transfer ranks on rename

src/main/java/me/totalfreedom/tfguilds/command/RenameSubcommand.java

@@ -74,6 +74,7 @@ public class RenameSubcommand extends Common implements CommandExecutor
         guild.disband();
         guild.setIdentifier(GUtil.flatten(newName));
         guild.setName(newName);
+        guild.updateRankIdentifiers();
         sender.sendMessage(tl(PREFIX + "Set %s%" + GUtil.colorize(newName) + "%p% as the new name of your guild%p%."));
         guild.broadcast(tl("%p%Your guild has been renamed to " + GUtil.colorize(newName) + "%p%."));
         guild.save();

src/main/java/me/totalfreedom/tfguilds/guild/Guild.java

@@ -282,6 +282,17 @@ public class Guild
         plugin.guilds.save();
     }
 
+    public void updateRankIdentifiers()
+    {
+        for (GuildRank rank : ranks)
+        {
+            rank.delete();
+            rank.setIguild(identifier);
+            rank.set();
+            plugin.guilds.save();
+        }
+    }
+
     public static Guild createGuild(String identifier, String name, Player owner)
     {
         if (plugin.guilds.contains(identifier))

src/main/java/me/totalfreedom/tfguilds/guild/GuildRank.java

@@ -1,8 +1,8 @@
 package me.totalfreedom.tfguilds.guild;
 
 import lombok.Getter;
+import lombok.Setter;
 import me.totalfreedom.tfguilds.TFGuilds;
-import me.totalfreedom.tfguilds.util.GLog;
 
 import java.util.List;
 
@@ -11,6 +11,7 @@ public class GuildRank
     private static TFGuilds plugin = TFGuilds.getPlugin();
 
     // owning guild's identifier
+    @Setter
     private String iguild;
 
     // identifier