Added errors for services

docs/swagger.yaml

@@ -194,6 +194,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Delete post
       tags:
       - post
@@ -218,6 +226,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Get post by id
       tags:
       - post
@@ -246,6 +262,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Update post content
       tags:
       - post
@@ -271,6 +295,10 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Get posts after offset
       tags:
       - post
@@ -290,6 +318,10 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Get all users
       tags:
       - user
@@ -315,6 +347,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "409":
+          description: Conflict
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Create new user
       tags:
       - user
@@ -336,6 +376,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Delete user
       tags:
       - user
@@ -360,6 +408,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Find user by id
       tags:
       - user
@@ -390,6 +446,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Change user
       tags:
       - user
@@ -415,6 +479,14 @@ paths:
           description: Bad Request
           schema:
             $ref: '#/definitions/responses.ErrorResponse'
+        "404":
+          description: Not Found
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/responses.ErrorResponse'
       summary: Find user by username
       tags:
       - user

internal/application/errors/already_exists_error.go

@@ -0,0 +1,15 @@
+package errors
+
+type AlreadyExistsError struct {
+	msg string
+}
+
+func NewAlreadyExistsError(msg string) *AlreadyExistsError {
+	return &AlreadyExistsError{
+		msg: msg,
+	}
+}
+
+func (e *AlreadyExistsError) Error() string {
+	return "Already exists: " + e.msg
+}

internal/application/errors/db_error.go

@@ -4,12 +4,12 @@ type DBError struct {
 	msg string
 }
 
-func NewDBError(msg string) DBError {
+func NewDBError(msg string) *DBError {
-	return DBError{
+	return &DBError{
 		msg: msg,
 	}
 }
 
 func (e *DBError) Error() string {
-	return e.msg
+	return "Database error:" + e.msg
 }

internal/application/errors/not_found_error.go

@@ -11,5 +11,5 @@ func NewNotFoundError(msg string) *NotFoundError {
 }
 
 func (e *NotFoundError) Error() string {
-	return e.msg
+	return "Not found error: " + e.msg
 }

internal/application/errors/validation_error.go

@@ -0,0 +1,15 @@
+package errors
+
+type ValidationError struct {
+	msg string
+}
+
+func NewValidationError(msg string) *ValidationError {
+	return &ValidationError{
+		msg: msg,
+	}
+}
+
+func (e *ValidationError) Error() string {
+	return "Validation error: " + e.msg
+}

internal/application/services/post_service.go

@@ -3,13 +3,11 @@ package services
 import (
 	"58team_blog/internal/application/commands"
 	"58team_blog/internal/application/common"
-	ie "58team_blog/internal/application/errors"
+	"58team_blog/internal/application/errors"
 	"58team_blog/internal/application/mapper"
 	"58team_blog/internal/application/queries"
 	"58team_blog/internal/domain/entities"
 	"58team_blog/internal/domain/repository"
-	"errors"
-	"fmt"
 	"time"
 )
 
@@ -26,12 +24,12 @@ func CreatePostService(repo repository.PostRepository) PostService {
 func (s *PostService) Create(cmd commands.CreatePostCommand) (*common.PostResult, error) {
 	entity, err := entities.CreatePost(cmd.UserId, cmd.Title, cmd.Description, cmd.Content)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewValidationError("Invalid input data " + err.Error())
 	}
 
 	post, err := s.repo.Create(&entity)
 	if err != nil {
-		return nil, fmt.Errorf("Db error: %s", err)
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	result := mapper.CreatePostResultFromEntity(post)
@@ -42,15 +40,15 @@ func (s *PostService) Create(cmd commands.CreatePostCommand) (*common.PostResult
 func (s *PostService) FindById(query queries.PostFindByIdQuery) (*queries.PostFindByIdResult, error) {
 	post, err := s.repo.FindById(query.Id)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	if post == nil {
-		return nil, ie.NewNotFoundError("Post")
+		return nil, errors.NewNotFoundError("Post")
 	}
 
 	if err := post.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	result := mapper.CreatePostFindByIdResultFromEntity(*post)
@@ -61,12 +59,12 @@ func (s *PostService) FindById(query queries.PostFindByIdQuery) (*queries.PostFi
 func (s *PostService) FindAllByUserName(query queries.PostFindAllByUserNameQuery) (*queries.PostFindAllByUserNameResult, error) {
 	posts, err := s.repo.FindAllByUserName(query.UserName)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	for _, p := range posts {
 		if err := p.Validate(); err != nil {
-			return nil, err
+			return nil, errors.NewValidationError(err.Error())
 		}
 	}
 
