BodySystem stuff 2: overused boogaloo (#1174)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Server/Health/BodySystem/Surgery/Surgeon/ISurgeon.cs

@@ -0,0 +1,30 @@
+using Content.Shared.BodySystem;
+using Robust.Shared.Interfaces.GameObjects;
+using System;
+using System.Collections.Generic;
+
+namespace Content.Server.BodySystem
+{
+
+    /// <summary>
+    ///     Interface representing an entity capable of performing surgery (performing operations on an <see cref="ISurgeryData"/> class).
+    ///     For an example see <see cref="SurgeryToolComponent"/>, which inherits from this class.
+    /// </summary>	
+    public interface ISurgeon
+    {
+        /// <summary>
+        ///     How long it takes to perform a single surgery step (in seconds).
+        /// </summary>	       
+        public float BaseOperationTime { get; set; }
+
+        
+        public delegate void MechanismRequestCallback(Mechanism target, IBodyPartContainer container, ISurgeon surgeon, IEntity performer);
+
+        /// <summary>
+        ///     When performing a surgery, the <see cref="ISurgeryData"/> may sometimes require selecting from a set of Mechanisms to operate on.
+        ///     This function is called in that scenario, and it is expected that you call the callback with one mechanism from the provided list.
+        /// </summary>	
+        public void RequestMechanism(List<Mechanism> options, MechanismRequestCallback callback);
+    }
+
+}