ChemicalInjectionProjectileComponent (#2657)

Co-authored-by: py01 <pyronetics01@gmail.com>

Content.Server/GameObjects/Components/Projectiles/ChemicalInjectionProjectileComponent.cs

@@ -0,0 +1,55 @@
+using Content.Server.GameObjects.Components.Body.Circulatory;
+using Content.Server.GameObjects.Components.Chemistry;
+using Content.Shared.Chemistry;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Components;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+using System;
+
+namespace Content.Server.GameObjects.Components.Projectiles
+{
+    [RegisterComponent]
+    public class ChemicalInjectionProjectileComponent : Component, ICollideBehavior
+    {
+        public override string Name => "ChemicalInjectionProjectile";
+
+        [ViewVariables]
+        private SolutionContainerComponent _solutionContainer;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public ReagentUnit TransferAmount { get; set; }
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float TransferEfficiency { get => _transferEfficiency; set => _transferEfficiency = Math.Clamp(value, 0, 1); }
+        private float _transferEfficiency;
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+            serializer.DataField(this, x => x.TransferAmount, "transferAmount", ReagentUnit.New(1));
+            serializer.DataField(ref _transferEfficiency, "transferEfficiency", 1f);
+        }
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            _solutionContainer = Owner.EnsureComponent<SolutionContainerComponent>();
+        }
+
+        void ICollideBehavior.CollideWith(IEntity entity)
+        {
+            if (!entity.TryGetComponent<BloodstreamComponent>(out var bloodstream))
+                return;
+
+            var solution = _solutionContainer.Solution;
+            var solRemoved = solution.SplitSolution(TransferAmount);
+            var solRemovedVol = solRemoved.TotalVolume;
+
+            var solToInject = solRemoved.SplitSolution(solRemovedVol * TransferEfficiency);
+
+            bloodstream.TryTransferSolution(solToInject);
+        }
+    }
+}