novoHorario.toString() + timeString.substring(2,8);
    }
    
    if(parseInt(getDate(timeString)) == 24)
    {
        timeString = "00"+ timeString.substring(2,8);
    }
    return timeString;
};







//Assertividade!

console.log(inverteString('MindFuck'));
console.log(convertTime('07:45:05PM'));
console.log(convertTime('07:45:05AM'));
console.log(convertTime('12:00:00PM'));
console.log(convertTime('12:00:00AM'));
console.log(convertTime('08:00:00PM'));
console.log(convertTime('08:00:00AM'));