373 lines
12 KiB
JavaScript
373 lines
12 KiB
JavaScript
let peerConnection = null;
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let localStream = null;
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let currentUsername = null;
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let currentChannelId = null;
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let availableCameras = [];
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let availableMics = [];
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window.setUsername = function(name) {
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currentUsername = name;
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LogMessage("Username set to: " + currentUsername);
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};
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window.setChannelId = function(channelId) {
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currentChannelId = channelId;
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LogMessage("Channel set to: " + currentChannelId);
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};
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function LogMessage(msg) {
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const messageLog = document.getElementById("messageLog");
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messageLog.value += '\r\n' + msg;
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messageLog.scrollTop = messageLog.scrollHeight;
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}
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function hasVideoTrack() {
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return !!localStream && localStream.getVideoTracks().length > 0;
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}
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function hasAudioTrack() {
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return !!localStream && localStream.getAudioTracks().length > 0;
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}
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async function ensurePeerConnection() {
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if (peerConnection) return;
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peerConnection = new RTCPeerConnection({
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iceServers: [{ urls: "stun:stun.l.google.com:19302" }]
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});
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peerConnection.onicecandidate = async (event) => {
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if (!event.candidate || !currentChannelId || !currentUsername) return;
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const payload = {
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type: "rtc_ice_candidate",
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from: currentUsername,
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channelId: currentChannelId,
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candidate: event.candidate.candidate,
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sdpMid: event.candidate.sdpMid,
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sdpMLineIndex: event.candidate.sdpMLineIndex
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};
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LogMessage("Sending ICE candidate");
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await window.HybridWebView.InvokeDotNet("SendRtcSignal", [JSON.stringify(payload)]);
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};
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peerConnection.ontrack = (event) => {
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LogMessage("Remote track received");
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const remoteVideo = document.getElementById("remoteVideo");
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const remoteVideoStatus = document.getElementById("remoteVideoStatus");
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const remoteMediaStatus = document.getElementById("remoteMediaStatus");
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const stream = event.streams[0];
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const hasVideo = stream.getVideoTracks().length > 0;
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const hasAudio = stream.getAudioTracks().length > 0;
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if (hasVideo) {
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remoteVideo.srcObject = stream;
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} else {
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remoteVideo.srcObject = null;
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}
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if (remoteVideoStatus) {
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remoteVideoStatus.textContent = hasVideo
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? "Remote video: active"
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: "Remote video: unavailable";
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}
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if (remoteMediaStatus) {
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remoteMediaStatus.textContent = `Remote media: audio=${hasAudio} video=${hasVideo}`;
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}
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};
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peerConnection.onconnectionstatechange = () => {
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LogMessage("Connection state: " + peerConnection.connectionState);
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const remoteMediaStatus = document.getElementById("remoteMediaStatus");
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if (remoteMediaStatus && peerConnection.connectionState === "connected") {
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remoteMediaStatus.textContent += " | connected";
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}
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};
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peerConnection.oniceconnectionstatechange = () => {
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LogMessage("ICE connection state: " + peerConnection.iceConnectionState);
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};
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peerConnection.onicegatheringstatechange = () => {
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LogMessage("ICE gathering state: " + peerConnection.iceGatheringState);
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};
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}
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async function ensureLocalMedia() {
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if (localStream) return;
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const localMediaStatus = document.getElementById("localMediaStatus");
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const localVideoStatus = document.getElementById("localVideoStatus");
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const cameraSelect = document.getElementById("cameraSelect");
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const micSelect = document.getElementById("micSelect");
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let selectedCameraId = cameraSelect ? cameraSelect.value : "";
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let selectedMicId = micSelect ? micSelect.value : "";
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let mediaError = null;
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const videoConstraint = selectedCameraId
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? { deviceId: { exact: selectedCameraId } }
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: false;
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const audioConstraint = selectedMicId
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? { deviceId: { exact: selectedMicId } }
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: true;
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try {
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localStream = await navigator.mediaDevices.getUserMedia({
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video: videoConstraint,
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audio: audioConstraint