@@ -78,12 +76,12 @@ func (s *PostService) FindAllByUserName(query queries.PostFindAllByUserNameQuery
 func (s *PostService) GetAll() (*queries.PostGetAllResult, error) {
 	posts, err := s.repo.GetAll()
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	for _, p := range posts {
 		if err := p.Validate(); err != nil {
-			return nil, err
+			return nil, errors.NewValidationError(err.Error())
 		}
 	}
 
@@ -94,13 +92,12 @@ func (s *PostService) GetAll() (*queries.PostGetAllResult, error) {
 
 func (s *PostService) GetAllOffset(offset int) (*queries.PostGetAllResult, error) {
 	if offset < 0 {
-		return nil, errors.New("offset is less than 0")
+		return nil, errors.NewValidationError("offset is less than 0")
 	}
 
 	posts, err := s.repo.GetAllOffset(offset)
-
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	result := mapper.CreatePostGetAllResult(posts)
@@ -111,11 +108,11 @@ func (s *PostService) GetAllOffset(offset int) (*queries.PostGetAllResult, error
 func (s *PostService) Update(cmd commands.UpdatePostCommand) (*common.PostResult, error) {
 	post, err := s.repo.FindById(cmd.Id)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	if err := post.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	post.Title = cmd.Title
@@ -124,7 +121,7 @@ func (s *PostService) Update(cmd commands.UpdatePostCommand) (*common.PostResult
 	post.UpdatedAt = time.Now()
 
 	if err := post.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	result := mapper.CreatePostResultFromEntity(post)
@@ -135,16 +132,16 @@ func (s *PostService) Update(cmd commands.UpdatePostCommand) (*common.PostResult
 func (s *PostService) Delete(cmd commands.DeletePostCommand) error {
 	post, err := s.repo.FindById(cmd.Id)
 	if err != nil {
-		return err
+		return errors.NewDBError(err.Error())
 	}
 
 	if err := post.Validate(); err != nil {
-		return err
+		return errors.NewValidationError(err.Error())
 	}
 
 	err = s.repo.Delete(cmd.Id)
 	if err != nil {
-		return err
+		return errors.NewDBError(err.Error())
 	}
 
 	return nil

internal/application/services/user_service.go

@@ -3,12 +3,11 @@ package services
 import (
 	"58team_blog/internal/application/commands"
 	"58team_blog/internal/application/common"
+	"58team_blog/internal/application/errors"
 	"58team_blog/internal/application/mapper"
 	"58team_blog/internal/application/queries"
 	"58team_blog/internal/domain/entities"
 	"58team_blog/internal/domain/repository"
-	"errors"
-	"fmt"
 )
 
 type UserService struct {
@@ -26,27 +25,23 @@ func (s *UserService) Create(cmd commands.CreateUserCommand) (*common.UserResult
 	{
 		user, err := s.repo.FindByName(cmd.Username)
 		if err != nil {
-			return nil, fmt.Errorf("User.create findByName error: %s", err)
+			return nil, errors.NewDBError(err.Error())
 		}
 
 		if user != nil {
-			return nil, fmt.Errorf("User: %s already exists", user.UserName)
+			return nil, errors.NewAlreadyExistsError("user: " + cmd.Username)
 		}
 	}
 
