feat: add validation tags to request DTOs

internal/dto/auth_request.go

@@ -1,51 +1,51 @@
 package dto
 
 type LoginRequest struct {
-	Username string `json:"username"`
-	Password string `json:"password"`
+	Username string `json:"username" validate:"required,min=3,max=50"`
+	Password string `json:"password" validate:"required,min=8,max=128"`
 }
 
 type RegisterRequest struct {
-	Username string `json:"username"`
-	Email    string `json:"email"`
-	Password string `json:"password"`
+	Username string `json:"username" validate:"required,min=3,max=50"`
+	Email    string `json:"email" validate:"required,email,max=254"`
+	Password string `json:"password" validate:"required,min=8,max=128"`
 }
 
 type ResendVerificationRequest struct {
-	Email string `json:"email"`
+	Email string `json:"email" validate:"required,email,max=254"`
 }
 
 type ForgotPasswordRequest struct {
-	UsernameOrEmail string `json:"username_or_email"`
+	UsernameOrEmail string `json:"username_or_email" validate:"required"`
 }
 
 type ResetPasswordRequest struct {
-	Token       string `json:"token"`
-	NewPassword string `json:"new_password"`
+	Token       string `json:"token" validate:"required"`
+	NewPassword string `json:"new_password" validate:"required,min=8,max=128"`
 }
 
 type UpdateEmailRequest struct {
-	Email string `json:"email"`
+	Email string `json:"email" validate:"required,email,max=254"`
 }
 
 type UpdateUsernameRequest struct {
-	Username string `json:"username"`
+	Username string `json:"username" validate:"required,min=3,max=50"`
 }
 
 type UpdatePasswordRequest struct {
-	CurrentPassword string `json:"current_password"`
-	NewPassword     string `json:"new_password"`
+	CurrentPassword string `json:"current_password" validate:"required"`
+	NewPassword     string `json:"new_password" validate:"required,min=8,max=128"`
 }
 
 type ConfirmAccountDeletionRequest struct {
-	Token       string `json:"token"`
+	Token       string `json:"token" validate:"required"`
 	DeletePosts bool   `json:"delete_posts"`
 }
 
 type RefreshTokenRequest struct {
-	RefreshToken string `json:"refresh_token" example:"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." binding:"required"`
+	RefreshToken string `json:"refresh_token" example:"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." validate:"required"`
 }
 
 type RevokeTokenRequest struct {
-	RefreshToken string `json:"refresh_token" example:"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." binding:"required"`
+	RefreshToken string `json:"refresh_token" example:"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." validate:"required"`
 }