Added /GPBlockInfo

Useful for admins to set up their config files with correct IDs and data
values.

plugin.yml

@@ -140,6 +140,10 @@ commands:
    givepet:
       description: Allows a player to give away a pet he or she tamed.
       usage: /GivePet <player>
+   gpblockinfo:
+      description: Allows an administrator to get technical information about blocks in the world and items in hand.
+      usage: /GPBlockInfo
+      permission: griefprevention.gpblockinfo
 permissions:
     griefprevention.createclaims:
         description: Grants permission to create claims.
@@ -205,3 +209,6 @@ permissions:
     griefprevention.visualizenearbyclaims:
         description: Allows a player to see all nearby claims at once.
         default: op
+    griefprevention.gpblockinfo:
+        description: Grants access to /GPBlockInfo.
+        default: op

src/me/ryanhamshire/GriefPrevention/CheckForPortalTrapTask.java

@@ -0,0 +1,54 @@
+/*
+    GriefPrevention Server Plugin for Minecraft
+    Copyright (C) 2012 Ryan Hamshire
+
+    This program is free software: you can redistribute it and/or modify
+    it 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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+package me.ryanhamshire.GriefPrevention;
+
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+
+//players can be "trapped" in a portal frame if they don't have permission to break
+//solid blocks blocking them from exiting the frame
+//if that happens, we detect the problem and send them back through the portal.
+class CheckForPortalTrapTask implements Runnable 
+{
+	//player who recently teleported via nether portal 
+	private Player player;
+	
+	//where to send the player back to if he hasn't left the portal frame
+	private Location returnLocation;
+	
+	public CheckForPortalTrapTask(Player player, Location location)
+	{
+		this.player = player;
+		this.returnLocation = location;		
+	}
+	
+	@Override
+	public void run()
+	{
+		//if player has logged out, do nothing
+	    if(!this.player.isOnline()) return;
+	    
+	    //otherwise if still standing in a portal frame, teleport him back through
+	    if(this.player.getLocation().getBlock().getType() == Material.PORTAL)
+	    {
+	        this.player.teleport(this.returnLocation);
+	    }
+	}
+}

src/me/ryanhamshire/GriefPrevention/GriefPrevention.java

@@ -39,6 +39,7 @@ import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.World.Environment;
 import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
 import org.bukkit.command.*;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
@@ -49,6 +50,7 @@ import org.bukkit.inventory.PlayerInventory;
 import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.RegisteredServiceProvider;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.util.BlockIterator;
 
 public class GriefPrevention extends JavaPlugin
 {
@@ -61,6 +63,9 @@ public class GriefPrevention extends JavaPlugin
 	//this handles data storage, like player and region data
 	public DataStore dataStore;
 	
+	//this tracks item stacks expected to drop which will need protection
+    ArrayList<PendingItemProtection> pendingItemWatchList = new ArrayList<PendingItemProtection>();
+	
 	//configuration variables, loaded/saved from a config.yml
 	
 	//claim mode for each world
@@ -1952,6 +1957,18 @@ public class GriefPrevention extends JavaPlugin
             return true;
 		}
 		
+		//gpblockinfo
+		else if(cmd.getName().equalsIgnoreCase("gpblockinfo") && player != null)
+		{
+		    ItemStack inHand = player.getItemInHand();
+		    player.sendMessage("In Hand: " + String.format("%s(%d:%d)", inHand.getType().name(), inHand.getTypeId(), inHand.getData().getData()));
+		    
+		    Block inWorld = GriefPrevention.getTargetNonAirBlock(player, 300);
+		    player.sendMessage("In World: " + String.format("%s(%d:%d)", inWorld.getType().name(), inWorld.getTypeId(), inWorld.getData()));
+		    
+		    return true;
+		}
+		
 		return false; 
 	}
 	
@@ -2590,6 +2607,16 @@ public class GriefPrevention extends JavaPlugin
 		}		
 	}
 	
-	//this tracks item stacks expected to drop which will need protection
-    ArrayList<PendingItemProtection> pendingItemWatchList = new ArrayList<PendingItemProtection>();
+	private static Block getTargetNonAirBlock(Player player, int maxDistance) throws IllegalStateException
+    {
+        BlockIterator iterator = new BlockIterator(player.getLocation(), player.getEyeHeight(), maxDistance);
+        Block result = player.getLocation().getBlock().getRelative(BlockFace.UP);
+        while (iterator.hasNext())
+        {
+            result = iterator.next();
+            if(result.getType() != Material.AIR) return result;
+        }
+        
+        return result;
+    }
 }

src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java

@@ -781,6 +781,13 @@ class PlayerEventHandler implements Listener
 			}
 		}
 		
+		//FEATURE: when players get trapped in a nether portal, send them back through to the other side
+		if(event.getCause() == TeleportCause.NETHER_PORTAL)
+		{
+		    CheckForPortalTrapTask task = new CheckForPortalTrapTask(player, event.getFrom());
+            GriefPrevention.instance.getServer().getScheduler().scheduleSyncDelayedTask(GriefPrevention.instance, task, 100L);
+		}
+		
 		//FEATURE: prevent teleport abuse to win sieges
 		
 		//these rules only apply to siege worlds only