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package ovsdb
import (
"encoding/json"
"fmt"
"regexp"
)
var validUUID = regexp.MustCompile(`^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$`)
// UUID is a UUID according to RFC7047
type UUID struct {
GoUUID string `json:"uuid"`
}
// MarshalJSON will marshal an OVSDB style UUID to a JSON encoded byte array
func (u UUID) MarshalJSON() ([]byte, error) {
var uuidSlice []string
err := ValidateUUID(u.GoUUID)
if err == nil {
uuidSlice = []string{"uuid", u.GoUUID}
} else {
uuidSlice = []string{"named-uuid", u.GoUUID}
}
return json.Marshal(uuidSlice)
}
// UnmarshalJSON will unmarshal a JSON encoded byte array to a OVSDB style UUID
func (u *UUID) UnmarshalJSON(b []byte) (err error) {
var ovsUUID []string
if err := json.Unmarshal(b, &ovsUUID); err == nil {
u.GoUUID = ovsUUID[1]
}
return err
}
func ValidateUUID(uuid string) error {
if len(uuid) != 36 {
return fmt.Errorf("uuid exceeds 36 characters")
}
if !validUUID.MatchString(uuid) {
return fmt.Errorf("uuid does not match regexp")
}
return nil
}
func IsNamedUUID(uuid string) bool {
return len(uuid) > 0 && !validUUID.MatchString(uuid)
}
func IsValidUUID(uuid string) bool {
if err := ValidateUUID(uuid); err != nil {
return false
}
return true
}
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