Adds a new configuration option to remove permission signs without a physical sign on startup

README.md

@@ -34,6 +34,8 @@ permanently by another cause, when they expire.
 
 - language - The language used for the plugin (en, nb-no)
 - perWorldPermissions - Sets permissions for the current world instead of setting them globally
+- removePermissionSignIfMissing - If enabled, permission signs that have lost their physical sign will be removed during
+  startup. This prevents permission signs from staying in a broken state until the sign is replaced.
 - enableIndirectSignProtection - Protects permission signs against indirect sources such as pistons and explosions. Only
   disable this if your permission signs are protected by another plugin.
 - enableExtensiveSignProtection - Whether to protect signs on "unstable" blocks such as sand or anvils. Does not protect

src/main/java/net/knarcraft/permissionsigns/PermissionSigns.java

@@ -45,6 +45,7 @@ public final class PermissionSigns extends JavaPlugin {
     private static boolean perWorldPermissions;
     private static boolean enableExtensiveSignProtection;
     private static boolean enableIndirectSignProtection;
+    private static boolean removePermissionSignIfMissing;
 
     /**
      * Instantiates the permission signs class
@@ -141,6 +142,15 @@ public final class PermissionSigns extends JavaPlugin {
         return enableIndirectSignProtection;
     }
 
+    /**
+     * Gets whether to remove permissions signs if their physical signs are missing
+     *
+     * @return <p>Whether tor remove permission signs if their signs are missing</p>
+     */
+    public static boolean removePermissionSignIfMissing() {
+        return removePermissionSignIfMissing;
+    }
+
     @Override
     public void reloadConfig() {
         super.reloadConfig();
@@ -183,6 +193,7 @@ public final class PermissionSigns extends JavaPlugin {
         perWorldPermissions = config.getBoolean("perWorldPermissions", false);
         enableExtensiveSignProtection = config.getBoolean("enableExtensiveSignProtection", false);
         enableIndirectSignProtection = config.getBoolean("enableIndirectSignProtection", true);
+        removePermissionSignIfMissing = config.getBoolean("removePermissionSignIfMissing", true);
         saveConfig();
         return language;
     }

src/main/java/net/knarcraft/permissionsigns/manager/SignManager.java

@@ -114,11 +114,15 @@ public final class SignManager {
      */
     private static void redrawSigns() {
         Bukkit.getScheduler().scheduleSyncDelayedTask(PermissionSigns.getInstance(), () -> {
+            List<Location> invalidPermissionSigns = new ArrayList<>();
             for (Location key : managedSigns.keySet()) {
                 PermissionSign permissionSign = managedSigns.get(key);
                 Block signBlock = key.getBlock();
                 BlockState state = signBlock.getState();
                 if (!(state instanceof Sign sign)) {
+                    if (PermissionSigns.removePermissionSignIfMissing()) {
+                        invalidPermissionSigns.add(permissionSign.getSignLocation());
+                    }
                     continue;
                 }
                 String[] newLines = permissionSign.getSignLines();
@@ -130,6 +134,9 @@ public final class SignManager {
                 }
                 sign.update();
             }
+            for (Location signLocation : invalidPermissionSigns) {
+                SignManager.removeSign(signLocation);
+            }
         });
     }
 

src/main/resources/config.yml

@@ -1,14 +1,18 @@
 # The language to use for the plugin (en, nb-no)
 language: en
 
-# Whether to only give permissions for a single world, instead of granting permissions for all worlds
+# Whether to only give permissions for a single world, instead of granting permissions for all worlds.
 perWorldPermissions: false
 
+# Whether to remove permission signs during loading if the physical sign is missing. This prevents permission signs from
+# existing in a strange state until a new sign is placed in the permission sign's defined location.
+removePermissionSignIfMissing: true
+
 # Whether to enable protection against indirect damage sources such as explosions and pistons. You can disable this to 
 # save some resources if permission signs are only placed in a protected area. WARNING: Disabling this and placing 
-# permission signs in an unprotected area allows unauthorized players to destroy (but not de-register) permission signs
+# permission signs in an unprotected area allows unauthorized players to destroy (but not de-register) permission signs.
 enableIndirectSignProtection: true
 
 # Whether to protect permission signs on falling blocks (sand, gravel, anvil, drip-stone, signs) by preventing breakage 
-# of the blocks that would cause a sign to be destroyed
+# of the blocks that would cause a sign to be destroyed.
 enableExtensiveSignProtection: false