Implement GrantExternalConditionToCrusher.

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -302,6 +302,7 @@
     <Compile Include="Traits\Burns.cs" />
     <Compile Include="Traits\ChangesTerrain.cs" />
     <Compile Include="Traits\CommandBarBlacklist.cs" />
+    <Compile Include="Traits\Conditions\GrantExternalConditionToCrusher.cs" />
     <Compile Include="Traits\Conditions\GrantRandomCondition.cs" />
     <Compile Include="Traits\Contrail.cs" />
     <Compile Include="Traits\TooltipDescription.cs" />

OpenRA.Mods.Common/Traits/Conditions/GrantExternalConditionToCrusher.cs

@@ -0,0 +1,63 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Grant a condition to the crushing actor.")]
+	public class GrantExternalConditionToCrusherInfo : ITraitInfo
+	{
+		[Desc("The condition to apply on a crush attempt. Must be included among the crusher actor's ExternalCondition traits.")]
+		public readonly string WarnCrushCondition = null;
+
+		[Desc("Duration of the condition applied on a crush attempt (in ticks). Set to 0 for a permanent condition.")]
+		public readonly int WarnCrushDuration = 0;
+
+		[Desc("The condition to apply on a successful crush. Must be included among the crusher actor's ExternalCondition traits.")]
+		public readonly string OnCrushCondition = null;
+
+		[Desc("Duration of the condition applied on a successful crush (in ticks). Set to 0 for a permanent condition.")]
+		public readonly int OnCrushDuration = 0;
+
+		public virtual object Create(ActorInitializer init) { return new GrantExternalConditionToCrusher(init.Self, this); }
+	}
+
+	public class GrantExternalConditionToCrusher : INotifyCrushed
+	{
+		public readonly GrantExternalConditionToCrusherInfo Info;
+
+		public GrantExternalConditionToCrusher(Actor self, GrantExternalConditionToCrusherInfo info)
+		{
+			this.Info = info;
+		}
+
+		void INotifyCrushed.OnCrush(Actor self, Actor crusher, HashSet<string> crushClasses)
+		{
+			var external = crusher.TraitsImplementing<ExternalCondition>()
+				.FirstOrDefault(t => t.Info.Condition == Info.OnCrushCondition && t.CanGrantCondition(crusher, self));
+
+			if (external != null)
+				external.GrantCondition(crusher, self, Info.OnCrushDuration);
+		}
+
+		void INotifyCrushed.WarnCrush(Actor self, Actor crusher, HashSet<string> crushClasses)
+		{
+			var external = crusher.TraitsImplementing<ExternalCondition>()
+				.FirstOrDefault(t => t.Info.Condition == Info.WarnCrushCondition && t.CanGrantCondition(crusher, self));
+
+			if (external != null)
+				external.GrantCondition(crusher, self, Info.WarnCrushDuration);
+		}
+	}
+}