reflections/src/main/java/dev/unlegitdqrk/unlegitlibrary/command/Command.java

package dev.unlegitdqrk.unlegitlibrary.command;

import javax.management.InstanceAlreadyExistsException;
import java.util.ArrayList;
import java.util.List;

public abstract class Command {

    private final CommandManager commandManager;
    private final String name;
    private final String description;
    private final String usage;
    private final List<CommandPermission> permissions;
    private final List<String> aliases;

    public Command(CommandManager commandManager, String name, String description, String usage, List<CommandPermission> permissions, List<String> aliases) throws InstanceAlreadyExistsException {
        this.commandManager = commandManager;
        this.name = name;
        this.description = description;
        this.usage = usage;
        this.permissions = permissions;
        this.aliases = aliases;

        boolean exists = commandManager.getCommand(name) != null;
        if (!exists) for (String alias : aliases) exists = commandManager.getCommand(alias) != null;
        if (exists) throw new InstanceAlreadyExistsException("Command with this name or some alias alreadx exists!");
    }

    public final String getName() {
        return name;
    }

    public final CommandManager getCommandManager() {
        return commandManager;
    }

    public final String getDescription() {
        return description;
    }

    public final String getUsage() {
        return usage;
    }

    public final List<CommandPermission> getPermissions() {
        return new ArrayList<>(permissions);
    }

    public final List<String> getAliases() {
        return new ArrayList<>(aliases);
    }

    public abstract void execute(CommandExecutor commandExecutor, String label, String[] args);
}