public static function register_post_statuses() {

		// Closed
		register_post_status(
			bbp_get_closed_status_id(),
			apply_filters( 'bbp_register_closed_post_status', array(
				'label'                     => _x( 'Closed', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Closed <span class="count">(%s)</span>', 'Closed <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'public'                    => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => true,
				'source'                    => 'bbpress'
			) )
		);

		// Spam
		register_post_status(
			bbp_get_spam_status_id(),
			apply_filters( 'bbp_register_spam_post_status', array(
				'label'                     => _x( 'Spam', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Spam <span class="count">(%s)</span>', 'Spam <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'protected'                 => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => false,
				'source'                    => 'bbpress'
			) )
		);

		// Orphan
		register_post_status(
			bbp_get_orphan_status_id(),
			apply_filters( 'bbp_register_orphan_post_status', array(
				'label'                     => _x( 'Orphan', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Orphan <span class="count">(%s)</span>', 'Orphans <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'protected'                 => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => false,
				'source'                    => 'bbpress'
			) )
		);

		// Hidden
		register_post_status(
			bbp_get_hidden_status_id(),
			apply_filters( 'bbp_register_hidden_post_status', array(
				'label'                     => _x( 'Hidden', 'post', 'bbpress' ),
				'label_count'               => _nx_noop( 'Hidden <span class="count">(%s)</span>', 'Hidden <span class="count">(%s)</span>', 'post', 'bbpress' ),
				'private'                   => true,
				'exclude_from_search'       => true,
				'show_in_admin_status_list' => true,
				'show_in_admin_all_list'    => true,
				'source'                    => 'bbpress'
			) )
		);

		/**
		 * Trash fix
		 *
		 * We need to remove the internal arg and change that to
		 * protected so that the users with 'view_trash' cap can view
		 * single trashed topics/replies in the front-end as wp_query
		 * doesn't allow any hack for the trashed topics to be viewed.
		 */
		global $wp_post_statuses;

		if ( ! empty( $wp_post_statuses['trash'] ) ) {

			// User can view trash so set internal to false
			if ( current_user_can( 'view_trash' ) ) {
				$wp_post_statuses['trash']->internal  = false;
				$wp_post_statuses['trash']->protected = true;

			// User cannot view trash so set internal to true
			} else {
				$wp_post_statuses['trash']->internal = true;
			}
		}
	}