MISC: Use structuredClone() for deep cloning (#1077)

FixJSDOMEnvironment.ts

@@ -1,10 +1,13 @@
 import JSDOMEnvironment from "jest-environment-jsdom";
+import { cloneDeep } from "lodash";
 
 // https://github.com/facebook/jest/blob/v29.4.3/website/versioned_docs/version-29.4/Configuration.md#testenvironment-string
 export default class FixJSDOMEnvironment extends JSDOMEnvironment {
   constructor(...args: ConstructorParameters<typeof JSDOMEnvironment>) {
     super(...args);
 
+    // TODO Tests aren't polyfilled.
+    this.global.structuredClone = cloneDeep;
     // FIXME https://github.com/nodejs/node/issues/35889
     // Add missing importActual() function to mirror requireActual(),
     // which lets us work around the ESM bug.

src/Go/boardState/boardState.ts

@@ -19,7 +19,6 @@ import {
   getBoardFromSimplifiedBoardState,
 } from "../boardAnalysis/boardAnalysis";
 import { endGoGame } from "../boardAnalysis/scoring";
-import { cloneDeep } from "lodash";
 import { addObstacles, resetCoordinates, rotate90Degrees } from "./offlineNodes";
 
 /**
@@ -276,7 +275,7 @@ export function getEmptySpaces(boardState: BoardState): PointState[] {
  * Makes a deep copy of the given board state
  */
 export function getStateCopy(initialState: BoardState) {
-  const boardState = cloneDeep(initialState);
+  const boardState = structuredClone(initialState);
 
   boardState.history = [...initialState.history];
   boardState.previousPlayer = initialState.previousPlayer;

src/NetscriptFunctions.ts

@@ -95,7 +95,7 @@ import { INetscriptExtra } from "./NetscriptFunctions/Extra";
 import { ScriptDeath } from "./Netscript/ScriptDeath";
 import { getBitNodeMultipliers } from "./BitNode/BitNode";
 import { assert, arrayAssert, stringAssert, objectAssert } from "./utils/helpers/typeAssertion";
-import { cloneDeep, escapeRegExp } from "lodash";
+import { escapeRegExp } from "lodash";
 import numeral from "numeral";
 import { clearPort, peekPort, portHandle, readPort, tryWritePort, writePort, nextPortWrite } from "./NetscriptPort";
 import { FilePath, resolveFilePath } from "./Paths/FilePath";
@@ -1679,17 +1679,17 @@ export const ns: InternalAPI<NSFull> = {
   getPlayer: () => () => {
     const data = {
       // Person
-      hp: cloneDeep(Player.hp),
-      skills: cloneDeep(Player.skills),
-      exp: cloneDeep(Player.exp),
-      mults: cloneDeep(Player.mults),
+      hp: structuredClone(Player.hp),
+      skills: structuredClone(Player.skills),
+      exp: structuredClone(Player.exp),
+      mults: structuredClone(Player.mults),
       city: Player.city,
       // Player-specific
       numPeopleKilled: Player.numPeopleKilled,
       money: Player.money,
       location: Player.location,
       totalPlaytime: Player.totalPlaytime,
-      jobs: cloneDeep(Player.jobs),
+      jobs: structuredClone(Player.jobs),
       factions: Player.factions.slice(),
       entropy: Player.entropy,
     };

src/NetscriptFunctions/CodingContract.ts

@@ -65,11 +65,7 @@ export function NetscriptCodingContract(): InternalAPI<ICodingContract> {
       const filename = helpers.string(ctx, "filename", _filename);
       const hostname = _hostname ? helpers.string(ctx, "hostname", _hostname) : ctx.workerScript.hostname;
       const contract = getCodingContract(ctx, hostname, filename);
-      const data = contract.getData();
-      if (Array.isArray(data)) {
-        // For multi-dimensional arrays, we have to copy the internal arrays as well
-        return JSON.parse(JSON.stringify(data));
-      } else return data;
+      return structuredClone(contract.getData());
     },
     getDescription: (ctx) => (_filename, _hostname?) => {
       const filename = helpers.string(ctx, "filename", _filename);

