Pow3r: stage 1 (#4208)

Co-authored-by: 20kdc <asdd2808@gmail.com>

Content.Server/Power/Components/CablePlacerComponent.cs

@@ -0,0 +1,58 @@
+#nullable enable
+using System.Threading.Tasks;
+using Content.Server.Stack;
+using Content.Shared.Interaction;
+using Content.Shared.Interaction.Helpers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Power.Components
+{
+    [RegisterComponent]
+    internal class CablePlacerComponent : Component, IAfterInteract
+    {
+        [Dependency] private readonly IMapManager _mapManager = default!;
+
+        /// <inheritdoc />
+        public override string Name => "CablePlacer";
+
+        [ViewVariables]
+        [DataField("cablePrototypeID")]
+        private string? _cablePrototypeID = "CableHV";
+
+        [ViewVariables]
+        [DataField("blockingWireType")]
+        private CableType _blockingCableType = CableType.HighVoltage;
+
+        /// <inheritdoc />
+        async Task<bool> IAfterInteract.AfterInteract(AfterInteractEventArgs eventArgs)
+        {
+            if (_cablePrototypeID == null)
+                return true;
+            if (!eventArgs.InRangeUnobstructed(ignoreInsideBlocker: true, popup: true))
+                return true;
+            if(!_mapManager.TryGetGrid(eventArgs.ClickLocation.GetGridId(Owner.EntityManager), out var grid))
+                return true;
+            var snapPos = grid.TileIndicesFor(eventArgs.ClickLocation);
+            if(grid.GetTileRef(snapPos).Tile.IsEmpty)
+                return true;
+            foreach (var anchored in grid.GetAnchoredEntities(snapPos))
+            {
+                if (Owner.EntityManager.ComponentManager.TryGetComponent<CableComponent>(anchored, out var wire) && wire.CableType == _blockingCableType)
+                {
+                    return true;
+                }
+            }
+
+            if (Owner.TryGetComponent<StackComponent>(out var stack)
+                && !EntitySystem.Get<StackSystem>().Use(Owner.Uid, stack, 1))
+                return true;
+
+            Owner.EntityManager.SpawnEntity(_cablePrototypeID, grid.GridTileToLocal(snapPos));
+            return true;
+        }
+    }
+}