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strings.go
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/
strings.go
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package validate
import (
"encoding/base64"
"fmt"
"strings"
)
// Base64EncodedString validates that the string is base64 encoded
func Base64EncodedString(i interface{}, k string) ([]string, []error) {
v, ok := i.(string)
if !ok {
return nil, []error{fmt.Errorf("expected type of %q to be string", k)}
}
if strings.TrimSpace(v) == "" {
return nil, []error{fmt.Errorf("%q must not be empty", k)}
}
if _, err := base64.StdEncoding.DecodeString(v); err != nil {
return nil, []error{fmt.Errorf("%q must be a valid base64 encoded string", k)}
}
return nil, nil
}
// LowerCasedString validates that the string is lower-cased
func LowerCasedString(i interface{}, k string) ([]string, []error) {
v, ok := i.(string)
if !ok {
return nil, []error{fmt.Errorf("expected type of %q to be string", k)}
}
if strings.TrimSpace(v) == "" {
return nil, []error{fmt.Errorf("%q must not be empty", k)}
}
if strings.ToLower(v) != v {
return nil, []error{fmt.Errorf("%q must be a lower-cased string", k)}
}
if strings.ContainsAny(v, " ") {
return nil, []error{fmt.Errorf("%q cannot contain whitespace", k)}
}
return nil, nil
}