Some work on the mess that is this power code.

Jesus.

Tons of fixes, refactors and other things.
The powernet's code is still awful though.

Content.Client/Content.Client.csproj

@@ -75,6 +75,7 @@
     <Compile Include="GameObjects\Components\Items\ClientHandsComponent.cs" />
     <Compile Include="Interfaces\GameObjects\Components\Items\IHandsComponent.cs" />
     <Compile Include="UserInterface\HandsGui.cs" />
+    <Compile Include="GameObjects\Components\Power\PowerDebugTool.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Content.Shared\Content.Shared.csproj">

Content.Client/EntryPoint.cs

@@ -1,4 +1,5 @@
 using Content.Client.GameObjects;
+using Content.Client.GameObjects.Components.Power;
 using Content.Client.GameObjects.Components.Storage;
 using Content.Client.Interfaces.GameObjects;
 using SS14.Shared.ContentPack;
@@ -43,6 +44,7 @@ namespace Content.Client
             factory.RegisterReference<HandsComponent, IHandsComponent>();
             factory.Register<ClientStorageComponent>();
             factory.Register<ClientInventoryComponent>();
+            factory.Register<PowerDebugTool>();
         }
     }
 }

Content.Client/GameObjects/Components/Power/PowerDebugTool.cs

@@ -0,0 +1,28 @@
+using Content.Shared.GameObjects;
+using Content.Shared.GameObjects.Components.Power;
+using SS14.Client.UserInterface.Controls;
+using SS14.Client.UserInterface.CustomControls;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Interfaces.Network;
+
+namespace Content.Client.GameObjects.Components.Power
+{
+    public class PowerDebugTool : SharedPowerDebugTool
+    {
+        public override void HandleMessage(ComponentMessage message, INetChannel netChannel = null, IComponent component = null)
+        {
+            base.HandleMessage(message, netChannel, component);
+
+            switch (message)
+            {
+                case OpenDataWindowMsg msg:
+                    var window = new SS14Window();
+                    window.Contents.AddChild(new Label() { Text = msg.Data });
+                    window.AddToScreen();
+                    window.Open();
+                    break;
+            }
+        }
+    }
+}

Content.Server/Content.Server.csproj

@@ -107,6 +107,8 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Interfaces\GameObjects\Components\Temperature\ITemperatureComponent.cs" />
     <Compile Include="Interfaces\GameObjects\Components\Damage\IDamageableComponent.cs" />
+    <Compile Include="GameObjects\Components\Power\PoweredLightComponent.cs" />
+    <Compile Include="GameObjects\Components\Power\PowerDebugTool.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Content.Shared\Content.Shared.csproj">
@@ -139,5 +141,4 @@
     <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
-  <ItemGroup />
 </Project>

Content.Server/EntryPoint.cs

@@ -68,6 +68,7 @@ namespace Content.Server
             //Power Components
             factory.Register<PowerTransferComponent>();
             factory.Register<PowerProviderComponent>();
+            factory.RegisterReference<PowerProviderComponent, PowerDeviceComponent>();
             factory.Register<PowerNodeComponent>();
             factory.Register<PowerStorageComponent>();
             factory.Register<PowerDeviceComponent>();
@@ -87,6 +88,9 @@ namespace Content.Server
             factory.Register<MeleeWeaponComponent>();
 
             factory.Register<ServerStorageComponent>();
+
+            factory.Register<PowerDebugTool>();
+            factory.Register<PoweredLightComponent>();
         }
 
         /// <inheritdoc />

Content.Server/GameObjects/Components/Power/PowerDebugTool.cs

@@ -0,0 +1,80 @@
+using System.Text;
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.GameObjects.Components.Power;
+using SS14.Server.Interfaces.GameObjects;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Map;
+
+namespace Content.Server.GameObjects.Components.Power
+{
+    public class PowerDebugTool : SharedPowerDebugTool, IAfterAttack
+    {
+        void IAfterAttack.Afterattack(IEntity user, LocalCoordinates clicklocation, IEntity attacked)
+        {
+            if (attacked == null)
+            {
+                return;
+            }
+
+            var builder = new StringBuilder();
+
+            if (attacked.TryGetComponent<PowerNodeComponent>(out var node))
+            {
+                builder.AppendFormat("Power Node:\n");
+                if (node.Parent == null)
+                {
+                    builder.Append("  No Powernet!\n");
+                }
+                else
+                {
+                    builder.AppendFormat("  Powernet: {0}\n", node.Parent.Uid);
+                }
+            }
+
+            if (attacked.TryGetComponent<PowerDeviceComponent>(out var device))
+            {
+                builder.AppendFormat(@"Power Device:
+  Load: {0} W
+  Priority: {1}
+  Drawtype: {2}, Connected: {3}
+  Powered: {4}
+", device.Load, device.Priority, device.DrawType, device.Connected, device.Powered);
+
+                if (device.Connected == DrawTypes.Provider || device.Connected == DrawTypes.Both)
+                {
+                    builder.Append("    Providers:\n");
+                    foreach (var provider in device.AvailableProviders)
+                    {
+                        var providerTransform = provider.Owner.GetComponent<IServerTransformComponent>();
+                        builder.AppendFormat("      {0} @ {1}", provider.Name, providerTransform.LocalPosition);
+                        if (device.Provider == provider)
+                        {
+                            builder.Append(" (CURRENT)");
+                        }
+                        builder.Append('\n');
+                    }
+                }
+            }
+
+            if (attacked.TryGetComponent<PowerStorageComponent>(out var storage))
+            {
+                builder.AppendFormat(@"Power Storage:
+  Capacity: {0}, Charge: {1}, ChargeRate: {2}, DistributionRate: {3}, ChargePowernet: {4}
+", storage.Capacity, storage.Charge, storage.ChargeRate, storage.DistributionRate, storage.ChargePowernet);
+            }
+
+            OpenDataWindowClientSide(user, builder.ToString());
+        }
+
+        private void OpenDataWindowClientSide(IEntity user, string data)
+        {
+            if (!user.TryGetComponent<IActorComponent>(out var actor))
+            {
+                return;
+            }
+
+            SendNetworkMessage(new OpenDataWindowMsg(data), actor.playerSession.ConnectedClient);
+        }
+    }
+}

