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object.go
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package activitypub
import (
"bytes"
"encoding/gob"
"fmt"
"io"
"reflect"
"strings"
"time"
"unsafe"
"github.com/valyala/fastjson"
)
const (
IRIType ActivityVocabularyType = "IRI"
ObjectType ActivityVocabularyType = "Object"
LinkType ActivityVocabularyType = "Link"
ActivityType ActivityVocabularyType = "Activity"
IntransitiveActivityType ActivityVocabularyType = "IntransitiveActivity"
ActorType ActivityVocabularyType = "Actor"
CollectionType ActivityVocabularyType = "Collection"
OrderedCollectionType ActivityVocabularyType = "OrderedCollection"
CollectionPageType ActivityVocabularyType = "CollectionPage"
OrderedCollectionPageType ActivityVocabularyType = "OrderedCollectionPage"
// ActivityPub Object Types
ArticleType ActivityVocabularyType = "Article"
AudioType ActivityVocabularyType = "Audio"
DocumentType ActivityVocabularyType = "Document"
EventType ActivityVocabularyType = "Event"
HashtagType ActivityVocabularyType = "Hashtag"
ImageType ActivityVocabularyType = "Image"
NoteType ActivityVocabularyType = "Note"
PageType ActivityVocabularyType = "Page"
PlaceType ActivityVocabularyType = "Place"
ProfileType ActivityVocabularyType = "Profile"
RelationshipType ActivityVocabularyType = "Relationship"
TombstoneType ActivityVocabularyType = "Tombstone"
VideoType ActivityVocabularyType = "Video"
// MentionType is a link type for @mentions
MentionType ActivityVocabularyType = "Mention"
)
var GenericTypes = ActivityVocabularyTypes{
ActivityType,
IntransitiveActivityType,
ObjectType,
ActorType,
}
var ObjectTypes = ActivityVocabularyTypes{
ArticleType,
AudioType,
DocumentType,
EventType,
ImageType,
NoteType,
PageType,
PlaceType,
ProfileType,
RelationshipType,
TombstoneType,
VideoType,
}
type (
// ActivityVocabularyType is the data type for an Activity type object
ActivityVocabularyType string
// ActivityObject is a subtype of Object that describes some form of action that may happen,
// is currently happening, or has already happened
ActivityObject interface {
// GetID returns the dereferenceable ActivityStreams object id
GetID() ID
// GetType returns the ActivityStreams type
GetType() ActivityVocabularyType
}
// LinkOrIRI is an interface that Object and Link structs implement, and at the same time
// they are kept disjointed
LinkOrIRI interface {
// GetLink returns the object id in IRI type
GetLink() IRI
}
// ObjectOrLink describes the requirements of an ActivityStreams object
ObjectOrLink interface {
ActivityObject
LinkOrIRI
// IsLink shows if current item represents a Link object or an IRI
IsLink() bool
// IsObject shows if current item represents an ActivityStreams object
IsObject() bool
// IsCollection shows if the current item represents an ItemCollection
IsCollection() bool
}
// Mapper interface allows external objects to implement their own mechanism for loading information
// from an ActivityStreams vocabulary object
Mapper interface {
// FromActivityStreams maps an ActivityStreams object to another struct representation
FromActivityStreams(Item) error
}
// MimeType is the type for representing MIME types in certain ActivityStreams properties
MimeType string
)
func (a ActivityVocabularyType) MarshalJSON() ([]byte, error) {
if len(a) == 0 {
return nil, nil
}
b := make([]byte, 0)
JSONWriteStringValue(&b, string(a))
return b, nil
}
// GobEncode
func (a ActivityVocabularyType) GobEncode() ([]byte, error) {
return []byte(a), nil
}
// GobDecode
func (a *ActivityVocabularyType) GobDecode(data []byte) error {
*a = ActivityVocabularyType(data)
return nil
}
// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface.
func (a *ActivityVocabularyType) UnmarshalBinary(data []byte) error {
return a.GobDecode(data)
}
// MarshalBinary implements the encoding.BinaryMarshaler interface.
func (a ActivityVocabularyType) MarshalBinary() ([]byte, error) {
return a.GobEncode()
}
type Objects interface {
Object | Tombstone | Place | Profile | Relationship |
Actors |
Activities |
IntransitiveActivities |
Collections |
IRI
}
// Object describes an ActivityPub object of any kind.
