res_levis_backend/internal/app/server/healthcheck.go

package server

import (
	"context"
	"strings"
	"time"

	"github.com/AFASystems/presence/internal/pkg/common/appcontext"
	"github.com/segmentio/kafka-go"
	"gorm.io/gorm"
)

const healthCheckTimeout = 3 * time.Second

// CheckKafkaHealth dials the broker and returns ServiceStatus. Uses first broker from kafkaURL (comma-separated).
func CheckKafkaHealth(ctx context.Context, kafkaURL string) appcontext.ServiceStatus {
	if kafkaURL == "" {
		return appcontext.ServiceStatus{Status: "down", Message: "no broker URL"}
	}
	broker := strings.TrimSpace(strings.Split(kafkaURL, ",")[0])
	tctx, cancel := context.WithTimeout(ctx, healthCheckTimeout)
	defer cancel()
	dialer := &kafka.Dialer{Timeout: healthCheckTimeout}
	conn, err := dialer.DialContext(tctx, "tcp", broker)
	if err != nil {
		return appcontext.ServiceStatus{Status: "down", Message: err.Error()}
	}
	_ = conn.Close()
	return appcontext.ServiceStatus{Status: "up"}
}

// CheckDBHealth pings the database and returns ServiceStatus.
func CheckDBHealth(ctx context.Context, db *gorm.DB) appcontext.ServiceStatus {
	sqlDB, err := db.DB()
	if err != nil {
		return appcontext.ServiceStatus{Status: "down", Message: err.Error()}
	}
	tctx, cancel := context.WithTimeout(ctx, healthCheckTimeout)
	defer cancel()
	if err := sqlDB.PingContext(tctx); err != nil {
		return appcontext.ServiceStatus{Status: "down", Message: err.Error()}
	}
	return appcontext.ServiceStatus{Status: "up"}
}