Added 'island.name.uniqueness' in the config

Implements https://github.com/BentoBoxWorld/BentoBox/issues/899
Edited IslandsManager#nameExists(...) to strip colors.

src/main/java/world/bentobox/bentobox/Settings.java

@@ -149,6 +149,11 @@ public class Settings implements ConfigObject {
     @ConfigComment("Sets the maximum length an island custom name cannot exceed.")
     @ConfigEntry(path = "island.name.max-length")
     private int nameMaxLength = 20;
+    @ConfigComment("Requires island custom names to be unique in the gamemode the island is in.")
+    @ConfigComment("As a result, only one island per gamemode are allowed to share the same name.")
+    @ConfigComment("Note that island names are purely cosmetics and are not used as a way to programmatically identify islands.")
+    @ConfigEntry(path = "island.name.uniqueness", since = "1.7.0")
+    private boolean nameUniqueness = false;
 
     @ConfigComment("Remove hostile mob on teleport box radius")
     @ConfigComment("If hostile mobs are cleared on player teleport, then this sized box will be cleared")
@@ -395,6 +400,20 @@ public class Settings implements ConfigObject {
         this.nameMaxLength = nameMaxLength;
     }
 
+    /**
+     * @since 1.7.0
+     */
+    public boolean isNameUniqueness() {
+        return nameUniqueness;
+    }
+
+    /**
+     * @since 1.7.0
+     */
+    public void setNameUniqueness(boolean nameUniqueness) {
+        this.nameUniqueness = nameUniqueness;
+    }
+
     /**
      * @param pasteSpeed the pasteSpeed to set
      */

src/main/java/world/bentobox/bentobox/api/commands/island/IslandSetnameCommand.java

@@ -29,22 +29,22 @@ public class IslandSetnameCommand extends CompositeCommand {
 
     @Override
     public boolean execute(User user, String label, List<String> args) {
+        // Explain command
+        if (args.isEmpty()) {
+            showHelp(this, user);
+            return false;
+        }
+
         UUID playerUUID = user.getUniqueId();
 
         if (!getIslands().hasIsland(getWorld(), playerUUID)) {
             user.sendMessage("general.errors.no-island");
             return false;
         }
-
         if (!getIslands().isOwner(getWorld(), playerUUID)) {
             user.sendMessage("general.errors.not-owner");
             return false;
         }
-        // Explain command
-        if (args.isEmpty()) {
-            showHelp(this, user);
-            return false;
-        }
 
         // Naming the island - join all the arguments with spaces.
         String name = String.join(" ", args);
@@ -59,15 +59,20 @@ public class IslandSetnameCommand extends CompositeCommand {
             return false;
         }
 
-        // Set the name
-        if (user.hasPermission(this.getPermissionPrefix() + "island.name.format")) {
-            getIslands().getIsland(getWorld(), playerUUID).setName(ChatColor.translateAlternateColorCodes('&', name));
-        } else {
-            getIslands().getIsland(getWorld(), playerUUID).setName(name);
+        // Apply colors
+        if (user.hasPermission(getPermissionPrefix() + "island.name.format")) {
+            name = ChatColor.translateAlternateColorCodes('&', name);
         }
 
+        // Check if the name doesn't already exist in the gamemode
+        if (getSettings().isNameUniqueness() && getIslands().nameExists(getWorld(), name)) {
+            user.sendMessage("commands.island.setname.name-already-exists");
+            return false;
+        }
+
+        // Everything's good!
+        getIslands().getIsland(getWorld(), playerUUID).setName(name);
         user.sendMessage("general.success");
         return true;
     }
-
 }

src/main/java/world/bentobox/bentobox/managers/IslandsManager.java

@@ -14,6 +14,7 @@ import java.util.UUID;
 import java.util.stream.Collectors;
 
 import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.TreeSpecies;
@@ -1208,6 +1209,7 @@ public class IslandsManager {
      * @since 1.7.0
      */
     public boolean nameExists(@NonNull World world, @NonNull String name) {
-        return getIslands(world).stream().filter(island -> island.getName() != null).map(Island::getName).anyMatch(n -> n.equals(name));
+        return getIslands(world).stream().filter(island -> island.getName() != null).map(Island::getName)
+                .anyMatch(n -> ChatColor.stripColor(n).equals(ChatColor.stripColor(name)));
     }
 }

src/main/resources/locales/en-US.yml

@@ -439,6 +439,7 @@ commands:
       description: "set a name for your island"
       name-too-short: "&cToo short. Minimum size is [number] characters."
       name-too-long: "&cToo long. Maximum size is [number] characters."
+      name-already-exists: "&cThere is already an island with that name in this gamemode."
       parameters: "<name>"
     resetname:
       description: "reset your island name"