foundry-sw5e/module/combat.js

/**
 * Override the default Initiative formula to customize special behaviors of the SW5e system.
 * Apply advantage, proficiency, or bonuses where appropriate
 * Apply the dexterity score as a decimal tiebreaker if requested
 * See Combat._getInitiativeFormula for more detail.
 */
export const _getInitiativeFormula = function () {
    const actor = this.actor;
    if (!actor) return "1d20";
    const init = actor.data.data.attributes.init;

    // Construct initiative formula parts
    let nd = 1;
    let mods = "";
    if (actor.getFlag("sw5e", "halflingLucky")) mods += "r1=1";
    if (actor.getFlag("sw5e", "initiativeAdv")) {
        nd = 2;
        mods += "kh";
    }
    const parts = [
        `${nd}d20${mods}`,
        init.mod,
        init.prof !== 0 ? init.prof : null,
        init.bonus !== 0 ? init.bonus : null
    ];

    // Optionally apply Dexterity tiebreaker
    const tiebreaker = game.settings.get("sw5e", "initiativeDexTiebreaker");
    if (tiebreaker) parts.push(actor.data.data.abilities.dex.value / 100);
    return parts.filter((p) => p !== null).join(" + ");
};