"use strict";

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

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

module.exports = function () {
	let scanOnce = memoizee(smartctl.scan);
	
	return function (paths) {
		return Promise.try(() => {
			return scanOnce();
		}).then((devices) => {
			return paths.map((path) => {
				if (path === All) {
					return devices;
				} else {
					return devices.find((device) => device.path === path);
				}
			});
		});
	};
};