// It serves as the base type for most of the other kinds of objects defined in the Activity
// Vocabulary, including other Core types such as Activity, IntransitiveActivity, Collection and OrderedCollection.
type Object struct {
// ID provides the globally unique identifier for anActivity Pub Object or Link.
ID ID `jsonld:"id,omitempty"`
// Type identifies the Activity Pub Object or Link type. Multiple values may be specified.
Type ActivityVocabularyType `jsonld:"type,omitempty"`
// Name a simple, human-readable, plain-text name for the object.
// HTML markup MUST NOT be included. The name MAY be expressed using multiple language-tagged values.
Name NaturalLanguageValues `jsonld:"name,omitempty,collapsible"`
// Attachment identifies a resource attached or related to an object that potentially requires special handling.
// The intent is to provide a model that is at least semantically similar to attachments in email.
Attachment Item `jsonld:"attachment,omitempty"`
// AttributedTo identifies one or more entities to which this object is attributed. The attributed entities might not be Actors.
// For instance, an object might be attributed to the completion of another activity.
AttributedTo Item `jsonld:"attributedTo,omitempty"`
// Audience identifies one or more entities that represent the total population of entities
// for which the object can considered to be relevant.
Audience ItemCollection `jsonld:"audience,omitempty"`
// Content or textual representation of the Activity Pub Object encoded as a JSON string.
// By default, the value of content is HTML.
// The mediaType property can be used in the object to indicate a different content type.
// (The content MAY be expressed using multiple language-tagged values.)
Content NaturalLanguageValues `jsonld:"content,omitempty,collapsible"`
// Context identifies the context within which the object exists or an activity was performed.
// The notion of "context" used is intentionally vague.
// The intended function is to serve as a means of grouping objects and activities that share a
// common originating context or purpose. An example could be all activities relating to a common project or event.
Context Item `jsonld:"context,omitempty"`
// MediaType when used on an Object, identifies the MIME media type of the value of the content property.
// If not specified, the content property is assumed to contain text/html content.
MediaType MimeType `jsonld:"mediaType,omitempty"`
// EndTime the date and time describing the actual or expected ending time of the object.
// When used with an Activity object, for instance, the endTime property specifies the moment
// the activity concluded or is expected to conclude.
EndTime time.Time `jsonld:"endTime,omitempty"`
// Generator identifies the entity (e.g. an application) that generated the object.
Generator Item `jsonld:"generator,omitempty"`
// Icon indicates an entity that describes an icon for this object.
// The image should have an aspect ratio of one (horizontal) to one (vertical)
// and should be suitable for presentation at a small size.
Icon Item `jsonld:"icon,omitempty"`
// Image indicates an entity that describes an image for this object.
// Unlike the icon property, there are no aspect ratio or display size limitations assumed.
Image Item `jsonld:"image,omitempty"`
// InReplyTo indicates one or more entities for which this object is considered a response.
InReplyTo Item `jsonld:"inReplyTo,omitempty"`
// Location indicates one or more physical or logical locations associated with the object.
Location Item `jsonld:"location,omitempty"`
// Preview identifies an entity that provides a preview of this object.
Preview Item `jsonld:"preview,omitempty"`
// Published the date and time at which the object was published
Published time.Time `jsonld:"published,omitempty"`
// Replies identifies a Collection containing objects considered to be responses to this object.
Replies Item `jsonld:"replies,omitempty"`
// StartTime the date and time describing the actual or expected starting time of the object.
// When used with an Activity object, for instance, the startTime property specifies
// the moment the activity began or is scheduled to begin.
StartTime time.Time `jsonld:"startTime,omitempty"`
// Summary a natural language summarization of the object encoded as HTML.
// *Multiple language tagged summaries may be provided.)
Summary NaturalLanguageValues `jsonld:"summary,omitempty,collapsible"`
// Tag one or more "tags" that have been associated with an objects. A tag can be any kind of Activity Pub Object.
// The key difference between attachment and tag is that the former implies association by inclusion,
// while the latter implies associated by reference.
