525 lines
16 KiB
JavaScript
525 lines
16 KiB
JavaScript
let peerConnection = null;
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let peerConnections = {};
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let remoteStreams = {};
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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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let candidateQueue = [];
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const configuration = {
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iceServers:[
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{
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urls:[
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'stun:stun1.l.google.com:19302',
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'stun:stun2.l.google.com:19302',
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],
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},
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],
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iceCandidatePoolSize: 10,
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}
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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 ensureLocalMedia(forceReload = false) {
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const localMediaStatus = document.getElementById("localMediaStatus");
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const localVideoStatus = document.getElementById("localVideoStatus");
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const localVideo = document.getElementById("localVideo");
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const cameraSelect = document.getElementById("cameraSelect");
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const micSelect = document.getElementById("micSelect");
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if (localStream && !forceReload) {
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return;
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}
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if (localStream) {
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localStream.getTracks().forEach(track => track.stop());
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localStream = null;
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}
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let selectedCameraId = cameraSelect ? cameraSelect.value : "";
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let selectedMicId = micSelect ? micSelect.value : "";
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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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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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if (localVideo) localVideo.srcObject = null;
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throw audioErr;
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}
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}
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const hasVideo = localStream.getVideoTracks().length > 0;
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const hasAudio = localStream.getAudioTracks().length > 0;
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localVideo.srcObject = hasVideo ? localStream : null;
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if (localVideoStatus) {
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localVideoStatus.textContent = hasVideo
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? "Local video: active"
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: "Local video: unavailable";
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}
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if (localMediaStatus) {
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localMediaStatus.textContent = `Local media: audio=${hasAudio} video=${hasVideo}`;
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}
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if (!hasVideo) {
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LogMessage("No camera available, continuing without video");
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}
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}
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async function applyLocalStreamToPeerConnections() {
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if (!localStream) return;
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const audioTrack = localStream.getAudioTracks()[0] || null;
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const videoTrack = localStream.getVideoTracks()[0] || null;
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for (const username of Object.keys(peerConnections)) {
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const pc = peerConnections[username];
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const senders = pc.getSenders();
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const audioSender = senders.find(s => s.track && s.track.kind === "audio");
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const videoSender = senders.find(s => s.track && s.track.kind === "video");
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if (audioSender) {
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await audioSender.replaceTrack(audioTrack);
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LogMessage(`Replaced audio track for ${username}`);
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} else if (audioTrack) {
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pc.addTrack(audioTrack, localStream);
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LogMessage(`Added audio track for ${username}`);
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}
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if (videoSender) {
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await videoSender.replaceTrack(videoTrack);
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LogMessage(`Replaced video track for ${username}`);
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} else if (videoTrack) {
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pc.addTrack(videoTrack, localStream);
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LogMessage(`Added video track for ${username}`);
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}
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}
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}
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async function refreshDevicesAndPreview() {
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await loadDevices();
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await ensureLocalMedia(true);
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if (Object.keys(peerConnections).length > 0) {
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await applyLocalStreamToPeerConnections();
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}
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}
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//TODO: Only join call if no active call in progress for client
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//TODO: Enable proper leave call functions
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//TODO: Leave call and join new call if client clicks a 2nd voice channel
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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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const isActive = await window.HybridWebView.InvokeDotNet("JoinRtcChannel");
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const peerConnection = await ensurePeerConnectionForUser(currentUsername);
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await ensureLocalMedia();
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if (isActive) {
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const rawJson = await window.HybridWebView.InvokeDotNet("GetRtcOffer");
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const offer = typeof rawJson === "string" ? JSON.parse(rawJson) : rawJson;
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await peerConnection.setRemoteDescription(offer);
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const answer = await peerConnection.createAnswer();
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await peerConnection.setRemoteDescription(answer);
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await window.HybridWebView.InvokeDotNet("WriteRtcAnswer", [JSON.stringify(answer)])
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const rawParticipants = await window.HybridWebView.InvokeDotNet("GetRtcParticipants");
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const participants = typeof rawParticipants === "string" ? JSON.parse(rawParticipants) : rawParticipants;
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LogMessage("Participants: " + JSON.stringify(participants)); // TODO: Remove
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for (const username of participants) {
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if (username === currentUsername) continue;
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const pc = await ensurePeerConnectionForUser(username);
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const offer = await pc.createOffer();
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await pc.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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to: username,
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channelId: currentChannelId,
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sdp: offer.sdp
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};
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await window.HybridWebView.InvokeDotNet("SendRtcSignal", [JSON.stringify(payload)]);
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LogMessage(`Sent offer to ${username}`);
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}
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}
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else
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{
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try {
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LogMessage(currentUsername + " attempted to join inactive channel. Making new call.")
