daggerheart/module/data/regionBehavior/applyActiveEffect.mjs

export default class DhApplyActiveEffect extends CONFIG.RegionBehavior.dataModels.applyActiveEffect {
    static async #getApplicableEffects(token) {
        const effects = await Promise.all(this.effects.map(fromUuid));
        return (effects).filter(effect => !effect.system.targetDispositions.size || effect.system.targetDispositions.has(token.disposition));
    }

    static async #onTokenEnter(event) {
        if ( !event.user.isSelf ) return;
        const {token, movement} = event.data;
        const actor = token.actor;
        if ( !actor ) return;
        const resumeMovement = movement ? token.pauseMovement() : undefined;
        const effects = await DhApplyActiveEffect.#getApplicableEffects.bind(this)(event.data.token);
        const toCreate = [];
        for ( const effect of effects ) {
        const data = effect.toObject();
        delete data._id;
        if ( effect.compendium ) {
            data._stats.duplicateSource = null;
            data._stats.compendiumSource = effect.uuid;
        } else {
            data._stats.duplicateSource = effect.uuid;
            data._stats.compendiumSource = null;
        }
        data._stats.exportSource = null;
        data.origin = this.parent.uuid;
        toCreate.push(data);
        }
        if ( toCreate.length ) await actor.createEmbeddedDocuments("ActiveEffect", toCreate);
        await resumeMovement?.();
    }

  /** @override */
  static events = {
    ...CONFIG.RegionBehavior.dataModels.applyActiveEffect.events,
    [CONST.REGION_EVENTS.TOKEN_ENTER]: this.#onTokenEnter,
  }; 
}