command improvements

src/main/java/com/epicplayera10/joinguard/JoinGuard.java

@@ -12,6 +12,7 @@
 import com.google.gson.JsonObject;
 import org.bstats.bukkit.Metrics;
 import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.io.File;
@@ -21,6 +22,7 @@
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
 
 public final class JoinGuard extends JavaPlugin {
     public static final Gson GSON = new Gson();
@@ -70,6 +72,15 @@ private void registerCommands() {
 
         manager.enableUnstableAPI("help");
 
+        manager.getCommandCompletions().registerCompletion("not_whitelisted",
+                c -> Bukkit.getOnlinePlayers().stream()
+                        .map(Player::getName)
+                        .filter(name -> !pluginConfiguration.whitelistedNicks.contains(name))
+                        .collect(Collectors.toList()));
+
+        manager.getCommandCompletions().registerCompletion("whitelist",
+                c -> pluginConfiguration.whitelistedNicks);
+
         manager.registerCommand(new JoinGuardCommand());
     }
 

src/main/java/com/epicplayera10/joinguard/commands/JoinGuardCommand.java

@@ -2,11 +2,7 @@
 
 import co.aikar.commands.BaseCommand;
 import co.aikar.commands.CommandHelp;
-import co.aikar.commands.annotation.CommandAlias;
-import co.aikar.commands.annotation.CommandPermission;
-import co.aikar.commands.annotation.Description;
-import co.aikar.commands.annotation.HelpCommand;
-import co.aikar.commands.annotation.Subcommand;
+import co.aikar.commands.annotation.*;
 import co.aikar.commands.bukkit.contexts.OnlinePlayer;
 import com.epicplayera10.joinguard.JoinGuard;
 import com.epicplayera10.joinguard.utils.ChatUtils;
@@ -22,7 +18,7 @@
 import java.util.Base64;
 import java.util.concurrent.CompletableFuture;
 
-@CommandAlias("joinguard")
+@CommandAlias("joinguard|jg")
 @CommandPermission("joinguard.admin")
 public class JoinGuardCommand extends BaseCommand {
     @HelpCommand
@@ -39,24 +35,40 @@ public void reload(CommandSender sender) {
     }
 
     @Subcommand("whitelist add")
+    @Syntax("<gracz>")
+    @CommandCompletion("@not_whitelisted")
     @Description("Dodaj gracza do whitelisty")
     public void whitelistAdd(CommandSender sender, String playerName) {
+        if (JoinGuard.instance().pluginConfiguration().whitelistedNicks.contains(playerName)){
+            sender.sendMessage(ChatUtils.colorize("&cGracz jest już na whitelistcie"));
+            return;
+        }
         JoinGuard.instance().pluginConfiguration().whitelistedNicks.add(playerName);
         JoinGuard.instance().pluginConfiguration().save();
-        sender.sendMessage("Player added to whitelist!");
+        sender.sendMessage("Dodano " + playerName + " do whitelisty");
     }
 
     @Subcommand("whitelist remove")
+    @Syntax("<gracz>")
+    @CommandCompletion("@whitelist")
     @Description("Usuń gracza z whitelisty")
     public void whitelistRemove(CommandSender sender, String playerName) {
+        if (!JoinGuard.instance().pluginConfiguration().whitelistedNicks.contains(playerName)){
+            sender.sendMessage(ChatUtils.colorize("&cGracza nie ma na whitelistcie"));
+            return;
+        }
         JoinGuard.instance().pluginConfiguration().whitelistedNicks.remove(playerName);
         JoinGuard.instance().pluginConfiguration().save();
-        sender.sendMessage("Player removed from whitelist!");
+        sender.sendMessage("Usunięto " + playerName + " z whitelisty");
     }
 
     @Subcommand("whitelist list")
     @Description("Wyświetl listę graczy na whitelistcie")
     public void whitelistList(CommandSender sender) {
+        if (JoinGuard.instance().pluginConfiguration().whitelistedNicks.isEmpty()){
+            sender.sendMessage("Na whitelistcie nie ma żadnych graczy");
+            return;
+        }
         StringBuilder builder = new StringBuilder();
         boolean first = true;
         for (String nick : JoinGuard.instance().pluginConfiguration().whitelistedNicks) {
@@ -66,7 +78,7 @@ public void whitelistList(CommandSender sender) {
             builder.append(nick);
             first = false;
         }
-        sender.sendMessage("Whitelisted players: " + builder);
+        sender.sendMessage("Gracze na whitelistcie: " + builder);
     }
 
     @Subcommand("login")
@@ -94,6 +106,7 @@ public void login(CommandSender sender) {
     }
 
     @Subcommand("report")
+    @Syntax("<gracz>")
     @Description("Zgłoś gracza")
     public void reportPlayer(Player player, OnlinePlayer reportedPlayer) {
         CompletableFuture.runAsync(() -> {