class LLMS_Notification_Controller_Enrollment extends LLMS_Abstract_Notification_Controller {

	/**
	 * Trigger Identifier
	 *
	 * @var [type]
	 */
	public $id = 'enrollment';

	/**
	 * Number of accepted arguments passed to the callback function
	 *
	 * @var  integer
	 */
	protected $action_accepted_args = 2;

	/**
	 * Action hooks used to trigger sending of the notification
	 *
	 * @var  array
	 */
	protected $action_hooks = array(
		'llms_user_enrolled_in_course',
		'llms_user_added_to_membership_level',
	);

	/**
	 * Callback function, called after enrollment into a course
	 *
	 * @param    int $user_id     WP User ID of the user
	 * @param    int $post_id   WP Post ID of the course or membership
	 * @return   void
	 * @since    3.8.0
	 * @version  3.8.0
	 */
	public function action_callback( $user_id = null, $post_id = null ) {

		$this->user_id = $user_id;
		$this->post_id = $post_id;
		$this->course  = llms_get_post( $post_id );

		$this->send();

	}

	/**
	 * Takes a subscriber type (student, author, etc) and retrieves a User ID
	 *
	 * @param    string $subscriber  subscriber type string
	 * @return   int|false
	 * @since    3.8.0
	 * @version  3.8.0
	 */
	protected function get_subscriber( $subscriber ) {

		switch ( $subscriber ) {

			case 'author':
				$uid = $this->course->get( 'author' );
				break;

			case 'student':
				$uid = $this->user_id;
				break;

			default:
				$uid = false;

		}

		return $uid;

	}

	/**
	 * Get the translatable title for the notification
	 * used on settings screens
	 *
	 * @return   string
	 * @since    3.8.0
	 * @version  3.8.0
	 */
	public function get_title() {
		return __( 'Enrollment', 'lifterlms' );
	}

	/**
	 * Setup the subscriber options for the notification
	 *
	 * @param    string $type  notification type id
	 * @return   array
	 * @since    3.8.0
	 * @version  3.8.0
	 */
	protected function set_subscriber_options( $type ) {

		$options = array();

		switch ( $type ) {

			case 'basic':
				$options[] = $this->get_subscriber_option_array( 'student', 'yes' );
				$options[] = $this->get_subscriber_option_array( 'author', 'no' );
				break;

			case 'email':
				$options[] = $this->get_subscriber_option_array( 'author', 'no' );
				$options[] = $this->get_subscriber_option_array( 'custom', 'no' );
				break;

		}

		return $options;

	}

}