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});
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LogMessage("Local media initialized");
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} catch (err) {
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mediaError = err;
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LogMessage("selected media failed: " + err);
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try {
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localStream = await navigator.mediaDevices.getUserMedia({
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video: false,
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audio: audioConstraint
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});
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LogMessage("Local media initialized with audio only fallback");
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} catch (audioErr) {
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LogMessage("audio-only failed: " + audioErr);
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if (localMediaStatus) localMediaStatus.textContent = "Local media failed";
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if (localVideoStatus) localVideoStatus.textContent = "Local video: unavailable";
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throw mediaError;
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}
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}
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const localVideo = document.getElementById("localVideo");
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if (localStream.getVideoTracks().length > 0) {
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localVideo.srcObject = localStream;
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if (localVideoStatus) localVideoStatus.textContent = "Local video: active";
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if (localMediaStatus) localMediaStatus.textContent = "Local media: audio + video";
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} else {
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localVideo.srcObject = null;
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if (localVideoStatus) localVideoStatus.textContent = "Local video: unavailable";
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if (localMediaStatus) localMediaStatus.textContent = "Local media: audio only";
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LogMessage("No camera available, continuing without video");
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}
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for (const track of localStream.getTracks()) {
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peerConnection.addTrack(track, localStream);
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LogMessage(`Added local track: ${track.kind}`);
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}
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}
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async function joinChannelCall() {
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LogMessage("Current username: " + currentUsername);
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LogMessage("Current channel: " + currentChannelId);
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//TODO: Update Server DB to hold bool if channel has an active call
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//TODO: First check if channel already has an active offer, if it does join with an answer, otherwise make a new offer
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try {
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if (!currentChannelId) {
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LogMessage("No current channel set.");
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return;
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}
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await ensurePeerConnection();
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await ensureLocalMedia();
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LogMessage(`Joining call with media: audio=${hasAudioTrack()} video=${hasVideoTrack()}`);
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const offer = await peerConnection.createOffer();
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await peerConnection.setLocalDescription(offer);
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const payload = {
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type: "rtc_offer",
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from: currentUsername,
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channelId: currentChannelId,
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sdp: offer.sdp
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};
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LogMessage("Sending offer to channel " + currentChannelId);
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await window.HybridWebView.InvokeDotNet("SendRtcSignal", [JSON.stringify(payload)]);
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} catch (err) {
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LogMessage("joinChannelCall failed: " + err);
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}
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}
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async function channelCallJoin()
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{
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const activeCall = true; //TODO: Read Surreal DB with channel id for active call
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if (activeCall)
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{
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const offer = roomSnapshot.data().offer; //TODO: Replace with active call offer from DB using the active ID for current channel
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await peerConnection.setRemoteDescription(offer);
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const answer = await peerConnection.createAnswer();
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await peerConnection.setLocalDescription(answer);
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const roomAnswer = {
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answer: {
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type: answer.type,
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sdp: answer.sdp
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}
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}
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await roomRef.update(roomAnswer); //TODO: Update offer in SurrealDB to include answer
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}
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else
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{
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const offer = await peerConnection.createOffer();
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await peerConnection.setLocalDescription(offer);
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const roomOffer = {
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offer: {
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type: offer.type,
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sdp: offer.sdp
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}
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}
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const roomRef = "id"; //TODO: Add offer to SurrealDB on server
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const roomId = roomRef.id;
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//TODO: Write roomId to surreal DB with channel id as active call
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//TODO: Add callback function for when call is answered to replace following code block
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roomRef.onSnapshot(async snapshot => {
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console.log('Got updated room:', snapshot.data());
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const data = snapshot.data();
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if (!peerConnection.currentRemoteDescription && data.answer) {
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console.log('Set remote description: ', data.answer);
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const answer = new RTCSessionDescription(data.answer)
