Determine whether Ice Prison target is valid. Fixes PC-281

Plugins/Mineplex.Game.Clans/src/mineplex/game/clans/clans/ClansManager.java

@@ -325,6 +325,14 @@ public class ClansManager extends MiniClientPlugin<ClientClan>implements IRelati
 		skillManager.RemoveSkill("Dwarf Toss", "Block Toss");
 		skillManager.removeSkill("Whirlwind Axe");
 		skillManager.removeSkill("Shield Smash");
+		// Check if any Ice Prison blocks will be placed inside a safe zone
+		// fixme Is there any way of checking the destination beforehand?
+		// Although if the user is trying to launch an Ice Prison into a safezone they should know better
+		skillManager.GetSkill("Ice Prison").setLocationFilter(location ->
+		{
+			ClanTerritory territory = _clanUtility.getClaim(location);
+			return territory == null || !territory.Safe;
+		});
 		
 		_worldEvent.setFactory(skillManager);
 		_classManager = new ClassManager(plugin, _clientManager, donationManager, skillManager, itemFactory, webServerAddress);

Plugins/Mineplex.Minecraft.Game.ClassCombat/src/mineplex/minecraft/game/classcombat/Skill/ISkill.java

@@ -39,4 +39,7 @@ public interface ISkill
 	int getMaxLevel();
 	
 	boolean isAchievementSkill();
+
+	void setLocationFilter(LocationFilter locationFilter);
+	LocationFilter getLocationFilter();
 }

Plugins/Mineplex.Minecraft.Game.ClassCombat/src/mineplex/minecraft/game/classcombat/Skill/LocationFilter.java

@@ -0,0 +1,18 @@
+package mineplex.minecraft.game.classcombat.Skill;
+
+import org.bukkit.Location;
+
+/*
+ * Determines whether a location is acceptable for an action to be performed
+ */
+public interface LocationFilter
+{
+	LocationFilter ACCEPT_ALL = location -> true;
+
+	/*
+	 * Check if the given location is acceptable
+	 * @param location The location to check
+	 * @return Whether the location is valid, or invalid
+	 */
+	boolean accept(Location location);
+}

Plugins/Mineplex.Minecraft.Game.ClassCombat/src/mineplex/minecraft/game/classcombat/Skill/Mage/IcePrison.java

@@ -1,6 +1,8 @@
 package mineplex.minecraft.game.classcombat.Skill.Mage;
 
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
 
 import org.bukkit.Effect;
 import org.bukkit.Material;
@@ -118,6 +120,9 @@ public class IcePrison extends SkillActive implements IThrown
 
 		//Sphere
 		HashMap<Block, Double> blocks = UtilBlock.getInRadius(block, 3.8d);
+		// To save having to calculate everything again
+		Set<Block> acceptable = new HashSet<>();
+		boolean failed = false;
 		for (Block cur : blocks.keySet()) 
 		{
 			if (!UtilBlock.airFoliage(cur))
@@ -129,8 +134,28 @@ public class IcePrison extends SkillActive implements IThrown
 			//Leave roof hole
 			if (cur.getX() == block.getX() && cur.getZ() == block.getZ() && cur.getY() > block.getY())
 				continue;
-			
-			FreezeBlock(cur, block, level);
+
+			if (getLocationFilter().accept(cur.getLocation()))
+			{
+				acceptable.add(cur);
+			}
+			else
+			{
+				failed = true;
+				break;
+			}
+		}
+
+		if (!failed)
+		{
+			for (Block cur : acceptable)
+			{
+				FreezeBlock(cur, block, level);
+			}
+		}
+		else
+		{
+			UtilPlayer.message(player, F.main("Skill", "You cannot use " + F.skill(GetName()) + " here."));
 		}
 
 		/*

Plugins/Mineplex.Minecraft.Game.ClassCombat/src/mineplex/minecraft/game/classcombat/Skill/Skill.java

@@ -12,7 +12,6 @@ import mineplex.core.common.util.UtilTextBottom;
 import mineplex.minecraft.game.classcombat.Class.IPvpClass.ClassType;
 import mineplex.minecraft.game.classcombat.Skill.repository.token.SkillToken;
 
-import org.bukkit.ChatColor;
 import org.bukkit.Material;
 import org.bukkit.Sound;
 import org.bukkit.entity.Entity;
@@ -43,6 +42,8 @@ public abstract class Skill implements ISkill, Listener
 	
 	private boolean _isAchievementSkill = false;
 
+	private LocationFilter _locationFilter = LocationFilter.ACCEPT_ALL;
+
 	public SkillFactory Factory;
 
 	public Skill(SkillFactory skills, String name, ClassType classType, SkillType skillType, int cost, int maxLevel)
@@ -357,4 +358,16 @@ public abstract class Skill implements ISkill, Listener
 	{
 		return _isAchievementSkill;
 	}
+
+	@Override
+	public void setLocationFilter(LocationFilter filter)
+	{
+		this._locationFilter = filter;
+	}
+
+	@Override
+	public LocationFilter getLocationFilter()
+	{
+		return this._locationFilter;
+	}
 }