Initial QSfera import

Server/vendor/github.com/invopop/validation/match.go

@@ -0,0 +1,56 @@
+// 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 (
+	"regexp"
+)
+
+// ErrMatchInvalid is the error that returns in case of invalid format.
+var ErrMatchInvalid = NewError("validation_match_invalid", "must be in a valid format")
+
+// Match returns a validation rule that checks if a value matches the specified regular expression.
+// This rule should only be used for validating strings and byte slices, or a validation error will be reported.
+// An empty value is considered valid. Use the Required rule to make sure a value is not empty.
+func Match(re *regexp.Regexp) MatchRule {
+	return MatchRule{
+		re:  re,
+		err: ErrMatchInvalid,
+	}
+}
+
+// MatchRule is a validation rule that checks if a value matches the specified regular expression.
+type MatchRule struct {
+	re  *regexp.Regexp
+	err Error
+}
+
+// Validate checks if the given value is valid or not.
+func (r MatchRule) Validate(value interface{}) error {
+	value, isNil := Indirect(value)
+	if isNil {
+		return nil
+	}
+
+	isString, str, isBytes, bs := StringOrBytes(value)
+	if isString && (str == "" || r.re.MatchString(str)) {
+		return nil
+	} else if isBytes && (len(bs) == 0 || r.re.Match(bs)) {
+		return nil
+	}
+	return r.err
+}
+
+// Error sets the error message for the rule.
+func (r MatchRule) Error(message string) MatchRule {
+	r.err = r.err.SetMessage(message)
+	return r
+}
+
+// ErrorObject sets the error struct for the rule.
+func (r MatchRule) ErrorObject(err Error) MatchRule {
+	r.err = err
+	return r
+}