daggerheart/module/data/item/class.mjs

import BaseDataItem from './base.mjs';
import ForeignDocumentUUIDField from '../fields/foreignDocumentUUIDField.mjs';

export default class DHClass extends BaseDataItem {
    /** @inheritDoc */
    static get metadata() {
        return foundry.utils.mergeObject(super.metadata, {
            label: 'TYPES.Item.class',
            type: 'class',
            hasDescription: true
        });
    }

    /** @inheritDoc */
    static defineSchema() {
        const fields = foundry.data.fields;
        return {
            ...super.defineSchema(),
            domains: new fields.ArrayField(new fields.StringField(), { max: 2 }),

            classItems: new fields.ArrayField(new ForeignDocumentUUIDField({ type: 'Item' })),
            evasion: new fields.NumberField({ initial: 0, integer: true }),
            features: new fields.ArrayField(new ForeignDocumentUUIDField({ type: 'Item' })),
            subclasses: new fields.ArrayField(
                new ForeignDocumentUUIDField({ type: 'Item', required: false, nullable: true, initial: undefined })
            ),
            inventory: new fields.SchemaField({
                take: new fields.ArrayField(
                    new ForeignDocumentUUIDField({ type: 'Item', required: false, nullable: true, initial: undefined })
                ),
                choiceA: new fields.ArrayField(
                    new ForeignDocumentUUIDField({ type: 'Item', required: false, nullable: true, initial: undefined })
                ),
                choiceB: new fields.ArrayField(
                    new ForeignDocumentUUIDField({ type: 'Item', required: false, nullable: true, initial: undefined })
                )
            }),
            characterGuide: new fields.SchemaField({
                suggestedTraits: new fields.SchemaField({
                    agility: new fields.NumberField({ initial: 0, integer: true }),
                    strength: new fields.NumberField({ initial: 0, integer: true }),
                    finesse: new fields.NumberField({ initial: 0, integer: true }),
                    instinct: new fields.NumberField({ initial: 0, integer: true }),
                    presence: new fields.NumberField({ initial: 0, integer: true }),
                    knowledge: new fields.NumberField({ initial: 0, integer: true })
                }),
                suggestedPrimaryWeapon: new ForeignDocumentUUIDField({ type: 'Item' }),
                suggestedSecondaryWeapon: new ForeignDocumentUUIDField({ type: 'Item' }),
                suggestedArmor: new ForeignDocumentUUIDField({ type: 'Item' })
            }),
            isMulticlass: new fields.BooleanField({ initial: false })
        };
    }

    async _preCreate(data, options, user) {
        const allowed = await super._preCreate(data, options, user);
        if (allowed === false) return;

        if (this.actor?.type === 'character') {
            const path = data.system.isMulticlass ? 'system.multiclass.value' : 'system.class.value';
            if (foundry.utils.getProperty(this.actor, path)) {
                ui.notifications.error(game.i18n.localize('DAGGERHEART.Item.Errors.ClassAlreadySelected'));
                return false;
            }
        }
    }

    _onCreate(data, options, userId) {
        super._onCreate(data, options, userId);
        if (options.parent?.type === 'character') {
            const path = `system.${data.system.isMulticlass ? 'multiclass.value' : 'class.value'}`;
            options.parent.update({ [path]: `${options.parent.uuid}.Item.${data._id}` });
        }
    }

    _onDelete(options, userId) {
        super._onDelete(options, userId);

        if (options.parent?.type === 'character') {
            const path = `system.${this.isMulticlass ? 'multiclass' : 'class'}`;
            options.parent.update({
                [`${path}.value`]: null
            });

            foundry.utils.getProperty(options.parent, `${path}.subclass`)?.delete();
        }
    }
}