 	// Create new user
 	user, err := entities.CreateUser(cmd.Username, cmd.Password)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
-	}
-
-	if err := user.Validate(); err != nil {
-		return nil, err
 	}
 
 	entity, err := s.repo.Create(&user)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	result := mapper.CreateUserResultFromEntity(entity)
@@ -57,11 +52,11 @@ func (s *UserService) Create(cmd commands.CreateUserCommand) (*common.UserResult
 func (s *UserService) FindById(query queries.UserFindByIdQuery) (*queries.UserFindByIdResult, error) {
 	entity, err := s.repo.FindById(query.Id)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	if err := entity.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	result := mapper.CreateUserFindByIdResultFromEntity(entity)
@@ -72,11 +67,11 @@ func (s *UserService) FindById(query queries.UserFindByIdQuery) (*queries.UserFi
 func (s *UserService) FindByName(query queries.UserFindByNameQuery) (*queries.UserFindByNameResult, error) {
 	entity, err := s.repo.FindByName(query.Name)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	if err := entity.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	result := mapper.CreateUserFindByNameResultFromEntity(entity)
@@ -86,12 +81,12 @@ func (s *UserService) FindByName(query queries.UserFindByNameQuery) (*queries.Us
 func (s *UserService) GetAll() (*queries.UserGetAllResult, error) {
 	entityList, err := s.repo.GetAll()
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	for _, e := range entityList {
 		if err := e.Validate(); err != nil {
-			return nil, err
+			return nil, errors.NewValidationError(err.Error())
 		}
 	}
 
@@ -102,25 +97,25 @@ func (s *UserService) GetAll() (*queries.UserGetAllResult, error) {
 func (s *UserService) Update(cmd commands.UpdateUserCommand) (*common.UserResult, error) {
 	entity, err := s.repo.FindById(cmd.Id)
 	if err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	if err := entity.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	if cmd.Username != entity.UserName {
-		return nil, errors.New("You cannot change user name")
+		return nil, errors.NewValidationError("You cannot change user name")
 	}
 
 	entity.Password = cmd.Password
 
 	if err := entity.Validate(); err != nil {
-		return nil, err
+		return nil, errors.NewValidationError(err.Error())
 	}
 
 	if err := s.repo.Update(entity); err != nil {
-		return nil, err
+		return nil, errors.NewDBError(err.Error())
 	}
 
 	result := mapper.CreateUserResultFromEntity(entity)
@@ -130,15 +125,15 @@ func (s *UserService) Update(cmd commands.UpdateUserCommand) (*common.UserResult
 func (s *UserService) Delete(cmd commands.DeleteUserCommand) error {
 	entity, err := s.repo.FindById(cmd.Id)
 	if err != nil {
-		return err
+		return errors.NewDBError(err.Error())
 	}
 
 	if err := entity.Validate(); err != nil {
-		return err
+		return errors.NewValidationError(err.Error())
 	}
 
 	if err := s.repo.Delete(entity.Id); err != nil {
-		return err
+		return errors.NewDBError(err.Error())
 	}
 
 	return nil

internal/interfaces/api/controllers/post_controller.go

@@ -7,6 +7,7 @@ import (
 	"58team_blog/internal/interfaces/api/mapper"
 	"58team_blog/internal/interfaces/api/requests"
 	"58team_blog/internal/interfaces/api/responses"
+	"58team_blog/internal/utils"
 	"log"
 	"net/http"
 	"strconv"
@@ -42,7 +43,7 @@ func (r *PostController) Post(c *gin.Context) {
 
 	if err := c.BindJSON(&request); err != nil {
 		log.Println(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "BadRequest")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -64,8 +65,7 @@ func (r *PostController) Post(c *gin.Context) {
 
 	res, err := r.service.Create(cmd)
 	if err != nil {
-		log.Println(err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusInternalServerError, "Internal server error")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -87,8 +87,7 @@ func (r *PostController) Post(c *gin.Context) {
 func (r *PostController) GetAll(c *gin.Context) {
 	result, err := r.service.GetAll()
 	if err != nil {
-		log.Println(err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusInternalServerError, "Internal server error")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -107,21 +106,21 @@ func (r *PostController) GetAll(c *gin.Context) {
 //	@Produce		json
 //	@Success		200	{array}	responses.GetListPostResponseItem
 //	@Failure		400 {object} responses.ErrorResponse
+//	@Failure		500	{object}	responses.ErrorResponse
 //	@Router			/post/offset/{offset} [get]
 func (r *PostController) GetAllWithOffset(c *gin.Context) {
 	offset_param := c.Param("offset")
 	offset, err := strconv.Atoi(offset_param)
 	if err != nil {
 		log.Println("Post get all with offset error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Invalid offset value")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
 
