ds4/src/module/actor/actor.ts

import { DS4Item } from "../item/item";
import { DS4ItemDataType } from "../item/item-data";
import { DS4ActorDataType, ModifiableData } from "./actor-data";

export class DS4Actor extends Actor<DS4ActorDataType, DS4ItemDataType, DS4Item> {
    /** @override */
    prepareDerivedData(): void {
        const data = this.data;
        const attributes = data.data.attributes;
        Object.values(attributes).forEach(
            (attribute: ModifiableData<number>) => (attribute.total = attribute.base + attribute.mod),
        );

        const traits = data.data.traits;
        Object.values(traits).forEach((trait: ModifiableData<number>) => (trait.total = trait.base + trait.mod));

        const combatValues = data.data.combatValues;
        Object.values(combatValues).forEach(
            (combatValue: ModifiableData<number>) => (combatValue.total = combatValue.base + combatValue.mod),
        );

        combatValues.hitPoints.max = combatValues.hitPoints.total;
    }
}