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// Copyright 2024 New Vector Ltd.
// Copyright 2017 Vector Creations Ltd
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
// Please see LICENSE files in the repository root for full details.
package producers
import (
"context"
"encoding/json"
"fmt"
"strconv"
"time"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/nats-io/nats.go"
log "github.com/sirupsen/logrus"
"github.com/element-hq/dendrite/setup/jetstream"
"github.com/element-hq/dendrite/syncapi/types"
userapi "github.com/element-hq/dendrite/userapi/api"
)
// SyncAPIProducer produces events for the sync API server to consume
type SyncAPIProducer struct {
TopicReceiptEvent string
TopicSendToDeviceEvent string
TopicTypingEvent string
TopicPresenceEvent string
JetStream nats.JetStreamContext
ServerName spec.ServerName
UserAPI userapi.ClientUserAPI
}
func (p *SyncAPIProducer) SendReceipt(
ctx context.Context,
userID, roomID, eventID, receiptType string, timestamp spec.Timestamp,
) error {
m := &nats.Msg{
Subject: p.TopicReceiptEvent,
Header: nats.Header{},
}
m.Header.Set(jetstream.UserID, userID)
m.Header.Set(jetstream.RoomID, roomID)
m.Header.Set(jetstream.EventID, eventID)
m.Header.Set("type", receiptType)
m.Header.Set("timestamp", fmt.Sprintf("%d", timestamp))
log.WithFields(log.Fields{}).Tracef("Producing to topic '%s'", p.TopicReceiptEvent)
_, err := p.JetStream.PublishMsg(m, nats.Context(ctx))
return err
}
func (p *SyncAPIProducer) SendToDevice(
ctx context.Context, sender, userID, deviceID, eventType string,
message json.RawMessage,
) error {
devices := []string{}
_, domain, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
return err
}
// If the event is targeted locally then we want to expand the wildcard
// out into individual device IDs so that we can send them to each respective
// device. If the event isn't targeted locally then we can't expand the
// wildcard as we don't know about the remote devices, so instead we leave it
// as-is, so that the federation sender can send it on with the wildcard intact.
if domain == p.ServerName && deviceID == "*" {
var res userapi.QueryDevicesResponse
err = p.UserAPI.QueryDevices(context.TODO(), &userapi.QueryDevicesRequest{
UserID: userID,
}, &res)
if err != nil {
return err
}
for _, dev := range res.Devices {
devices = append(devices, dev.ID)
}
} else {
devices = append(devices, deviceID)
}
log.WithFields(log.Fields{
"user_id": userID,
"num_devices": len(devices),
"type": eventType,
}).Tracef("Producing to topic '%s'", p.TopicSendToDeviceEvent)
for i, device := range devices {
ote := &types.OutputSendToDeviceEvent{
UserID: userID,
DeviceID: device,
SendToDeviceEvent: gomatrixserverlib.SendToDeviceEvent{
Sender: sender,
Type: eventType,
Content: message,
},
}
eventJSON, err := json.Marshal(ote)
if err != nil {
log.WithError(err).Error("sendToDevice failed json.Marshal")
return err
}
m := nats.NewMsg(p.TopicSendToDeviceEvent)
m.Data = eventJSON
m.Header.Set("sender", sender)
m.Header.Set(jetstream.UserID, userID)
if _, err = p.JetStream.PublishMsg(m, nats.Context(ctx)); err != nil {
if i < len(devices)-1 {
log.WithError(err).Warn("sendToDevice failed to PublishMsg, trying further devices")
continue
}
log.WithError(err).Error("sendToDevice failed to PublishMsg for all devices")
return err
}
}
return nil
}
func (p *SyncAPIProducer) SendTyping(
ctx context.Context, userID, roomID string, typing bool, timeoutMS int64,
) error {
m := &nats.Msg{
Subject: p.TopicTypingEvent,
Header: nats.Header{},
}
m.Header.Set(jetstream.UserID, userID)
m.Header.Set(jetstream.RoomID, roomID)
m.Header.Set("typing", strconv.FormatBool(typing))
m.Header.Set("timeout_ms", strconv.Itoa(int(timeoutMS)))
_, err := p.JetStream.PublishMsg(m, nats.Context(ctx))
return err
}
func (p *SyncAPIProducer) SendPresence(
ctx context.Context, userID string, presence types.Presence, statusMsg *string,
) error {
m := nats.NewMsg(p.TopicPresenceEvent)
m.Header.Set(jetstream.UserID, userID)
m.Header.Set("presence", presence.String())
if statusMsg != nil {
m.Header.Set("status_msg", *statusMsg)
}
m.Header.Set("last_active_ts", strconv.Itoa(int(spec.AsTimestamp(time.Now()))))
_, err := p.JetStream.PublishMsg(m, nats.Context(ctx))
return err
}
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