Misha Krieger-Raynauld | 20cf1c8 | 2022-11-23 20:26:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2022 Savoir-faire Linux Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Affero General Public License as |
| 6 | * published by the Free Software Foundation; either version 3 of the |
| 7 | * License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU Affero General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Affero General Public |
| 15 | * License along with this program. If not, see |
| 16 | * <https://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | import { WebRtcIceCandidate, WebRtcSdp, WebSocketMessageType } from 'jami-web-common'; |
| 20 | import { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react'; |
| 21 | |
| 22 | import { WithChildren } from '../utils/utils'; |
| 23 | import { ConversationContext } from './ConversationProvider'; |
| 24 | import { WebSocketContext } from './WebSocketProvider'; |
| 25 | |
| 26 | interface IWebRtcContext { |
| 27 | isConnected: boolean; |
| 28 | |
| 29 | remoteStreams: readonly MediaStream[] | undefined; |
| 30 | webRtcConnection: RTCPeerConnection | undefined; |
| 31 | |
| 32 | sendWebRtcOffer: (sdp: RTCSessionDescriptionInit) => Promise<void>; |
| 33 | } |
| 34 | |
| 35 | const defaultWebRtcContext: IWebRtcContext = { |
| 36 | isConnected: false, |
| 37 | remoteStreams: undefined, |
| 38 | webRtcConnection: undefined, |
| 39 | sendWebRtcOffer: async () => {}, |
| 40 | }; |
| 41 | |
| 42 | export const WebRtcContext = createContext<IWebRtcContext>(defaultWebRtcContext); |
| 43 | |
| 44 | export default ({ children }: WithChildren) => { |
| 45 | const webSocket = useContext(WebSocketContext); |
| 46 | const { conversation } = useContext(ConversationContext); |
| 47 | const [webRtcConnection, setWebRtcConnection] = useState<RTCPeerConnection | undefined>(); |
| 48 | const [remoteStreams, setRemoteStreams] = useState<readonly MediaStream[]>(); |
| 49 | const [isConnected, setIsConnected] = useState(false); |
| 50 | |
| 51 | // TODO: This logic will have to change to support multiple people in a call |
| 52 | const contactUri = useMemo(() => conversation.getFirstMember().contact.getUri(), [conversation]); |
| 53 | |
| 54 | useEffect(() => { |
| 55 | if (!webRtcConnection) { |
| 56 | // TODO: Use SFL iceServers |
| 57 | const iceConfig = { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] }; |
| 58 | setWebRtcConnection(new RTCPeerConnection(iceConfig)); |
| 59 | } |
| 60 | }, [webRtcConnection]); |
| 61 | |
| 62 | const sendWebRtcOffer = useCallback( |
| 63 | async (sdp: RTCSessionDescriptionInit) => { |
| 64 | if (!webRtcConnection || !webSocket) { |
| 65 | throw new Error('Could not send WebRTC offer'); |
| 66 | } |
| 67 | |
| 68 | const webRtcOffer: WebRtcSdp = { |
| 69 | contactId: contactUri, |
| 70 | sdp, |
| 71 | }; |
| 72 | |
| 73 | console.info('Sending WebRtcOffer', webRtcOffer); |
| 74 | webSocket.send(WebSocketMessageType.WebRtcOffer, webRtcOffer); |
| 75 | await webRtcConnection.setLocalDescription(new RTCSessionDescription(sdp)); |
| 76 | }, |
| 77 | [webRtcConnection, webSocket, contactUri] |
| 78 | ); |
| 79 | |
| 80 | const sendWebRtcAnswer = useCallback( |
| 81 | (sdp: RTCSessionDescriptionInit) => { |
| 82 | if (!webRtcConnection || !webSocket) { |
| 83 | throw new Error('Could not send WebRTC answer'); |
| 84 | } |
| 85 | |
| 86 | const webRtcAnswer: WebRtcSdp = { |
| 87 | contactId: contactUri, |
| 88 | sdp, |
| 89 | }; |
| 90 | |
| 91 | console.info('Sending WebRtcAnswer', webRtcAnswer); |
| 92 | webSocket.send(WebSocketMessageType.WebRtcAnswer, webRtcAnswer); |
| 93 | }, |