src/NetscriptFunctions/Corporation.ts

@@ -6,7 +6,7 @@ import { Material } from "../Corporation/Material";
 import { Warehouse } from "../Corporation/Warehouse";
 import { Division } from "../Corporation/Division";
 import { Corporation, CorporationResolvers } from "../Corporation/Corporation";
-import { cloneDeep, omit } from "lodash";
+import { omit } from "lodash";
 import { setDeprecatedProperties } from "../utils/DeprecationHelper";
 import {
   Corporation as NSCorporation,
@@ -248,7 +248,7 @@ export function NetscriptCorporation(): InternalAPI<NSCorporation> {
       const materialName = getEnumHelper("CorpMaterialName").nsGetMember(ctx, _materialName, "materialName");
       const material = getMaterial(divisionName, cityName, materialName);
       const corporation = getCorporation();
-      const exports = cloneDeep(material.exports);
+      const exports = structuredClone(material.exports);
       return {
         marketPrice: material.marketPrice,
         desiredSellPrice: material.desiredSellPrice,
@@ -277,7 +277,7 @@ export function NetscriptCorporation(): InternalAPI<NSCorporation> {
         competition: corporation.unlocks.has(CorpUnlockName.MarketDataCompetition) ? product.competition : undefined,
         rating: product.rating,
         effectiveRating: cityData.effectiveRating,
-        stats: cloneDeep(product.stats),
+        stats: structuredClone(product.stats),
         productionCost: cityData.productionCost,
         desiredSellPrice: cityData.desiredSellPrice,
         desiredSellAmount: cityData.desiredSellAmount,
@@ -626,21 +626,21 @@ export function NetscriptCorporation(): InternalAPI<NSCorporation> {
     hasCorporation: () => () => !!Player.corporation,
     getConstants: (ctx) => () => {
       checkAccess(ctx);
-      /* TODO 2.2: possibly just rework the whole corp constants structure to be more readable, and just use cloneDeep
-       *           to provide it directly to player.
+      /* TODO 2.2: possibly just rework the whole corp constants structure to be more readable, and just use
+       *           structuredClone to provide it directly to player.
        * TODO 2.2: Roll product information into industriesData, there's no reason to look up a product separately */
       // TODO: add functions for getting materialInfo and research info
-      return cloneDeep(omit(corpConstants, "fundingRoundShares", "fundingRoundMultiplier", "valuationLength"));
+      return structuredClone(omit(corpConstants, "fundingRoundShares", "fundingRoundMultiplier", "valuationLength"));
     },
     getIndustryData: (ctx) => (_industryName) => {
       checkAccess(ctx);
       const industryName = getEnumHelper("IndustryType").nsGetMember(ctx, _industryName, "industryName");
-      return cloneDeep(IndustriesData[industryName]);
+      return structuredClone(IndustriesData[industryName]);
     },
     getMaterialData: (ctx) => (_materialName) => {
       checkAccess(ctx);
       const materialName = getEnumHelper("CorpMaterialName").nsGetMember(ctx, _materialName, "materialName");
-      return cloneDeep(MaterialInfo[materialName]);
+      return structuredClone(MaterialInfo[materialName]);
     },
     expandIndustry: (ctx) => (_industryName, _divisionName) => {
       checkAccess(ctx);

