From e364094a4f4b977480c4ecbea4e0a4d121072017 Mon Sep 17 00:00:00 2001
From: tastybento <tastybento@wasteofplastic.com>
Date: Wed, 15 Jul 2020 18:09:32 -0700
Subject: [PATCH] This stops BentoBox if there is an island distance mismatch.

---
 .../java/world/bentobox/bentobox/BentoBox.java | 18 +++++++++++++++++-
 .../bentobox/managers/IslandsManager.java      | 11 ++++++++++-
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/main/java/world/bentobox/bentobox/BentoBox.java b/src/main/java/world/bentobox/bentobox/BentoBox.java
index c27a7c441..abfebec10 100644
--- a/src/main/java/world/bentobox/bentobox/BentoBox.java
+++ b/src/main/java/world/bentobox/bentobox/BentoBox.java
@@ -1,5 +1,6 @@
 package world.bentobox.bentobox;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
@@ -183,7 +184,22 @@ public class BentoBox extends JavaPlugin {
             registerListeners();
 
             // Load islands from database - need to wait until all the worlds are loaded
-            islandsManager.load();
+            try {
+                islandsManager.load();
+            } catch (Exception e) {
+                logError("*****************CRITIAL ERROR!******************");
+                Arrays.stream(e.getMessage().split("[\n\r]+")).forEach(this::logError);
+                logError("Could not load islands! Disabling BentoBox...");
+                logError("*************************************************");
+                // Stop all addons
+                if (addonsManager != null) {
+                    addonsManager.disableAddons();
+                }
+                // Do not save players or islands, just shutdown
+                shutdown = true;
+                instance.setEnabled(false);
+                return;
+            }
 
             // Save islands & players data every X minutes
             Bukkit.getScheduler().runTaskTimer(instance, () -> {
diff --git a/src/main/java/world/bentobox/bentobox/managers/IslandsManager.java b/src/main/java/world/bentobox/bentobox/managers/IslandsManager.java
index a10ab4f81..33b4dcf5e 100644
--- a/src/main/java/world/bentobox/bentobox/managers/IslandsManager.java
+++ b/src/main/java/world/bentobox/bentobox/managers/IslandsManager.java
@@ -1,5 +1,6 @@
 package world.bentobox.bentobox.managers;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -1037,8 +1038,9 @@ public class IslandsManager {
 
     /**
      * Clear and reload all islands from database
+     * @throws IOException  - if a loaded island distance does not match the expected distance in config.yml
      */
-    public void load() {
+    public void load() throws IOException {
         islandCache.clear();
         quarantineCache.clear();
         List<Island> toQuarantine = new ArrayList<>();
@@ -1050,12 +1052,19 @@ public class IslandsManager {
                 plugin.logWarning("Null island when loading...");
                 continue;
             }
+
             if (island.isDeleted()) {
                 // These will be deleted later
                 deletedIslands.add(island.getUniqueId());
             } else if (island.isDoNotLoad() && island.getWorld() != null && island.getCenter() != null) {
                 // Add to quarantine cache
                 quarantineCache.computeIfAbsent(island.getOwner(), k -> new ArrayList<>()).add(island);
+            } // Check island distance and if incorrect stop BentoBox
+            else if (island.getRange() != plugin.getIWM().getIslandDistance(island.getWorld())) {
+                throw new IOException("Island distance mismatch!\n"
+                        + "World '" + island.getWorld().getName() + "' distance " + plugin.getIWM().getIslandDistance(island.getWorld()) + " != island range " + island.getRange() + "!\n"
+                        + "Island ID in database is " + island.getUniqueId() + ".\n"
+                        + "Island distance in config.yml cannot be changed mid-game! Fix config.yml or clean database.");
             } else {
                 // Fix island center if it is off
                 fixIslandCenter(island);