feat: login service and implement database storage

database/new_db.go

@@ -0,0 +1,43 @@
+package database
+
+import (
+	"fmt"
+	"os"
+
+	staffmodel "github.com/ardeman/project-legalgo-go/database/staff"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+type DB struct {
+	*gorm.DB
+}
+
+func NewDB() (*DB, error) {
+	var (
+		host     = os.Getenv("DB_HOST")
+		user     = os.Getenv("DB_USER")
+		password = os.Getenv("DB_PASSWORD")
+		dbName   = os.Getenv("DB_NAME")
+		dbPort   = os.Getenv("DB_PORT")
+	)
+
+	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%v sslmode=disable", host, user, password, dbName, dbPort)
+
+	if dsn == "" {
+		return nil, fmt.Errorf("DATABASE_URL environment is not set")
+	}
+
+	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to database: %w", err)
+	}
+
+	return &DB{db}, nil
+}
+
+func (db *DB) Migrate() error {
+	// Auto Migrate the User model
+	return db.AutoMigrate(&staffmodel.Staff{})
+}