good progress with server and client back and forth

- getting there slowly with console logs and understanding the steps along the way

packages/api/index.ts

@@ -6,6 +6,7 @@ import { UserService } from "./services/user.service";
 import { UserStatus } from "@nirvana/core/models";
 import cors from "cors";
 import getConversationRoutes from "./routes/conversation";
+import getRtcRoutes from "./routes/rtc";
 import getSearchRoutes from "./routes/search";
 import getUserRoutes from "./routes/user";
 
@@ -23,12 +24,16 @@ app.get("/", (req: Request, res: Response) => {
   res.send("hello world.");
 });
 
+app.use("/api/rtc", getRtcRoutes());
+
 app.use("/api/user", getUserRoutes());
 app.use("/api/search", getSearchRoutes());
 app.use("/api/conversations", getConversationRoutes());
 
 const PORT = 5000;
-var server = app.listen(PORT, () => console.log("express running"));
+var server = app.listen(PORT, () =>
+  console.log(`express running on port ${PORT}`)
+);
 
 // socket IO stuff
 

packages/api/package.json

@@ -12,7 +12,8 @@
     "google-auth-library": "^7.14.0",
     "jsonwebtoken": "^8.5.1",
     "mongodb": "^4.4.1",
-    "socket.io": "^4.4.1"
+    "socket.io": "^4.4.1",
+    "wrtc": "^0.4.7"
   },
   "scripts": {
     "dev": "NODE_ENV=development nodemon",

packages/api/routes/rtc.ts

@@ -0,0 +1,78 @@
+import express, { Application, Request, Response } from "express";
+
+const webrtc = require("wrtc");
+
+export default function getRtcRoutes() {
+  const router = express.Router();
+
+  router.use(express.json());
+
+  // get user details based on id token
+  router.post("/join/:lineId", handleJoin);
+
+  return router;
+}
+
+// a mapping between a certain line and the streams for it
+const linesStreams: {
+  [lineId: string]: any[];
+} = {};
+
+async function handleJoin(req: Request, res: Response) {
+  try {
+    const { lineId } = req.params;
+    const { sdp } = req.body;
+
+    const peer = new webrtc.RTCPeerConnection({
+      iceServers: [
+        {
+          urls: "stun:stun.stunprotocol.org",
+        },
+      ],
+    });
+
+    // allow this peer connection to receive other peoples' streams
+    peer.ontrack = (e: any) => handleStreams(e, peer, lineId);
+
+    // allow this peer connection for this specific line to get tracks for this line already
+    linesStreams[lineId]?.forEach((stream: any) => {
+      stream.getTracks().forEach((track: any) => {
+        console.log(`have tracks in this line`, track, stream);
+        peer.addTrack(track, stream);
+      });
+    });
+
+    // create connection between server and client who hit this endpoint
+    const desc = new webrtc.RTCSessionDescription(sdp);
+    await peer.setRemoteDescription(desc);
+    const answer = await peer.createAnswer();
+    await peer.setLocalDescription(answer);
+
+    const payload = {
+      sdp: peer.localDescription,
+    };
+
+    res
+      .status(200)
+      .json({ message: `You can now broadcast to ${lineId}!`, data: payload });
+  } catch (error) {
+    console.log(error);
+
+    res.status(500).json({
+      message: "Problem in setting up peer connection with media server",
+      error,
+    });
+  }
+}
+
+function handleStreams(e: any, peer: any, lineId: string) {
+  // if the room/line exists already, then add to the list of streams
+  if (lineId in linesStreams) {
+    const newStreamsForLine = [...(linesStreams[lineId] ?? []), ...e.streams];
+
+    linesStreams[lineId] = newStreamsForLine;
+  } else {
+    // create a new list of streams
+    linesStreams[lineId] = [...e.streams];
+  }
+}

packages/web/package.json

@@ -10,6 +10,7 @@
   },
   "dependencies": {
     "@nirvana/components": "*",
+    "axios": "^0.27.2",
     "next": "12.1.4",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",

