activity/streams/gen_json_resolver.go

997 行
26 KiB
Go

package streams
import (
"context"
"errors"
"fmt"
vocab "github.com/go-fed/activity/streams/vocab"
"strings"
)
// JSONResolver resolves a JSON-deserialized map into its concrete ActivityStreams
// type
type JSONResolver struct {
callbacks []interface{}
}
// NewJSONResolver creates a new Resolver that takes a JSON-deserialized generic
// map and determines the correct concrete Go type. The callback function is
// guaranteed to receive a value whose underlying ActivityStreams type matches
// the concrete interface name in its signature. The callback functions must
// be of the form:
//
// func(context.Context, <TypeInterface>) error
//
// where TypeInterface is the code-generated interface for an ActivityStream
// type. An error is returned if a callback function does not match this
// signature.
func NewJSONResolver(callbacks ...interface{}) (*JSONResolver, error) {
for _, cb := range callbacks {
// Each callback function must satisfy one known function signature, or else we will generate a runtime error instead of silently fail.
switch cb.(type) {
case func(context.Context, vocab.AcceptInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ActivityInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.AddInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.AnnounceInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ApplicationInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ArriveInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ArticleInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.AudioInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.BlockInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.CollectionInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.CollectionPageInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.CreateInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.DeleteInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.DislikeInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.DocumentInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.EventInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.FlagInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.FollowInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.GroupInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.IgnoreInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ImageInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.IntransitiveActivityInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.InviteInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.JoinInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.LeaveInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.LikeInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.LinkInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ListenInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.MentionInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.MoveInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.NoteInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ObjectInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.OfferInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.OrderedCollectionInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.OrderedCollectionPageInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.OrganizationInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.PageInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.PersonInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.PlaceInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ProfileInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.QuestionInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ReadInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.RejectInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.RelationshipInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.RemoveInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ServiceInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.TentativeAcceptInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.TentativeRejectInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.TombstoneInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.TravelInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.UndoInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.UpdateInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.VideoInterface) error:
// Do nothing, this callback has a correct signature.
case func(context.Context, vocab.ViewInterface) error:
// Do nothing, this callback has a correct signature.
default:
return nil, errors.New("a callback function is of the wrong signature and would never be called")
}
}
return &JSONResolver{callbacks: callbacks}, nil
}
// toAliasMap converts a JSONLD context into a map of vocabulary name to alias.
func toAliasMap(i interface{}) (m map[string]string) {
m = make(map[string]string)
toHttpHttpsFn := func(s string) (ok bool, http, https string) {
if strings.HasPrefix(s, "http://") {
ok = true
http = s
https = "https" + strings.TrimPrefix(s, "http")
} else if strings.HasPrefix(s, "https://") {
ok = true
https = s
http = "http" + strings.TrimPrefix(s, "https")
}
return
}
switch v := i.(type) {
case string:
// Single entry, no alias.
if ok, http, https := toHttpHttpsFn(v); ok {
m[http] = ""
m[https] = ""
} else {
m[v] = ""
}
case []interface{}:
// Recursively apply.
for _, elem := range v {
r := toAliasMap(elem)
for k, val := range r {
m[k] = val
}
}
case map[string]interface{}:
// Map any aliases.
for k, val := range v {
// Only handle string aliases.
switch conc := val.(type) {
case string:
m[k] = conc
}
}
}
return
}
// Resolve determines the ActivityStreams type of the payload, then applies the
// first callback function whose signature accepts the ActivityStreams value's
// type. This strictly assures that the callback function will only be passed
// ActivityStream objects whose type matches its interface. Returns an error
// if the ActivityStreams type does not match callbackers or is not a type
// handled by the generated code. If multiple types are present, it will check
// each one in order and apply only the first one. It returns an unhandled
// error for a multi-typed object if none of the types were able to be handled.
func (this JSONResolver) Resolve(ctx context.Context, m map[string]interface{}) error {
typeValue, ok := m["type"]
if !ok {
return fmt.Errorf("cannot determine ActivityStreams type: 'type' property is missing")
}
rawContext, ok := m["@context"]
if !ok {
return fmt.Errorf("cannot determine ActivityStreams type: '@context' is missing")
}
aliasMap := toAliasMap(rawContext)
// Begin: Private lambda to handle a single string "type" value. Makes code generation easier.