| 94 | [contactUri, webRtcConnection, webSocket] |
| 95 | ); |
| 96 | |
| 97 | useEffect(() => { |
| 98 | if (!webSocket || !webRtcConnection) { |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | const webRtcOfferListener = async (data: WebRtcSdp) => { |
| 103 | console.info('Received event on WebRtcOffer', data); |
| 104 | await webRtcConnection.setRemoteDescription(new RTCSessionDescription(data.sdp)); |
| 105 | |
| 106 | const sdp = await webRtcConnection.createAnswer({ |
| 107 | offerToReceiveAudio: true, |
| 108 | offerToReceiveVideo: true, |
| 109 | }); |
| 110 | sendWebRtcAnswer(sdp); |
| 111 | await webRtcConnection.setLocalDescription(new RTCSessionDescription(sdp)); |
| 112 | setIsConnected(true); |
| 113 | }; |
| 114 | |
| 115 | const webRtcAnswerListener = async (data: WebRtcSdp) => { |
| 116 | console.info('Received event on WebRtcAnswer', data); |
| 117 | await webRtcConnection.setRemoteDescription(new RTCSessionDescription(data.sdp)); |
| 118 | setIsConnected(true); |
| 119 | }; |
| 120 | |
| 121 | const webRtcIceCandidateListener = async (data: WebRtcIceCandidate) => { |
| 122 | console.info('Received event on WebRtcIceCandidate', data); |
| 123 | await webRtcConnection.addIceCandidate(data.candidate); |
| 124 | }; |
| 125 | |
| 126 | webSocket.bind(WebSocketMessageType.WebRtcOffer, webRtcOfferListener); |
| 127 | webSocket.bind(WebSocketMessageType.WebRtcAnswer, webRtcAnswerListener); |
| 128 | webSocket.bind(WebSocketMessageType.WebRtcIceCandidate, webRtcIceCandidateListener); |
| 129 | |
| 130 | return () => { |
| 131 | webSocket.unbind(WebSocketMessageType.WebRtcOffer, webRtcOfferListener); |
| 132 | webSocket.unbind(WebSocketMessageType.WebRtcAnswer, webRtcAnswerListener); |
| 133 | webSocket.unbind(WebSocketMessageType.WebRtcIceCandidate, webRtcIceCandidateListener); |
| 134 | }; |
| 135 | }, [webSocket, webRtcConnection, sendWebRtcAnswer]); |
| 136 | |
| 137 | useEffect(() => { |
| 138 | if (!webRtcConnection || !webSocket) { |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | const iceCandidateEventListener = (event: RTCPeerConnectionIceEvent) => { |
| 143 | console.info('Received WebRTC event on icecandidate', event); |
| 144 | if (!contactUri) { |
| 145 | throw new Error('Could not handle WebRTC event on icecandidate: contactUri is not defined'); |
| 146 | } |
| 147 | |
| 148 | if (event.candidate) { |
| 149 | const webRtcIceCandidate: WebRtcIceCandidate = { |
| 150 | contactId: contactUri, |
| 151 | candidate: event.candidate, |
| 152 | }; |
| 153 | |
| 154 | console.info('Sending WebRtcIceCandidate', webRtcIceCandidate); |
| 155 | webSocket.send(WebSocketMessageType.WebRtcIceCandidate, webRtcIceCandidate); |
| 156 | } |
| 157 | }; |
| 158 | |
| 159 | const trackEventListener = (event: RTCTrackEvent) => { |
| 160 | console.info('Received WebRTC event on track', event); |
| 161 | setRemoteStreams(event.streams); |
| 162 | }; |
| 163 | |
| 164 | webRtcConnection.addEventListener('icecandidate', iceCandidateEventListener); |
| 165 | webRtcConnection.addEventListener('track', trackEventListener); |
| 166 | |
| 167 | return () => { |
| 168 | webRtcConnection.removeEventListener('icecandidate', iceCandidateEventListener); |
| 169 | webRtcConnection.removeEventListener('track', trackEventListener); |
| 170 | }; |
| 171 | }, [webRtcConnection, webSocket, contactUri]); |
| 172 | |
| 173 | return ( |
| 174 | <WebRtcContext.Provider |
| 175 | value={{ |
| 176 | isConnected, |
| 177 | remoteStreams, |
| 178 | webRtcConnection, |
| 179 | sendWebRtcOffer, |
| 180 | }} |
| 181 | > |
| 182 | {children} |
| 183 | </WebRtcContext.Provider> |
| 184 | ); |
| 185 | }; |