foundry-dice-stats.js

// this macro gets all the d20 rolled in a session and spits back what is the avg roll and all rolled d20 results.
// // step one, get all the messages with a d20 roll in them.
let arrays = {}
//let rollArray = []
let rollResult = 0;
let rollMessages = game.messages.entities.filter(m => m.roll?.formula?.includes("d20") == true)
// // step two, get the rolled dice.
for (let message of rollMessages) { // takes an individual message from the rollMessages object.
    let player = message.user.data.name;
    for (let dice of message.roll.dice) { // allows us to check when there is multiple different die used in the formula if we are actually checking a d20.
        let array = arrays[player] || []
        if (dice.faces == 20) {
            for (let rollDone of dice.results) { // here we seperate the die rolls of multiple dice of the same kind. eg. when advantage was rolled
                rollResult = rollDone.result;
                array.push(rollResult); // here we combine all the results in an array.
            }
        }
        arrays[player] = array;
    }
}
// step three, the results.

let result = {};
for (let name in arrays) {
    let diceRolls = arrays[name];
    let sumRolls = diceRolls.reduce(function(a, b) {
        return a + b;
    });
    let average = sumRolls / diceRolls.length;
    let rounded = (Math.round(average * 100) / 100).toFixed(2);
    result[name] = {"average": rounded, "nr_of_rolls": diceRolls.length}
}

let message = "<br>";
for (let name in result) {
    message = message + `${name}: rolled ${result[name].nr_of_rolls} dies, average of ${result[name].average}<br>`
}
console.log(message);
ChatMessage.create({flavor: 'Dice stats:', content: message});