FoundryVTT script to roll 4d6, rerolling all 1s and 2s infinitely, then discarding the lowest die

fvtt_v0.6.6_roll_4d6_reroll_lte_2_discard_lowest.js

//Create a new roll for 4d6 and roll it
let roll = new Roll('4d6').roll();

//Convert to json
let rjson = roll.toJSON();

//Manually set properties
rjson.formula = "4d6r<=2dl1";
rjson.dice[0].formula = rjson.formula;

//Create a new empty array
let newrolls = Array();

//Reroll 1s and 2s
rjson.dice[0].rolls.forEach(r => {
    //Loop all individual dice results and modify them if necessary
    if (r.roll < 3) {
        //Set die to  rerolled
        r.rerolled = true;

        //infinitely roll dice until it's not a 1 or 2
        let rnewval = 0;
        while (rnewval < 3) {
            console.log("rerolling");
            rnewval = new Roll('1d6').roll().total;
        }

        //Add the new die to the newrolls array
        newrolls.push({
            "roll": rnewval
        });
    }
});

//Combine existing rolls and new rolls
rjson.dice[0].rolls = rjson.dice[0].rolls.concat(newrolls);


//Find lowest active die and drop it
let lowestValueIndex = 0;
rjson.dice[0].rolls.forEach((r, index, arr) => {
    if(!is_active(r) && lowestValueIndex == index) {
        lowestValueIndex++;
    }
    else if (is_active(r) && r.roll < arr[lowestValueIndex].roll) {
        lowestValueIndex = index;
    }
});
//drop the lowest die
rjson.dice[0].rolls[lowestValueIndex].discarded = true;

//Total up new rolls for active dice only
let newtotal = 0;

rjson.dice[0].rolls.forEach(r => {
    if (is_active(r)) {
        newtotal += r.roll;
    }
});

//Set new totals
rjson.result = newtotal.toString();
rjson.total = newtotal;

//Recreate roll object from json
roll = Roll.fromData(rjson);

//Send roll to chat
roll.toMessage();


function is_active(r) {
    if(!r.hasOwnProperty('rerolled') && !r.hasOwnProperty('discarded')) {
        return true;
    }
    return false;
}

fvtt_v0.7.4_roll_4d6_reroll_lte_2_discard_lowest.js

//Create a new roll for 4d6 and roll it
let roll = new Roll('4d6').roll();

//Convert to json
let rjson = roll.toJSON();

//Manually set properties
rjson.formula = "4d6r<=2dl1";
rjson.terms[0].modifers = ["r<=2","dl1"];

//Create a new empty array
let newrolls = Array();

//Reroll 1s and 2s
rjson.terms[0].results.forEach(r => {
    //Loop all individual dice results and modify them if necessary
    if (r.result < 3) {
        //Set die to inactive and rerolled
        r.active = false;
        r.rerolled = true;

        //infinitely roll dice until it's not a 1 or 2
        let rnewval = 0;
        while (rnewval < 3) {
            console.log("rerolling");
            rnewval = new Roll('1d6').roll().total;
        }

        //Add the new die to the newrolls array
        newrolls.push({
            "result": rnewval,
            "active": true
        });
    }
});

//Combine existing rolls and new rolls
rjson.terms[0].results = rjson.terms[0].results.concat(newrolls);


//Find lowest active die and drop it
let lowestValueIndex = 0;
rjson.terms[0].results.forEach((r, index, arr) => {
    if(!r.active && lowestValueIndex == index) {
        lowestValueIndex++;
    }
    else if (r.active && r.result < arr[lowestValueIndex].result) {
        lowestValueIndex = index;
    }
});
//drop the lowest die
rjson.terms[0].results[lowestValueIndex].active = false;
rjson.terms[0].results[lowestValueIndex].discarded = true;

//Total up new rolls for active dice only
let newtotal = 0;

rjson.terms[0].results.forEach(r => {
    if (r.active) {
        newtotal += r.result;
    }
});

//Set new totals
rjson.results = [newtotal];
rjson.total = newtotal;

//Recreate roll object from json
roll = Roll.fromData(rjson);

//Send roll to chat
roll.toMessage();