AP_Update_Helper::migrate_votes( integer $post_id )

	public function migrate_votes( $post_id ) {
		global $wpdb;

		if ( ! $this->meta_table_exists ) {
			return;
		}

		$post_id = (int) $post_id;
		$old_votes = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}ap_meta WHERE apmeta_type IN ('vote_up', 'vote_down') AND apmeta_actionid = {$post_id}" ); // @codingStandardsIgnoreLine

		$apmeta_to_delete = [];
		foreach ( (array) $old_votes as $vote ) {
			ap_add_post_vote( $post_id, $vote->apmeta_userid, 'vote_up' === $vote->apmeta_type, $vote->apmeta_value );
			$apmeta_to_delete[] = $vote->apmeta_id;

			// Delete post meta.
			delete_post_meta( $post_id, '_ap_vote' );
		}

		// Delete all migrated data.
		$apmeta_to_delete = sanitize_comma_delimited( $apmeta_to_delete, 'int' );
		$wpdb->query( "DELETE FROM {$wpdb->prefix}ap_meta WHERE apmeta_id IN ({$apmeta_to_delete})" ); // @codingStandardsIgnoreLine
	}