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// 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/Shopify/sarama"
"github.com/matrix-org/dendrite/eduserver/api"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/sync"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
log "github.com/sirupsen/logrus"
)
// OutputSendToDeviceEventConsumer consumes events that originated in the EDU server.
type OutputSendToDeviceEventConsumer struct {
sendToDeviceConsumer *internal.ContinualConsumer
db storage.Database
serverName gomatrixserverlib.ServerName // our server name
notifier *sync.Notifier
}
// NewOutputSendToDeviceEventConsumer creates a new OutputSendToDeviceEventConsumer.
// Call Start() to begin consuming from the EDU server.
func NewOutputSendToDeviceEventConsumer(
cfg *config.SyncAPI,
kafkaConsumer sarama.Consumer,
n *sync.Notifier,
store storage.Database,
) *OutputSendToDeviceEventConsumer {
consumer := internal.ContinualConsumer{
Topic: string(cfg.Matrix.Kafka.Topics.OutputSendToDeviceEvent),
Consumer: kafkaConsumer,
PartitionStore: store,
}
s := &OutputSendToDeviceEventConsumer{
sendToDeviceConsumer: &consumer,
db: store,
serverName: cfg.Matrix.ServerName,
notifier: n,
}
consumer.ProcessMessage = s.onMessage
return s
}
// Start consuming from EDU api
func (s *OutputSendToDeviceEventConsumer) Start() error {
return s.sendToDeviceConsumer.Start()
}
func (s *OutputSendToDeviceEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
var output api.OutputSendToDeviceEvent
if err := json.Unmarshal(msg.Value, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("EDU server output log: message parse failure")
return err
}
_, domain, err := gomatrixserverlib.SplitID('@', output.UserID)
if err != nil {
return err
}
if domain != s.serverName {
return nil
}
util.GetLogger(context.TODO()).WithFields(log.Fields{
"sender": output.Sender,
"user_id": output.UserID,
"device_id": output.DeviceID,
"event_type": output.Type,
}).Info("sync API received send-to-device event from EDU server")
streamPos := s.db.AddSendToDevice()
_, err = s.db.StoreNewSendForDeviceMessage(
context.TODO(), streamPos, output.UserID, output.DeviceID, output.SendToDeviceEvent,
)
if err != nil {
log.WithError(err).Errorf("failed to store send-to-device message")
return err
}
s.notifier.OnNewSendToDevice(
output.UserID,
[]string{output.DeviceID},
types.NewStreamToken(0, streamPos, nil),
)
return nil
}
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