Reduce dot-delimeter string to level object with reduce

buildAssocOpts.js

const db = EXAMPLE_DB;
const expand = "group.permissions.entities.nestedEntities.slug(searchValue)" 

const buildAssocOptions = (str) => {
	return str
		.split('.')
		.reverse()
		.reduce((acc, val, index, arr) => {
			let currentObj = {
				model:
					db[
						val
							.split('_')
							.map((item) => item[0].toUpperCase() + item.substring(1))
							.join('')
					],
				as: val,
				include: {
					...acc,
				},
			};

			if (val == arr.at(1)) {
				delete currentObj.include;

				currentObj = {
					...currentObj,
					where: {
						[arr.at(0).match(/.*?\(/)[0].slice(0, -1)]: arr.at(0).match(/\((.*?)\)/)[1],
					},
				};
			}

			return currentObj;
		}, {});
};