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package streams
import (
"context"
"encoding/json"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
)
type ReceiptStreamProvider struct {
DefaultStreamProvider
}
func (p *ReceiptStreamProvider) Setup(
ctx context.Context, snapshot storage.DatabaseTransaction,
) {
p.DefaultStreamProvider.Setup(ctx, snapshot)
p.latestMutex.Lock()
defer p.latestMutex.Unlock()
id, err := snapshot.MaxStreamPositionForReceipts(ctx)
if err != nil {
panic(err)
}
p.latest = id
}
func (p *ReceiptStreamProvider) CompleteSync(
ctx context.Context,
snapshot storage.DatabaseTransaction,
req *types.SyncRequest,
) types.StreamPosition {
return p.IncrementalSync(ctx, snapshot, req, 0, p.LatestPosition(ctx))
}
func (p *ReceiptStreamProvider) IncrementalSync(
ctx context.Context,
snapshot storage.DatabaseTransaction,
req *types.SyncRequest,
from, to types.StreamPosition,
) types.StreamPosition {
var joinedRooms []string
for roomID, membership := range req.Rooms {
if membership == gomatrixserverlib.Join {
joinedRooms = append(joinedRooms, roomID)
}
}
lastPos, receipts, err := snapshot.RoomReceiptsAfter(ctx, joinedRooms, from)
if err != nil {
req.Log.WithError(err).Error("p.DB.RoomReceiptsAfter failed")
return from
}
if len(receipts) == 0 || lastPos == 0 {
return to
}
// Group receipts by room, so we can create one ClientEvent for every room
receiptsByRoom := make(map[string][]types.OutputReceiptEvent)
for _, receipt := range receipts {
// skip ignored user events
if _, ok := req.IgnoredUsers.List[receipt.UserID]; ok {
continue
}
receiptsByRoom[receipt.RoomID] = append(receiptsByRoom[receipt.RoomID], receipt)
}
for roomID, receipts := range receiptsByRoom {
// For a complete sync, make sure we're only including this room if
// that room was present in the joined rooms.
if from == 0 && !req.IsRoomPresent(roomID) {
continue
}
jr := *types.NewJoinResponse()
if existing, ok := req.Response.Rooms.Join[roomID]; ok {
jr = existing
}
ev := gomatrixserverlib.ClientEvent{
Type: gomatrixserverlib.MReceipt,
RoomID: roomID,
}
content := make(map[string]ReceiptMRead)
for _, receipt := range receipts {
read, ok := content[receipt.EventID]
if !ok {
read = ReceiptMRead{
User: make(map[string]ReceiptTS),
}
}
read.User[receipt.UserID] = ReceiptTS{TS: receipt.Timestamp}
content[receipt.EventID] = read
}
ev.Content, err = json.Marshal(content)
if err != nil {
req.Log.WithError(err).Error("json.Marshal failed")
return from
}
jr.Ephemeral.Events = append(jr.Ephemeral.Events, ev)
req.Response.Rooms.Join[roomID] = jr
}
return lastPos
}
type ReceiptMRead struct {
User map[string]ReceiptTS `json:"m.read"`
}
type ReceiptTS struct {
TS gomatrixserverlib.Timestamp `json:"ts"`
}
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