Tag ItemCollection `jsonld:"tag,omitempty"`
// Updated the date and time at which the object was updated
Updated time.Time `jsonld:"updated,omitempty"`
// URL identifies one or more links to representations of the object
URL Item `jsonld:"url,omitempty"`
// To identifies an entity considered to be part of the public primary audience of an Activity Pub Object
To ItemCollection `jsonld:"to,omitempty"`
// Bto identifies anActivity Pub Object that is part of the private primary audience of this Activity Pub Object.
Bto ItemCollection `jsonld:"bto,omitempty"`
// CC identifies anActivity Pub Object that is part of the public secondary audience of this Activity Pub Object.
CC ItemCollection `jsonld:"cc,omitempty"`
// BCC identifies one or more Objects that are part of the private secondary audience of this Activity Pub Object.
BCC ItemCollection `jsonld:"bcc,omitempty"`
// Duration when the object describes a time-bound resource, such as an audio or video, a meeting, etc,
// the duration property indicates the object's approximate duration.
// The value must be expressed as an xsd:duration as defined by [ xmlschema11-2],
// section 3.3.6 (e.g. a period of 5 seconds is represented as "PT5S").
Duration time.Duration `jsonld:"duration,omitempty"`
// This is a list of all Like activities with this object as the object property, added as a side effect.
// The likes collection MUST be either an OrderedCollection or a Collection and MAY be filtered on privileges
// of an authenticated user or as appropriate when no authentication is given.
Likes Item `jsonld:"likes,omitempty"`
// This is a list of all Announce activities with this object as the object property, added as a side effect.
// The shares collection MUST be either an OrderedCollection or a Collection and MAY be filtered on privileges
// of an authenticated user or as appropriate when no authentication is given.
Shares Item `jsonld:"shares,omitempty"`
// Source property is intended to convey some sort of source from which the content markup was derived,
// as a form of provenance, or to support future editing by clients.
// In general, clients do the conversion from source to content, not the other way around.
Source Source `jsonld:"source,omitempty"`
// due to Mastodon's non-standard attachment object definition, ( add object of type Document that has properties
// width and height, we copy these from the Link definition
Height uint `jsonld:"height,omitempty"`
Width uint `jsonld:"width,omitempty"`
Sensitive bool `jsonld:"sensitive,omitempty"`
// Any additional fields must be also added to Actor
}
// ObjectNew initializes a new Object
func ObjectNew(typ ActivityVocabularyType) *Object {
if !(ObjectTypes.Contains(typ)) {
typ = ObjectType
}
o := Object{Type: typ}
o.Name = NaturalLanguageValuesNew()
o.Content = NaturalLanguageValuesNew()
return &o
}
// GetID returns the ID corresponding to the current Object
func (o Object) GetID() ID {
return o.ID
}
// GetLink returns the IRI corresponding to the current Object
func (o Object) GetLink() IRI {
return IRI(o.ID)
}
// GetType returns the type of the current Object
func (o Object) GetType() ActivityVocabularyType {
return o.Type
}
// IsLink validates if currentActivity Pub Object is a Link
func (o Object) IsLink() bool {
return false
}
// IsObject validates if currentActivity Pub Object is an Object
func (o Object) IsObject() bool {
return true
}
// IsCollection returns false for Object objects
func (o Object) IsCollection() bool {
return false
}
// UnmarshalJSON decodes an incoming JSON document into the receiver object.
func (o *Object) UnmarshalJSON(data []byte) error {
p := fastjson.Parser{}
val, err := p.ParseBytes(data)
if err != nil {
return err
}
return JSONLoadObject(val, o)
}
// MarshalJSON encodes the receiver object to a JSON document.
func (o Object) MarshalJSON() ([]byte, error) {
b := make([]byte, 0)
JSONWrite(&b, '{')
if JSONWriteObjectValue(&b, o) {
JSONWrite(&b, '}')
return b, nil
}
return nil, nil
}
// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface.
func (o *Object) UnmarshalBinary(data []byte) error {
return o.GobDecode(data)
}
// MarshalBinary implements the encoding.BinaryMarshaler interface.
