nextcloud / circles

	 * @return null|Member

	 * @throws \Exception

	 */

	public function joinCircle($circleId) {

		try {

			$circle = $this->dbCircles->getDetailsFromCircle($circleId, $this->userId);

			try {

				$member = $this->dbMembers->getMemberFromCircle($circle->getId(), $this->userId);

			} catch (MemberDoesNotExistException $m) {

				$member = new Member($this->userId, $circle->getId());

				$this->dbMembers->add($member);

			}

			$member->hasToBeAbleToJoinTheCircle();

			$member->joinCircle($circle->getType());

			$this->dbMembers->editMember($member);

		} catch (\Exception $e) {

			throw $e;

		}

		return $member;

	}

	/**

	 * @return array

	 * @throws \Exception

	 */

	public function removeMember($circleId, $name) {

		try {

			$isMod = $this->dbMembers->getMemberFromCircle($circleId, $this->userId);

			$isMod->hasToBeModerator();

		} catch (\Exception $e) {

			throw $e;

		}

		try {

			$member = $this->dbMembers->getMemberFromCircle($circleId, $name);

			$member->cantBeOwner();

		} catch (\Exception $e) {

			throw $e;

		}

		$this->dbMembers->remove($member);

		$circle = $this->dbCircles->getDetailsFromCircle($circleId, $this->userId);

		return $this->dbMembers->getMembersFromCircle($circleId, $circle->getUser());

	}

}