res_levis_backend/internal/pkg/database/database.go

package database

import (
	"fmt"

	"github.com/AFASystems/presence/internal/pkg/config"
	"github.com/AFASystems/presence/internal/pkg/model"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
)

var DB *gorm.DB

func Connect(cfg *config.Config) (*gorm.DB, error) {
	// Connect to PostgreSQL database
	dsn := fmt.Sprintf(
		"host=%s user=%s password=%s dbname=%s port=5432 sslmode=disable",
		cfg.DBHost,
		cfg.DBUser,
		cfg.DBPass,
		cfg.DBName,
	)

	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
	if err != nil {
		return nil, err
	}

	if err := db.AutoMigrate(&model.Gateway{}, model.Zone{}, model.TrackerZones{}); err != nil {
		return nil, err
	}

	fmt.Println("Database connection established")
	return db, nil
}