110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
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// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
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package identity
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import (
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"os"
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"fmt"
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"strings"
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"net/url"
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"feudal/sequence"
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)
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var Serial sequence.Serial32
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var spid uint64
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var serial uint64
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var hostname string
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type Addresser interface {
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Address() string
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}
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type Identifier interface {
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Addresser
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Instance() string
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Path() string
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Hostname() string
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String() string
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Parent() Identifier
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CreateChild(string) Identifier
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}
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type Id struct {
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parent Identifier
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Name string
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url *url.URL
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instance string
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}
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func init() {
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Serial = sequence.NewSerial32()
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spid = uint64(os.Getpid()) << 32
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hostname, _ = os.Hostname()
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}
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func New(parent Identifier, name string) Identifier {
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url,_ := url.Parse(parent.Address())
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url.Path += "/" + name
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i := &Id{ parent: parent, Name: name, url: url, instance: InstanceId() }
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return i
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}
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func NewRoot(name string) Identifier {
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return &Id{ parent: nil, Name: name, url: &url.URL{ Scheme: "feudal", User: url.User(name), Host: hostname, Path: "" }, instance: InstanceId() }
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}
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func NewFromAddress(address string) Identifier {
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id := &Id{ parent: nil, instance: InstanceId() }
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id.url,_ = url.Parse(address)
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elements := strings.Split(id.url.Path, "/")
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le := len(elements)
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if le == 0 {
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id.Name = id.url.User.Username()
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} else {
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id.Name = elements[le - 1]
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}
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return id
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}
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func InstanceId() string {
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return fmt.Sprintf("%x", spid | uint64(Serial()))
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}
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func (i *Id) Instance() string {
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return i.instance
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}
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func (i *Id) Path() string {
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return i.url.Path
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}
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func (i *Id) Hostname() string {
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return i.url.Hostname()
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}
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func (parent *Id) CreateChild(name string) Identifier {
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url,_ := url.Parse(parent.Address())
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url.Path += "/" + name
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i := &Id{ parent: parent, Name: name, url: url, instance: InstanceId() }
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return i
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}
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func (i *Id) Parent() Identifier {
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return i.parent
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}
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func (i *Id) Elements() []string {
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return strings.Split(i.url.Path, "/")
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}
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func (i *Id) String() string {
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return i.Address() + "#" + i.instance
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}
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func (i *Id) Address() string {
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return i.url.String()
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}
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