func (o Object) MarshalBinary() ([]byte, error) {
return o.GobEncode()
}
// GobEncode
func (o Object) GobEncode() ([]byte, error) {
mm := make(map[string][]byte)
hasData, err := mapObjectProperties(mm, &o)
if err != nil {
return nil, err
}
if !hasData {
return []byte{}, nil
}
bb := bytes.Buffer{}
g := gob.NewEncoder(&bb)
if err := g.Encode(mm); err != nil {
return nil, err
}
return bb.Bytes(), nil
}
// GobDecode
func (o *Object) GobDecode(data []byte) error {
if len(data) == 0 {
return nil
}
mm, err := gobDecodeObjectAsMap(data)
if err != nil {
return err
}
return unmapObjectProperties(mm, o)
}
func fmtObjectProps(w io.Writer) func(*Object) error {
return func(o *Object) error {
if len(o.ID) > 0 {
if n, _ := fmt.Fprintf(w, "ID:%s", o.ID); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if len(o.Name) > 0 {
if n, _ := fmt.Fprintf(w, "%s: [%s]", "name", o.Name); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if len(o.Summary) > 0 {
if n, _ := fmt.Fprintf(w, "%s: [%s]", "summary", o.Summary); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if len(o.Content) > 0 {
if n, _ := fmt.Fprintf(w, "%s: [%s]", "content", o.Content); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Attachment) {
if n, _ := fmt.Fprintf(w, "%s: %s", "attachment", o.Attachment); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.AttributedTo) {
if n, _ := fmt.Fprintf(w, "%s: %s", "attributedTo", o.AttributedTo); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Audience) && o.Audience.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "audience", o.Audience); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Context) {
if n, _ := fmt.Fprintf(w, "%s: %s", "context", o.Context); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Generator) {
if n, _ := fmt.Fprintf(w, "%s: %s", "generator", o.Generator); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Icon) {
if n, _ := fmt.Fprintf(w, "%s: %s", "icon", o.Icon); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Image) {
if n, _ := fmt.Fprintf(w, "%s: %s", "image", o.Image); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.InReplyTo) {
if n, _ := fmt.Fprintf(w, "%s: %s", "inReplyTo", o.InReplyTo); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Location) {
if n, _ := fmt.Fprintf(w, "%s: %s", "location", o.Location); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Preview) {
if n, _ := fmt.Fprintf(w, "%s: %s", "preview", o.Preview); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Replies) {
if n, _ := fmt.Fprintf(w, "%s: %s", "replies", o.Replies); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Tag) && o.Tag.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "tag", o.Tag); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.URL) {
if n, _ := fmt.Fprintf(w, "%s: %s", "url", o.URL); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.To) && o.To.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "to", o.To); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Bto) && o.Bto.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "bto", o.Bto); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.CC) && o.CC.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "cc", o.CC); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.BCC) && o.BCC.Count() > 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "bcc", o.BCC); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !o.Published.IsZero() {
if n, _ := fmt.Fprintf(w, "%s: %s", "published", o.Published); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !o.Updated.IsZero() {
if n, _ := fmt.Fprintf(w, "%s: %s", "updated", o.Updated); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !o.StartTime.IsZero() {
if n, _ := fmt.Fprintf(w, "%s: %s", "startTime", o.StartTime); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !o.EndTime.IsZero() {
if n, _ := fmt.Fprintf(w, "%s: %s", "endTime", o.EndTime); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if o.Duration != 0 {
if n, _ := fmt.Fprintf(w, "%s: %s", "duration", o.Duration); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Likes) {
if n, _ := fmt.Fprintf(w, "%s: %s", "likes", o.Likes); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
if !IsNil(o.Shares) {
if n, _ := fmt.Fprintf(w, "%s: %s", "shares", o.Shares); n > 0 {
_, _ = io.WriteString(w, ", ")
}
}
return nil
}
}
func (o Object) Format(s fmt.State, verb rune) {
switch verb {
case 's':
if o.Type != "" && o.ID != "" {
_, _ = fmt.Fprintf(s, "%T[%s]( %s )", o, o.Type, o.ID)
} else if o.ID != "" {
_, _ = fmt.Fprintf(s, "%T( %s )", o, o.ID)
} else {
_, _ = fmt.Fprintf(s, "%T[%p]", o, &o)
}
case 'v':
if o.Type != "" && o.ID != "" {
_, _ = fmt.Fprintf(s, "%T[%s] {", o, o.Type)
_ = fmtObjectProps(s)(&o)
_, _ = io.WriteString(s, " }")
} else if o.ID != "" {
_, _ = fmt.Fprintf(s, "%T { ", o)
_ = fmtObjectProps(s)(&o)
_, _ = io.WriteString(s, " }")
}
}
}
// Recipients performs recipient de-duplication on the Object's To, Bto, CC and BCC properties
func (o *Object) Recipients() ItemCollection {
aud := o.Audience
return ItemCollectionDeduplication(&o.To, &o.CC, &o.Bto, &o.BCC, &aud)
}
// Clean removes Bto and BCC properties
func (o *Object) Clean() {
o.BCC = o.BCC[:0]
o.Bto = o.Bto[:0]
CleanRecipients(o.Audience)
CleanRecipients(o.Attachment)
CleanRecipients(o.Icon)
CleanRecipients(o.Image)
CleanRecipients(o.Context)
CleanRecipients(o.Generator)
CleanRecipients(o.AttributedTo)
CleanRecipients(o.Preview)
CleanRecipients(o.Tag)
}
type (
// Article represents any kind of multi-paragraph written work.
