worldtype: Add PVP_WORLD_TYPES and isPvpWorld

runelite-api/src/main/java/net/runelite/api/WorldType.java

@@ -24,6 +24,7 @@
  */
 package net.runelite.api;
 
+import java.util.Collection;
 import java.util.EnumSet;
 
 /**
@@ -75,6 +76,13 @@ public enum WorldType
 		this.mask = mask;
 	}
 
+	private static EnumSet<WorldType> PVP_WORLD_TYPES = EnumSet.of(
+		DEADMAN,
+		PVP,
+		PVP_HIGH_RISK,
+		SEASONAL_DEADMAN
+	);
+
 	/**
 	 * Create enum set of world types from mask.
 	 *
@@ -113,4 +121,16 @@ public enum WorldType
 
 		return mask;
 	}
-}
+
+	/**
+	 * Checks whether a world having a {@link Collection} of {@link WorldType}s is a PVP world.
+	 *
+	 * @param worldTypes A {@link Collection} of {@link WorldType}s describing the given world.
+	 * @return           True if the given worldtypes of the world are a PVP world, false otherwise.
+	 * @see Client#getWorldType()
+	 */
+	public static boolean isPvpWorld(final Collection<WorldType> worldTypes)
+	{
+		return worldTypes.stream().anyMatch(PVP_WORLD_TYPES::contains);
+	}
+}