packages/web/pages/rtc/index.tsx

@@ -0,0 +1,137 @@
+import { useEffect, useRef, useState } from "react";
+
+import axios from "axios";
+import { toast } from "react-toastify";
+
+const lines = ["line1", "line2", "line3", "line4", "line5"];
+
+// todo: join different combinations of lines based on page params
+// for now, every browser tab/client joins all 5 lines and streams to one specific one
+
+export default function VideoChat() {
+  const [selectedLine, setSelectedLine] = useState<string>(lines[0]);
+  const videoRef = useRef<HTMLVideoElement>();
+
+  // connect to media server for line connections as a broadcaster and consumer
+  useEffect(() => {
+    navigator.mediaDevices
+      .getUserMedia({ video: true, audio: true })
+      .then((mediaStream: any) => {
+        console.log("mediaStream", mediaStream);
+
+        if (videoRef.current) {
+          toast("got local user video stream");
+          videoRef.current.srcObject = mediaStream;
+          videoRef.current.play();
+
+          // create a unique peer connection to server for each line
+          lines.forEach((lineId) => {
+            // create the peer and add the tranceiver
+            const peer = createPeer(lineId);
+
+            console.log(`peer connection for ${lineId}`, peer);
+
+            peer.addTransceiver("video");
+
+            mediaStream.getTracks().forEach((track: any) => {
+              console.log(`adding track to peer connection`);
+              peer.addTrack(track, mediaStream);
+            });
+          });
+        }
+      });
+  }, [lines]);
+
+  const createPeer = (lineId: string) => {
+    const peer = new RTCPeerConnection({
+      iceServers: [
+        {
+          urls: "stun:stun.stunprotocol.org",
+        },
+      ],
+    });
+    peer.ontrack = handleTrackEvent;
+    peer.onnegotiationneeded = () => handleNegotiationNeededEvent(peer, lineId);
+
+    return peer;
+  };
+
+  const handleNegotiationNeededEvent = async (
+    peer: RTCPeerConnection,
+    lineId: string
+  ) => {
+    // create offer
+    const offer = await peer.createOffer();
+    await peer.setLocalDescription(offer);
+    const payload = {
+      sdp: peer.localDescription,
+    };
+
+    // send offer to server to accept
+    const { data } = await axios.post(
+      `http://localhost:5000/api/rtc/join/${lineId}`,
+      payload
+    );
+
+    // receive server acceptance and set remote configs
+    const desc = new RTCSessionDescription(data.data.sdp);
+    peer.setRemoteDescription(desc).catch((e) => console.log(e));
+
+    console.log(`done handling negotiation with media server`);
+  };
+
+  // render tracks on the server peer sending something
+  function handleTrackEvent(e: any) {
+    const incomingStream = e.streams[0];
+
+    console.log("incoming stream", e);
+  }
+
+  return (
+    <div className="text-white p-10">
+      <h1 className="text-xl">This is a baller video app</h1>
+
+      <ol>
+        <li>
+          - user joins 5 lines hardcoded lines (stream to and accept any streams
+          in those lines)
+        </li>
+        <li>- user can see which line certain content is coming from</li>
+        <li>- user can set medium: share screen or video (along with audio)</li>
+        <li>- user can select medium they want to send to</li>
+        <li>- user hold tilde to stream selected medium in a specific line</li>
+        <li>
+          - user can receive transmitted stream content from any line, and see
+          which line it's streamed to
+        </li>
+      </ol>
+
+      <h1 className="text-3xl mt-10">Your Video</h1>
+      <span>toggle medium (todo)</span>
+      <video
+        ref={videoRef}
+        id={"userVideo"}
+        muted
+        height={"300"}
+        width={"300"}
+      />
+
+      <h1 className="text-3xl mt-10">Select a Line</h1>
+      {lines.map((lineId) => (
+        <a
+          id={`${lineId}-Selection`}
+          className={`cursor-pointer p-5 ${
+            selectedLine === lineId ? "text-green-400" : "text-white"
+          }`}
+          onClick={() => setSelectedLine(lineId)}
+        >
+          {lineId}
+        </a>
+      ))}
+
+      <h1 className="text-3xl mt-10">
+        Hold tilde (`) to stream to `{selectedLine}`
+      </h1>
+    </div>
+  );
+}

yarn.lock

@@ -1649,6 +1649,11 @@ anymatch@~3.1.2:
     normalize-path "^3.0.0"
     picomatch "^2.0.4"
 
+aproba@^1.0.3:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/aproba/-/aproba-1.2.0.tgz#6802e6264efd18c790a1b0d517f0f2627bf2c94a"
+  integrity sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw==
+
 "aproba@^1.0.3 || ^2.0.0":
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/aproba/-/aproba-2.0.0.tgz#52520b8ae5b569215b354efc0caa3fe1e45a8adc"
@@ -1662,6 +1667,14 @@ are-we-there-yet@^3.0.0:
     delegates "^1.0.0"
     readable-stream "^3.6.0"
 
