Fix broken island spot finder

It was working as long as the coordinates in the map were ordered, but since this is not ensured, we need a more complex way of checking for them.

src/main/java/wtf/beatrice/limbomanager/listeners/PlayerTeleporter.java

@@ -32,6 +32,8 @@ import wtf.beatrice.limbomanager.utils.LocationUtils;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.UUID;
 
 public class PlayerTeleporter implements Listener
 {
@@ -76,7 +78,6 @@ public class PlayerTeleporter implements Listener
                         // configure here
                         .build();
                 Operations.complete(operation);
-                editSession.flushSession();
             } catch (WorldEditException e) {
                 throw new RuntimeException(e);
             }
@@ -116,22 +117,40 @@ public class PlayerTeleporter implements Listener
                 islandSpawnLocation.getWorld().getMaxHeight(),
                 islandSpawnLocation.getZ() + maxRange);
 
+        // announce area cleanup
         LimboManager.getInstance().getLogger().info("Player " + playerName + " quit, clearing region...");
 
+        // WorldEdit API integration for faster area cleanup
         World weWorld = BukkitAdapter.adapt(islandSpawnLocation.getWorld());
         try(EditSession editSession = WorldEdit.getInstance().newEditSession(weWorld))
         {
+            // we only need to set everything to air
             BlockState air = BukkitAdapter.adapt(Material.AIR.createBlockData());
 
+            // convert our area borders to WE blockvectors
             BlockVector3 min = BlockVector3.at(startFrom.getBlockX(), startFrom.getBlockY(), startFrom.getBlockZ());
             BlockVector3 max = BlockVector3.at(endAt.getBlockX(), endAt.getBlockY(), endAt.getBlockZ());
+
+            // create a cuboid region
             CuboidRegion cuboidRegion = new CuboidRegion(weWorld, min, max);
+
+            // do the cleaning
             editSession.setBlocks(cuboidRegion, air);
 
+            // set that island spot to "cool-down mode"
+            String randUUID = UUID.randomUUID().toString();
+            Coordinates islandCoords = new Coordinates(Cache.playerIslands.get(playerName));
+            Cache.playerIslands.put(randUUID, islandCoords);
+            Cache.playerIslands.remove(playerName);
+
+            // start a timer to set the spot to free after X time.
             Bukkit.getScheduler().runTaskLater(LimboManager.getInstance(), () -> {
 
-                LimboManager.getInstance().getLogger().info("Region for " + playerName + " is now available again.");
+                LimboManager.getInstance().getLogger().info("Region [" + randUUID + ", "
-                Cache.playerIslands.remove(playerName);
+                        + islandCoords.getX() + ", "
+                        + islandCoords.getZ()
+                        + "] of " + playerName + " is now available again.");
+                Cache.playerIslands.remove(randUUID);
 
             }, 60 * 20L);
 
@@ -150,13 +169,14 @@ public class PlayerTeleporter implements Listener
          */
 
         Coordinates islandCoords = new Coordinates(Cache.baseCoords);
-        for(Coordinates currentCoords : Cache.playerIslands.values()) {
+        ArrayList<Coordinates> playerIslands = new ArrayList<>(Cache.playerIslands.values());
 
-            // if the two are not the same, it means we found a free spot.
+        for(int i = 0; i < playerIslands.size(); i++)
-            // we can thus quit the loop and keep the current coords as valid.
+        {
-            if(!islandCoords.equals(currentCoords)) break;
+            Coordinates checkCoords = playerIslands.get(i);
 
-            // else, if they are the same,
+            if(islandCoords.equals(checkCoords))
+            {
                 // we have to either increase X or move to a new row and reset X, in case it's over 10000.
                 if(islandCoords.getX() >= 10000) // if we need to create a new row
                 {
@@ -165,16 +185,10 @@ public class PlayerTeleporter implements Listener
                 } else { // if we just need to increase the column
                     islandCoords.setX(islandCoords.getX() + Cache.islandsDistance);
                 }
-
+                i = 0; // restart the loop and check again (ugh)
             }
+        } // at the end of the loop, we should have unique coordinates.
 
         return islandCoords;
     }
 }
-
-
-/*
- player joins -> we look for the first free space -> we add it to the list and generate the island
-
-
- */