Mirror: Fix borg charger error (#252)

## Mirror of PR #26230: [Fix borg charger
error](space-wizards/space-station-14#26230)
from <img src="https://avatars.githubusercontent.com/u/10567778?v=4"
alt="space-wizards" width="22"/>
[space-wizards](https://github.com/space-wizards)/[space-station-14](https://github.com/space-wizards/space-station-14)

###### `29887636e5614f4f91b968107875722293f0c8b4`

PR opened by <img
src="https://avatars.githubusercontent.com/u/85356?v=4" width="16"/><a
href="https://github.com/Tayrtahn"> Tayrtahn</a> at 2024-03-18 12:52:09
UTC

---

PR changed 1 files with 7 additions and 7 deletions.

The PR had the following labels:


---

<details open="true"><summary><h1>Original Body</h1></summary>

> <!-- Please read these guidelines before opening your PR:
https://docs.spacestation14.io/en/getting-started/pr-guideline -->
> <!-- The text between the arrows are comments - they will not be
visible on your PR. -->
> 
> ## About the PR
> <!-- What did you change in this PR? -->
> Borg chargers can now charge borgs again.
> 
> ## Why / Balance
> <!-- Why was it changed? Link any discussions or issues here. Please
discuss how this would affect game balance. -->
> Bug fix.
> 
> ## Technical details
> <!-- If this is a code change, summarize at high level how your new
code works. This makes it easier to review. -->
> An oversight in #25871 caused ChargerSystem to call BatterySystem's
SetCharge with the wrong EntityUid.
> 
> SearchForBattery has been given another out argument which gives the
found battery's uid so it can be passed to SetCharge.
> 
> To the author of #25871: get better at testing your code!
> 
> ## Media
> <!-- 
> PRs which make ingame changes (adding clothing, items, new features,
etc) are required to have media attached that showcase the changes.
> Small fixes/refactors are exempt.
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given.
> 
> If you're unsure whether your PR will require media, ask a maintainer.
> 
> Check the box below to confirm that you have in fact seen this (put an
X in the brackets, like [X]):
> -->
> 
> - [X] I have added screenshots/videos to this PR showcasing its
changes ingame, **or** this PR does not require an ingame showcase
> 
> ## Breaking changes
> <!--
> List any breaking changes, including namespace, public
class/method/field changes, prototype renames; and provide instructions
for fixing them. This will be pasted in #codebase-changes.
> -->
> 
> **Changelog**
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> <!--
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> 🆑
> - add: Added fun!
> - remove: Removed fun!
> - tweak: Changed fun!
> - fix: Fixed fun!
> -->
> 🆑
> - fix: Cyborg recharging stations are able to charge cyborgs again.


</details>

Co-authored-by: SimpleStation14 <Unknown>

Content.Server/Power/EntitySystems/ChargerSystem.cs

@@ -6,7 +6,6 @@
 using JetBrains.Annotations;
 using Robust.Shared.Containers;
 using System.Diagnostics.CodeAnalysis;
-using System.Linq;
 using Content.Shared.Storage.Components;
 using Robust.Server.Containers;
 
@@ -179,7 +178,7 @@ private CellChargerStatus GetStatus(EntityUid uid, ChargerComponent component)
         if (container.ContainedEntities.Count == 0)
             return CellChargerStatus.Empty;
 
-        if (!SearchForBattery(container.ContainedEntities.First(), out var heldBattery))
+        if (!SearchForBattery(container.ContainedEntities[0], out _, out var heldBattery))
             return CellChargerStatus.Off;
 
         if (Math.Abs(heldBattery.MaxCharge - heldBattery.CurrentCharge) < 0.01)
@@ -199,27 +198,28 @@ private void TransferPower(EntityUid uid, EntityUid targetEntity, ChargerCompone
         if (component.Whitelist?.IsValid(targetEntity, EntityManager) == false)
             return;
 
-        if (!SearchForBattery(targetEntity, out var heldBattery))
+        if (!SearchForBattery(targetEntity, out var batteryUid, out var heldBattery))
             return;
 
-        _battery.SetCharge(targetEntity, heldBattery.CurrentCharge + component.ChargeRate * frameTime, heldBattery);
+        _battery.SetCharge(batteryUid.Value, heldBattery.CurrentCharge + component.ChargeRate * frameTime, heldBattery);
         // Just so the sprite won't be set to 99.99999% visibility
         if (heldBattery.MaxCharge - heldBattery.CurrentCharge < 0.01)
         {
-            _battery.SetCharge(targetEntity, heldBattery.MaxCharge, heldBattery);
+            _battery.SetCharge(batteryUid.Value, heldBattery.MaxCharge, heldBattery);
         }
 
         UpdateStatus(uid, component);
     }
 
-    private bool SearchForBattery(EntityUid uid, [NotNullWhen(true)] out BatteryComponent? component)
+    private bool SearchForBattery(EntityUid uid, [NotNullWhen(true)] out EntityUid? batteryUid, [NotNullWhen(true)] out BatteryComponent? component)
     {
         // try get a battery directly on the inserted entity
         if (!TryComp(uid, out component))
         {
             // or by checking for a power cell slot on the inserted entity
-            return _powerCell.TryGetBatteryFromSlot(uid, out component);
+            return _powerCell.TryGetBatteryFromSlot(uid, out batteryUid, out component);
         }
+        batteryUid = uid;
         return true;
     }
 }