Article = Object
// Audio represents an audio document of any kind.
Audio = Document
// Document represents a document of any kind.
Document = Object
// Event represents any kind of event.
Event = Object
// Image An image document of any kind
Image = Document
// Note represents a short written work typically less than a single paragraph in length.
Note = Object
// Page represents a Web Page.
Page = Document
// Video represents a video document of any kind
Video = Document
)
// UnmarshalJSON decodes an incoming JSON document into the receiver object.
func (m *MimeType) UnmarshalJSON(data []byte) error {
*m = MimeType(strings.Trim(string(data), "\""))
return nil
}
// MarshalJSON encodes the receiver object to a JSON document.
func (m MimeType) MarshalJSON() ([]byte, error) {
if len(m) == 0 {
return nil, nil
}
b := make([]byte, 0)
JSONWriteStringValue(&b, string(m))
return b, nil
}
// GobEncode
func (m MimeType) GobEncode() ([]byte, error) {
if len(m) == 0 {
return []byte{}, nil
}
b := bytes.Buffer{}
gg := gob.NewEncoder(&b)
if err := gobEncodeStringLikeType(gg, []byte(m)); err != nil {
return nil, err
}
return b.Bytes(), nil
}
// GobDecode
func (m *MimeType) GobDecode(data []byte) error {
if len(data) == 0 {
// NOTE(marius): this behaviour diverges from vanilla gob package
return nil
}
var bb []byte
if err := gob.NewDecoder(bytes.NewReader(data)).Decode(&bb); err != nil {
return err
}
*m = MimeType(bb)
return nil
}
// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface.
func (m *MimeType) UnmarshalBinary(data []byte) error {
return m.GobDecode(data)
}
// MarshalBinary implements the encoding.BinaryMarshaler interface.
func (m MimeType) MarshalBinary() ([]byte, error) {
return m.GobEncode()
}
// ToLink returns a Link pointer to the data in the current Item
func ToLink(it LinkOrIRI) (*Link, error) {
switch i := it.(type) {
case *Link:
return i, nil
case Link:
return &i, nil
}
return nil, fmt.Errorf("unable to convert %T to %T", it, new(Link))
}
// ToObject returns an Object pointer to the data in the current Item
// It relies on the fact that all the types in this package have a data layout compatible with Object.
