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// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2018 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// Based on https://github.com/matrix-org/gomatrix/blob/master/sync.go
package matrix
import (
"encoding/json"
"fmt"
"runtime/debug"
"time"
"maunium.net/go/gomatrix"
"maunium.net/go/gomuks/matrix/rooms"
)
type SyncerSession interface {
GetRoom(id string) *rooms.Room
GetUserID() string
}
// 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 SyncerSession
listeners map[string][]gomatrix.OnEventListener // event type to listeners array
FirstSyncDone bool
}
// NewGomuksSyncer returns an instantiated GomuksSyncer
func NewGomuksSyncer(session SyncerSession) *GomuksSyncer {
return &GomuksSyncer{
Session: session,
listeners: make(map[string][]gomatrix.OnEventListener),
FirstSyncDone: false,
}
}
// ProcessResponse processes a Matrix sync response.
func (s *GomuksSyncer) ProcessResponse(res *gomatrix.RespSync, since string) (err error) {
if len(since) == 0 {
return
}
// debug.Print("Processing sync response", since, res)
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("ProcessResponse for %s since %s panicked: %s\n%s", s.Session.GetUserID(), since, r, debug.Stack())
}
}()
s.processSyncEvents(nil, res.Presence.Events, false, false)
s.processSyncEvents(nil, res.AccountData.Events, false, false)
for roomID, roomData := range res.Rooms.Join {
room := s.Session.GetRoom(roomID)
s.processSyncEvents(room, roomData.State.Events, true, false)
s.processSyncEvents(room, roomData.Timeline.Events, false, false)
s.processSyncEvents(room, roomData.Ephemeral.Events, false, false)
s.processSyncEvents(room, roomData.AccountData.Events, false, false)
if len(room.PrevBatch) == 0 {
room.PrevBatch = roomData.Timeline.PrevBatch
}
}
for roomID, roomData := range res.Rooms.Invite {
room := s.Session.GetRoom(roomID)
s.processSyncEvents(room, roomData.State.Events, true, false)
}
for roomID, roomData := range res.Rooms.Leave {
room := s.Session.GetRoom(roomID)
s.processSyncEvents(room, roomData.Timeline.Events, true, true)
if len(room.PrevBatch) == 0 {
room.PrevBatch = roomData.Timeline.PrevBatch
}
}
s.FirstSyncDone = true
return
}
func (s *GomuksSyncer) processSyncEvents(room *rooms.Room, events []*gomatrix.Event, isState bool, checkStateKey bool) {
for _, event := range events {
if !checkStateKey || event.StateKey != nil {
s.processSyncEvent(room, event, isState)
}
}
}
func (s *GomuksSyncer) processSyncEvent(room *rooms.Room, event *gomatrix.Event, isState bool) {
if room != nil {
event.RoomID = room.ID
}
if isState {
room.UpdateState(event)
}
s.notifyListeners(event)
}
// 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)
}
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": {
"include_leave": true,
"state": {
"types": ["m.room.member"]
},
"timeline": {
"types": ["m.room.message"],
"limit": 50
},
"ephemeral": {
"types": ["m.typing"]
},
"account_data": {
"types": ["m.tag"]
}
},
"account_data": {
"types": ["m.push_rules"]
},
"presence": {"types": []}
}`)
}
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