Content.Server/GameObjects/Components/Power/PowerDevice.cs

@@ -4,6 +4,7 @@ using SS14.Shared.GameObjects;
 using SS14.Shared.Interfaces.GameObjects;
 using SS14.Shared.IoC;
 using SS14.Shared.Utility;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using YamlDotNet.RepresentationModel;
@@ -20,22 +21,43 @@ namespace Content.Server.GameObjects.Components.Power
         /// <summary>
         ///     The method of draw we will try to use to place our load set via component parameter, defaults to using power providers
         /// </summary>
-        public virtual DrawTypes Drawtype { get; protected set; } = DrawTypes.Provider;
+        public virtual DrawTypes DrawType { get; protected set; } = DrawTypes.Provider;
 
         /// <summary>
         ///     The power draw method we are currently connected to and using
         /// </summary>
         public DrawTypes Connected { get; protected set; } = DrawTypes.None;
 
-        public bool _powered = false;
+        public bool Powered { get; private set; } = false;
+
+
         /// <summary>
-        /// Status indicator variable for powered
+        ///     Is an external power source currently available?
         /// </summary>
-        public virtual bool Powered
+        public bool ExternalPowered
         {
-            get => _powered;
+            get => _externalPowered;
-            set => SetPowered(value);
+            set
+            {
+                _externalPowered = value;
+                UpdatePowered();
             }
+        }
+        private bool _externalPowered = false;
+
+        /// <summary>
+        ///     Is an internal power source currently available?
+        /// </summary>
+        public bool InternalPowered
+        {
+            get => _internalPowered;
+            set
+            {
+                _internalPowered = value;
+                UpdatePowered();
+            }
+        }
+        private bool _internalPowered = false;
 
         /// <summary>
         /// Priority for powernet draw, lower will draw first, defined in powernet.cs
@@ -50,7 +72,7 @@ namespace Content.Server.GameObjects.Components.Power
         public float Load
         {
             get => _load;
-            set { UpdateLoad(value); }
+            set => UpdateLoad(value);
         }
 
         /// <summary>
@@ -60,20 +82,22 @@ namespace Content.Server.GameObjects.Components.Power
 
 
         private PowerProviderComponent _provider;
+
         /// <summary>
         /// A power provider that will handle our load, if we are linked to any
         /// </summary>
         public PowerProviderComponent Provider
         {
             get => _provider;
-            set {
+            set
+            {
                 Connected = DrawTypes.Provider;
                 if (_provider != null)
                 {
                     _provider.RemoveDevice(this);
                 }
 
-                if(value != null)
+                if (value != null)
                 {
                     _provider = value;
                     _provider.AddDevice(this);
@@ -85,11 +109,13 @@ namespace Content.Server.GameObjects.Components.Power
             }
         }
 
+        public event EventHandler<PowerStateEventArgs> OnPowerStateChanged;
+
         public override void OnAdd()
         {
             base.OnAdd();
 
-            if (Drawtype == DrawTypes.Both || Drawtype == DrawTypes.Node)
+            if (DrawType == DrawTypes.Node || DrawType == DrawTypes.Both)
             {
                 if (!Owner.TryGetComponent(out PowerNodeComponent node))
                 {
@@ -106,7 +132,7 @@ namespace Content.Server.GameObjects.Components.Power
         {
             if (Owner.TryGetComponent(out PowerNodeComponent node))
             {
-                if(node.Parent != null)
+                if (node.Parent != null)
                 {
                     node.Parent.RemoveDevice(this);
                 }
@@ -123,7 +149,7 @@ namespace Content.Server.GameObjects.Components.Power
         {
             if (mapping.TryGetNode("Drawtype", out YamlNode node))
             {
-                Drawtype = node.AsEnum<DrawTypes>();
+                DrawType = node.AsEnum<DrawTypes>();
             }
             if (mapping.TryGetNode("Load", out node))
             {
@@ -137,7 +163,7 @@ namespace Content.Server.GameObjects.Components.Power
 
         string IExamine.Examine()
         {
-            if(!Powered)
+            if (!Powered)
             {
                 return "The device is not powered";
             }
@@ -148,44 +174,32 @@ namespace Content.Server.GameObjects.Components.Power
         {
             var oldLoad = _load;
             _load = value;
-            if(Connected == DrawTypes.Node)
+            if (Connected == DrawTypes.Node)
             {
                 var node = Owner.GetComponent<PowerNodeComponent>();
                 node.Parent.UpdateDevice(this, oldLoad);
             }
-            else if(Connected == DrawTypes.Provider)
+            else if (Connected == DrawTypes.Provider)
             {
                 Provider.UpdateDevice(this, oldLoad);
             }
         }
 
