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// Copyright 2015 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package names
import (
"fmt"
"regexp"
)
const (
SpaceTagKind = "space"
SpaceSnippet = "(?:[a-z0-9]+(?:-[a-z0-9]+)*)"
)
var validSpace = regexp.MustCompile("^" + SpaceSnippet + "$")
// IsValidSpace reports whether name is a valid space name.
func IsValidSpace(name string) bool {
return validSpace.MatchString(name)
}
type SpaceTag struct {
name string
}
func (t SpaceTag) String() string { return t.Kind() + "-" + t.Id() }
func (t SpaceTag) Kind() string { return SpaceTagKind }
func (t SpaceTag) Id() string { return t.name }
// NewSpaceTag returns the tag of a space with the given name.
func NewSpaceTag(name string) SpaceTag {
if !IsValidSpace(name) {
panic(fmt.Sprintf("%q is not a valid space name", name))
}
return SpaceTag{name: name}
}
// ParseSpaceTag parses a space tag string.
func ParseSpaceTag(spaceTag string) (SpaceTag, error) {
tag, err := ParseTag(spaceTag)
if err != nil {
return SpaceTag{}, err
}
nt, ok := tag.(SpaceTag)
if !ok {
return SpaceTag{}, invalidTagError(spaceTag, SpaceTagKind)
}
return nt, nil
}
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