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package matrix
import (
"encoding/json"
"fmt"
"runtime/debug"
"time"
"maunium.net/go/gomatrix"
"maunium.net/go/gomuks/config"
)
// GomuksSyncer is the default syncing implementation. You can either write your own syncer, or selectively
// replace parts of this default syncer (e.g. the ProcessResponse method). The default syncer uses the observer
// pattern to notify callers about incoming events. See GomuksSyncer.OnEventType for more information.
type GomuksSyncer struct {
Session *config.Session
listeners map[string][]gomatrix.OnEventListener // event type to listeners array
}
// NewGomuksSyncer returns an instantiated GomuksSyncer
func NewGomuksSyncer(session *config.Session) *GomuksSyncer {
return &GomuksSyncer{
Session: session,
listeners: make(map[string][]gomatrix.OnEventListener),
}
}
func (s *GomuksSyncer) ProcessResponse(res *gomatrix.RespSync, since string) (err error) {
if !s.shouldProcessResponse(res, since) {
return
}
// gdebug.Print("Processing sync response", since, res)
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("ProcessResponse panicked! userID=%s since=%s panic=%s\n%s", s.Session.MXID, since, r, debug.Stack())
}
}()
for _, event := range res.Presence.Events {
s.notifyListeners(event)
}
for roomID, roomData := range res.Rooms.Join {
room := s.Session.GetRoom(roomID)
for _, event := range roomData.State.Events {
event.RoomID = roomID
room.UpdateState(event)
s.notifyListeners(event)
}
for _, event := range roomData.Timeline.Events {
event.RoomID = roomID
s.notifyListeners(event)
}
for _, event := range roomData.Ephemeral.Events {
event.RoomID = roomID
s.notifyListeners(event)
}
if len(room.PrevBatch) == 0 {
room.PrevBatch = roomData.Timeline.PrevBatch
}
}
for roomID, roomData := range res.Rooms.Invite {
room := s.Session.GetRoom(roomID)
for _, event := range roomData.State.Events {
event.RoomID = roomID
room.UpdateState(event)
s.notifyListeners(event)
}
}
for roomID, roomData := range res.Rooms.Leave {
room := s.Session.GetRoom(roomID)
for _, event := range roomData.Timeline.Events {
if event.StateKey != nil {
event.RoomID = roomID
room.UpdateState(event)
s.notifyListeners(event)
}
}
if len(room.PrevBatch) == 0 {
room.PrevBatch = roomData.Timeline.PrevBatch
}
}
return
}
// OnEventType allows callers to be notified when there are new events for the given event type.
// There are no duplicate checks.
func (s *GomuksSyncer) OnEventType(eventType string, callback gomatrix.OnEventListener) {
_, exists := s.listeners[eventType]
if !exists {
s.listeners[eventType] = []gomatrix.OnEventListener{}
}
s.listeners[eventType] = append(s.listeners[eventType], callback)
}
// shouldProcessResponse returns true if the response should be processed. May modify the response to remove
// stuff that shouldn't be processed.
func (s *GomuksSyncer) shouldProcessResponse(resp *gomatrix.RespSync, since string) bool {
if since == "" {
return false
}
return true
}
func (s *GomuksSyncer) notifyListeners(event *gomatrix.Event) {
listeners, exists := s.listeners[event.Type]
if !exists {
return
}
for _, fn := range listeners {
fn(event)
}
}
// OnFailedSync always returns a 10 second wait period between failed /syncs, never a fatal error.
func (s *GomuksSyncer) OnFailedSync(res *gomatrix.RespSync, err error) (time.Duration, error) {
return 10 * time.Second, nil
}
// GetFilterJSON returns a filter with a timeline limit of 50.
func (s *GomuksSyncer) GetFilterJSON(userID string) json.RawMessage {
return json.RawMessage(`{"room":{"timeline":{"limit":50}}}`)
}
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