Literally Murder IExamine (#7352)

Content.Server/Power/EntitySystems/ApcSystem.cs

@@ -1,7 +1,5 @@
-using System;
 using Content.Server.Popups;
 using Content.Server.Power.Components;
-using Content.Server.Power.Pow3r;
 using Content.Shared.Access.Components;
 using Content.Shared.Access.Systems;
 using Content.Shared.APC;
@@ -9,10 +7,6 @@ using Content.Shared.Emag.Systems;
 using JetBrains.Annotations;
 using Robust.Server.GameObjects;
 using Robust.Shared.Audio;
-using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
-using Robust.Shared.Localization;
-using Robust.Shared.Maths;
 using Robust.Shared.Player;
 using Robust.Shared.Timing;
 
@@ -48,7 +42,6 @@ namespace Content.Server.Power.EntitySystems
         {
             UpdateApcState(uid, component);
         }
-
         private void OnToggleMainBreaker(EntityUid uid, ApcComponent component, ApcToggleMainBreakerMessage args)
         {
             TryComp<AccessReaderComponent>(uid, out var access);

Content.Server/Power/EntitySystems/BatterySystem.cs

@@ -1,6 +1,6 @@
 using Content.Server.Power.Components;
+using Content.Shared.Examine;
 using JetBrains.Annotations;
-using Robust.Shared.GameObjects;
 
 namespace Content.Server.Power.EntitySystems
 {
@@ -11,10 +11,33 @@ namespace Content.Server.Power.EntitySystems
         {
             base.Initialize();
 
+            SubscribeLocalEvent<ExaminableBatteryComponent, ExaminedEvent>(OnExamine);
+
             SubscribeLocalEvent<NetworkBatteryPreSync>(PreSync);
             SubscribeLocalEvent<NetworkBatteryPostSync>(PostSync);
         }
 
+        private void OnExamine(EntityUid uid, ExaminableBatteryComponent component, ExaminedEvent args)
+        {
+            if (!TryComp<BatteryComponent>(uid, out var batteryComponent))
+                return;
+            if (args.IsInDetailsRange)
+            {
+                var effectiveMax = batteryComponent.MaxCharge;
+                if (effectiveMax == 0)
+                    effectiveMax = 1;
+                var chargeFraction = batteryComponent.CurrentCharge / effectiveMax;
+                var chargePercentRounded = (int) (chargeFraction * 100);
+                args.PushMarkup(
+                    Loc.GetString(
+                        "examinable-battery-component-examine-detail",
+                        ("percent", chargePercentRounded),
+                        ("markupPercentColor", "green")
+                    )
+                );
+            }
+        }
+
         private void PreSync(NetworkBatteryPreSync ev)
         {
             foreach (var (netBat, bat) in EntityManager.EntityQuery<PowerNetworkBatteryComponent, BatteryComponent>())

Content.Server/Power/EntitySystems/PowerReceiverSystem.cs

@@ -1,6 +1,5 @@
 using Content.Server.Power.Components;
-using Robust.Shared.GameObjects;
-
+using Content.Shared.Examine;
 namespace Content.Server.Power.EntitySystems
 {
     public sealed class PowerReceiverSystem : EntitySystem
@@ -8,6 +7,7 @@ namespace Content.Server.Power.EntitySystems
         public override void Initialize()
         {
             base.Initialize();
+            SubscribeLocalEvent<ApcPowerReceiverComponent, ExaminedEvent>(OnExamined);
 
             SubscribeLocalEvent<ApcPowerReceiverComponent, ExtensionCableSystem.ProviderConnectedEvent>(OnProviderConnected);
             SubscribeLocalEvent<ApcPowerReceiverComponent, ExtensionCableSystem.ProviderDisconnectedEvent>(OnProviderDisconnected);
@@ -17,6 +17,16 @@ namespace Content.Server.Power.EntitySystems
             SubscribeLocalEvent<ApcPowerProviderComponent, ExtensionCableSystem.ReceiverDisconnectedEvent>(OnReceiverDisconnected);
         }
 
+        ///<summary>
+        ///Adds some markup to the examine text of whatever object is using this component to tell you if it's powered or not, even if it doesn't have an icon state to do this for you.
+        ///</summary>
+        private void OnExamined(EntityUid uid, ApcPowerReceiverComponent component, ExaminedEvent args)
+        {
+            args.PushMarkup(Loc.GetString("power-receiver-component-on-examine-main",
+                                            ("stateText", Loc.GetString( component.Powered ? "power-receiver-component-on-examine-powered" :
+                                                                                   "power-receiver-component-on-examine-unpowered"))));
+        }
+
         private void OnProviderShutdown(EntityUid uid, ApcPowerProviderComponent component, ComponentShutdown args)
         {
             foreach (var receiver in component.LinkedReceivers)