Add tab completion to ArenaCommand

src/de/steamwar/bungeecore/commands/ArenaCommand.java

@@ -22,11 +22,16 @@ package de.steamwar.bungeecore.commands;
 import de.steamwar.bungeecore.Servertype;
 import de.steamwar.bungeecore.Subserver;
 import de.steamwar.command.SWCommand;
+import de.steamwar.command.TypeMapper;
 import de.steamwar.messages.ChatSender;
+import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.config.ServerInfo;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 
+import java.util.Collection;
+import java.util.stream.Collectors;
+
 public class ArenaCommand extends SWCommand {
 
     public ArenaCommand() {
@@ -34,8 +39,7 @@ public class ArenaCommand extends SWCommand {
     }
 
     @Register
-    public void arenaJoin(ProxiedPlayer player, String... serverInfo) {
-        ServerInfo server = ProxyServer.getInstance().getServerInfo(String.join(" ", serverInfo));
+    public void arenaJoin(ProxiedPlayer player, ServerInfo server) {
         Subserver subserver = Subserver.getSubserver(server);
         if(server == null || subserver == null || subserver.getType() != Servertype.ARENA) {
             ChatSender.of(player).system("ARENA_NOT_FOUND");
@@ -44,4 +48,22 @@ public class ArenaCommand extends SWCommand {
 
         TpCommand.teleport(player, server);
     }
+
+    @ClassMapper(ServerInfo.class)
+    public TypeMapper<ServerInfo> serverInfoTypeMapper() {
+        return new TypeMapper<ServerInfo>() {
+            @Override
+            public ServerInfo map(CommandSender commandSender, String[] previousArguments, String s) {
+                return ProxyServer.getInstance().getServerInfo(s);
+            }
+
+            @Override
+            public Collection<String> tabCompletes(CommandSender sender, String[] previousArguments, String s) {
+                return ProxyServer.getInstance().getServersCopy().values().stream().filter(server -> {
+                    Subserver subserver = Subserver.getSubserver(server);
+                    return subserver != null && subserver.getType() == Servertype.ARENA;
+                }).map(ServerInfo::getName).collect(Collectors.toList());
+            }
+        };
+    }
 }