Make holofans use power cells (#8813)

Content.Server/Holosign/HolosignProjectorComponent.cs

@@ -6,28 +6,14 @@ namespace Content.Server.Holosign
     [RegisterComponent]
     public sealed class HolosignProjectorComponent : Component
     {
-        [ViewVariables]
-        [DataField("maxCharges")]
-        public int MaxCharges = 6;
-
-        [ViewVariables(VVAccess.ReadWrite), DataField("charges")]
-        public int CurrentCharges = 6;
-
         [ViewVariables(VVAccess.ReadWrite)]
         [DataField("signProto", customTypeSerializer:typeof(PrototypeIdSerializer<EntityPrototype>))]
         public string SignProto = "HolosignWetFloor";
 
         /// <summary>
-        /// When the holosign was last used.
+        /// How much charge a single use expends.
         /// </summary>
-        [ViewVariables(VVAccess.ReadWrite), DataField("lastUse")]
-        public TimeSpan LastUsed = TimeSpan.Zero;
-
-        /// <summary>
-        /// How long it takes for 1 charge to accumulate.
-        /// </summary>
-        [ViewVariables(VVAccess.ReadWrite)]
-        [DataField("rechargeTime")]
-        public TimeSpan RechargeTime = TimeSpan.FromSeconds(30);
+        [ViewVariables(VVAccess.ReadWrite), DataField("chargeUse")]
+        public float ChargeUse = 50f;
     }
 }

Content.Server/Holosign/HolosignSystem.cs

@@ -1,13 +1,16 @@
 using Content.Shared.Interaction.Events;
 using Content.Shared.Examine;
 using Content.Server.Coordinates.Helpers;
+using Content.Server.Power.Components;
+using Content.Server.PowerCell;
+using Content.Shared.PowerCell.Components;
 using Robust.Shared.Timing;
 
 namespace Content.Server.Holosign
 {
     public sealed class HolosignSystem : EntitySystem
     {
-        [Dependency] private readonly IGameTiming _timing = default!;
+        [Dependency] private readonly PowerCellSystem _cellSystem = default!;
 
         public override void Initialize()
         {
@@ -16,42 +19,51 @@ namespace Content.Server.Holosign
             SubscribeLocalEvent<HolosignProjectorComponent, ExaminedEvent>(OnExamine);
         }
 
-        private int GetCharges(HolosignProjectorComponent component)
-        {
-            return component.CurrentCharges + (int) ((_timing.CurTime - component.LastUsed).TotalSeconds / component.RechargeTime.TotalSeconds);
-        }
-
         private void OnExamine(EntityUid uid, HolosignProjectorComponent component, ExaminedEvent args)
         {
             // TODO: This should probably be using an itemstatus
             // TODO: I'm too lazy to do this rn but it's literally copy-paste from emag.
-            var timeRemaining = (component.LastUsed + component.RechargeTime * (component.MaxCharges - component.CurrentCharges) - _timing.CurTime).TotalSeconds % component.RechargeTime.TotalSeconds;
-            var charges = GetCharges(component);
+            _cellSystem.TryGetBatteryFromSlot(uid, out var battery);
+            var charges = UsesRemaining(component, battery);
+            var maxCharges = MaxUses(component, battery);
 
             args.PushMarkup(Loc.GetString("emag-charges-remaining", ("charges", charges)));
-            if (charges == component.MaxCharges)
+
+            if (charges > 0 && charges == maxCharges)
             {
                 args.PushMarkup(Loc.GetString("emag-max-charges"));
                 return;
             }
-            args.PushMarkup(Loc.GetString("emag-recharging", ("seconds", Math.Round(timeRemaining))));
         }
 
         private void OnUse(EntityUid uid, HolosignProjectorComponent component, UseInHandEvent args)
         {
-            if (component.CurrentCharges == 0 || args.Handled)
+            if (args.Handled ||
+                !_cellSystem.TryGetBatteryFromSlot(uid, out var battery) ||
+                !battery.TryUseCharge(component.ChargeUse))
                 return;
 
             // TODO: Too tired to deal
             var holo = EntityManager.SpawnEntity(component.SignProto, Transform(args.User).Coordinates.SnapToGrid(EntityManager));
             Transform(holo).Anchored = true;
 
-            // Don't reset last use time if it's already accumulating.
-            if (component.CurrentCharges == component.MaxCharges)
-                component.LastUsed = _timing.CurTime;
-
-            component.CurrentCharges--;
             args.Handled = true;
         }
+
+        private int UsesRemaining(HolosignProjectorComponent component, BatteryComponent? battery = null)
+        {
+            if (battery == null ||
+                component.ChargeUse == 0f) return 0;
+
+            return (int) (battery.CurrentCharge / component.ChargeUse);
+        }
+
+        private int MaxUses(HolosignProjectorComponent component, BatteryComponent? battery = null)
+        {
+            if (battery == null ||
+                component.ChargeUse == 0f) return 0;
+
+            return (int) (battery.MaxCharge / component.ChargeUse);
+        }
     }
 }

Resources/Prototypes/Entities/Objects/Devices/holoprojectors.yml

@@ -5,9 +5,16 @@
   description: A handy-dandy holographic projector that displays a janitorial sign.
   components:
   - type: HolosignProjector
+  - type: ItemCooldown
+  - type: UseDelay
+    delay: 1.0
+  - type: PowerCellSlot
+    cellSlot:
+      startingItem: PowerCellSmallHigh
   - type: Sprite
     sprite: Objects/Devices/Holoprojectors/custodial.rsi
     state: icon
+    netsync: false
 
 - type: entity
   parent: Holoprojector
@@ -17,7 +24,8 @@
   components:
   - type: HolosignProjector
     signProto: HoloFan
-    rechargeTime: 120
+    chargeUse: 120
   - type: Sprite
     sprite: Objects/Devices/Holoprojectors/atmos.rsi
     state: icon
+    netsync: false