MISC: refactor weaken effect calculation (#1076)

so far we calculate the effect of weaken in three +1 places
ns.weaken
ns.weakenAnalyze
terminal weaken

and server.weaken where the bn mult is applied

i extracted the logic into a new netscript helper function getWeakenEffect
this gives us one place if we want to change the formula

a side effect i added the server.cpuCores to the terminal weaken to future proof it if the npc server core pr (#963) is merged

src/NetscriptFunctions.ts

@@ -36,6 +36,7 @@ import {
   processSingleServerGrowth,
   safelyCreateUniqueServer,
   getCoreBonus,
+  getWeakenEffect,
 } from "./Server/ServerHelpers";
 import {
   getPurchasedServerUpgradeCost,
@@ -380,9 +381,7 @@ export const ns: InternalAPI<NSFull> = {
         helpers.log(ctx, () => "Server is null, did it die?");
         return Promise.resolve(0);
       }
-      const cores = host.cpuCores;
-      const coreBonus = getCoreBonus(cores);
-      const weakenAmt = ServerConstants.ServerWeakenAmount * threads * coreBonus;
+      const weakenAmt = getWeakenEffect(threads, host.cpuCores);
       server.weaken(weakenAmt);
       ctx.workerScript.scriptRef.recordWeaken(server.hostname, threads);
       const expGain = calculateHackingExpGain(server, Player) * threads;
@@ -396,7 +395,7 @@ export const ns: InternalAPI<NSFull> = {
       ctx.workerScript.scriptRef.onlineExpGained += expGain;
       Player.gainHackingExp(expGain);
       // Account for hidden multiplier in Server.weaken()
-      return Promise.resolve(weakenAmt * currentNodeMults.ServerWeakenRate);
+      return Promise.resolve(weakenAmt);
     });
   },
   weakenAnalyze:
@@ -404,8 +403,7 @@ export const ns: InternalAPI<NSFull> = {
     (_threads, _cores = 1) => {
       const threads = helpers.number(ctx, "threads", _threads);
       const cores = helpers.number(ctx, "cores", _cores);
-      const coreBonus = getCoreBonus(cores);
-      return ServerConstants.ServerWeakenAmount * threads * coreBonus * currentNodeMults.ServerWeakenRate;
+      return getWeakenEffect(threads, cores);
     },
   share: (ctx) => () => {
     const cores = helpers.getServer(ctx, ctx.workerScript.hostname).cpuCores;

src/Script/ScriptHelpers.ts

@@ -3,14 +3,13 @@ import { Player } from "@player";
 import { BaseServer } from "../Server/BaseServer";
 import { Server } from "../Server/Server";
 import { RunningScript } from "./RunningScript";
-import { processSingleServerGrowth } from "../Server/ServerHelpers";
+import { getWeakenEffect, processSingleServerGrowth } from "../Server/ServerHelpers";
 import { GetServer } from "../Server/AllServers";
 import { formatPercent } from "../ui/formatNumber";
 import { workerScripts } from "../Netscript/WorkerScripts";
 import { scriptKey } from "../utils/helpers/scriptKey";
 
 import type { ScriptFilePath } from "../Paths/ScriptFilePath";
-import { ServerConstants } from "../Server/data/Constants";
 
 export function scriptCalculateOfflineProduction(runningScript: RunningScript): void {
   //The Player object stores the last update time from when we were online
@@ -83,8 +82,8 @@ export function scriptCalculateOfflineProduction(runningScript: RunningScript):
         ((0.5 * runningScript.dataMap[hostname][3]) / runningScript.onlineRunningTime) * timePassed,
       );
       runningScript.log(`Called weaken() on ${serv.hostname} ${timesWeakened} times while offline`);
-      const coreBonus = 1 + (host.cpuCores - 1) / 16;
-      serv.weaken(ServerConstants.ServerWeakenAmount * timesWeakened * coreBonus);
+      const weakenAmount = getWeakenEffect(runningScript.threads, host.cpuCores);
+      serv.weaken(weakenAmount * timesWeakened);
     }
   }
 }

src/Server/Server.ts

@@ -141,7 +141,7 @@ export class Server extends BaseServer {
 
   /** Lowers the server's security level (difficulty) by the specified amount) */
   weaken(amt: number): void {
-    this.hackDifficulty -= amt * currentNodeMults.ServerWeakenRate;
+    this.hackDifficulty -= amt;
     this.capDifficulty();
   }
 

src/Server/ServerHelpers.ts

@@ -2,7 +2,7 @@ import { GetServer, createUniqueRandomIp, ipExists } from "./AllServers";
 import { Server, IConstructorParams } from "./Server";
 import { BaseServer } from "./BaseServer";
 import { calculateServerGrowth, calculateServerGrowthLog } from "./formulas/grow";
-
+import { currentNodeMults } from "../BitNode/BitNodeMultipliers";
 import { ServerConstants } from "./data/Constants";
 import { Player } from "@player";
 import { CompletedProgramName, LiteratureName } from "@enums";
@@ -258,3 +258,8 @@ export function getCoreBonus(cores = 1): number {
   const coreBonus = 1 + (cores - 1) / 16;
   return coreBonus;
 }
+
+export function getWeakenEffect(threads: number, cores: number): number {
+  const coreBonus = getCoreBonus(cores);
+  return ServerConstants.ServerWeakenAmount * threads * coreBonus * currentNodeMults.ServerWeakenRate;
+}

src/Terminal/Terminal.ts

@@ -17,7 +17,7 @@ import { GetServer } from "../Server/AllServers";
 
 import { checkIfConnectedToDarkweb } from "../DarkWeb/DarkWeb";
 import { iTutorialNextStep, iTutorialSteps, ITutorial } from "../InteractiveTutorial";
-import { processSingleServerGrowth } from "../Server/ServerHelpers";
+import { processSingleServerGrowth, getWeakenEffect } from "../Server/ServerHelpers";
 import { parseCommand, parseCommands } from "./Parser";
 import { SpecialServers } from "../Server/data/SpecialServers";
 import { Settings } from "../Settings/Settings";
@@ -280,14 +280,16 @@ export class Terminal {
     if (!(server instanceof Server)) throw new Error("server should be normal server");
     const expGain = calculateHackingExpGain(server, Player);
     const oldSec = server.hackDifficulty;
-    server.weaken(ServerConstants.ServerWeakenAmount);
+    const weakenAmt = getWeakenEffect(1, server.cpuCores);
+    server.weaken(weakenAmt);
     const newSec = server.hackDifficulty;
 
     Player.gainHackingExp(expGain);
     this.print(
-      `Security decreased on '${server.hostname}' from ${formatSecurity(oldSec)} to ${formatSecurity(
-        newSec,
-      )} (min: ${formatSecurity(server.minDifficulty)})` + ` and Gained ${formatExp(expGain)} hacking exp.`,
+      `Security decreased on '${server.hostname}' by ${formatSecurity(weakenAmt)} from ${formatSecurity(
+        oldSec,
+      )} to ${formatSecurity(newSec)} (min: ${formatSecurity(server.minDifficulty)})` +
+        ` and Gained ${formatExp(expGain)} hacking exp.`,
     );
   }