BannableFactory.php

<?php
class BannableFactory {
	/**
	 * @param User $user
	 * @return BannableUser
	 */
	public function createBannableUser(User $user) {
		return new BannableUser($user);
	}
}

BannableUser.php

<?php
class BannableUser {
	/** @var User */
	private $user;

	/**
	 * @param User $user
	 */
	public function __construct(User $user) {
		$this->user = $user;
	}

	/**
	 * @return bool
	 */
	public function isBanned() {
		/* ... */
	}

	/**
	 * @return bool
	 */
	public function ban() {
		return $this->setBanStatus(true);
	}

	/**
	 * @return bool
	 */
	public function unban() {
		return $this->setBanStatus(false);
	}

	/**
	 * @param bool $status
	 * @return bool Return true when the status change was successful regardless of the actual status and false if not
	 */
	private function setBanStatus($status) {
		/* ... */
		return $this;
	}
}

BanUserCtrl.php

<?php
class BanUserCtrl {
	/** @var BannableFactory */
	private $factory;

	/**
	 * @param BannableFactory $factory
	 */
	public function __construct(BannableFactory $factory) {
		$this->factory = $factory;
	}

	/**
	 * @param User $user
	 * @return bool
	 */
	public function banUser(User $user) {
		$bannableUser = $this->factory->createBannableUser($user);
		if(!$bannableUser->isBanned()) {
			$success = $bannableUser->ban();
			return $success;
		}
		return false;
	}

	/**
	 * @param User $user
	 * @return bool
	 */
	public function unbanUser(User $user) {
		$bannableUser = $this->factory->createBannableUser($user);
		if($bannableUser->isBanned()) {
			$success = $bannableUser->unban();
			return $success;
		}
		return false;
	}
}

User.php

<?php
class User {
	/** @var int */
	private $id;
	/** @var int */
	private $name;

	/**
	 * @return int
	 */
	public function getId() {
		return $this->id;
	}

	/**
	 * @param int $id
	 * @return $this
	 */
	public function setId($id) {
		$this->id = $id;
		return $this;
	}

	/**
	 * @return int
	 */
	public function getName() {
		return $this->name;
	}

	/**
	 * @param int $name
	 * @return $this
	 */
	public function setName($name) {
		$this->name = $name;
		return $this;
	}
}