-        /// <summary>
+        private void UpdatePowered()
-        /// Changes behavior when receiving a command to become powered or depowered
-        /// </summary>
-        /// <param name="value"></param>
-        public virtual void SetPowered(bool value)
         {
-            //Let them set us to true
+            var oldPowered = Powered;
-            if (value == true)
+            Powered = ExternalPowered || InternalPowered;
+            if (oldPowered != Powered)
             {
-                _powered = true;
+                if (Powered)
-                return;
+                {
+                    OnPowerStateChanged?.Invoke(this, new PowerStateEventArgs(true));
                 }
-
+                else
-            //A powernet has decided we will not be powered this tick, lets try to power ourselves
-            if (value == false && Owner.TryGetComponent(out PowerStorageComponent storage))
                 {
-                if (storage.CanDeductCharge(Load))
+                    OnPowerStateChanged?.Invoke(this, new PowerStateEventArgs(false));
-                {
-                    storage.DeductCharge(Load);
-                    _powered = true;
-                    return;
                 }
             }
-
-            //For some reason above we could not power ourselves, we depower
-            _powered = false;
-            return;
         }
 
         /// <summary>
@@ -196,7 +210,7 @@ namespace Content.Server.GameObjects.Components.Power
         {
             AvailableProviders.Add(provider);
 
-            if(Connected != DrawTypes.Node)
+            if (Connected != DrawTypes.Node)
             {
                 ConnectToBestProvider();
             }
@@ -234,7 +248,7 @@ namespace Content.Server.GameObjects.Components.Power
                 }
             }
 
-            if(Provider != bestprovider)
+            if (Provider != bestprovider)
                 Provider = bestprovider;
         }
 
@@ -249,6 +263,12 @@ namespace Content.Server.GameObjects.Components.Power
 
             AvailableProviders.Remove(provider);
 
+            if (provider == Provider)
+            {
+                Provider = null;
+                ExternalPowered = false;
+            }
+
             if (Connected != DrawTypes.Node)
             {
                 ConnectToBestProvider();
@@ -260,7 +280,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="eventarg"></param>
-        private void PowernetConnect(object sender, PowernetEventArgs eventarg)
+        protected virtual void PowernetConnect(object sender, PowernetEventArgs eventarg)
         {
             //This sets connected = none so it must be first
             Provider = null;
@@ -274,7 +294,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="eventarg"></param>
-        private void PowernetRegenerate(object sender, PowernetEventArgs eventarg)
+        protected virtual void PowernetRegenerate(object sender, PowernetEventArgs eventarg)
         {
             eventarg.Powernet.AddDevice(this);
         }
@@ -284,13 +304,31 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="eventarg"></param>
-        private void PowernetDisconnect(object sender, PowernetEventArgs eventarg)
+        protected virtual void PowernetDisconnect(object sender, PowernetEventArgs eventarg)
         {
             eventarg.Powernet.RemoveDevice(this);
             Connected = DrawTypes.None;
 
             ConnectToBestProvider();
         }
+
+        internal virtual void ProcessInternalPower(float frametime)
+        {
+            if (Owner.TryGetComponent<PowerStorageComponent>(out var storage) && storage.CanDeductCharge(Load))
+            {
+                // We still keep InternalPowered correct if connected externally,
+                // but don't use it.
+                if (!ExternalPowered)
+                {
+                    storage.DeductCharge(Load);
+                }
+                InternalPowered = true;
+            }
+            else
+            {
+                InternalPowered = false;
+            }
+        }
     }
 
     public enum DrawTypes
@@ -298,6 +336,16 @@ namespace Content.Server.GameObjects.Components.Power
         None = 0,
         Node = 1,
         Provider = 2,
-        Both = 3
+        Both = 3,
+    }
+
+    public class PowerStateEventArgs : EventArgs
+    {
+        public readonly bool Powered;
+
+        public PowerStateEventArgs(bool powered)
+        {
+            Powered = powered;
+        }
     }
 }

Content.Server/GameObjects/Components/Power/PowerNodeComponent.cs

@@ -57,7 +57,7 @@ namespace Content.Server.GameObjects.Components.Power
                         .Where(x => x.HasComponent<PowerTransferComponent>())
                         .OrderByDescending(x => (x.GetComponent<TransformComponent>().WorldPosition - position).Length);
             var choose = wires.FirstOrDefault();
-            if(choose != null)
+            if (choose != null)
                 ConnectToPowernet(choose.GetComponent<PowerTransferComponent>().Parent);
         }
 
@@ -68,7 +68,7 @@ namespace Content.Server.GameObjects.Components.Power
         public void ConnectToPowernet(Powernet toconnect)
         {
             Parent = toconnect;
-            Parent.Nodelist.Add(this);
+            Parent.NodeList.Add(this);
             OnPowernetConnect?.Invoke(this, new PowernetEventArgs(Parent));
         }
 
@@ -79,10 +79,10 @@ namespace Content.Server.GameObjects.Components.Power
         public void RegeneratePowernet(Powernet toconnect)
         {
             //This removes the device from things that will be powernet disconnected when dirty powernet is killed
-            Parent.Nodelist.Remove(this);
+            Parent.NodeList.Remove(this);
 
