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// 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/common"
"github.com/matrix-org/dendrite/common/config"
"github.com/matrix-org/dendrite/eduserver/api"
"github.com/matrix-org/dendrite/federationsender/queue"
"github.com/matrix-org/dendrite/federationsender/storage"
"github.com/matrix-org/gomatrixserverlib"
log "github.com/sirupsen/logrus"
)
// OutputTypingEventConsumer consumes events that originate in EDU server.
type OutputTypingEventConsumer struct {
consumer *common.ContinualConsumer
db storage.Database
queues *queue.OutgoingQueues
ServerName gomatrixserverlib.ServerName
}
// NewOutputTypingEventConsumer creates a new OutputTypingEventConsumer. Call Start() to begin consuming from EDU servers.
func NewOutputTypingEventConsumer(
cfg *config.Dendrite,
kafkaConsumer sarama.Consumer,
queues *queue.OutgoingQueues,
store storage.Database,
) *OutputTypingEventConsumer {
consumer := common.ContinualConsumer{
Topic: string(cfg.Kafka.Topics.OutputTypingEvent),
Consumer: kafkaConsumer,
PartitionStore: store,
}
c := &OutputTypingEventConsumer{
consumer: &consumer,
queues: queues,
db: store,
ServerName: cfg.Matrix.ServerName,
}
consumer.ProcessMessage = c.onMessage
return c
}
// Start consuming from EDU servers
func (t *OutputTypingEventConsumer) Start() error {
return t.consumer.Start()
}
// onMessage is called for OutputTypingEvent received from the EDU servers.
// Parses the msg, creates a matrix federation EDU and sends it to joined hosts.
func (t *OutputTypingEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
// Extract the typing event from msg.
var ote api.OutputTypingEvent
if err := json.Unmarshal(msg.Value, &ote); err != nil {
// Skip this msg but continue processing messages.
log.WithError(err).Errorf("eduserver output log: message parse failed")
return nil
}
// only send typing events which originated from us
_, typingServerName, err := gomatrixserverlib.SplitID('@', ote.Event.UserID)
if err != nil {
log.WithError(err).WithField("user_id", ote.Event.UserID).Error("Failed to extract domain from typing sender")
return nil
}
if typingServerName != t.ServerName {
log.WithField("other_server", typingServerName).Info("Suppressing typing notif: originated elsewhere")
return nil
}
joined, err := t.db.GetJoinedHosts(context.TODO(), ote.Event.RoomID)
if err != nil {
return err
}
names := make([]gomatrixserverlib.ServerName, len(joined))
for i := range joined {
names[i] = joined[i].ServerName
}
edu := &gomatrixserverlib.EDU{Type: ote.Event.Type}
if edu.Content, err = json.Marshal(map[string]interface{}{
"room_id": ote.Event.RoomID,
"user_id": ote.Event.UserID,
"typing": ote.Event.Typing,
}); err != nil {
return err
}
return t.queues.SendEDU(edu, t.ServerName, names)
}
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