From 07d66c7ca86cb5ed756e23147ec0aff17f5511c1 Mon Sep 17 00:00:00 2001
From: Sasha Melentyev <sasha@melentyev.io>
Date: Thu, 2 Nov 2023 17:03:43 +0300
Subject: [PATCH] feat(validate): add min/max errors for handling in app

---
 validate/array.go |  4 ++--
 validate/error.go | 30 ++++++++++++++++++++++++++----
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/validate/array.go b/validate/array.go
index d50304b9a..4904ff36b 100644
--- a/validate/array.go
+++ b/validate/array.go
@@ -38,10 +38,10 @@ func (t Array) Set() bool {
 // ValidateLength returns error if array length v is invalid.
 func (t Array) ValidateLength(v int) error {
 	if t.MaxLengthSet && v > t.MaxLength {
-		return errors.Errorf("len %d greater than maximum %d", v, t.MaxLength)
+		return &MaxLengthError{Len: v, MaxLength: t.MaxLength}
 	}
 	if t.MinLengthSet && v < t.MinLength {
-		return errors.Errorf("len %d less than minimum %d", v, t.MinLength)
+		return &MinLengthError{Len: v, MinLength: t.MinLength}
 	}
 
 	return nil
diff --git a/validate/error.go b/validate/error.go
index c7833bd95..273336599 100644
--- a/validate/error.go
+++ b/validate/error.go
@@ -48,8 +48,8 @@ type InvalidContentTypeError struct {
 }
 
 // InvalidContentTypeError implements error.
-func (i *InvalidContentTypeError) Error() string {
-	return fmt.Sprintf("unexpected Content-Type: %s", i.ContentType)
+func (e *InvalidContentTypeError) Error() string {
+	return fmt.Sprintf("unexpected Content-Type: %s", e.ContentType)
 }
 
 // InvalidContentType creates new InvalidContentTypeError.
@@ -72,9 +72,31 @@ func UnexpectedStatusCode(statusCode int) error {
 }
 
 // UnexpectedStatusCodeError implements error.
-func (i *UnexpectedStatusCodeError) Error() string {
-	return fmt.Sprintf("unexpected status code: %d", i.StatusCode)
+func (e *UnexpectedStatusCodeError) Error() string {
+	return fmt.Sprintf("unexpected status code: %d", e.StatusCode)
 }
 
 // ErrNilPointer reports that use Validate, but receiver pointer is nil.
 var ErrNilPointer = errors.New("nil pointer")
+
+// MinLengthError reports that len less than minimum.
+type MinLengthError struct {
+	Len       int
+	MinLength int
+}
+
+// MinLengthError implements error.
+func (e *MinLengthError) Error() string {
+	return fmt.Sprintf("len %d less than minimum %d", e.Len, e.MinLength)
+}
+
+// MaxLengthError reports that len greater than maximum.
+type MaxLengthError struct {
+	Len       int
+	MaxLength int
+}
+
+// MaxLengthError implements error.
+func (e *MaxLengthError) Error() string {
+	return fmt.Sprintf("len %d greater than maximum %d", e.Len, e.MaxLength)
+}