"use strict";

const Promise = require("bluebird");
const memoizee = require("memoizee");

const lvm = require("../../../packages/exec-lvm");
const All = require("../../../packages/graphql-interface/symbols/all");

module.exports = function () {
	let getVolumeGroupsOnce = memoizee(lvm.getVolumeGroups);

	return function (names) {
		return Promise.try(() => {
			return getVolumeGroupsOnce();
		}).then((result) => {
			return result.groups;
		}).then((groups) => {
			return names.map((name) => {
				if (name === All) {
					return groups;
				} else {
					return groups.find((group) => group.name === name);
				}
			});
		});
	};
};