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// Copyright 2016 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package names
import (
"regexp"
)
// ControllerTagKind indicates that a tag belongs to a controller.
const ControllerTagKind = "controller"
// ControllerTag represents a tag used to describe a controller.
type ControllerTag struct {
uuid string
}
// Lowercase letters, digits and (non-leading) hyphens.
var validControllerName = regexp.MustCompile(`^[a-z0-9]+[a-z0-9-]*$`)
// NewControllerTag returns the tag of an controller with the given controller UUID.
func NewControllerTag(uuid string) ControllerTag {
return ControllerTag{uuid: uuid}
}
// ParseControllerTag parses an environ tag string.
func ParseControllerTag(controllerTag string) (ControllerTag, error) {
tag, err := ParseTag(controllerTag)
if err != nil {
return ControllerTag{}, err
}
et, ok := tag.(ControllerTag)
if !ok {
return ControllerTag{}, invalidTagError(controllerTag, ControllerTagKind)
}
return et, nil
}
// String implements Tag.
func (t ControllerTag) String() string { return t.Kind() + "-" + t.Id() }
// Kind implements Tag.
func (t ControllerTag) Kind() string { return ControllerTagKind }
// Id implements Tag.
func (t ControllerTag) Id() string { return t.uuid }
// IsValidController returns whether id is a valid controller UUID.
func IsValidController(id string) bool {
return validUUID.MatchString(id)
}
// IsValidControllerName returns whether name is a valid string safe for a controller name.
func IsValidControllerName(name string) bool {
return validControllerName.MatchString(name)
}
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