             Parent = toconnect;
-            Parent.Nodelist.Add(this);
+            Parent.NodeList.Add(this);
             OnPowernetRegenerate?.Invoke(this, new PowernetEventArgs(Parent));
         }
 
@@ -91,7 +91,11 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void DisconnectFromPowernet()
         {
-            Parent.Nodelist.Remove(this);
+            if (Parent == null)
+            {
+                return;
+            }
+            Parent.NodeList.Remove(this);
             OnPowernetDisconnect?.Invoke(this, new PowernetEventArgs(Parent));
             Parent = null;
         }

Content.Server/GameObjects/Components/Power/PowerProviderComponent.cs

@@ -19,7 +19,7 @@ namespace Content.Server.GameObjects.Components.Power
         public override string Name => "PowerProvider";
 
         /// <inheritdoc />
-        public override DrawTypes Drawtype { get; protected set; } = DrawTypes.Node;
+        public override DrawTypes DrawType { get; protected set; } = DrawTypes.Node;
 
         /// <summary>
         /// Variable that determines the range that the power provider will try to supply power to
@@ -29,12 +29,22 @@ namespace Content.Server.GameObjects.Components.Power
         /// <summary>
         /// List storing all the power devices that we are currently providing power to
         /// </summary>
-        public SortedSet<PowerDeviceComponent> Deviceloadlist = new SortedSet<PowerDeviceComponent>(new Powernet.DevicePriorityCompare());
+        public SortedSet<PowerDeviceComponent> DeviceLoadList = new SortedSet<PowerDeviceComponent>(new Powernet.DevicePriorityCompare());
 
         public List<PowerDeviceComponent> DepoweredDevices = new List<PowerDeviceComponent>();
 
         public override Powernet.Priority Priority { get; protected set; } = Powernet.Priority.Provider;
 
+        public override void OnRemove()
+        {
+            base.OnRemove();
+
+            foreach (var device in DeviceLoadList)
+            {
+                device.RemoveProvider(this);
+            }
+        }
+
         public override void LoadParameters(YamlMappingNode mapping)
         {
             if (mapping.TryGetNode("Range", out YamlNode node))
@@ -47,78 +57,71 @@ namespace Content.Server.GameObjects.Components.Power
             }
         }
 
-        /// <inheritdoc />
+        internal override void ProcessInternalPower(float frametime)
-        public override void SetPowered(bool value)
         {
-            //Let them set us true, we must now power all the devices that rely on us for energy
+            // Right now let's just assume that APCs don't have a power demand themselves and as such they're always marked as powered.
-            if (value == true)
+            InternalPowered = true;
+            if (!Owner.TryGetComponent<PowerStorageComponent>(out var storage))
+            {
+                return;
+            }
+
+            if (ExternalPowered)
             {
                 PowerAllDevices();
                 return;
             }
 
-            //A powernet has decided we will not be powered this tick, lets try to power ourselves
-            if (value == false && Owner.TryGetComponent(out PowerStorageComponent storage))
-            {
-                //Can the storage cover powering all our devices and us? If so power all
             if (storage.CanDeductCharge(Load))
             {
+                PowerAllDevices();
                 storage.DeductCharge(Load);
-                    _powered = true;
                 return;
             }
-                //Does the storage even have any power to give us? If so power as much as we can
+
-                else if (storage.RequestAllCharge() != 0)
+            var remainingLoad = storage.AvailableCharge();
+            var usedLoad = 0f;
+            foreach (var device in DeviceLoadList)
             {
-                    var depowervalue = storage.RequestAllCharge() - Load;
+                if (device.Load > remainingLoad)
-                    _powered = true;
-                    //See code in powernet for same functionality
-                    foreach (var device in Deviceloadlist)
                 {
-                        device.Powered = false;
+                    device.ExternalPowered = false;
                     DepoweredDevices.Add(device);
-                        depowervalue -= device.Load;
-                        if (depowervalue < 0)
-                            break;
                 }
-                    return;
+                else
-                }
-                //Storage doesn't have anything, depower everything
-                else if (storage.RequestAllCharge() == 0)
                 {
-                    DepowerAllDevices();
+                    if (!device.ExternalPowered)
-                    return;
+                    {
+                        device.ExternalPowered = true;
+                        DepoweredDevices.Remove(device);
+                    }
+                    usedLoad += device.Load;
+                    remainingLoad -= device.Load;
                 }
             }
 
-            //For some reason above we could not power ourselves, we depower ourselves and all devices
+            storage.DeductCharge(usedLoad);
-            DepowerAllDevices();
-            return;
         }
-
         private void PowerAllDevices()
         {
-            _powered = true;
             foreach (var device in DepoweredDevices)
             {
-                device.Powered = true;
+                device.ExternalPowered = true;
             }
             DepoweredDevices.Clear();
         }
 
         private void DepowerAllDevices()
         {
-            _powered = false;
+            foreach (var device in DeviceLoadList)
-            foreach (var device in DepoweredDevices)
             {
-                device.Powered = false;
+                device.ExternalPowered = false;
             }
         }
 
