Re-organize all projects (#4166)

Content.Shared/EffectBlocker/EffectBlockerExtensions.cs

@@ -0,0 +1,18 @@
+#nullable enable
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.EffectBlocker
+{
+    public static class EffectBlockerExtensions
+    {
+        public static bool CanFall(this IEntity entity)
+        {
+            return EffectBlockerSystem.CanFall(entity);
+        }
+
+        public static bool CanSlip(this IEntity entity)
+        {
+            return EffectBlockerSystem.CanSlip(entity);
+        }
+    }
+}

Content.Shared/EffectBlocker/EffectBlockerSystem.cs

@@ -0,0 +1,39 @@
+#nullable enable
+using Content.Shared.ActionBlocker;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.EffectBlocker
+{
+    /// <summary>
+    /// Utility methods to check if an effect is allowed to affect a specific entity.
+    /// For actions see <see cref="ActionBlockerSystem"/>
+    /// </summary>
+    [UsedImplicitly]
+    public class EffectBlockerSystem : EntitySystem
+    {
+        public static bool CanFall(IEntity entity)
+        {
+            var canFall = true;
+
+            foreach (var blocker in entity.GetAllComponents<IEffectBlocker>())
+            {
+                canFall &= blocker.CanFall(); // Sets var to false if false
+            }
+
+            return canFall;
+        }
+
+        public static bool CanSlip(IEntity entity)
+        {
+            var canSlip = true;
+
+            foreach (var blocker in entity.GetAllComponents<IEffectBlocker>())
+            {
+                canSlip &= blocker.CanSlip(); // Sets var to false if false
+            }
+
+            return canSlip;
+        }
+    }
+}

Content.Shared/EffectBlocker/IEffectBlocker.cs

@@ -0,0 +1,15 @@
+#nullable enable
+using Content.Shared.ActionBlocker;
+
+namespace Content.Shared.EffectBlocker
+{
+    /// <summary>
+    /// This interface gives components the ability to block certain effects
+    /// from affecting the owning entity. For actions see <see cref="IActionBlocker"/>
+    /// </summary>
+    public interface IEffectBlocker
+    {
+        bool CanFall() => true;
+        bool CanSlip() => true;
+    }
+}