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// Copyright 2019 Alex Chen
//
// 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"
"strconv"
"time"
"github.com/matrix-org/dendrite/internal/caching"
"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/streams"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/nats-io/nats.go"
log "github.com/sirupsen/logrus"
)
// OutputTypingEventConsumer consumes events that originated in the EDU server.
type OutputTypingEventConsumer struct {
ctx context.Context
jetstream nats.JetStreamContext
durable string
topic string
eduCache *caching.EDUCache
stream streams.StreamProvider
notifier *notifier.Notifier
}
// NewOutputTypingEventConsumer creates a new OutputTypingEventConsumer.
// Call Start() to begin consuming from the EDU server.
func NewOutputTypingEventConsumer(
process *process.ProcessContext,
cfg *config.SyncAPI,
js nats.JetStreamContext,
eduCache *caching.EDUCache,
notifier *notifier.Notifier,
stream streams.StreamProvider,
) *OutputTypingEventConsumer {
return &OutputTypingEventConsumer{
ctx: process.Context(),
jetstream: js,
topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputTypingEvent),
durable: cfg.Matrix.JetStream.Durable("SyncAPITypingConsumer"),
eduCache: eduCache,
notifier: notifier,
stream: stream,
}
}
// Start consuming typing events.
func (s *OutputTypingEventConsumer) Start() error {
return jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, 1,
s.onMessage, nats.DeliverAll(), nats.ManualAck(),
)
}
func (s *OutputTypingEventConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
msg := msgs[0] // Guaranteed to exist if onMessage is called
roomID := msg.Header.Get(jetstream.RoomID)
userID := msg.Header.Get(jetstream.UserID)
typing, err := strconv.ParseBool(msg.Header.Get("typing"))
if err != nil {
log.WithError(err).Errorf("output log: typing parse failure")
return true
}
timeout, err := strconv.Atoi(msg.Header.Get("timeout_ms"))
if err != nil {
log.WithError(err).Errorf("output log: timeout_ms parse failure")
return true
}
log.WithFields(log.Fields{
"room_id": roomID,
"user_id": userID,
"typing": typing,
"timeout": timeout,
}).Debug("syncapi received EDU data from client api")
var typingPos types.StreamPosition
if typing {
expiry := time.Now().Add(time.Duration(timeout) * time.Millisecond)
typingPos = types.StreamPosition(
s.eduCache.AddTypingUser(userID, roomID, &expiry),
)
} else {
typingPos = types.StreamPosition(
s.eduCache.RemoveUser(userID, roomID),
)
}
s.stream.Advance(typingPos)
s.notifier.OnNewTyping(roomID, types.StreamingToken{TypingPosition: typingPos})
return true
}
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