+are-we-there-yet@~1.1.2:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/are-we-there-yet/-/are-we-there-yet-1.1.7.tgz#b15474a932adab4ff8a50d9adfa7e4e926f21146"
+  integrity sha512-nxwy40TuMiUGqMyRHgCSWZ9FM4VAoRP4xUYSTv5ImRog+h9yISPbVH7H8fASCIzYn9wlEv4zvFL7uKDMCFQm3g==
+  dependencies:
+    delegates "^1.0.0"
+    readable-stream "^2.0.6"
+
 arg@^4.1.0:
   version "4.1.3"
   resolved "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz"
@@ -1849,6 +1862,14 @@ axios@^0.26.1:
   dependencies:
     follow-redirects "^1.14.8"
 
+axios@^0.27.2:
+  version "0.27.2"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.27.2.tgz#207658cc8621606e586c85db4b41a750e756d972"
+  integrity sha512-t+yRIyySRTp/wua5xEr+z1q60QmLq8ABsS5O9Me1AsE5dfKqgnCFzwiCZZ/cGNd1lq4/7akDWMxdhVlucjmnOQ==
+  dependencies:
+    follow-redirects "^1.14.9"
+    form-data "^4.0.0"
+
 axobject-query@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/axobject-query/-/axobject-query-2.2.0.tgz#943d47e10c0b704aa42275e20edf3722648989be"
@@ -2243,6 +2264,11 @@ chokidar@^3.4.2, chokidar@^3.5.2, chokidar@^3.5.3:
   optionalDependencies:
     fsevents "~2.3.2"
 
+chownr@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.4.tgz#6fc9d7b42d32a583596337666e7d08084da2cc6b"
+  integrity sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg==
+
 chownr@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/chownr/-/chownr-2.0.0.tgz#15bfbe53d2eab4cf70f18a8cd68ebe5b3cb1dece"
@@ -2385,7 +2411,7 @@ colorette@^2.0.10:
   resolved "https://registry.npmjs.org/colorette/-/colorette-2.0.16.tgz"
   integrity sha512-hUewv7oMjCp+wkBv5Rm0v87eJhq4woh5rSR+42YSQJKecCqgIqNkZ6lAlQms/BwHPJA5NKMRlpxPRv0n8HQW6g==
 
-combined-stream@^1.0.6, combined-stream@~1.0.6:
+combined-stream@^1.0.6, combined-stream@^1.0.8, combined-stream@~1.0.6:
   version "1.0.8"
   resolved "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz"
   integrity sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==
@@ -2503,7 +2529,7 @@ connect-history-api-fallback@^1.6.0:
   resolved "https://registry.npmjs.org/connect-history-api-fallback/-/connect-history-api-fallback-1.6.0.tgz"
   integrity sha512-e54B99q/OUoH64zYYRf3HBP5z24G38h5D3qXu23JGRoigpX5Ss4r9ZnDk3g0Z8uQC2x2lPaJ+UlWBc1ZWBWdLg==
 
-console-control-strings@^1.1.0:
+console-control-strings@^1.0.0, console-control-strings@^1.1.0, console-control-strings@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
   integrity sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=
@@ -2721,7 +2747,7 @@ debug@4, debug@^4.0.1, debug@^4.1.0, debug@^4.1.1, debug@^4.3.1, debug@^4.3.2:
   dependencies:
     ms "2.1.2"
 
-debug@^3.1.0, debug@^3.1.1, debug@^3.2.7:
+debug@^3.1.0, debug@^3.1.1, debug@^3.2.6, debug@^3.2.7:
   version "3.2.7"
   resolved "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz"
   integrity sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==
@@ -2861,7 +2887,7 @@ destroy@~1.0.4:
   resolved "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz"
   integrity sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=
 
-detect-libc@^1.0.3:
+detect-libc@^1.0.2, detect-libc@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
   integrity sha1-+hN8S9aY7fVc1c0CrFWfkaTEups=
@@ -2975,6 +3001,13 @@ domelementtype@^2.0.1, domelementtype@^2.2.0:
   resolved "https://registry.npmjs.org/domelementtype/-/domelementtype-2.2.0.tgz"
   integrity sha512-DtBMo82pv1dFtUmHyr48beiuq792Sxohr+8Hm9zoxklYPfa6n0Z3Byjj2IV7bmr2IyqClnqEQhfgHJJ5QF0R5A==
 
+domexception@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/domexception/-/domexception-1.0.1.tgz#937442644ca6a31261ef36e3ec677fe805582c90"
+  integrity sha512-raigMkn7CJNNo6Ihro1fzG7wr3fHuYVytzquZKX5n0yizGsTcYgzdIUwj1X9pK0VvjeihV+XiclP+DjwbsSKug==
+  dependencies:
+    webidl-conversions "^4.0.2"
+
 domhandler@^4.0.0, domhandler@^4.2.0, domhandler@^4.3.0:
   version "4.3.0"
   resolved "https://registry.npmjs.org/domhandler/-/domhandler-4.3.0.tgz"
@@ -3951,7 +3984,7 @@ flora-colossus@^1.0.0:
     debug "^4.1.1"
     fs-extra "^7.0.0"
 