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const offer = await peerConnection.createOffer();
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await peerConnection.setLocalDescription(offer);
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await window.HybridWebView.InvokeDotNet("WriteRtcOffer", [JSON.stringify(offer)]);
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LogMessage(`Joining call with media offer: ${JSON.stringify(offer)}`);
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}
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catch (error) {
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LogMessage(error)
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}
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}
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}
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async function channelCallJoin(activeCall)
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{
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// LogMessage("Active call: " + activeCall);
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await ensurePeerConnectionForUser(currentUsername);
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if (activeCall)
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{
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const rawJson = await window.HybridWebView.InvokeDotNet("GetRtcOffer");
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const offer = typeof rawJson === "string" ? JSON.parse(rawJson) : rawJson;
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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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// LogMessage("Joining call with media answer: " + JSON.stringify(answer));
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// LogMessage("Calling C# WriteRtcAnswer with: " + JSON.stringify(answer));
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await window.HybridWebView.InvokeDotNet("WriteRtcAnswer", [JSON.stringify(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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await window.HybridWebView.InvokeDotNet("WriteRtcOffer", [JSON.stringify(offer)]);
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}
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}
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async function ensurePeerConnectionForUser(username) {
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if (peerConnections[username]) return peerConnections[username];
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const pc = new RTCPeerConnection(configuration);
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peerConnections[username] = pc;
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pc.onicegatheringstatechange = () => {
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console.log(`ICE gathering state changed for ${username}: ${pc.iceGatheringState}`);
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};
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pc.onconnectionstatechange = () => {
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console.log(`Connection state change for ${username}: ${pc.connectionState}`);
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};
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pc.onsignalingstatechange = () => {
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console.log(`Signaling state change for ${username}: ${pc.signalingState}`);
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};
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pc.oniceconnectionstatechange = () => {
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console.log(`ICE connection state change for ${username}: ${pc.iceConnectionState}`);
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};
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pc.onicecandidate = async (event) => {
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if (!event.candidate) return;
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await window.HybridWebView.InvokeDotNet("WriteIceCandidate", [JSON.stringify(event.candidate)]);
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};
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pc.ontrack = (event) => {
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LogMessage(`Remote track received from ${username}`);
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if (!remoteStreams[username]) {
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remoteStreams[username] = new MediaStream();
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}
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const stream = remoteStreams[username];
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event.streams[0].getTracks().forEach(track => {
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if (!stream.getTracks().some(t => t.id === track.id)) {
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stream.addTrack(track);
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}
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});
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const remoteVideo = ensureRemoteTile(username);
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if (remoteVideo) {
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remoteVideo.srcObject = stream;
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}
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};
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if (localStream) {
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const existingKinds = pc.getSenders()
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.map(sender => sender.track?.kind)
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.filter(Boolean);
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for (const track of localStream.getTracks()) {
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if (!existingKinds.includes(track.kind)) {
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pc.addTrack(track, localStream);
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}
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}
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}
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return pc;
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}
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async function RtcLeaveCall() { // TODO: Just a minimal function so it's not empty.
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for (const username of Object.keys(peerConnections)) {
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peerConnections[username].close();
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removeRemoteTile(username);
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}
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peerConnections = {};
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remoteStreams = {};
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candidateQueue = [];
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LogMessage("RTC call cleaned up");
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}
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function removeParticipant(username) {
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const pc = peerConnections[username];
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if (pc) {
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pc.close();
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delete peerConnections[username];
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}
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delete remoteStreams[username];
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removeRemoteTile(username);
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LogMessage(`Removed participant ${username}`);
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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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if (!msg.from || msg.from === currentUsername) return;
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const pc = await ensurePeerConnectionForUser(msg.from);
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if (msg.type === "rtc_offer") {
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await ensureLocalMedia();
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await pc.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 pc.createAnswer();
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await pc.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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to: msg.from,
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channelId: msg.channelId,
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sdp: answer.sdp
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};
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await window.HybridWebView.InvokeDotNet("SendRtcSignal", [JSON.stringify(payload)]);
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LogMessage(`Sent answer to ${msg.from}`);
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return;
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}
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if (msg.type === "rtc_answer") {
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await pc.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 for ${msg.from}`);
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return;
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}
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if (msg.type === "rtc_ice_candidate") {
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await pc.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 for ${msg.from}`);
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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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function wireDeviceSelectors() {
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const cameraSelect = document.getElementById("cameraSelect");
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const micSelect = document.getElementById("micSelect");
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if (cameraSelect) {
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cameraSelect.onchange = async () => {
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LogMessage("Camera changed");
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await ensureLocalMedia(true);
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await applyLocalStreamToPeerConnections();
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};
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}
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if (micSelect) {
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micSelect.onchange = async () => {
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LogMessage("Microphone changed");
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await ensureLocalMedia(true);
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await applyLocalStreamToPeerConnections();
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};
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}
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}
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async function waitForIceGatheringComplete(pc) {
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if (pc.iceGatheringState === "complete") return;
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await new Promise(resolve => {
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function checkState() {
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if (pc.iceGatheringState === "complete") {
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pc.removeEventListener("icegatheringstatechange", checkState);
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resolve();
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}
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}
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pc.addEventListener("icegatheringstatechange", checkState);
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});
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} //Remove?
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function ensureRemoteTile(username) {
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let tile = document.getElementById(`remote-tile-${username}`);
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if (tile) {
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return tile.querySelector("video");
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}
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const container = document.getElementById("remoteMediaContainer");
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if (!container) return null;
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tile = document.createElement("div");
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tile.id = `remote-tile-${username}`;
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tile.className = "remote-tile";
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const video = document.createElement("video");
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video.id = `remote-video-${username}`;
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video.autoplay = true;
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video.playsInline = true;
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const label = document.createElement("div");
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label.className = "remote-label";
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label.textContent = username;
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tile.appendChild(video);
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tile.appendChild(label);
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container.appendChild(tile);
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return video;
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}
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function removeRemoteTile(username) {
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const tile = document.getElementById(`remote-tile-${username}`);
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if (tile) {
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tile.remove();
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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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wireDeviceSelectors();
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await ensureLocalMedia(true);
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}); |