impl tab completion on player color command

src/main/java/cc/fascinated/account/Profile.java

@@ -1,5 +1,6 @@
 package cc.fascinated.account;
 
+import cc.fascinated.command.Command;
 import cc.fascinated.utils.Manager;
 import lombok.Getter;
 import org.bukkit.configuration.ConfigurationSection;
@@ -12,6 +13,11 @@ public abstract class Profile extends Manager {
      */
     private final Account account;
 
+    /**
+     * The configuration section for this profile.
+     */
+    private final ConfigurationSection section;
+
     /**
      * This constructor is used for loading a profile from file.
      *
@@ -20,6 +26,7 @@ public abstract class Profile extends Manager {
      */
     public Profile(Account account, ConfigurationSection section) {
         this.account = account;
+        this.section = section;
     }
 
     /**

src/main/java/cc/fascinated/command/Command.java

@@ -5,11 +5,15 @@ import cc.fascinated.account.AccountManager;
 import lombok.Getter;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
 
 @Getter
-public abstract class Command implements CommandExecutor {
+public abstract class Command implements CommandExecutor, TabCompleter {
 
     /**
      * The command name
@@ -30,6 +34,25 @@ public abstract class Command implements CommandExecutor {
         this.command = command;
     }
 
+    /**
+     * Executes the command.
+     *
+     * @param account The account executing the command.
+     * @param args The arguments of the command.
+     */
+    public abstract void execute(Account account, String[] args);
+
+    /**
+     * Tab completes the command.
+     *
+     * @param account The account executing the command.
+     * @param args The arguments of the command.
+     * @return The tab completions.
+     */
+    public List<String> tabComplete(Account account, String[] args) {
+        return null;
+    }
+
     @Override
     public boolean onCommand(@NotNull CommandSender commandSender, org.bukkit.command.@NotNull Command command, @NotNull String s, @NotNull String[] strings) {
         if (this.permission != null && !commandSender.hasPermission(permission)) {
@@ -43,11 +66,14 @@ public abstract class Command implements CommandExecutor {
         return true;
     }
 
-    /**
-     * Executes the command.
-     *
-     * @param account The account executing the command.
-     * @param args The arguments of the command.
-     */
-    public abstract void execute(Account account, String[] args);
+    @Override
+    public @Nullable List<String> onTabComplete(@NotNull CommandSender commandSender, org.bukkit.command.@NotNull Command command, @NotNull String s, @NotNull String[] strings) {
+        if (this.permission != null && !commandSender.hasPermission(permission)) {
+            return null;
+        }
+
+        Player player = (Player) commandSender;
+        Account account = AccountManager.getAccount(player.getUniqueId());
+        return this.tabComplete(account, strings);
+    }
 }

src/main/java/cc/fascinated/command/CommandManager.java

@@ -24,5 +24,6 @@ public class CommandManager {
             throw new IllegalArgumentException("Command " + command.getCommand() + " does not exist.");
         }
         pluginCommand.setExecutor(command);
+        pluginCommand.setTabCompleter(command);
     }
 }

src/main/java/cc/fascinated/playercolor/command/PlayerColorCommand.java

@@ -7,6 +7,7 @@ import cc.fascinated.playercolor.PlayerColorManager;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class PlayerColorCommand extends Command {
@@ -46,4 +47,16 @@ public class PlayerColorCommand extends Command {
         playerColorProfile.setColor(color);
         account.sendMessage(Component.text("§b§lPLAYERCOLOR §7» §fYour color has been set to: ").append(Component.text(playerColorProfile.getColor().toString()).color(playerColorProfile.getColor())));
     }
+
+    @Override
+    public List<String> tabComplete(Account account, String[] args) {
+        List<NamedTextColor> colors = PlayerColorManager.getValidColors();
+
+        if (args.length == 1) {
+            List<String> list = new ArrayList<>(colors.stream().map(NamedTextColor::toString).toList());
+            list.add("random");
+            return list;
+        }
+        return null;
+    }
 }