func ToObject(it Item) (*Object, error) {
switch i := it.(type) {
case *Object:
return i, nil
case Object:
return &i, nil
case *Place:
return (*Object)(unsafe.Pointer(i)), nil
case Place:
return (*Object)(unsafe.Pointer(&i)), nil
case *Profile:
return (*Object)(unsafe.Pointer(i)), nil
case Profile:
return (*Object)(unsafe.Pointer(&i)), nil
case *Relationship:
return (*Object)(unsafe.Pointer(i)), nil
case Relationship:
return (*Object)(unsafe.Pointer(&i)), nil
case *Tombstone:
return (*Object)(unsafe.Pointer(i)), nil
case Tombstone:
return (*Object)(unsafe.Pointer(&i)), nil
case *Actor:
return (*Object)(unsafe.Pointer(i)), nil
case Actor:
return (*Object)(unsafe.Pointer(&i)), nil
case *Activity:
return (*Object)(unsafe.Pointer(i)), nil
case Activity:
return (*Object)(unsafe.Pointer(&i)), nil
case *IntransitiveActivity:
return (*Object)(unsafe.Pointer(i)), nil
case IntransitiveActivity:
return (*Object)(unsafe.Pointer(&i)), nil
case *Question:
return (*Object)(unsafe.Pointer(i)), nil
case Question:
return (*Object)(unsafe.Pointer(&i)), nil
case *Collection:
return (*Object)(unsafe.Pointer(i)), nil
case Collection:
return (*Object)(unsafe.Pointer(&i)), nil
case *CollectionPage:
return (*Object)(unsafe.Pointer(i)), nil
case CollectionPage:
return (*Object)(unsafe.Pointer(&i)), nil
case *OrderedCollection:
return (*Object)(unsafe.Pointer(i)), nil
case OrderedCollection:
return (*Object)(unsafe.Pointer(&i)), nil
case *OrderedCollectionPage:
return (*Object)(unsafe.Pointer(i)), nil
case OrderedCollectionPage:
return (*Object)(unsafe.Pointer(&i)), nil
default:
return reflectItemToType[Object](it)
}
}
func reflectItemToType[T Objects | Links](it Item) (*T, error) {
if IsNil(it) {
return nil, nil
}
tTyp := reflect.TypeFor[*T]()
if !reflect.TypeOf(it).ConvertibleTo(tTyp) {
return nil, ErrorInvalidType[T](it)
}
iVal := reflect.ValueOf(it)
if !iVal.IsValid() {
return nil, ErrorInvalidType[T](it)
}
if i, ok := iVal.Convert(tTyp).Interface().(*T); ok {
return i, nil
}
return nil, ErrorInvalidType[T](it)
}
// Source is intended to convey some sort of source from which the content markup was derived,
// as a form of provenance, or to support future editing by clients.
type Source struct {
// Content
Content NaturalLanguageValues `jsonld:"content"`
// MediaType
MediaType MimeType `jsonld:"mediaType"`
}
// GetAPSource
func GetAPSource(val *fastjson.Value) Source {
s := Source{}
if val == nil {
return s
}
if contBytes := val.Get("source", "content").GetStringBytes(); len(contBytes) > 0 {
s.Content.UnmarshalJSON(contBytes)
}
if mimeBytes := val.Get("source", "mediaType").GetStringBytes(); len(mimeBytes) > 0 {
s.MediaType.UnmarshalJSON(mimeBytes)
}
return s
}
// UnmarshalJSON decodes an incoming JSON document into the receiver object.
func (s *Source) UnmarshalJSON(data []byte) error {
p := fastjson.Parser{}
val, err := p.ParseBytes(data)
if err != nil {
return err
}
*s = GetAPSource(val)
return nil
}
// MarshalJSON encodes the receiver object to a JSON document.
func (s Source) MarshalJSON() ([]byte, error) {
b := make([]byte, 0)
empty := true
JSONWrite(&b, '{')
if len(s.MediaType) > 0 {
if v, err := s.MediaType.MarshalJSON(); err == nil && len(v) > 0 {
empty = !JSONWriteProp(&b, "mediaType", v)
}
}
if len(s.Content) > 0 {
empty = !JSONWriteNaturalLanguageProp(&b, "content", s.Content)
}
if !empty {
JSONWrite(&b, '}')
return b, nil
}
return nil, nil
}
// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface.
func (s *Source) UnmarshalBinary(data []byte) error {
return s.GobDecode(data)
}
// MarshalBinary implements the encoding.BinaryMarshaler interface.