 	result, err := r.service.GetAllOffset(offset)
 	if err != nil {
-		log.Println("Post get all with offset error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -140,6 +139,8 @@ func (r *PostController) GetAllWithOffset(c *gin.Context) {
 //	@Produce		json
 //	@Success		200	{array}		responses.PostResponse
 //	@Failure		400	{object}	responses.ErrorResponse
+//	@Failure		404	{object}	responses.ErrorResponse
+//	@Failure		500	{object}	responses.ErrorResponse
 //	@Router			/post/{id} [get]
 func (r *PostController) GetById(c *gin.Context) {
 	id := c.Param("id")
@@ -158,8 +159,7 @@ func (r *PostController) GetById(c *gin.Context) {
 
 	posts, err := r.service.FindById(query)
 	if err != nil {
-		log.Println("Post service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -181,6 +181,8 @@ func (r *PostController) GetById(c *gin.Context) {
 //	@Produce		json
 //	@Success		200	{object}	responses.PostResponse
 //	@Failure		400	{object}	responses.ErrorResponse
+//	@Failure		404	{object}	responses.ErrorResponse
+//	@Failure		500	{object}	responses.ErrorResponse
 //	@Router			/post/{id} [put]
 func (r *PostController) Put(c *gin.Context) {
 	var request requests.PutPostRequest
@@ -189,14 +191,14 @@ func (r *PostController) Put(c *gin.Context) {
 	id_valid, err := uuid.Parse(id)
 	if err != nil {
 		log.Println("Post: invalid post id: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
 
 	if err := c.BindJSON(request); err != nil {
 		log.Println("Post request error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -210,8 +212,7 @@ func (r *PostController) Put(c *gin.Context) {
 
 	post, err := r.service.Update(cmd)
 	if err != nil {
-		log.Println("Post service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -229,13 +230,15 @@ func (r *PostController) Put(c *gin.Context) {
 //	@Produce		json
 //	@Success		200
 //	@Failure		400	{object}	responses.ErrorResponse
+//	@Failure		404	{object}	responses.ErrorResponse
+//	@Failure		500	{object}	responses.ErrorResponse
 //	@Router			/post/{id} [delete]
 func (r *PostController) Delete(c *gin.Context) {
 	id := c.Param("id")
 	id_valid, err := uuid.Parse(id)
 	if err != nil {
 		log.Println("Post: invalid post id: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -245,8 +248,7 @@ func (r *PostController) Delete(c *gin.Context) {
 	}
 	err = r.service.Delete(cmd)
 	if err != nil {
-		log.Println("Post delete error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}

internal/interfaces/api/controllers/user_controller.go

@@ -33,19 +33,21 @@ func CreateUserController(service *services.UserService) UserController {
 // @Param		request body requests.CreateUserRequest	true "User data"
 // @Success	201 {object} responses.UserResponse
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	409 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/ [post]
 func (r *UserController) Post(c *gin.Context) {
 	var request requests.CreateUserRequest
 	if err := c.BindJSON(&request); err != nil {
 		log.Println("User invalid request: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
 
 	encrypted_password, err := utils.EncryptPassword(request.Password)
 	if err != nil {
-		log.Println("User encrupt password error: ", err)
+		log.Println("User encrypt password error: ", err)
 		resp := responses.CreateErrorResponse(http.StatusInternalServerError, "Internal server error")
 		c.JSON(resp.ErrorCode, resp)
 		return
@@ -58,8 +60,7 @@ func (r *UserController) Post(c *gin.Context) {
 
 	user, err := r.service.Create(cmd)
 	if err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -77,6 +78,8 @@ func (r *UserController) Post(c *gin.Context) {
 // @Param		id path string true "user id"
 // @Success	200 {object} responses.UserResponse
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	404 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/{id} [get]
 func (r *UserController) FindById(c *gin.Context) {
 	id_path := c.Param("id")
@@ -84,7 +87,7 @@ func (r *UserController) FindById(c *gin.Context) {
 	id, err := uuid.Parse(id_path)
 	if err != nil {
 		log.Println("User id error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Invalid user id")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -95,8 +98,7 @@ func (r *UserController) FindById(c *gin.Context) {
 
