perf: optimize Login GORM query with select-specific-columns, specific preloads, and remove the redundant First(company) query

controllers/auth_controller.go

@@ -14,6 +14,7 @@ import (
 	"service-warungpos-go/services"
 
 	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
 )
 
 // SeedDefaultAdmin inisialisasi default super admin jika belum ada
@@ -142,7 +143,15 @@ func Login(c *gin.Context) {
 	}
 
 	var user models.User
-	if err := config.DB.Preload("Company").Preload("Branch").Where("email = ?", req.Email).First(&user).Error; err != nil {
+	if err := config.DB.Select("id, name, email, password, phone, role, company_id, branch_id, is_active, created_at").
+		Preload("Company", func(db *gorm.DB) *gorm.DB {
+			return db.Select("id, name, approved_at, is_active")
+		}).
+		Preload("Branch", func(db *gorm.DB) *gorm.DB {
+			return db.Select("id, name")
+		}).
+		Where("email = ?", req.Email).
+		First(&user).Error; err != nil {
 		c.JSON(http.StatusUnauthorized, gin.H{"detail": "Email atau password salah"})
 		return
 	}
@@ -154,18 +163,15 @@ func Login(c *gin.Context) {
 
 	// Cek status keaktifan user
 	if !user.IsActive {
-		if user.Role == "owner" && user.CompanyID != nil {
-			var company models.Company
-			if err := config.DB.First(&company, *user.CompanyID).Error; err == nil {
-				if company.ApprovedAt != nil {
-					// Pernah diapprove tapi sekarang dinonaktifkan
-					c.JSON(http.StatusUnauthorized, gin.H{"detail": "ACCOUNT_DEACTIVATED"})
-					return
-				} else {
-					// Belum diapprove super_admin
-					c.JSON(http.StatusUnauthorized, gin.H{"detail": "PENDING_APPROVAL"})
-					return
-				}
+		if user.Role == "owner" && user.Company != nil {
+			if user.Company.ApprovedAt != nil {
+				// Pernah diapprove tapi sekarang dinonaktifkan
+				c.JSON(http.StatusUnauthorized, gin.H{"detail": "ACCOUNT_DEACTIVATED"})
+				return
+			} else {
+				// Belum diapprove super_admin
+				c.JSON(http.StatusUnauthorized, gin.H{"detail": "PENDING_APPROVAL"})
+				return
 			}
 		}
 		c.JSON(http.StatusForbidden, gin.H{"detail": "Akun tidak aktif, hubungi admin"})