-        private void PowernetConnect(object sender, PowernetEventArgs eventarg)
+        protected override void PowernetConnect(object sender, PowernetEventArgs eventarg)
         {
-            eventarg.Powernet.AddDevice(this);
+            base.PowernetConnect(sender, eventarg);
-            Connected = DrawTypes.Node;
 
             //Find devices within range to take under our control
             var _emanager = IoCManager.Resolve<IServerEntityManager>();
@@ -132,25 +135,20 @@ namespace Content.Server.GameObjects.Components.Power
                 var device = entity.GetComponent<PowerDeviceComponent>();
 
                 //Make sure the device can accept power providers to give it power
-                if (device.Drawtype == DrawTypes.Provider || device.Drawtype == DrawTypes.Both)
+                if (device.DrawType == DrawTypes.Provider || device.DrawType == DrawTypes.Both)
                 {
                     device.AddProvider(this);
                 }
             }
         }
 
-        private void PowernetRegenerate(object sender, PowernetEventArgs eventarg)
-        {
-            eventarg.Powernet.AddDevice(this);
-        }
 
-        private void PowernetDisconnect(object sender, PowernetEventArgs eventarg)
+        protected override void PowernetDisconnect(object sender, PowernetEventArgs eventarg)
         {
-            eventarg.Powernet.RemoveDevice(this);
+            base.PowernetDisconnect(sender, eventarg);
-            Connected = DrawTypes.None;
 
             //We don't want to make the devices under us think we're still a valid provider if we have no powernet to connect to
-            foreach (var device in Deviceloadlist)
+            foreach (var device in DeviceLoadList.ToList())
             {
                 device.RemoveProvider(this);
             }
@@ -161,7 +159,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void AddDevice(PowerDeviceComponent device)
         {
-            Deviceloadlist.Add(device);
+            DeviceLoadList.Add(device);
             Load += device.Load;
             if (!device.Powered)
                 DepoweredDevices.Add(device);
@@ -172,7 +170,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void UpdateDevice(PowerDeviceComponent device, float oldLoad)
         {
-            if (Deviceloadlist.Contains(device))
+            if (DeviceLoadList.Contains(device))
             {
                 Load -= oldLoad;
                 Load += device.Load;
@@ -184,10 +182,10 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void RemoveDevice(PowerDeviceComponent device)
         {
-            if (Deviceloadlist.Contains(device))
+            if (DeviceLoadList.Contains(device))
             {
                 Load -= device.Load;
-                Deviceloadlist.Remove(device);
+                DeviceLoadList.Remove(device);
                 if (DepoweredDevices.Contains(device))
                     DepoweredDevices.Remove(device);
             }

Content.Server/GameObjects/Components/Power/PowerStorageComponent.cs

@@ -156,7 +156,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void ChargePowerTick()
         {
-            Charge = Math.Max(Charge + ChargeRate, Capacity);
+            Charge = Math.Min(Charge + ChargeRate, Capacity);
         }
 
         /// <summary>

Content.Server/GameObjects/Components/Power/PowerTransferComponent.cs

@@ -25,7 +25,7 @@ namespace Content.Server.GameObjects.Components.Power
 
         public override void Initialize()
         {
-            if(Parent == null)
+            if (Parent == null)
             {
                 SpreadPowernet();
             }
@@ -49,7 +49,7 @@ namespace Content.Server.GameObjects.Components.Power
                         .Where(x => x.HasComponent<PowerTransferComponent>());
 
             //we have no parent so lets find a partner we can join his powernet
-            if(Parent == null || Regenerating)
+            if (Parent == null || Regenerating)
             {
                 foreach (var wire in wires)
                 {
@@ -74,13 +74,13 @@ namespace Content.Server.GameObjects.Components.Power
                         .Where(x => x.HasComponent<PowerNodeComponent>())
                         .Select(x => x.GetComponent<PowerNodeComponent>());
 
-            foreach(var node in nodes)
+            foreach (var node in nodes)
             {
-                if(node.Parent == null)
+                if (node.Parent == null)
                 {
                     node.ConnectToPowernet(Parent);
                 }
-                else if(node.Parent.Dirty)
+                else if (node.Parent.Dirty)
                 {
                     node.RegeneratePowernet(Parent);
                 }
@@ -95,7 +95,7 @@ namespace Content.Server.GameObjects.Components.Power
                     ptc.ConnectToPowernet(Parent);
                     SpreadPowernet();
                 }
-                else if(ptc.Parent != Parent && !ptc.Parent.Dirty)
+                else if (ptc.Parent != Parent && !ptc.Parent.Dirty)
                 {
                     Parent.MergePowernets(ptc.Parent);
                 }
@@ -109,7 +109,7 @@ namespace Content.Server.GameObjects.Components.Power
         public void ConnectToPowernet(Powernet toconnect)
         {
             Parent = toconnect;
-            Parent.Wirelist.Add(this);
+            Parent.WireList.Add(this);
             Regenerating = false;
         }
 
@@ -118,7 +118,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void DisconnectFromPowernet()
         {
-            Parent.Wirelist.Remove(this);
+            Parent.WireList.Remove(this);
             Parent.Dirty = true;
             Parent = null;
         }
@@ -131,7 +131,7 @@ namespace Content.Server.GameObjects.Components.Power
 
         public bool Attackby(IEntity user, IEntity attackwith)
         {
-            if(attackwith.TryGetComponent(out WirecutterComponent wirecutter))
+            if (attackwith.TryGetComponent(out WirecutterComponent wirecutter))
             {
                 Owner.Delete();
                 return true;

