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98 lines
2.4 KiB
JavaScript
98 lines
2.4 KiB
JavaScript
"use strict";
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const Promise = require("bluebird");
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const memoizee = require("memoizee");
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const DataLoader = require("dataloader");
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const lvm = require("../wrappers/lvm");
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const smartctl = require("../wrappers/smartctl");
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const lsblk = require("../wrappers/lsblk");
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const findmnt = require("../wrappers/findmnt");
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const All = require("../graphql/symbols/all");
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function linearizeDevices(devices) {
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let linearizedDevices = [];
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function add(list) {
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for (let device of list) {
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linearizedDevices.push(device);
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if (device.children != null) {
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add(device.children);
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}
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}
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}
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add(devices);
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return linearizedDevices;
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}
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module.exports = function createLoaders() {
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/* The below is to ensure that commands that produce a full list of all possible items, only ever get called and processed *once* per query, no matter what data is requested. */
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let smartctlScanOnce = memoizee(smartctl.scan);
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let lvmGetPhysicalVolumesOnce = memoizee(lvm.getPhysicalVolumes);
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let lsblkOnce = memoizee(() => {
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return Promise.try(() => {
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return lsblk();
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}).then((devices) => {
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return {
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tree: devices,
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list: linearizeDevices(devices)
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};
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});
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});
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return {
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lsblk: new DataLoader((names) => {
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return Promise.try(() => {
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return lsblkOnce();
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}).then(({tree, list}) => {
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return names.map((name) => {
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if (name === All) {
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return tree;
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} else {
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return list.find((device) => device.name === name);
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}
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});
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});
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}),
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smartctlScan: new DataLoader((paths) => {
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return Promise.try(() => {
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return smartctlScanOnce();
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}).then((devices) => {
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return paths.map((path) => {
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if (path === All) {
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return devices;
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} else {
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return devices.find((device) => device.path === path);
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}
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});
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});
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}),
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smartctlInfo: new DataLoader((paths) => {
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return Promise.map(paths, (path) => {
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return smartctl.info({ devicePath: path });
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});
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}),
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smartctlAttributes: new DataLoader((paths) => {
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return Promise.map(paths, (path) => {
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return smartctl.attributes({ devicePath: path });
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});
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}),
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lvmPhysicalVolumes: new DataLoader((paths) => {
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return Promise.try(() => {
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return lvmGetPhysicalVolumesOnce();
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}).then((volumes) => {
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return paths.map((path) => {
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if (path === All) {
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return volumes;
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} else {
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return volumes.find((device) => device.path === path);
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}
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});
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});
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}),
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};
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}; |