src/NetscriptFunctions/Infiltration.ts

@@ -1,5 +1,5 @@
 import type { InternalAPI, NetscriptContext } from "../Netscript/APIWrapper";
-import { Infiltration as NetscriptInfiltation, InfiltrationLocation } from "@nsdefs";
+import { Infiltration as NetscriptInfiltation, InfiltrationLocation, ILocation } from "@nsdefs";
 import { FactionName, LocationName } from "@enums";
 import { Location } from "../Locations/Location";
 import { Locations } from "../Locations/Locations";
@@ -29,7 +29,7 @@ export function NetscriptInfiltration(): InternalAPI<NetscriptInfiltation> {
     const reward = calculateReward(startingSecurityLevel);
     const maxLevel = location.infiltrationData.maxClearanceLevel;
     return {
-      location: JSON.parse(JSON.stringify(location)),
+      location: structuredClone(location) as ILocation,
       reward: {
         tradeRep: calculateTradeInformationRepReward(reward, maxLevel, startingSecurityLevel),
         sellCash: calculateSellInformationCashReward(reward, maxLevel, startingSecurityLevel),

src/NetscriptFunctions/Sleeve.ts

@@ -10,7 +10,6 @@ import { isSleeveBladeburnerWork } from "../PersonObjects/Sleeve/Work/SleeveBlad
 import { isSleeveFactionWork } from "../PersonObjects/Sleeve/Work/SleeveFactionWork";
 import { isSleeveCompanyWork } from "../PersonObjects/Sleeve/Work/SleeveCompanyWork";
 import { helpers } from "../Netscript/NetscriptHelpers";
-import { cloneDeep } from "lodash";
 import { getAugCost } from "../Augmentation/AugmentationHelpers";
 import { Factions } from "../Faction/Factions";
 
@@ -161,10 +160,10 @@ export function NetscriptSleeve(): InternalAPI<NetscriptSleeve> {
       const sl = Player.sleeves[sleeveNumber];
 
       const data = {
-        hp: cloneDeep(sl.hp),
-        skills: cloneDeep(sl.skills),
-        exp: cloneDeep(sl.exp),
-        mults: cloneDeep(sl.mults),
+        hp: structuredClone(sl.hp),
+        skills: structuredClone(sl.skills),
+        exp: structuredClone(sl.exp),
+        mults: structuredClone(sl.mults),
         city: sl.city,
         shock: sl.shock,
         sync: sl.sync,

src/NetscriptFunctions/StockMarket.ts

@@ -20,7 +20,6 @@ import { Stock } from "../StockMarket/Stock";
 import { StockOrder, TIX } from "@nsdefs";
 import { InternalAPI, NetscriptContext } from "../Netscript/APIWrapper";
 import { helpers } from "../Netscript/NetscriptHelpers";
-import { cloneDeep } from "lodash";
 import { StockMarketConstants } from "../StockMarket/data/Constants";
 
 export function NetscriptStockMarket(): InternalAPI<TIX> {
@@ -44,7 +43,7 @@ export function NetscriptStockMarket(): InternalAPI<TIX> {
   };
 
   return {
-    getConstants: () => () => cloneDeep(StockMarketConstants),
+    getConstants: () => () => structuredClone(StockMarketConstants),
     hasWSEAccount: () => () => Player.hasWseAccount,
     hasTIXAPIAccess: () => () => Player.hasTixApiAccess,
     has4SData: () => () => Player.has4SData,

src/ScriptEditor/ui/themes.ts

@@ -1,7 +1,6 @@
 import type { editor } from "monaco-editor";
 import { getRecordKeys } from "../../Types/Record";
 import { Settings } from "../../Settings/Settings";
-import { cloneDeep } from "lodash";
 type DefineThemeFn = typeof editor.defineTheme;
 
 export interface IScriptEditorTheme {
@@ -76,7 +75,7 @@ const colorRegExp = /^#?([0-9A-Fa-f]{6})([0-9A-Fa-f]{2})?$/;
 // Invalid data will be replaced with FF0000 (bright red)
 export const sanitizeTheme = (theme: IScriptEditorTheme): void => {
   if (typeof theme !== "object") {
-    Settings.EditorTheme = cloneDeep(defaultMonacoTheme);
+    Settings.EditorTheme = structuredClone(defaultMonacoTheme);
     return;
   }
   for (const themeKey of getRecordKeys(theme)) {