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await peerConnection.setRemoteDescription(answer);
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}
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});
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}
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}
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async function handleRtcSignal(rawJson) {
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try {
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const msg = typeof rawJson === "string" ? JSON.parse(rawJson) : rawJson;
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LogMessage("Received signal: " + msg.type + " from " + msg.from + " in " + msg.channelId);
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await ensurePeerConnection();
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if (msg.type === "rtc_offer") {
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LogMessage("Incoming channel call offer from " + msg.from);
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await ensureLocalMedia();
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LogMessage(`Answering call with media: audio=${hasAudioTrack()} video=${hasVideoTrack()}`);
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LogMessage("Applying remote offer");
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await peerConnection.setRemoteDescription({
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type: "offer",
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sdp: msg.sdp
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});
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const answer = await peerConnection.createAnswer();
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await peerConnection.setLocalDescription(answer);
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const payload = {
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type: "rtc_answer",
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from: currentUsername,
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channelId: msg.channelId,
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sdp: answer.sdp
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};
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LogMessage("Sending answer to channel " + msg.channelId);
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await window.HybridWebView.InvokeDotNet("SendRtcSignal", [JSON.stringify(payload)]);
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return;
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}
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if (msg.type === "rtc_answer") {
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LogMessage("Applying remote answer");
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await peerConnection.setRemoteDescription({
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type: "answer",
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sdp: msg.sdp
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});
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LogMessage("Remote answer applied");
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return;
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}
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if (msg.type === "rtc_ice_candidate") {
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LogMessage("Applying remote ICE candidate");
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await peerConnection.addIceCandidate({
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candidate: msg.candidate,
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sdpMid: msg.sdpMid,
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sdpMLineIndex: msg.sdpMLineIndex
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});
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LogMessage("Remote ICE candidate applied");
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return;
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}
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LogMessage("Unhandled signal type: " + msg.type);
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} catch (err) {
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LogMessage("handleRtcSignal failed: " + err);
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}
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}
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async function loadDevices() {
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try {
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const devices = await navigator.mediaDevices.enumerateDevices();
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availableCameras = devices.filter(d => d.kind === "videoinput");
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availableMics = devices.filter(d => d.kind === "audioinput");
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const cameraSelect = document.getElementById("cameraSelect");
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const micSelect = document.getElementById("micSelect");
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if (!cameraSelect || !micSelect) {
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LogMessage("Device dropdowns not found.");
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return;
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}
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cameraSelect.innerHTML = "";
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micSelect.innerHTML = "";
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const noCameraOption = document.createElement("option");
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noCameraOption.value = "";
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noCameraOption.text = "No camera / audio-only";
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cameraSelect.appendChild(noCameraOption);
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const noMicOption = document.createElement("option");
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noMicOption.value = "";
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noMicOption.text = "Default microphone";
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micSelect.appendChild(noMicOption);
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for (const cam of availableCameras) {
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const option = document.createElement("option");
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option.value = cam.deviceId;
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option.text = cam.label || `Camera ${cameraSelect.options.length}`;
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cameraSelect.appendChild(option);
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}
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for (const mic of availableMics) {
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const option = document.createElement("option");
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option.value = mic.deviceId;
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option.text = mic.label || `Microphone ${micSelect.options.length + 1}`;
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micSelect.appendChild(option);
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}
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LogMessage(`Loaded devices: ${availableCameras.length} cameras, ${availableMics.length} mics`);
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} catch (err) {
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LogMessage("loadDevices failed: " + err);
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}
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}
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window.handleRtcSignal = handleRtcSignal;
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window.addEventListener("HybridWebViewMessageReceived", function (e) {
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LogMessage("Raw message: " + e.detail.message);
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});
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window.addEventListener("load", async () => {
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LogMessage("RTC page loaded");
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window.HybridWebView.SendRawMessage("rtc_page_ready");
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await loadDevices();
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}); |