Content.Server/GameObjects/Components/Power/PoweredLightComponent.cs

@@ -0,0 +1,33 @@
+using SS14.Server.GameObjects;
+using SS14.Shared.Enums;
+using SS14.Shared.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Power
+{
+    public class PoweredLightComponent : Component
+    {
+        public override string Name => "PoweredLight";
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            var device = Owner.GetComponent<PowerDeviceComponent>();
+            var sprite = Owner.GetComponent<SpriteComponent>();
+            var light = Owner.GetComponent<PointLightComponent>();
+            device.OnPowerStateChanged += (sender, args) =>
+            {
+                if (args.Powered)
+                {
+                    sprite.LayerSetTexture(0, "Objects/wall_light.png");
+                    light.State = LightState.On;
+                }
+                else
+                {
+                    sprite.LayerSetTexture(0, "Objects/wall_light_off.png");
+                    light.State = LightState.Off;
+                }
+            };
+        }
+    }
+}

Content.Server/GameObjects/Components/Power/Powernet.cs

@@ -15,28 +15,32 @@ namespace Content.Server.GameObjects.Components.Power
         public Powernet()
         {
             var EntitySystemManager = IoCManager.Resolve<IEntitySystemManager>();
-            EntitySystemManager.GetEntitySystem<PowerSystem>().Powernets.Add(this);
+            var powerSystem = EntitySystemManager.GetEntitySystem<PowerSystem>();
+            powerSystem.Powernets.Add(this);
+            Uid = powerSystem.NewUid();
         }
 
+        public int Uid { get; }
+
         /// <summary>
         /// The entities that make up the powernet's physical location and allow powernet connection
         /// </summary>
-        public List<PowerTransferComponent> Wirelist { get; set; } = new List<PowerTransferComponent>();
+        public List<PowerTransferComponent> WireList { get; set; } = new List<PowerTransferComponent>();
 
         /// <summary>
         /// Entities that connect directly to the powernet through PTC above to add power or add power load
         /// </summary>
-        public List<PowerNodeComponent> Nodelist { get; set; } = new List<PowerNodeComponent>();
+        public List<PowerNodeComponent> NodeList { get; set; } = new List<PowerNodeComponent>();
 
         /// <summary>
         /// Subset of nodelist that adds a continuous power supply to the network
         /// </summary>
-        public Dictionary<PowerGeneratorComponent, float> Generatorlist { get; set; } = new Dictionary<PowerGeneratorComponent, float>();
+        public Dictionary<PowerGeneratorComponent, float> GeneratorList { get; set; } = new Dictionary<PowerGeneratorComponent, float>();
 
         /// <summary>
         /// Subset of nodelist that draw power, stores information on current continuous powernet load
         /// </summary>
-        public SortedSet<PowerDeviceComponent> Deviceloadlist { get; set; } = new SortedSet<PowerDeviceComponent>(new DevicePriorityCompare());
+        public SortedSet<PowerDeviceComponent> DeviceLoadList { get; set; } = new SortedSet<PowerDeviceComponent>(new DevicePriorityCompare());
 
         /// <summary>
         /// Comparer that keeps the device dictionary sorted by powernet priority
@@ -156,9 +160,9 @@ namespace Content.Server.GameObjects.Components.Power
                 var depowervalue = activeload - (activesupply + passivesupply);
 
                 //Providers use same method to recreate functionality
-                foreach (var device in Deviceloadlist)
+                foreach (var device in DeviceLoadList)
                 {
-                    device.Powered = false;
+                    device.ExternalPowered = false;
                     DepoweredDevices.Add(device);
                     depowervalue -= device.Load;
                     if (depowervalue < 0)
@@ -171,7 +175,7 @@ namespace Content.Server.GameObjects.Components.Power
         {
             foreach (var device in DepoweredDevices)
             {
-                device.Powered = true;
+                device.ExternalPowered = true;
             }
             DepoweredDevices.Clear();
         }
@@ -205,13 +209,13 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void DirtyKill()
         {
-            Wirelist.Clear();
+            WireList.Clear();
-            while (Nodelist.Count != 0)
+            while (NodeList.Count != 0)
             {
-                Nodelist[0].DisconnectFromPowernet();
+                NodeList[0].DisconnectFromPowernet();
             }
-            Generatorlist.Clear();
+            GeneratorList.Clear();
-            Deviceloadlist.Clear();
+            DeviceLoadList.Clear();
             DepoweredDevices.Clear();
             PowerStorageSupplierlist.Clear();
             PowerStorageConsumerlist.Clear();
@@ -226,31 +230,31 @@ namespace Content.Server.GameObjects.Components.Power
         {
             //TODO: load balance reconciliation between powernets on merge tick here
 
-            foreach (var wire in toMerge.Wirelist)
+            foreach (var wire in toMerge.WireList)
             {
                 wire.Parent = this;
             }
-            Wirelist.AddRange(toMerge.Wirelist);
+            WireList.AddRange(toMerge.WireList);
-            toMerge.Wirelist.Clear();
+            toMerge.WireList.Clear();
 
