Disease stages (#8405)

* Added the stages , time to implelement them

* adjusted the zombie code to fit within the new staged system

* because I forgot it starts at 0

* mmmm Mistaken

* Removed unused comp

* removed DiseaseBuildup comp from IgnoredComponents.cs

* Resolved review

* Delete IgnoredComponents.cs

* Resolved review

* resolved review

Co-authored-by: wrexbe <81056464+wrexbe@users.noreply.github.com>
Co-authored-by: wrexbe <wrexbe@protonmail.com>

Content.Shared/Disease/DiseaseEffect.cs

@@ -1,4 +1,5 @@
 using JetBrains.Annotations;
+using Robust.Shared.Utility;
 
 namespace Content.Shared.Disease
 {
@@ -15,6 +16,38 @@ namespace Content.Shared.Disease
         /// What effect the disease will have.
         /// </summary>
         public abstract void Effect(DiseaseEffectArgs args);
+
+        /// <summary>
+        /// What is the minimal severity needed for this effect to occur?
+        /// </summary>
+        [DataField("minSeverity")]
+        public float MinSeverity
+        {
+            get => _minSeverity;
+            set
+            {
+                DebugTools.Assert(value > 1f || value < 0f ,"MinSeverity have been attempted to be set out of range");
+                _minSeverity = Math.Clamp(value, 0.0f, 1.0f);
+            }
+        }
+
+        private float _minSeverity = 0.0f;
+
+        /// <summary>
+        /// What is the maximum severity that this effect can occur?
+        /// </summary>
+        [DataField("maxSeverity")]
+        public float MaxSeverity
+        {
+            get => _maxSeverity;
+            set
+            {
+                DebugTools.Assert(value > 1f || value < 0f ,"MaxSeverity have been attempted to be set out of range");
+                _maxSeverity = Math.Clamp(value, 0.0f, 1.0f);
+            }
+        }
+
+        private float _maxSeverity = 1.0f;
     }
     /// <summary>
     /// What you have to work with in any disease effect/cure.

Content.Shared/Disease/DiseasePrototype.cs

@@ -36,6 +36,17 @@ namespace Content.Shared.Disease
         /// it needs something to control its tickrate
         /// </summary>
         public float Accumulator = 0f;
+
+        /// <summary>
+        /// This controls the progression of the disease, used to stage disease effects
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float DiseaseSeverity
+        {
+            get => _diseaseServerity;
+            set => _diseaseServerity = Math.Clamp(value, 0f, 1f);
+        }
+        private float _diseaseServerity = 0f;
         /// <summary>
         /// List of effects the disease has that will
         /// run every second (by default anyway)