vendor dependencies with dep

vendor/github.com/go-ozzo/ozzo-validation/length.go

@@ -0,0 +1,77 @@
+// Copyright 2016 Qiang Xue. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package validation
+
+import (
+	"errors"
+	"fmt"
+	"unicode/utf8"
+)
+
+// Length returns a validation rule that checks if a value's length is within the specified range.
+// If max is 0, it means there is no upper bound for the length.
+// This rule should only be used for validating strings, slices, maps, and arrays.
+// An empty value is considered valid. Use the Required rule to make sure a value is not empty.
+func Length(min, max int) *lengthRule {
+	message := "the value must be empty"
+	if min == 0 && max > 0 {
+		message = fmt.Sprintf("the length must be no more than %v", max)
+	} else if min > 0 && max == 0 {
+		message = fmt.Sprintf("the length must be no less than %v", min)
+	} else if min > 0 && max > 0 {
+		message = fmt.Sprintf("the length must be between %v and %v", min, max)
+	}
+	return &lengthRule{
+		min:     min,
+		max:     max,
+		message: message,
+	}
+}
+
+// RuneLength returns a validation rule that checks if a string's rune length is within the specified range.
+// If max is 0, it means there is no upper bound for the length.
+// This rule should only be used for validating strings, slices, maps, and arrays.
+// An empty value is considered valid. Use the Required rule to make sure a value is not empty.
+// If the value being validated is not a string, the rule works the same as Length.
+func RuneLength(min, max int) *lengthRule {
+	r := Length(min, max)
+	r.rune = true
+	return r
+}
+
+type lengthRule struct {
+	min, max int
+	message  string
+	rune     bool
+}
+
+// Validate checks if the given value is valid or not.
+func (v *lengthRule) Validate(value interface{}) error {
+	value, isNil := Indirect(value)
+	if isNil || IsEmpty(value) {
+		return nil
+	}
+
+	var (
+		l   int
+		err error
+	)
+	if s, ok := value.(string); ok && v.rune {
+		l = utf8.RuneCountInString(s)
+	} else if l, err = LengthOfValue(value); err != nil {
+		return err
+	}
+
+	if v.min > 0 && l < v.min || v.max > 0 && l > v.max {
+		return errors.New(v.message)
+	}
+	return nil
+}
+
+// Error sets the error message for the rule.
+func (v *lengthRule) Error(message string) *lengthRule {
+	v.message = message
+	return v
+}