-            foreach (var node in toMerge.Nodelist)
+            foreach (var node in toMerge.NodeList)
             {
                 node.Parent = this;
             }
-            Nodelist.AddRange(toMerge.Nodelist);
+            NodeList.AddRange(toMerge.NodeList);
-            toMerge.Nodelist.Clear();
+            toMerge.NodeList.Clear();
 
-            foreach (var generator in toMerge.Generatorlist)
+            foreach (var generator in toMerge.GeneratorList)
             {
-                Generatorlist.Add(generator.Key, generator.Value);
+                GeneratorList.Add(generator.Key, generator.Value);
             }
-            toMerge.Generatorlist.Clear();
+            toMerge.GeneratorList.Clear();
 
-            foreach (var device in toMerge.Deviceloadlist)
+            foreach (var device in toMerge.DeviceLoadList)
             {
-                Deviceloadlist.Add(device);
+                DeviceLoadList.Add(device);
             }
-            toMerge.Deviceloadlist.Clear();
+            toMerge.DeviceLoadList.Clear();
 
             DepoweredDevices.AddRange(toMerge.DepoweredDevices);
             toMerge.DepoweredDevices.Clear();
@@ -280,7 +284,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void AddDevice(PowerDeviceComponent device)
         {
-            Deviceloadlist.Add(device);
+            DeviceLoadList.Add(device);
             Load += device.Load;
             if (!device.Powered)
                 DepoweredDevices.Add(device);
@@ -291,7 +295,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void UpdateDevice(PowerDeviceComponent device, float oldLoad)
         {
-            if (Deviceloadlist.Contains(device))
+            if (DeviceLoadList.Contains(device))
             {
                 Load -= oldLoad;
                 Load += device.Load;
@@ -303,10 +307,10 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void RemoveDevice(PowerDeviceComponent device)
         {
-            if (Deviceloadlist.Contains(device))
+            if (DeviceLoadList.Contains(device))
             {
                 Load -= device.Load;
-                Deviceloadlist.Remove(device);
+                DeviceLoadList.Remove(device);
                 if (DepoweredDevices.Contains(device))
                     DepoweredDevices.Remove(device);
             }
@@ -322,7 +326,7 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void AddGenerator(PowerGeneratorComponent generator)
         {
-            Generatorlist.Add(generator, generator.Supply);
+            GeneratorList.Add(generator, generator.Supply);
             Supply += generator.Supply;
         }
 
@@ -331,10 +335,10 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void UpdateGenerator(PowerGeneratorComponent generator)
         {
-            if (Generatorlist.ContainsKey(generator))
+            if (GeneratorList.ContainsKey(generator))
             {
-                Supply -= Generatorlist[generator];
+                Supply -= GeneratorList[generator];
-                Generatorlist[generator] = generator.Supply;
+                GeneratorList[generator] = generator.Supply;
                 Supply += generator.Supply;
             }
         }
@@ -344,10 +348,10 @@ namespace Content.Server.GameObjects.Components.Power
         /// </summary>
         public void RemoveGenerator(PowerGeneratorComponent generator)
         {
-            if (Generatorlist.ContainsKey(generator))
+            if (GeneratorList.ContainsKey(generator))
             {
-                Supply -= Generatorlist[generator];
+                Supply -= GeneratorList[generator];
-                Generatorlist.Remove(generator);
+                GeneratorList.Remove(generator);
             }
             else
             {

Content.Server/GameObjects/Components/Weapon/Melee/MeleeWeaponComponent.cs

@@ -31,18 +31,18 @@ namespace Content.Server.GameObjects.Components.Weapon.Melee
 
         }
 
-        void IAfterAttack.Afterattack(IEntity user, LocalCoordinates clicklocation)
+        void IAfterAttack.Afterattack(IEntity user, LocalCoordinates clicklocation, IEntity attacked)
         {
             var location = user.GetComponent<TransformComponent>().LocalPosition;
             var angle = new Angle(clicklocation.ToWorld().Position - location.ToWorld().Position);
             var entities = IoCManager.Resolve<IServerEntityManager>().GetEntitiesInArc(user.GetComponent<TransformComponent>().LocalPosition, Range, angle, ArcWidth);
 
-            foreach(var entity in entities)
+            foreach (var entity in entities)
             {
                 if (!entity.GetComponent<TransformComponent>().IsMapTransform || entity == user)
                     continue;
 
-                if(entity.TryGetComponent(out DamageableComponent damagecomponent))
+                if (entity.TryGetComponent(out DamageableComponent damagecomponent))
                 {
                     damagecomponent.TakeDamage(DamageType.Brute, Damage);
                 }

Content.Server/GameObjects/Components/Weapon/Ranged/RangedWeapon.cs

@@ -9,9 +9,9 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged
     {
         public override string Name => "RangedWeapon";
 
-        void IAfterAttack.Afterattack(IEntity user, LocalCoordinates clicklocation)
+        void IAfterAttack.Afterattack(IEntity user, LocalCoordinates clicklocation, IEntity attacked)
         {
-            if(UserCanFire(user) && WeaponCanFire())
+            if (UserCanFire(user) && WeaponCanFire())
             {
                 Fire(user, clicklocation);
             }

Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs

@@ -65,7 +65,8 @@ namespace Content.Server.GameObjects.EntitySystems
         /// </summary>
         /// <param name="user"></param>
         /// <param name="clicklocation"></param>
-        void Afterattack(IEntity user, LocalCoordinates clicklocation);
+        /// <param name="attacked">The entity that was clicked on out of range. May be null if no entity was clicked on.true</param>
+        void Afterattack(IEntity user, LocalCoordinates clicklocation, IEntity attacked);
     }
 
