forked from mirrors/gotosocial
100 lines
3.1 KiB
Go
100 lines
3.1 KiB
Go
package streaming
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
|
"github.com/superseriousbusiness/gotosocial/internal/id"
|
|
)
|
|
|
|
func (p *processor) OpenStreamForAccount(account *gtsmodel.Account, streamType string) (*gtsmodel.Stream, gtserror.WithCode) {
|
|
l := p.log.WithFields(logrus.Fields{
|
|
"func": "OpenStreamForAccount",
|
|
"account": account.ID,
|
|
"streamType": streamType,
|
|
})
|
|
l.Debug("received open stream request")
|
|
|
|
// each stream needs a unique ID so we know to close it
|
|
streamID, err := id.NewRandomULID()
|
|
if err != nil {
|
|
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error generating stream id: %s", err))
|
|
}
|
|
|
|
thisStream := >smodel.Stream{
|
|
ID: streamID,
|
|
Type: streamType,
|
|
Messages: make(chan *gtsmodel.Message, 100),
|
|
Hangup: make(chan interface{}, 1),
|
|
Connected: true,
|
|
}
|
|
go p.waitToCloseStream(account, thisStream)
|
|
|
|
v, ok := p.streamMap.Load(account.ID)
|
|
if !ok || v == nil {
|
|
// there is no entry in the streamMap for this account yet, so make one and store it
|
|
streamsForAccount := >smodel.StreamsForAccount{
|
|
Streams: []*gtsmodel.Stream{
|
|
thisStream,
|
|
},
|
|
}
|
|
p.streamMap.Store(account.ID, streamsForAccount)
|
|
} else {
|
|
// there is an entry in the streamMap for this account
|
|
// parse the interface as a streamsForAccount
|
|
streamsForAccount, ok := v.(*gtsmodel.StreamsForAccount)
|
|
if !ok {
|
|
return nil, gtserror.NewErrorInternalError(errors.New("stream map error"))
|
|
}
|
|
|
|
// append this stream to it
|
|
streamsForAccount.Lock()
|
|
streamsForAccount.Streams = append(streamsForAccount.Streams, thisStream)
|
|
streamsForAccount.Unlock()
|
|
}
|
|
|
|
return thisStream, nil
|
|
}
|
|
|
|
// waitToCloseStream waits until the hangup channel is closed for the given stream.
|
|
// It then iterates through the map of streams stored by the processor, removes the stream from it,
|
|
// and then closes the messages channel of the stream to indicate that the channel should no longer be read from.
|
|
func (p *processor) waitToCloseStream(account *gtsmodel.Account, thisStream *gtsmodel.Stream) {
|
|
<-thisStream.Hangup // wait for a hangup message
|
|
|
|
// lock the stream to prevent more messages being put in it while we work
|
|
thisStream.Lock()
|
|
defer thisStream.Unlock()
|
|
|
|
// indicate the stream is no longer connected
|
|
thisStream.Connected = false
|
|
|
|
// load and parse the entry for this account from the stream map
|
|
v, ok := p.streamMap.Load(account.ID)
|
|
if !ok || v == nil {
|
|
return
|
|
}
|
|
streamsForAccount, ok := v.(*gtsmodel.StreamsForAccount)
|
|
if !ok {
|
|
return
|
|
}
|
|
|
|
// lock the streams for account while we remove this stream from its slice
|
|
streamsForAccount.Lock()
|
|
defer streamsForAccount.Unlock()
|
|
|
|
// put everything into modified streams *except* the stream we're removing
|
|
modifiedStreams := []*gtsmodel.Stream{}
|
|
for _, s := range streamsForAccount.Streams {
|
|
if s.ID != thisStream.ID {
|
|
modifiedStreams = append(modifiedStreams, s)
|
|
}
|
|
}
|
|
streamsForAccount.Streams = modifiedStreams
|
|
|
|
// finally close the messages channel so no more messages can be read from it
|
|
close(thisStream.Messages)
|
|
}
|