export default class ItemHelpers {
    static async itemUpdate(event, formData) {
        formData = expandObject(formData);

        if (this.object.isOwned && this.object.actor?.compendium?.metadata) {
            return;
        }

        // Handle the free-form modifications list
        const formAttrs = expandObject(formData)?.data?.modifications || {};

        const modifications = Object.values(formAttrs).reduce((obj, v) => {
            let k = v["key"].trim();
            delete v["key"];
            obj[k] = v;
            return obj;
        }, {});

        // Remove modifications which are no longer used
        if (this.object.data?.data?.modifications) {
            for (let k of Object.keys(this.object.data.data.modifications)) {
                if (!modifications.hasOwnProperty(k)) modifications[`-=${k}`] = null;
            }
        }

        // recombine modifications to formData
        if (Object.keys(modifications).length > 0) {
            setProperty(formData, `data.modifications`, modifications);
        }

        // Update the Item
        this.item.data.flags.loaded = false;
        this.object.update(formData);
    }
}