     /// <summary>
@@ -198,7 +199,7 @@ namespace Content.Server.GameObjects.EntitySystems
 
             for (var i = 0; i < afterattacks.Count; i++)
             {
-                afterattacks[i].Afterattack(user, clicklocation);
+                afterattacks[i].Afterattack(user, clicklocation, null);
             }
         }
 
@@ -229,7 +230,7 @@ namespace Content.Server.GameObjects.EntitySystems
 
             for (var i = 0; i < afterattacks.Count; i++)
             {
-                afterattacks[i].Afterattack(user, clicklocation);
+                afterattacks[i].Afterattack(user, clicklocation, attacked);
             }
         }
 
@@ -315,7 +316,7 @@ namespace Content.Server.GameObjects.EntitySystems
                 //See if we have a ranged attack interaction
                 for (var i = 0; i < afterattacks.Count; i++)
                 {
-                    afterattacks[i].Afterattack(user, clicklocation);
+                    afterattacks[i].Afterattack(user, clicklocation, attacked);
                 }
             }
         }

Content.Server/GameObjects/EntitySystems/PowerSystem.cs

@@ -1,5 +1,7 @@
 using Content.Server.GameObjects.Components.Power;
 using SS14.Shared.GameObjects.System;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.IoC;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,6 +14,21 @@ namespace Content.Shared.GameObjects.EntitySystems
     {
         public List<Powernet> Powernets = new List<Powernet>();
 
+        private IComponentManager componentManager;
+
+        private int _lastUid = 0;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            componentManager = IoCManager.Resolve<IComponentManager>();
+        }
+
+        public int NewUid()
+        {
+            return ++_lastUid;
+        }
+
         public override void Update(float frametime)
         {
             for (int i = 0; i < Powernets.Count; i++)
@@ -20,12 +37,12 @@ namespace Content.Shared.GameObjects.EntitySystems
                 if (powernet.Dirty)
                 {
                     //Tell all the wires of this net to be prepared to create/join new powernets
-                    foreach (var wire in powernet.Wirelist)
+                    foreach (var wire in powernet.WireList)
                     {
                         wire.Regenerating = true;
                     }
 
-                    foreach (var wire in powernet.Wirelist)
+                    foreach (var wire in powernet.WireList)
                     {
                         //Only a few wires should pass this if check since each will create and take all the others into its powernet
                         if (wire.Regenerating)
@@ -38,10 +55,16 @@ namespace Content.Shared.GameObjects.EntitySystems
                 }
             }
 
-            foreach(var powernet in Powernets)
+            foreach (var powernet in Powernets)
             {
                 powernet.Update(frametime);
             }
+
+            // Draw power for devices not connected to anything.
+            foreach (var device in componentManager.GetComponents<PowerDeviceComponent>())
+            {
+                device.ProcessInternalPower(frametime);
+            }
         }
     }
 }

Content.Shared/Content.Shared.csproj

@@ -72,6 +72,7 @@
     <Compile Include="GameObjects\PhysicalConstants.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="GameObjects\Components\Items\SharedHandsComponent.cs" />
+    <Compile Include="GameObjects\Components\Power\SharedPowerDebugTool.cs" />
     <Compile Include="Maths\PhysicalConstants.cs" />
   </ItemGroup>
   <ItemGroup>

Content.Shared/GameObjects/Components/Power/SharedPowerDebugTool.cs

@@ -0,0 +1,24 @@
+using System;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Power
+{
+    public class SharedPowerDebugTool : Component
+    {
+        public override string Name => "PowerDebugTool";
+        public override uint? NetID => ContentNetIDs.POWER_DEBUG_TOOL;
+
+        [Serializable, NetSerializable]
+        protected class OpenDataWindowMsg : ComponentMessage
+        {
+            public string Data { get; }
+
+            public OpenDataWindowMsg(string data)
+            {
+                Directed = true;
+                Data = data;
+            }
+        }
+    }
+}

Content.Shared/GameObjects/ContentNetIDs.cs

@@ -9,5 +9,6 @@
         public const uint HANDS = 1003;
         public const uint STORAGE = 1005;
         public const uint INVENTORY = 1006;
+        public const uint POWER_DEBUG_TOOL = 1007;
     }
 }

Resources/Prototypes/Entities/Power.yml

@@ -57,6 +57,7 @@
   - type: PowerProvider
     Range: 5
     Priority: Provider
+    Load: 0
 
 - type: entity
   parent: WPPnobattery

Resources/Prototypes/Entities/PoweredLighting.yml

@@ -0,0 +1,17 @@
+- type: entity
+  name: Light
+  id: poweredlight
+  parent: __engine_wall_light
+  components:
+  # So we can click on it for deletion.
+  - type: BoundingBox
+  - type: Sprite
+    texture: Objects/wall_light_off.png
+
+  - type: PowerDevice
+    load: 1
+    priority: Low
+
+  - type: PoweredLight
+  - type: PointLight
+    state: Off

Resources/Prototypes/Entities/Tools.yml

@@ -81,3 +81,4 @@
     texture: Objects/multitool.png
   - type: Icon
     texture: Objects/multitool.png
+  - type: PowerDebugTool