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