feat: enhance error handling with custom HTTP error types

Author: FarhanSaleh

utils/costum_error.go

@@ -1,13 +1,47 @@
 package utils
 
 import (
+	"net/http"
 	"strings"
 
 	"github.com/hammer-code/lms-be/domain"
 )
 
-func CheckError(err, sub, message string, code int) (domain.HttpResponse, bool) {
+type CustomHttpError struct {
+	Code int
+	Message string
+	OriginError error
+}
+
+func (e *CustomHttpError) Error() string {
+	return e.Message
+}
+
+func NewBadRequestError(msg string, err error) *CustomHttpError {
+	return &CustomHttpError{
+		Code:    http.StatusBadRequest,
+		Message: msg,
+		OriginError: err,
+	}
+}
+
+func NewUnauthorizedError(msg string, err error) *CustomHttpError {
+	return &CustomHttpError{
+		Code:    http.StatusUnauthorized,
+		Message: msg,
+		OriginError: err,
+	}
+}
+
+func NewInternalServerError(err error) *CustomHttpError {
+	return &CustomHttpError{
+		Code:    http.StatusInternalServerError,
+		Message: "Internal server error",
+		OriginError: err,
+	}
+}
 
+func CheckError(err, sub, message string, code int) (domain.HttpResponse, bool) {
 	if strings.Contains(err, sub) {
 		return domain.HttpResponse{
 			Code:    code,
@@ -17,25 +51,32 @@ func CheckError(err, sub, message string, code int) (domain.HttpResponse, bool)
 	return domain.HttpResponse{}, false
 }
 
-func CostumErr(err string) domain.HttpResponse {
+func CustomErrorResponse(err error) domain.HttpResponse {
+	if customErr, ok := err.(*CustomHttpError); ok {
+		errStr := customErr.OriginError.Error()
+		resp, ok := CheckError(errStr, "\"uni_users_email\" (SQLSTATE 23505)", "User already exist", 400)
+		if ok {
+			return resp
+		}
 
-	resp, ok := CheckError(err, "\"uni_users_email\" (SQLSTATE 23505)", "User already exist", 400)
-	if ok {
-		return resp
-	}
+		resp, ok = CheckError(errStr, "\"uni_logout_token\" (SQLSTATE 23505)", "You have already logged out.", 400)
+		if ok {
+			return resp
+		}
 
-	resp, ok = CheckError(err, "\"uni_logout_token\" (SQLSTATE 23505)", "You have already logged out.", 400)
-	if ok {
-		return resp
-	}
+		resp, ok = CheckError(errStr, "password", "Sorry, your password is incorrect", 400)
+		if ok {
+			return resp
+		}
 
-	resp, ok = CheckError(err, "password", "Sorry, your password is incorrect", 400)
-	if ok {
-		return resp
+		return domain.HttpResponse{
+			Code:    customErr.Code,
+			Message: customErr.Message,
+		}
 	}
 
 	return domain.HttpResponse{
-		Code:    400,
+		Code:    http.StatusInternalServerError,
 		Message: "Internal server error",
 	}