add CommandManager

src/main/java/ghast/command/CommandExecuter.java

@@ -0,0 +1,8 @@
+package ghast.command;
+
+import org.bukkit.command.CommandSender;
+
+public interface CommandExecuter {
+
+	void execute(CommandSender sender, String[] args);
+}

src/main/java/ghast/command/CommandManager.java

@@ -0,0 +1,67 @@
+package ghast.command;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import ru.dmitriymx.reflection.ReflectionObject;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class CommandManager {
+
+	public Builder create(String name) {
+		return new Builder(name);
+	}
+
+	@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
+	public static class Builder {
+
+		private final String name;
+		private CommandExecuter executer;
+		private ErrorConsumer errorConsumer;
+		private Boolean onlyPlayer;
+		private String deniedMessage;
+
+		public Builder executer(CommandExecuter executer) {
+			this.executer = executer;
+			return this;
+		}
+
+		public Builder onError(ErrorConsumer errorConsumer) {
+			this.errorConsumer = errorConsumer;
+			return this;
+		}
+
+		public Builder useOnlyPlayer(String deniedMessage) {
+			this.onlyPlayer = true;
+			this.deniedMessage = deniedMessage;
+			return this;
+		}
+
+		public Builder useOnlyPlayer() {
+			return useOnlyPlayer(null);
+		}
+
+		public Builder useOnlyConsole(String deniedMessage) {
+			this.onlyPlayer = false;
+			this.deniedMessage = deniedMessage;
+			return this;
+		}
+
+		public Builder useOnlyConsole() {
+			return useOnlyConsole(null);
+		}
+
+		public void register() {
+			//TODO для Paper такие "извращения" не требуются. Нужно продумать.
+			new ReflectionObject(Bukkit.getServer())
+					.method("getCommandMap").invoke()
+					.method("register", String.class, Command.class).invoke(
+						name, new CommandWrapper(name, this.onlyPlayer, this.deniedMessage,
+							this.executer, this.errorConsumer)
+					);
+		}
+	}
+}

src/main/java/ghast/command/CommandWrapper.java

@@ -0,0 +1,71 @@
+package ghast.command;
+
+import ghast.XLog;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.defaults.BukkitCommand;
+import org.bukkit.entity.Player;
+
+class CommandWrapper extends BukkitCommand {
+
+	private static final String DEFAULT_DENIED_MESSAGE_PLAYERS = ChatColor.RED + "This command use only players";
+	private static final String DEFAULT_DENIED_MESSAGE_CONSOLE = ChatColor.RED + "This command use only in console";
+
+	private static final ErrorConsumer DEFAULT_ERROR_CONSUMER =
+			(sender, commandName, args, exception) -> {
+				sender.sendMessage(String.format("%sError execute command '%s'!", ChatColor.RED, commandName));
+				XLog.error("Error execute command ''{0}'' with args ''{1}''",
+						commandName, String.join(" ", args), exception);
+			};
+
+	private final CommandExecuter executer;
+	private final ErrorConsumer errorConsumer;
+	private final Boolean onlyPlayer;
+	private String deniedMessage;
+
+	protected CommandWrapper(String name, Boolean onlyPlayer, String deniedMessage,
+			CommandExecuter executer, ErrorConsumer errorConsumer) {
+		super(name);
+		this.onlyPlayer = onlyPlayer;
+		this.executer = executer;
+
+		if (onlyPlayer != null) {
+			if (deniedMessage == null) {
+				this.deniedMessage = Boolean.TRUE.equals(onlyPlayer) ? DEFAULT_DENIED_MESSAGE_PLAYERS
+						: DEFAULT_DENIED_MESSAGE_CONSOLE;
+			} else {
+				this.deniedMessage = deniedMessage;
+			}
+		}
+
+		if(errorConsumer == null) {
+			this.errorConsumer = DEFAULT_ERROR_CONSUMER;
+		} else {
+			this.errorConsumer = errorConsumer;
+		}
+	}
+
+	@Override
+	@SuppressWarnings("java:S1066")
+	public boolean execute(CommandSender commandSender, String commandName, String[] args) {
+		if (Boolean.TRUE.equals(onlyPlayer)) {
+			if (!(commandSender instanceof Player)) {
+				commandSender.sendMessage(deniedMessage);
+				return true;
+			}
+		} else if (Boolean.FALSE.equals(onlyPlayer)) { // use console only
+			if (commandSender instanceof Player) {
+				commandSender.sendMessage(deniedMessage);
+				return true;
+			}
+		}
+
+		try {
+			executer.execute(commandSender, args);
+			return true;
+		} catch (Exception e) {
+			errorConsumer.accept(commandSender, commandName, args, e);
+			return false;
+		}
+	}
+}

src/main/java/ghast/command/ErrorConsumer.java

@@ -0,0 +1,8 @@
+package ghast.command;
+
+import org.bukkit.command.CommandSender;
+
+public interface ErrorConsumer {
+
+	void accept(CommandSender sender, String commandName, String[] args, Exception exception);
+}