205 lines
3.9 KiB
Go
205 lines
3.9 KiB
Go
package activitypub
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import (
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"net/url"
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"path"
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"strings"
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)
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const (
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// ActivityBaseURI the URI for the activity streams namespace
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ActivityBaseURI = IRI("https://www.w3.org/ns/activitystreams")
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// SecurityContextURI the URI for the secruity namespace (for an Actor's PublicKey)
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SecurityContextURI = IRI("https://w3id.org/security/v1")
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// PublicNs is the reference to the Public entity in the Acitivystreams namespace
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PublicNS = IRI(ActivityBaseURI + "#Public")
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)
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var JsonLDContext = []IRI{
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ActivityBaseURI,
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SecurityContextURI,
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}
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type (
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// IRI is a Internationalized Resource Identifiers (IRIs) RFC3987
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IRI string
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IRIs []IRI
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)
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// String returns the String value of the IRI object
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func (i IRI) String() string {
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return string(i)
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}
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// GetLink
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func (i IRI) GetLink() IRI {
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return i
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}
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// URL
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func (i IRI) URL() (*url.URL, error) {
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return url.Parse(i.String())
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}
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// UnmarshalJSON
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func (i *IRI) UnmarshalJSON(s []byte) error {
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*i = IRI(strings.Trim(string(s), "\""))
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return nil
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}
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// MarshalJSON
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func (i IRI) MarshalJSON() ([]byte, error) {
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b := make([]byte, 0)
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write(&b, '"')
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writeS(&b, i.String())
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write(&b, '"')
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return b, nil
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}
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// GetID
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func (i IRI) GetID() ID {
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return ID(i)
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}
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// GetType
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func (i IRI) GetType() ActivityVocabularyType {
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return LinkType
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}
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// IsLink
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func (i IRI) IsLink() bool {
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return true
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}
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// IsObject
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func (i IRI) IsObject() bool {
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return false
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}
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// IsCollection returns false for IRI objects
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func (i IRI) IsCollection() bool {
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return false
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}
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// FlattenToIRI checks if Item can be flatten to an IRI and returns it if so
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func FlattenToIRI(it Item) Item {
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if it != nil && it.IsObject() && len(it.GetLink()) > 0 {
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return it.GetLink()
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}
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return it
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}
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func (i IRIs) MarshalJSON() ([]byte, error) {
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b := make([]byte, 0)
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if len(i) == 0 {
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return nil, nil
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}
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notEmpty := false
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writeComma := func() { writeS(&b, ",") }
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writeCommaIfNotEmpty := func(notEmpty bool) {
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if notEmpty {
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writeComma()
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}
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}
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write(&b, '[')
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for _, iri := range i {
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writeCommaIfNotEmpty(notEmpty)
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write(&b, '"')
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writeS(&b, iri.String())
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write(&b, '"')
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}
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write(&b, ']')
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return b, nil
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}
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// Contains verifies if IRIs array contains the received one
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func (i IRIs) Contains(r IRI) bool {
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if len(i) == 0 {
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return false
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}
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for _, iri := range i {
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if r.Equals(iri, false) {
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return true
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}
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}
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return false
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}
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func validURL(u *url.URL) bool {
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return len(u.Scheme) > 0 && len(u.Host) > 0
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}
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// Equals verifies if our receiver IRI is equals with the "with" IRI
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// It ignores the protocol
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// It tries to use the URL representation if possible and fallback to string comparison if unable to convert
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// In URL representation checks hostname in a case insensitive way and the path and
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func (i IRI) Equals(with IRI, checkScheme bool) bool {
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u, e := i.URL()
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uw, ew := with.URL()
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if e != nil || ew != nil || !validURL(u) || !validURL(uw) {
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return strings.ToLower(i.String()) == strings.ToLower(with.String())
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}
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if checkScheme {
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if strings.ToLower(u.Scheme) != strings.ToLower(uw.Scheme) {
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return false
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}
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}
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if strings.ToLower(u.Host) != strings.ToLower(uw.Host) {
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return false
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}
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if path.Clean(u.Path) != path.Clean(uw.Path) {
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return false
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}
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uq := u.Query()
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uwq := uw.Query()
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if len(uq) != len(uwq) {
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return false
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}
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for k, uqv := range uq {
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uwqv, ok := uwq[k]
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if !ok {
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return false
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}
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if len(uqv) != len(uwqv) {
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return false
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}
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for _, uqvv := range uqv {
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eq := false
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for _, uwqvv := range uwqv {
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if uwqvv == uqvv {
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eq = true
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continue
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}
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}
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if !eq {
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return false
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}
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}
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}
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return true
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}
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func (i IRI) Contains(what IRI, checkScheme bool) bool {
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u, e := i.URL()
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uw, ew := what.URL()
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if e != nil || ew != nil {
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return strings.Contains(i.String(), what.String())
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}
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if checkScheme {
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if u.Scheme != uw.Scheme {
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return false
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}
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}
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if u.Host != uw.Host {
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return false
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}
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p := u.Path
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if p != "" {
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p = path.Clean(p)
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}
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pw := uw.Path
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if pw != "" {
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pw = path.Clean(pw)
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}
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return strings.Contains(p, pw)
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}
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