Re-organize all projects (#4166)

Content.Server/Body/Behavior/HeartBehavior.cs

@@ -0,0 +1,29 @@
+using Content.Shared.Body.Networks;
+
+namespace Content.Server.Body.Behavior
+{
+    public class HeartBehavior : MechanismBehavior
+    {
+        private float _accumulatedFrameTime;
+
+        public override void Update(float frameTime)
+        {
+            // TODO BODY do between pre and metabolism
+            if (Parent.Body == null ||
+                !Parent.Body.Owner.HasComponent<SharedBloodstreamComponent>())
+            {
+                return;
+            }
+
+            // Update at most once per second
+            _accumulatedFrameTime += frameTime;
+
+            // TODO: Move/accept/process bloodstream reagents only when the heart is pumping
+            if (_accumulatedFrameTime >= 1)
+            {
+                // bloodstream.Update(_accumulatedFrameTime);
+                _accumulatedFrameTime -= 1;
+            }
+        }
+    }
+}