daggerheart/module/data/fields/action/transformField.mjs

import { getWorldActor } from '../../../helpers/utils.mjs';

const fields = foundry.data.fields;

export default class DHSummonField extends fields.SchemaField {
    /**
     * Action Workflow order
     */
    static order = 130;

    constructor(options = {}, context = {}) {
        const transformFields = {
            actorUUID: new fields.DocumentUUIDField({
                type: 'Actor',
                required: true
            }),
            resourceRefresh: new fields.SchemaField({
                hitPoints: new fields.BooleanField({ initial: true }),
                stress: new fields.BooleanField({ initial: true })
            })
        };
        super(transformFields, options, context);
    }

    static async execute() {
        if (!this.transform.actorUUID) {
            ui.notifications.warn(game.i18n.localize('DAGGERHEART.ACTIONS.TYPES.transform.noTransformActor'));
            return false;
        }

        const baseActor = await foundry.utils.fromUuid(this.transform.actorUUID);
        if (!baseActor) {
            ui.notifications.warn(game.i18n.localize('DAGGERHEART.ACTIONS.TYPES.transform.transformActorMissing'));
            return false;
        }

        if (!canvas.scene) {
            ui.notifications.warn(game.i18n.localize('DAGGERHEART.ACTIONS.TYPES.transform.canvasError'));
            return false;
        }

        const activeTokens = this.actor.getActiveTokens().map(x => x.document);
        const controlledMatchingTokens = canvas.tokens.controlled
            .filter(x => x.actor && x.actor.uuid === this.actor.uuid)
            .map(x => x.document);
        const token = this.actor.token ?? (
            activeTokens.length === 1 ? activeTokens[0] :
                (controlledMatchingTokens.length === 1 ? controlledMatchingTokens[0] : null)
        );

        if (!this.actor.token && !token) {
            ui.notifications.warn(game.i18n.localize('DAGGERHEART.ACTIONS.TYPES.transform.linkedSelectedError'));
            return false;
        } 

        if (!token) {
            ui.notifications.warn(game.i18n.localize('DAGGERHEART.ACTIONS.TYPES.transform.prototypeError'));
            return false;
        }

        const actor = await getWorldActor(baseActor);
        const tokenSizes = game.settings.get(CONFIG.DH.id, CONFIG.DH.SETTINGS.gameSettings.Homebrew).tokenSizes;
        const tokenSize = actor?.system.metadata.usesSize ? tokenSizes[actor.system.size] : actor.prototypeToken.width;

        const createdTokens = await canvas.scene.createEmbeddedDocuments(
            'Token', [{
                ...actor.prototypeToken.toObject(),
                actorId: actor.id,
                x: token.x,
                y: token.y,
                width: tokenSize, 
                height: tokenSize,
                level: game.user.viewedLevel,
                elevation: token.elevation
            }],
            { controlObject: true, parent: canvas.scene }
        );
        const createdToken = createdTokens[0];

        /* Swap out previous combatant for a new one if applicable */
        if (token.combatant) {
            const combatantWasSpotlighted = 
                game.combat.turn === game.combat.combatants.contents
                    .sort(game.combat._sortCombatants)
                    .map(x => x.id)
                    .indexOf(token.combatant.id);

            /* Batching combatants update to avoid jumpy UI with multiple rerenders */
            const batch = [
                {
                    action: 'create',
                    documentName: 'Combatant',
                    data: [{ 
                        tokenId: createdToken.id, 
                        sceneId: createdToken.parent.id, 
                        actorId: createdToken.actorId, 
                        hidden: createdToken.hidden 
                    }],
                    parent: game.combat 
                },
                {
                    action: 'delete',
                    documentName: 'Combatant',
                    ids: [token.combatant.id],
                    parent: game.combat
                }
            ];
            await foundry.documents.modifyBatch(batch);

            if (combatantWasSpotlighted) {
                ui.combat.setCombatantSpotlight(createdToken.combatant.id);
            }
        }

        await token.delete();

        const marks = { hitPoints: 0, stress: 0 };
        if (!this.transform.resourceRefresh.hitPoints) {
            marks.hitPoints = Math.min(
                this.actor.system.resources.hitPoints.value,
                token.actor.system.resources.hitPoints.max - 1
            );
        }
        if (!this.transform.resourceRefresh.stress) {
            marks.stress = Math.min(
                this.actor.system.resources.stress.value,
                token.actor.system.resources.stress.max - 1
            );
        }
        if (marks.hitPoints || marks.stress) {
            createdToken.actor.update({
                'system.resources': {
                    hitPoints: { value: marks.hitPoints },
                    stress: { value: marks.stress }
                }
            });
        }

        const prevPosition = { ...this.actor.sheet.position };
        this.actor.sheet.close();
        createdToken.actor.sheet.render({ force: true, position: prevPosition });
    }
}