Add packaging info

[rbdr/junction] / extension / content_script.js

diff --git a/extension/content_script.js b/extension/content_script.js
index 4a6c7e65315e19b2aa761aec95deb0dd6bf82585..26da2b054ecec0fcff3513d267a6867b9e235d7d 100644 (file)
--- a/extension/content_script.js
+++ b/extension/content_script.js
@@ -1,47 +1,145 @@
-(() => {
+import { io } from "socket.io-client";
+import Peers from "./peers";
+import Media from "./media";
 
-  const internals = {
-    port: null,
+const internals = {
+  kSocketUrl: "https://junction.tranquil.services",
+  kIceServers: [{ urls: "stun:stun.l.google.com:19302" }],
 
-    onMessage(message) {
-      internals[message.action](message.data);
-    },
+  port: null,
+  socket: null,
+  peers: {},
 
-    async joinAudioCall(data) {
+  onMessage(message) {
+    internals[message.action](message.data);
+  },
 
-      try {
-        const mediaStream = await navigator.mediaDevices.getUserMedia({ audio: true });
-        internals.createAudioElement(data.tada);
-      }
-      catch (err) {
+  async joinAudioCall({ currentUrl, tada }) {
+    try {
+      const mediaStream = await Media.start();
 
-        internals.port.postMessage({
-          action: 'error'
+      internals.socket = io(internals.kSocketUrl, {
+        transports: ["websocket"],
+      });
+
+      internals.socket.on("error", function (error) {
+        console.error("GENERAL ERROR", error);
+      });
+
+      internals.socket.on("connect_error", function (error) {
+        console.error("CONNNECT ERROR", error);
+      });
+
+      internals.socket.on("connect", function () {
+        console.log("Connected to signaling server, group: ", currentUrl);
+        internals.socket.emit("join", {
+          room: currentUrl,
         });
-        internals.port.disconnect();
-        internals.createAudioElement(data.tada);
-      }
-    },
+      });
 
-    hangUp() {
-      document.querySelectorAll('.junction-call-audio').forEach((audioElement) => audioElement.remove());
-      internals.port.disconnect();
-    },
+      internals.socket.on("disconnect", function () {
+        console.log("disconnected from signaling server");
+      });
+
+      internals.socket.on("addPeer", function ({ peerId }) {
+        /**
+         * Eventually the whole rtc connection logic should be moved to Peers.
+         * Now it only plays tadas.
+         */
+        Peers.add(peerId, tada);
+
+        const peerConnection = new RTCPeerConnection(
+          { iceServers: internals.kIceServers },
+          { optional: [{ DtlsSrtpKeyAgreement: true }] },
+        );
+
+        internals.peers[peerId] = peerConnection;
+        mediaStream.getTracks().forEach((track) => {
+          peerConnection.addTrack(track, mediaStream);
+        });
+
+        peerConnection.onicecandidate = (event) => {
+          if (event.candidate) {
+            internals.socket.emit("relayICECandidate", {
+              peerId: peerId,
+              candidate: event.candidate,
+            });
+          }
+        };
+
+        const remoteStream = new MediaStream();
+        peerConnection.ontrack = (event) => {
+          remoteStream.addTrack(event.track);
+          const remoteAudioElement = new Audio();
+          remoteAudioElement.srcObject = remoteStream;
+          remoteAudioElement.play();
+        };
+
+        peerConnection.onnegotiationneeded = async () => {
+          console.log("Creating RTC offer to ", peerId);
+          const offer = await peerConnection.createOffer();
+          await peerConnection.setLocalDescription(offer);
 
-    createAudioElement(source, type = 'audio/wav') {
+          // Emit the offer to the peer
+          internals.socket.emit("relayOffer", { offer, peerId });
+        };
 
-      const audioElement = document.createElement('audio');
-      audioElement.setAttribute('class', 'junction-call-audio');
-      audioElement.src = source;
-      audioElement.autoplay = 'autoplay';
-      audioElement.type = type;
-      document.querySelector('body').appendChild(audioElement);
+        console.log(`There are now ${Peers.count()} participants`);
+      });
+
+      internals.socket.on("offerReceived", async ({ offer, peerId }) => {
+        const peerConnection = internals.peers[peerId];
+
+        const remoteDescription = new RTCSessionDescription(offer);
+        await peerConnection.setRemoteDescription(remoteDescription);
+
+        const answer = await peerConnection.createAnswer();
+        await peerConnection.setLocalDescription(answer);
+
+        // Send the answer to the peer
+        internals.socket.emit("relayAnswer", { answer, peerId });
+      });
+
+      internals.socket.on("answerReceived", async ({ answer, peerId }) => {
+        const peerConnection = internals.peers[peerId];
+        const remoteDescription = new RTCSessionDescription(answer);
+        await peerConnection.setRemoteDescription(remoteDescription);
+      });
+
+      internals.socket.on(
+        "ICECandidateReceived",
+        async ({ candidate, peerId }) => {
+          const peerConnection = internals.peers[peerId];
+          const iceCandidate = new RTCIceCandidate(candidate);
+          await peerConnection.addIceCandidate(iceCandidate);
+        },
+      );
+
+      internals.socket.on("removePeer", function ({ peerId }) {
+        delete internals.peers[peerId];
+        Peers.remove(peerId);
+        console.log(`There are now ${Peers.count()} participants`);
+      });
+    } catch (err) {
+      internals.port.postMessage({
+        action: "error",
+      });
+      internals.port.disconnect();
     }
-  };
+  },
+
+  hangUp() {
+    Peers.reset();
+    Media.stop();
+    internals.socket.close();
+    internals.port.disconnect();
+  },
+};
+
+internals.port = chrome.runtime.connect({ name: "content" });
+internals.port.onMessage.addListener(internals.onMessage);
 
-  internals.port = chrome.runtime.connect({ name:"content" });
-  internals.port.onMessage.addListener(internals.onMessage);
-})();
+console.log("Content Script Loaded");
 
 // Indicates to the background script that we executed correctly
 true;