handleFn := func(typeString string) error {
switch typeString {
case "Accept":
v, err := mgr.DeserializeAcceptActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.AcceptInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Activity":
v, err := mgr.DeserializeActivityActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ActivityInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Add":
v, err := mgr.DeserializeAddActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.AddInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Announce":
v, err := mgr.DeserializeAnnounceActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.AnnounceInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Application":
v, err := mgr.DeserializeApplicationActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ApplicationInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Arrive":
v, err := mgr.DeserializeArriveActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ArriveInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Article":
v, err := mgr.DeserializeArticleActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ArticleInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Audio":
v, err := mgr.DeserializeAudioActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.AudioInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Block":
v, err := mgr.DeserializeBlockActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.BlockInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Collection":
v, err := mgr.DeserializeCollectionActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.CollectionInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "CollectionPage":
v, err := mgr.DeserializeCollectionPageActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.CollectionPageInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Create":
v, err := mgr.DeserializeCreateActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.CreateInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Delete":
v, err := mgr.DeserializeDeleteActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.DeleteInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Dislike":
v, err := mgr.DeserializeDislikeActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.DislikeInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Document":
v, err := mgr.DeserializeDocumentActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.DocumentInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Event":
v, err := mgr.DeserializeEventActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.EventInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Flag":
v, err := mgr.DeserializeFlagActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.FlagInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Follow":
v, err := mgr.DeserializeFollowActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.FollowInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Group":
v, err := mgr.DeserializeGroupActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.GroupInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Ignore":
v, err := mgr.DeserializeIgnoreActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.IgnoreInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Image":
v, err := mgr.DeserializeImageActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ImageInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "IntransitiveActivity":
v, err := mgr.DeserializeIntransitiveActivityActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.IntransitiveActivityInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Invite":
v, err := mgr.DeserializeInviteActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.InviteInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Join":
v, err := mgr.DeserializeJoinActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.JoinInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Leave":
v, err := mgr.DeserializeLeaveActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.LeaveInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Like":
v, err := mgr.DeserializeLikeActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.LikeInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Link":
v, err := mgr.DeserializeLinkActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.LinkInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Listen":
v, err := mgr.DeserializeListenActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ListenInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Mention":
v, err := mgr.DeserializeMentionActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.MentionInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Move":
v, err := mgr.DeserializeMoveActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.MoveInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Note":
v, err := mgr.DeserializeNoteActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.NoteInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Object":
v, err := mgr.DeserializeObjectActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ObjectInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Offer":
v, err := mgr.DeserializeOfferActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.OfferInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "OrderedCollection":
v, err := mgr.DeserializeOrderedCollectionActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.OrderedCollectionInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "OrderedCollectionPage":
v, err := mgr.DeserializeOrderedCollectionPageActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.OrderedCollectionPageInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Organization":
v, err := mgr.DeserializeOrganizationActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.OrganizationInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Page":
v, err := mgr.DeserializePageActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.PageInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Person":
v, err := mgr.DeserializePersonActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.PersonInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Place":
v, err := mgr.DeserializePlaceActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.PlaceInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Profile":
v, err := mgr.DeserializeProfileActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ProfileInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Question":
v, err := mgr.DeserializeQuestionActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.QuestionInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Read":
v, err := mgr.DeserializeReadActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ReadInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Reject":
v, err := mgr.DeserializeRejectActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.RejectInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Relationship":
v, err := mgr.DeserializeRelationshipActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.RelationshipInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Remove":
v, err := mgr.DeserializeRemoveActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.RemoveInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Service":
v, err := mgr.DeserializeServiceActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ServiceInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "TentativeAccept":
v, err := mgr.DeserializeTentativeAcceptActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.TentativeAcceptInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "TentativeReject":
v, err := mgr.DeserializeTentativeRejectActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.TentativeRejectInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Tombstone":
v, err := mgr.DeserializeTombstoneActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.TombstoneInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Travel":
v, err := mgr.DeserializeTravelActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.TravelInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Undo":
v, err := mgr.DeserializeUndoActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.UndoInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Update":
v, err := mgr.DeserializeUpdateActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.UpdateInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "Video":
v, err := mgr.DeserializeVideoActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.VideoInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
case "View":
v, err := mgr.DeserializeViewActivityStreams()(m, aliasMap)
if err != nil {
return err
}
for _, i := range this.callbacks {
if fn, ok := i.(func(context.Context, vocab.ViewInterface) error); ok {
return fn(ctx, v)
}
}
return ErrNoCallbackMatch
default:
return ErrUnhandledType
}
}
// End: Private lambda
if typeStr, ok := typeValue.(string); ok {
return handleFn(typeStr)
} else if typeIArr, ok := typeValue.([]interface{}); ok {
for _, typeI := range typeIArr {
if typeStr, ok := typeI.(string); ok {
if err := handleFn(typeStr); err == nil {
return nil
} else if err == ErrUnhandledType {
// Keep trying other types: only if all fail do we return this error.
continue
} else {
return err
}
}
}
return ErrUnhandledType
} else {
return ErrUnhandledType
}
}