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api_event.go
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api_event.go
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package bertyprotocol
import (
"berty.tech/berty/v2/go/internal/tracer"
"berty.tech/berty/v2/go/pkg/bertytypes"
"berty.tech/berty/v2/go/pkg/errcode"
"go.uber.org/zap"
)
// GroupMetadataSubscribe subscribes to the metadata events for a group
func (s *service) GroupMetadataSubscribe(req *bertytypes.GroupMetadataSubscribe_Request, sub ProtocolService_GroupMetadataSubscribeServer) error {
cg, err := s.getContextGroupForID(req.GroupPK)
if err != nil {
return errcode.ErrGroupMemberUnknownGroupID.Wrap(err)
}
// Subscribe for new metadatas
chSub := cg.MetadataStore().Subscribe(sub.Context())
// Get old metadatas and forward them to subscriber
sentDedup := map[string]bool{}
// TODO: add more granularity
if len(req.Since) > 0 {
for evt := range cg.MetadataStore().ListEvents(sub.Context()) {
if evt == nil {
continue
}
if err = sub.Send(evt); err != nil {
if sub.Context().Err() == nil {
cg.logger.Error("error while sending metadata", zap.Error(err))
}
return errcode.TODO.Wrap(err)
}
cg.logger.Info("service - metadata store - sent 1 event from log history")
sentDedup[string(evt.EventContext.ID)] = true
}
}
// Get new metadatas and forward them to subscriber
for evt := range chSub {
e, ok := evt.(*bertytypes.GroupMetadataEvent)
if !ok || sentDedup[string(e.EventContext.ID)] {
continue
}
if err := sub.Send(e); err != nil {
if sub.Context().Err() != nil {
return nil
}
cg.logger.Error("error while sending message", zap.Error(err))
return err
}
cg.logger.Info("service - metadata store - sent 1 event from log subscription")
}
return nil
}
// GroupMessageSubscribe subscribes to the message events for a group
func (s *service) GroupMessageSubscribe(req *bertytypes.GroupMessageSubscribe_Request, sub ProtocolService_GroupMessageSubscribeServer) error {
cg, err := s.getContextGroupForID(req.GroupPK)
if err != nil {
return errcode.ErrGroupMemberUnknownGroupID.Wrap(err)
}
// Subscribe for new messages
chSub := cg.MessageStore().Subscribe(sub.Context())
// Get old messages and forward them to subscriber
sentDedup := map[string]bool{}
// TODO: add more granularity
if len(req.Since) > 0 {
chList, err := cg.MessageStore().ListMessages(sub.Context())
if err != nil {
return errcode.TODO.Wrap(err)
}
for evt := range chList {
if err = sub.Send(evt); err != nil {
if sub.Context().Err() == nil {
cg.logger.Error("error while sending message", zap.Error(err))
}
return errcode.TODO.Wrap(err)
}
sentDedup[string(evt.EventContext.ID)] = true
}
}
// Get new messages and forward them to subscriber
for evt := range chSub {
e, ok := evt.(*bertytypes.GroupMessageEvent)
if !ok || sentDedup[string(e.EventContext.ID)] {
continue
}
_, span := tracer.SpanFromMessageHeaders(sub.Context(), e.Headers, "Receive Group Message")
err := sub.Send(e)
span.End()
if err != nil {
if sub.Context().Err() != nil {
return nil
}
cg.logger.Error("error while sending message", zap.Error(err))
return err
}
}
return nil
}
func (s *service) GroupMetadataList(req *bertytypes.GroupMetadataList_Request, sub ProtocolService_GroupMetadataListServer) error {
cg, err := s.getContextGroupForID(req.GroupPK)
if err != nil {
return errcode.ErrGroupMemberUnknownGroupID.Wrap(err)
}
for evt := range cg.MetadataStore().ListEvents(sub.Context()) {
if evt == nil {
continue
}
if err := sub.Send(evt); err != nil {
if sub.Context().Err() != nil {
return nil
}
cg.logger.Error("error while sending message", zap.Error(err))
}
}
return nil
}
func (s *service) GroupMessageList(req *bertytypes.GroupMessageList_Request, sub ProtocolService_GroupMessageListServer) error {
cg, err := s.getContextGroupForID(req.GroupPK)
if err != nil {
return errcode.ErrGroupMemberUnknownGroupID.Wrap(err)
}
messages, err := cg.MessageStore().ListMessages(sub.Context())
if err != nil {
return err
}
for evt := range messages {
if err := sub.Send(evt); err != nil {
if sub.Context().Err() != nil {
cg.logger.Error("context closed", zap.Error(err))
return nil
}
cg.logger.Error("error while sending message", zap.Error(err))
return err
}
}
return nil
}