Fix world caching + block interaction

Fixes #608

src/main/java/com/intellectualcrafters/plot/commands/DebugExec.java

@@ -126,6 +126,7 @@ public class DebugExec extends SubCommand {
         scope.put("Settings", new Settings());
         scope.put("StringMan", new StringMan());
         scope.put("MathMan", new MathMan());
+        scope.put("FlagManager", new FlagManager());
         
         // Classes
         scope.put("Location", Location.class);

src/main/java/com/intellectualcrafters/plot/util/EventUtil.java

@@ -87,14 +87,13 @@ public abstract class EventUtil {
                 if (!plot.hasOwner()) {
                     return Permissions.hasPermission(pp, C.PERMISSION_ADMIN_INTERACT_UNOWNED.s(), notifyPerms);
                 }
-                Flag use = FlagManager.getPlotFlag(plot, "break");
+                Flag use = FlagManager.getPlotFlag(plot, "use");
                 if (use != null) {
                     HashSet<PlotBlock> value = (HashSet<PlotBlock>) use.getValue();
                     if (value.contains(PlotBlock.EVERYTHING) || value.contains(block.getPlotBlock())) {
                         return true;
                     }
                 }
-                
                 Flag destroy = FlagManager.getPlotFlag(plot, "break");
                 if (destroy != null) {
                     HashSet<PlotBlock> value = (HashSet<PlotBlock>) destroy.getValue();

src/main/java/com/intellectualcrafters/plot/util/MainUtil.java

@@ -492,7 +492,6 @@ public class MainUtil {
 
     public static boolean teleportPlayer(final PlotPlayer player, final Location from, final Plot plot) {
         final Plot bot = MainUtil.getBottomPlot(plot);
-
         boolean result = EventUtil.manager.callTeleport(player, from, plot);
 
         if (result) {

src/main/java/com/intellectualcrafters/plot/util/StringMan.java

@@ -242,11 +242,11 @@ public class StringMan {
     }
     
     public static boolean isEqual(String a, String b) {
-        return (a == b || (a.length() == b.length() && a.hashCode() == b.hashCode() && a.equals(b)));
+        return (a == b || (a != null && b != null && a.length() == b.length() && a.hashCode() == b.hashCode() && a.equals(b)));
     }
     
     public static boolean isEqualIgnoreCase(String a, String b) {
-        return (a == b || (a.length() == b.length() && a.equalsIgnoreCase(b)));
+        return (a == b || (a != null && b != null && a.length() == b.length() && a.equalsIgnoreCase(b)));
     }
 
     public static String repeat(String s, int n) {

src/main/java/com/plotsquared/bukkit/listeners/PlayerEvents.java

@@ -1096,6 +1096,7 @@ public class PlayerEvents extends com.plotsquared.listener.PlotListener implemen
                     case BEACON:
                     case BED_BLOCK:
                     case SIGN:
+                    case WALL_SIGN:
                     case SIGN_POST:
                     case ENCHANTMENT_TABLE:
                     case BREWING_STAND:
@@ -1125,7 +1126,7 @@ public class PlayerEvents extends com.plotsquared.listener.PlotListener implemen
                 if (eventType != null && !player.isSneaking()) {
                     break;
                 }
-                if (hand == null) {
+                if (hand == null || hand.getType() == Material.AIR || hand.getType().isBlock()) {
                     eventType = PlayerBlockEventType.INTERACT_BLOCK;
                     lb = new BukkitLazyBlock(block);
                     break;

src/main/java/com/plotsquared/bukkit/object/BukkitPlayer.java

@@ -8,6 +8,7 @@ import org.bukkit.Effect;
 import org.bukkit.GameMode;
 import org.bukkit.WeatherType;
 import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
 import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionDefault;
 import org.bukkit.plugin.PluginManager;
@@ -130,7 +131,7 @@ public class BukkitPlayer extends PlotPlayer {
         if (Math.abs(loc.getX()) >= 30000000 || Math.abs(loc.getZ()) >= 30000000) {
             return;
         }
-        this.player.teleport(new org.bukkit.Location(BukkitUtil.getWorld(loc.getWorld()), loc.getX() + 0.5, loc.getY(), loc.getZ() + 0.5, loc.getYaw(), loc.getPitch()));
+            this.player.teleport(new org.bukkit.Location(BukkitUtil.getWorld(loc.getWorld()), loc.getX() + 0.5, loc.getY(), loc.getZ() + 0.5, loc.getYaw(), loc.getPitch()), TeleportCause.COMMAND);
     }
     
     @Override

src/main/java/com/plotsquared/bukkit/util/BukkitUtil.java

@@ -31,11 +31,11 @@ import com.intellectualcrafters.plot.object.schematic.PlotItem;
 import com.intellectualcrafters.plot.util.BlockManager;
 import com.intellectualcrafters.plot.util.MathMan;
 import com.intellectualcrafters.plot.util.StringComparison;
+import com.intellectualcrafters.plot.util.StringMan;
 import com.intellectualcrafters.plot.util.UUIDHandler;
 import com.plotsquared.bukkit.object.BukkitPlayer;
 
 public class BukkitUtil extends BlockManager {
-    private static HashMap<String, World> worlds = new HashMap<>();
     private static String lastString = null;
     private static World lastWorld = null;
 
@@ -145,14 +145,12 @@ public class BukkitUtil extends BlockManager {
     }
 
     public static World getWorld(final String string) {
-        if (string == lastString) {
+        if (StringMan.isEqual(string,lastString)) {
             return lastWorld;
         }
-        World world = worlds.get(string);
-        if (world == null) {
-            world = Bukkit.getWorld(string);
-            worlds.put(string, world);
-        }
+        World world = Bukkit.getWorld(string);
+        lastString = string;
+        lastWorld = world;
         return world;
     }