first

backend/internal/platform/db/db.go

@@ -0,0 +1,34 @@
+// Package db provides the PostgreSQL connection via GORM.
+package db
+
+import (
+	"fmt"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	gormlogger "gorm.io/gorm/logger"
+)
+
+func Connect(databaseURL string, debug bool) (*gorm.DB, error) {
+	logLevel := gormlogger.Silent
+	if debug {
+		logLevel = gormlogger.Warn
+	}
+
+	db, err := gorm.Open(postgres.Open(databaseURL), &gorm.Config{
+		Logger: gormlogger.Default.LogMode(logLevel),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("connect postgres: %w", err)
+	}
+
+	sqlDB, err := db.DB()
+	if err != nil {
+		return nil, fmt.Errorf("get sql.DB: %w", err)
+	}
+	if err := sqlDB.Ping(); err != nil {
+		return nil, fmt.Errorf("ping postgres: %w", err)
+	}
+
+	return db, nil
+}