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callback.go
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callback.go
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// Copyright 2023 LiveKit, Inc.
//
// 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 lksdk
import (
"github.com/pion/webrtc/v3"
"github.com/livekit/protocol/livekit"
)
// ParticipantAttributesChangedFunc is callback for Participant attribute change event.
// The function is called with an already updated participant state and the map of changes attributes.
// Deleted attributes will have empty string value in the changed map.
type ParticipantAttributesChangedFunc func(changed map[string]string, p Participant)
type ParticipantCallback struct {
// for all participants
OnTrackMuted func(pub TrackPublication, p Participant)
OnTrackUnmuted func(pub TrackPublication, p Participant)
OnMetadataChanged func(oldMetadata string, p Participant)
OnAttributesChanged ParticipantAttributesChangedFunc
OnIsSpeakingChanged func(p Participant)
OnConnectionQualityChanged func(update *livekit.ConnectionQualityInfo, p Participant)
// for remote participants
OnTrackSubscribed func(track *webrtc.TrackRemote, publication *RemoteTrackPublication, rp *RemoteParticipant)
OnTrackUnsubscribed func(track *webrtc.TrackRemote, publication *RemoteTrackPublication, rp *RemoteParticipant)
OnTrackSubscriptionFailed func(sid string, rp *RemoteParticipant)
OnTrackPublished func(publication *RemoteTrackPublication, rp *RemoteParticipant)
OnTrackUnpublished func(publication *RemoteTrackPublication, rp *RemoteParticipant)
OnDataReceived func(data []byte, params DataReceiveParams) // Deprecated: Use OnDataPacket instead
OnDataPacket func(data DataPacket, params DataReceiveParams)
}
func NewParticipantCallback() *ParticipantCallback {
return &ParticipantCallback{
OnTrackMuted: func(pub TrackPublication, p Participant) {},
OnTrackUnmuted: func(pub TrackPublication, p Participant) {},
OnMetadataChanged: func(oldMetadata string, p Participant) {},
OnAttributesChanged: func(changed map[string]string, p Participant) {},
OnIsSpeakingChanged: func(p Participant) {},
OnConnectionQualityChanged: func(update *livekit.ConnectionQualityInfo, p Participant) {},
OnTrackSubscribed: func(track *webrtc.TrackRemote, publication *RemoteTrackPublication, rp *RemoteParticipant) {},
OnTrackUnsubscribed: func(track *webrtc.TrackRemote, publication *RemoteTrackPublication, rp *RemoteParticipant) {},
OnTrackSubscriptionFailed: func(sid string, rp *RemoteParticipant) {},
OnTrackPublished: func(publication *RemoteTrackPublication, rp *RemoteParticipant) {},
OnTrackUnpublished: func(publication *RemoteTrackPublication, rp *RemoteParticipant) {},
OnDataReceived: func(data []byte, params DataReceiveParams) {},
OnDataPacket: func(data DataPacket, params DataReceiveParams) {},
}
}
func (cb *ParticipantCallback) Merge(other *ParticipantCallback) {
if other.OnTrackMuted != nil {
cb.OnTrackMuted = other.OnTrackMuted
}
if other.OnTrackUnmuted != nil {
cb.OnTrackUnmuted = other.OnTrackUnmuted
}
if other.OnMetadataChanged != nil {
cb.OnMetadataChanged = other.OnMetadataChanged
}
if other.OnAttributesChanged != nil {
cb.OnAttributesChanged = other.OnAttributesChanged
}
if other.OnIsSpeakingChanged != nil {
cb.OnIsSpeakingChanged = other.OnIsSpeakingChanged
}
if other.OnConnectionQualityChanged != nil {
cb.OnConnectionQualityChanged = other.OnConnectionQualityChanged
}
if other.OnTrackSubscribed != nil {
cb.OnTrackSubscribed = other.OnTrackSubscribed
}
if other.OnTrackUnsubscribed != nil {
cb.OnTrackUnsubscribed = other.OnTrackUnsubscribed
}
if other.OnTrackSubscriptionFailed != nil {
cb.OnTrackSubscriptionFailed = other.OnTrackSubscriptionFailed
}
if other.OnTrackPublished != nil {
cb.OnTrackPublished = other.OnTrackPublished
}
if other.OnTrackUnpublished != nil {
cb.OnTrackUnpublished = other.OnTrackUnpublished
}
if other.OnDataReceived != nil {
cb.OnDataReceived = other.OnDataReceived
}
if other.OnDataPacket != nil {
cb.OnDataPacket = other.OnDataPacket
}
}
type DisconnectionReason string
const (
LeaveRequested DisconnectionReason = "leave requested by room"
Failed DisconnectionReason = "connection to room failed"
)
type RoomCallback struct {
OnDisconnected func()
OnDisconnectedWithReason func(reason DisconnectionReason)
OnParticipantConnected func(*RemoteParticipant)
OnParticipantDisconnected func(*RemoteParticipant)
OnActiveSpeakersChanged func([]Participant)
OnRoomMetadataChanged func(metadata string)
OnReconnecting func()
OnReconnected func()
// participant events are sent to the room as well
ParticipantCallback
}
func NewRoomCallback() *RoomCallback {
pc := NewParticipantCallback()
return &RoomCallback{
ParticipantCallback: *pc,
OnDisconnected: func() {},
OnDisconnectedWithReason: func(reason DisconnectionReason) {},
OnParticipantConnected: func(participant *RemoteParticipant) {},
OnParticipantDisconnected: func(participant *RemoteParticipant) {},
OnActiveSpeakersChanged: func(participants []Participant) {},
OnRoomMetadataChanged: func(metadata string) {},
OnReconnecting: func() {},
OnReconnected: func() {},
}
}
func (cb *RoomCallback) Merge(other *RoomCallback) {
if other == nil {
return
}
if other.OnDisconnected != nil {
cb.OnDisconnected = other.OnDisconnected
}
if other.OnDisconnectedWithReason != nil {
cb.OnDisconnectedWithReason = other.OnDisconnectedWithReason
}
if other.OnParticipantConnected != nil {
cb.OnParticipantConnected = other.OnParticipantConnected
}
if other.OnParticipantDisconnected != nil {
cb.OnParticipantDisconnected = other.OnParticipantDisconnected
}
if other.OnActiveSpeakersChanged != nil {
cb.OnActiveSpeakersChanged = other.OnActiveSpeakersChanged
}
if other.OnRoomMetadataChanged != nil {
cb.OnRoomMetadataChanged = other.OnRoomMetadataChanged
}
if other.OnReconnecting != nil {
cb.OnReconnecting = other.OnReconnecting
}
if other.OnReconnected != nil {
cb.OnReconnected = other.OnReconnected
}
cb.ParticipantCallback.Merge(&other.ParticipantCallback)
}