122 lines
3.9 KiB
Go
122 lines
3.9 KiB
Go
// Copyright 2022 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consumers
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import (
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"context"
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"encoding/json"
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"strconv"
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"github.com/matrix-org/dendrite/federationapi/queue"
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"github.com/matrix-org/dendrite/federationapi/storage"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/dendrite/setup/jetstream"
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"github.com/matrix-org/dendrite/setup/process"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/gomatrixserverlib/spec"
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"github.com/nats-io/nats.go"
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log "github.com/sirupsen/logrus"
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)
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// OutputTypingConsumer consumes events that originate in the clientapi.
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type OutputTypingConsumer struct {
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ctx context.Context
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jetstream nats.JetStreamContext
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durable string
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db storage.Database
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queues *queue.OutgoingQueues
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isLocalServerName func(spec.ServerName) bool
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topic string
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}
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// NewOutputTypingConsumer creates a new OutputTypingConsumer. Call Start() to begin consuming typing events.
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func NewOutputTypingConsumer(
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process *process.ProcessContext,
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cfg *config.FederationAPI,
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js nats.JetStreamContext,
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queues *queue.OutgoingQueues,
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store storage.Database,
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) *OutputTypingConsumer {
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return &OutputTypingConsumer{
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ctx: process.Context(),
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jetstream: js,
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queues: queues,
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db: store,
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isLocalServerName: cfg.Matrix.IsLocalServerName,
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durable: cfg.Matrix.JetStream.Durable("FederationAPITypingConsumer"),
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topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputTypingEvent),
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}
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}
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// Start consuming from the clientapi
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func (t *OutputTypingConsumer) Start() error {
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return jetstream.JetStreamConsumer(
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t.ctx, t.jetstream, t.topic, t.durable, 1, t.onMessage,
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nats.DeliverAll(), nats.ManualAck(), nats.HeadersOnly(),
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)
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}
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// onMessage is called in response to a message received on the typing
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// events topic from the client api.
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func (t *OutputTypingConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
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msg := msgs[0] // Guaranteed to exist if onMessage is called
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// Extract the typing event from msg.
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roomID := msg.Header.Get(jetstream.RoomID)
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userID := msg.Header.Get(jetstream.UserID)
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typing, err := strconv.ParseBool(msg.Header.Get("typing"))
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if err != nil {
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log.WithError(err).Errorf("EDU output log: typing parse failure")
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return true
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}
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// only send typing events which originated from us
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_, typingServerName, err := gomatrixserverlib.SplitID('@', userID)
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if err != nil {
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log.WithError(err).WithField("user_id", userID).Error("Failed to extract domain from typing sender")
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_ = msg.Ack()
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return true
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}
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if !t.isLocalServerName(typingServerName) {
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return true
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}
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joined, err := t.db.GetJoinedHosts(ctx, roomID)
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if err != nil {
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log.WithError(err).WithField("room_id", roomID).Error("failed to get joined hosts for room")
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return false
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}
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names := make([]spec.ServerName, len(joined))
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for i := range joined {
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names[i] = joined[i].ServerName
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}
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edu := &gomatrixserverlib.EDU{Type: "m.typing"}
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if edu.Content, err = json.Marshal(map[string]interface{}{
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"room_id": roomID,
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"user_id": userID,
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"typing": typing,
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}); err != nil {
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log.WithError(err).Error("failed to marshal EDU JSON")
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return true
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}
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if err := t.queues.SendEDU(edu, typingServerName, names); err != nil {
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log.WithError(err).Error("failed to send EDU")
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return false
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}
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return true
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}
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