Merge branch 'feature-config-parsing2' into feature-config-usage

# Conflicts:
#	src/engine/powers/EffectsBase.java

src/engine/objects/Building.java

@@ -561,7 +561,7 @@ public class Building extends AbstractWorldObject {
                 BuildingManager.setRank(barracksBuilding, -1);
         }
 
-        // If the tree is R8 and deranking, we need to update it's
+        // If the tree is R8 and deranking, we need to update the
         // mesh along with buildings losing their health bonus
 
         if (this.rank == 8) {

src/engine/objects/City.java

@@ -41,6 +41,7 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 public class City extends AbstractWorldObject {
@@ -80,6 +81,7 @@ public class City extends AbstractWorldObject {
     private String hash;
     public Warehouse warehouse;
     public Realm realm;
+    public AtomicBoolean isDestroyed = new AtomicBoolean(false);
 
     /**
      * ResultSet Constructor
@@ -306,6 +308,21 @@ public class City extends AbstractWorldObject {
             if (city.parentZone == null)
                 continue;
 
+            // Can't teleport to something without a tree
+
+            if (city.getTOL() == null)
+                continue;
+
+            // No abandoned cities
+
+            if (city.getTOL().getGuild().isEmptyGuild())
+                continue;
+
+            // No destroyed cities
+
+            if (city.getTOL().getRank() == -1)
+                continue;
+
             //can't repledge to a guild you're already part of
 
             if (repledge && city.getGuild().equals(playerCharacter.guild))
@@ -1102,17 +1119,21 @@ public class City extends AbstractWorldObject {
 
     public final void destroy() {
 
-        Thread destroyCityThread = new Thread(new DestroyCityThread(this));
+        if (this.isDestroyed.compareAndSet(false, true)) {
 
-        destroyCityThread.setName("destroyCity:" + this.getName());
-        destroyCityThread.start();
+            Thread destroyCityThread = new Thread(new DestroyCityThread(this));
+
+            destroyCityThread.setName("destroyCity:" + this.getParent().zoneName);
+            destroyCityThread.start();
+        } else
+            Logger.error("Attempt to destroy destroyed city");
     }
 
     public final void transfer(AbstractCharacter newOwner) {
 
         Thread transferCityThread = new Thread(new TransferCityThread(this, newOwner));
 
-        transferCityThread.setName("TransferCity:" + this.getName());
+        transferCityThread.setName("TransferCity:" + this.getParent().zoneName);
         transferCityThread.start();
     }
 

src/engine/objects/Mine.java

@@ -220,8 +220,7 @@ public class Mine extends AbstractGameObject {
         // Only inactive mines are returned.
 
         for (Mine mine : Mine.mineMap.keySet()) {
-            if (mine.owningGuild.getObjectUUID() == guildID &&
-                    mine.isActive == false)
+            if (mine.owningGuild.getObjectUUID() == guildID)
                 mineList.add(mine);
         }
         return mineList;