func (s Source) MarshalBinary() ([]byte, error) {
return s.GobEncode()
}
// GobDecode
func (s *Source) GobDecode(data []byte) error {
if len(data) == 0 {
return nil
}
mm := make(map[string][]byte)
g := gob.NewDecoder(bytes.NewReader(data))
if err := g.Decode(&mm); err != nil {
return err
}
if raw, ok := mm["mediaType"]; ok {
if err := s.MediaType.GobDecode(raw); err != nil {
return err
}
}
if raw, ok := mm["content"]; ok {
if err := s.Content.GobDecode(raw); err != nil {
return err
}
}
return nil
}
// GobEncode
func (s Source) GobEncode() ([]byte, error) {
var (
mm = make(map[string][]byte)
err error
hasData bool
)
if len(s.MediaType) > 0 {
if mm["mediaType"], err = s.MediaType.GobEncode(); err != nil {
return nil, err
}
hasData = true
}
if len(s.Content) > 0 {
if mm["content"], err = s.Content.GobEncode(); err != nil {
return nil, err
}
hasData = true
}
if !hasData {
return []byte{}, nil
}
bb := bytes.Buffer{}
g := gob.NewEncoder(&bb)
if err := g.Encode(mm); err != nil {
return nil, err
}
return bb.Bytes(), nil
}
// Equals verifies if our receiver Object is equals with the "with" Object
func (o Object) Equals(with Item) bool {
if IsItemCollection(with) {
return false
}
if withID := with.GetID(); !o.ID.Equals(withID, true) {
return false
}
if withType := with.GetType(); !strings.EqualFold(string(o.Type), string(withType)) {
return false
}
if with.IsLink() && !with.GetLink().Equals(o.GetLink(), false) {
return false
}
result := true
err := OnObject(with, func(w *Object) error {
if len(w.Name) > 0 {
if !w.Name.Equals(o.Name) {
result = false
return nil
}
}
if len(w.Summary) > 0 {
if !w.Summary.Equals(o.Summary) {
result = false
return nil
}
}
if len(w.Content) > 0 {
if !w.Content.Equals(o.Content) {
result = false
return nil
}
}
if w.Attachment != nil {
if !ItemsEqual(o.Attachment, w.Attachment) {
result = false
return nil
}
}
if w.AttributedTo != nil {
if !ItemsEqual(o.AttributedTo, w.AttributedTo) {
result = false
return nil
}
}
if w.Audience != nil {
if !ItemsEqual(o.Audience, w.Audience) {
result = false
return nil
}
}
if w.Context != nil {
if !ItemsEqual(o.Context, w.Context) {
result = false
return nil
}
}
if w.Generator != nil {
if !ItemsEqual(o.Generator, w.Generator) {
result = false
return nil
}
}
if w.Icon != nil {
if !ItemsEqual(o.Icon, w.Icon) {
result = false
return nil
}
}
if w.Image != nil {
if !ItemsEqual(o.Image, w.Image) {
result = false
return nil
}
}
if w.InReplyTo != nil {
if !ItemsEqual(o.InReplyTo, w.InReplyTo) {
result = false
return nil
}
}
if w.Location != nil {
if !ItemsEqual(o.Location, w.Location) {
result = false
return nil
}
}
if w.Preview != nil {
if !ItemsEqual(o.Preview, w.Preview) {
result = false
return nil
}
}
if w.Replies != nil {
if !ItemsEqual(o.Replies, w.Replies) {
result = false
return nil
}
}
if w.Tag != nil {
if !ItemsEqual(o.Tag, w.Tag) {
result = false
return nil
}
}
if w.URL != nil {
if o.URL == nil {
result = false
return nil
}
if !w.URL.GetLink().Equals(o.URL.GetLink(), false) {
result = false
return nil
}
}
if w.To != nil {
if !ItemsEqual(o.To, w.To) {
result = false
return nil
}
}
if w.Bto != nil {
if !ItemsEqual(o.Bto, w.Bto) {
result = false
return nil
}
}
if w.CC != nil {
if !ItemsEqual(o.CC, w.CC) {
result = false
return nil
}
}
if w.BCC != nil {
if !ItemsEqual(o.BCC, w.BCC) {
result = false
return nil
}
}
if !w.Published.IsZero() {
if !w.Published.Equal(o.Published) {
result = false
return nil
}
}
if !w.Updated.IsZero() {
if !w.Updated.Equal(o.Updated) {
result = false
return nil
}
}
if !w.StartTime.IsZero() {
if !w.StartTime.Equal(o.StartTime) {
result = false
return nil
}
}
if !w.EndTime.IsZero() {
if !w.EndTime.Equal(o.EndTime) {
result = false
return nil
}
}
if w.Duration != 0 {
if w.Duration != o.Duration {
result = false
return nil
}
}
if w.Likes != nil {
if !ItemsEqual(o.Likes, w.Likes) {
result = false
return nil