A simple dice generator for dungeons and dragons

roll_dice.js

/**
 * @returns { 
 *    diceRoll:[int number that dices roll],
 *    number: int(sum of dices),
 *    bonus: int,
 *    total: number+bonus
 * }
 */
function diceRoll(data){
    // data val sample '1d8+12'
    // data val sample '4d8-10'
    // data val sample 'd8+2'
    data=' '+data;
    var dataSplit=data.split(/-|\+|d/g);
    var dices=parseInt(dataSplit[0],10);
    if(!dices){
        dices=1;
    }
    var sides=parseInt(dataSplit[1],10);
    
    var ret={ diceRoll:[], number:0, bonus:0 };
    
    ret.number=0;
    var n;
    for(var i=0;i<dices;i++){
        n=1+Math.floor(Math.random() * sides);
        ret.diceRoll.push(n);
        ret.number+=n;
    }
    
    
    
    if(dataSplit[2]){
        ret.bonus=parseInt(dataSplit[2],10);
        if(data.indexOf('-')>-1){
            ret.bonus=ret.bonus*-1;
        }
    }

    ret.total=ret.number+ret.bonus;

    return ret;
}