Submission_Manager::maybe_clean_count_cache( object|null $new_db_object, object|null $old_db_object )

	protected function maybe_clean_count_cache( $new_db_object, $old_db_object ) {
		$delete_user_count = false;
		$delete_form_count = false;

		if ( null === $new_db_object || null === $old_db_object || $new_db_object->status !== $old_db_object->status ) {
			$this->cache()->delete( $this->plural_slug, 'counts' );

			$delete_user_count = true;
			$delete_form_count = true;
		} elseif ( null !== $new_db_object && null !== $old_db_object ) {
			if ( $new_db_object->user_id !== $old_db_object->user_id ) {
				$delete_user_count = true;
			}
			if ( $new_db_object->form_id !== $old_db_object->form_id ) {
				$delete_form_count = true;
			}
		}

		$user_ids = array();
		if ( $delete_user_count ) {
			if ( null !== $new_db_object ) {
				$user_ids[] = absint( $new_db_object->user_id );
			}
			if ( null !== $old_db_object && ! in_array( absint( $old_db_object->user_id ), $user_ids, true ) ) {
				$user_ids[] = absint( $old_db_object->user_id );
			}
		}

		$form_ids = array();
		if ( $delete_form_count ) {
			if ( null !== $new_db_object ) {
				$form_ids[] = absint( $new_db_object->form_id );
			}
			if ( null !== $old_db_object && ! in_array( absint( $old_db_object->form_id ), $form_ids, true ) ) {
				$form_ids[] = absint( $old_db_object->form_id );
			}
		}

		$extra_delete_keys = array();
		foreach ( $user_ids as $user_id ) {
			$extra_delete_keys[] = $this->plural_slug . '-' . $user_id;

			foreach ( $form_ids as $form_id ) {
				$extra_delete_keys[] = $this->plural_slug . '-' . $user_id . '-' . $form_id;
			}
		}
		foreach ( $form_ids as $form_id ) {
			$extra_delete_keys[] = $this->plural_slug . '-' . $form_id;
		}

		foreach ( $extra_delete_keys as $extra_delete_key ) {
			$this->cache()->delete( $extra_delete_key, 'counts' );
		}
	}