 	user, err := r.service.FindById(query)
 	if err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusNotFound, "Not found")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -113,6 +115,8 @@ func (r *UserController) FindById(c *gin.Context) {
 // @Param		name path string true "User name"
 // @Success	200 {object} responses.UserResponse
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	404 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/name/{name} [get]
 func (r *UserController) FindByName(c *gin.Context) {
 	name := c.Param("name")
@@ -123,8 +127,7 @@ func (r *UserController) FindByName(c *gin.Context) {
 
 	user, err := r.service.FindByName(query)
 	if err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusNotFound, "Not found")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -139,12 +142,12 @@ func (r *UserController) FindByName(c *gin.Context) {
 // @Produce	json
 // @Success	200 {object} responses.UserResponseList
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/ [get]
 func (r *UserController) GetAll(c *gin.Context) {
 	users, err := r.service.GetAll()
 	if err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusInternalServerError, "Internal server error")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -162,6 +165,8 @@ func (r *UserController) GetAll(c *gin.Context) {
 // @Param		request body requests.PutUserRequest true "User data"
 // @Success	200 {object} responses.UserResponse
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	404 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/{id} [put]
 func (r *UserController) Put(c *gin.Context) {
 	var request requests.PutUserRequest
@@ -170,14 +175,14 @@ func (r *UserController) Put(c *gin.Context) {
 	id, err := uuid.Parse(id_path)
 	if err != nil {
 		log.Println("User id error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Invalid user ID")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
 
 	if err := c.BindJSON(&request); err != nil {
 		log.Println("User request error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, err.Error())
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -198,8 +203,7 @@ func (r *UserController) Put(c *gin.Context) {
 
 	user, err := r.service.Update(cmd)
 	if err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusInternalServerError, "Internal server error")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -215,6 +219,8 @@ func (r *UserController) Put(c *gin.Context) {
 // @Param		id path string true "User id"
 // @Success	200
 // @Failure	400 {object} responses.ErrorResponse
+// @Failure	404 {object} responses.ErrorResponse
+// @Failure	500 {object} responses.ErrorResponse
 // @Router		/user/{id} [delete]
 func (r *UserController) Delete(c *gin.Context) {
 	id_path := c.Param("id")
@@ -222,7 +228,7 @@ func (r *UserController) Delete(c *gin.Context) {
 	id, err := uuid.Parse(id_path)
 	if err != nil {
 		log.Println("User id error: ", err)
-		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Bad request")
+		resp := responses.CreateErrorResponse(http.StatusBadRequest, "Invalid user id")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}
@@ -232,8 +238,7 @@ func (r *UserController) Delete(c *gin.Context) {
 	}
 
 	if err := r.service.Delete(cmd); err != nil {
-		log.Println("User service error: ", err)
+		resp := utils.HandleError(err)
-		resp := responses.CreateErrorResponse(http.StatusNotFound, "User not found")
 		c.JSON(resp.ErrorCode, resp)
 		return
 	}

internal/utils/error_handler.go

@@ -0,0 +1,30 @@
+package utils
+
+import (
+	ie "58team_blog/internal/application/errors"
+	"58team_blog/internal/interfaces/api/responses"
+	"errors"
+	"log"
+	"net/http"
+)
+
+func HandleError(err error) responses.ErrorResponse {
+	var errorCode int
+	errorMsg := err.Error()
+
+	log.Println(err)
+
+	if errors.Is(&ie.ValidationError{}, err) {
+		errorCode = http.StatusBadRequest
+	} else if errors.Is(&ie.NotFoundError{}, err) {
+		errorCode = http.StatusNotFound
+	} else if errors.Is(&ie.AlreadyExistsError{}, err) {
+		errorCode = http.StatusConflict
+	} else if errors.Is(&ie.DBError{}, err) {
+		errorCode = http.StatusInternalServerError
+	} else {
+		errorCode = http.StatusInternalServerError
+	}
+
+	return responses.CreateErrorResponse(errorCode, errorMsg)
+}