1 files changed, 119 insertions, 0 deletions
diff --git a/syncapi/consumers/sendtodevice.go b/syncapi/consumers/sendtodevice.go
new file mode 100644
index 00000000..0b9153fc
--- /dev/null
+++ b/syncapi/consumers/sendtodevice.go
@@ -0,0 +1,119 @@
+// Copyright 2020 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package consumers
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/getsentry/sentry-go"
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/matrix-org/dendrite/setup/jetstream"
+	"github.com/matrix-org/dendrite/setup/process"
+	"github.com/matrix-org/dendrite/syncapi/notifier"
+	"github.com/matrix-org/dendrite/syncapi/storage"
+	"github.com/matrix-org/dendrite/syncapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+	"github.com/nats-io/nats.go"
+	log "github.com/sirupsen/logrus"
+)
+
+// OutputSendToDeviceEventConsumer consumes events that originated in the EDU server.
+type OutputSendToDeviceEventConsumer struct {
+	ctx        context.Context
+	jetstream  nats.JetStreamContext
+	durable    string
+	topic      string
+	db         storage.Database
+	serverName gomatrixserverlib.ServerName // our server name
+	stream     types.StreamProvider
+	notifier   *notifier.Notifier
+}
+
+// NewOutputSendToDeviceEventConsumer creates a new OutputSendToDeviceEventConsumer.
+// Call Start() to begin consuming from the EDU server.
+func NewOutputSendToDeviceEventConsumer(
+	process *process.ProcessContext,
+	cfg *config.SyncAPI,
+	js nats.JetStreamContext,
+	store storage.Database,
+	notifier *notifier.Notifier,
+	stream types.StreamProvider,
+) *OutputSendToDeviceEventConsumer {
+	return &OutputSendToDeviceEventConsumer{
+		ctx:        process.Context(),
+		jetstream:  js,
+		topic:      cfg.Matrix.JetStream.Prefixed(jetstream.OutputSendToDeviceEvent),
+		durable:    cfg.Matrix.JetStream.Durable("SyncAPISendToDeviceConsumer"),
+		db:         store,
+		serverName: cfg.Matrix.ServerName,
+		notifier:   notifier,
+		stream:     stream,
+	}
+}
+
+// Start consuming send-to-device events.
+func (s *OutputSendToDeviceEventConsumer) Start() error {
+	return jetstream.JetStreamConsumer(
+		s.ctx, s.jetstream, s.topic, s.durable, s.onMessage,
+		nats.DeliverAll(), nats.ManualAck(),
+	)
+}
+
+func (s *OutputSendToDeviceEventConsumer) onMessage(ctx context.Context, msg *nats.Msg) bool {
+	userID := msg.Header.Get(jetstream.UserID)
+	_, domain, err := gomatrixserverlib.SplitID('@', userID)
+	if err != nil {
+		sentry.CaptureException(err)
+		return true
+	}
+	if domain != s.serverName {
+		return true
+	}
+
+	var output types.OutputSendToDeviceEvent
+	if err = json.Unmarshal(msg.Data, &output); err != nil {
+		// If the message was invalid, log it and move on to the next message in the stream
+		log.WithError(err).Errorf("output log: message parse failure")
+		sentry.CaptureException(err)
+		return true
+	}
+
+	util.GetLogger(context.TODO()).WithFields(log.Fields{
+		"sender":     output.Sender,
+		"user_id":    output.UserID,
+		"device_id":  output.DeviceID,
+		"event_type": output.Type,
+	}).Debugf("sync API received send-to-device event from the clientapi/federationsender")
+
+	streamPos, err := s.db.StoreNewSendForDeviceMessage(
+		s.ctx, output.UserID, output.DeviceID, output.SendToDeviceEvent,
+	)
+	if err != nil {
+		sentry.CaptureException(err)
+		log.WithError(err).Errorf("failed to store send-to-device message")
+		return false
+	}
+
+	s.stream.Advance(streamPos)
+	s.notifier.OnNewSendToDevice(
+		output.UserID,
+		[]string{output.DeviceID},
+		types.StreamingToken{SendToDevicePosition: streamPos},
+	)
+
+	return true
+}