-follow-redirects@^1.0.0, follow-redirects@^1.14.8:
+follow-redirects@^1.0.0, follow-redirects@^1.14.8, follow-redirects@^1.14.9:
   version "1.14.9"
   resolved "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.9.tgz"
   integrity sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w==
@@ -3980,6 +4013,15 @@ fork-ts-checker-webpack-plugin@^6.0.1:
     semver "^7.3.2"
     tapable "^1.0.0"
 
+form-data@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-4.0.0.tgz#93919daeaf361ee529584b9b31664dc12c9fa452"
+  integrity sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "^1.0.8"
+    mime-types "^2.1.12"
+
 form-data@~2.3.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.3.tgz#dcce52c05f644f298c6a7ab936bd724ceffbf3a6"
@@ -4050,6 +4092,13 @@ fs-extra@^9.0.0, fs-extra@^9.0.1:
     jsonfile "^6.0.1"
     universalify "^2.0.0"
 
+fs-minipass@^1.2.7:
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.7.tgz#ccff8570841e7fe4265693da88936c55aed7f7c7"
+  integrity sha512-GWSSJGFy4e9GUeCcbIkED+bgAoFyj7XF1mV8rma3QW4NIqX9Kyx79N/PF61H5udOV3aY1IaMLs6pGbH71nlCTA==
+  dependencies:
+    minipass "^2.6.0"
+
 fs-minipass@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-2.1.0.tgz#7f5036fdbf12c63c169190cbe4199c852271f9fb"
@@ -4110,6 +4159,20 @@ gauge@^4.0.0:
     strip-ansi "^6.0.1"
     wide-align "^1.1.5"
 
+gauge@~2.7.3:
+  version "2.7.4"
+  resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"
+  integrity sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=
+  dependencies:
+    aproba "^1.0.3"
+    console-control-strings "^1.0.0"
+    has-unicode "^2.0.0"
+    object-assign "^4.1.0"
+    signal-exit "^3.0.0"
+    string-width "^1.0.1"
+    strip-ansi "^3.0.1"
+    wide-align "^1.1.0"
+
 gaxios@^2.1.0:
   version "2.3.4"
   resolved "https://registry.npmjs.org/gaxios/-/gaxios-2.3.4.tgz"
@@ -4509,7 +4572,7 @@ has-tostringtag@^1.0.0:
   dependencies:
     has-symbols "^1.0.2"
 
-has-unicode@^2.0.1:
+has-unicode@^2.0.0, has-unicode@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
   integrity sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=
@@ -4701,7 +4764,7 @@ humanize-ms@^1.2.1:
   dependencies:
     ms "^2.0.0"
 
-[email protected], iconv-lite@^0.4.24:
+[email protected], iconv-lite@^0.4.24, iconv-lite@^0.4.4:
   version "0.4.24"
   resolved "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz"
   integrity sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==
@@ -4730,6 +4793,13 @@ ignore-by-default@^1.0.1:
   resolved "https://registry.npmjs.org/ignore-by-default/-/ignore-by-default-1.0.1.tgz"
   integrity sha1-SMptcvbGo68Aqa1K5odr44ieKwk=
 
+ignore-walk@^3.0.1:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/ignore-walk/-/ignore-walk-3.0.4.tgz#c9a09f69b7c7b479a5d74ac1a3c0d4236d2a6335"
+  integrity sha512-PY6Ii8o1jMRA1z4F2hRkH/xN59ox43DavKvD3oDpfurRlOJyAHpifIwpbdv1n4jt4ov0jSpw3kQ4GhJnpBL6WQ==
+  dependencies:
+    minimatch "^3.0.4"
+
 ignore@^5.1.8, ignore@^5.2.0:
   version "5.2.0"
   resolved "https://registry.npmjs.org/ignore/-/ignore-5.2.0.tgz"
@@ -5777,6 +5847,14 @@ minipass-sized@^1.0.3:
   dependencies:
     minipass "^3.0.0"
 
+minipass@^2.6.0, minipass@^2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/minipass/-/minipass-2.9.0.tgz#e713762e7d3e32fed803115cf93e04bca9fcc9a6"
+  integrity sha512-wxfUjg9WebH+CUDX/CdbRlh5SmfZiy/hpkxaRI16Y9W56Pa75sWgd/rvFilSgrauD9NyFymP/+JFV3KwzIsJeg==
+  dependencies:
+    safe-buffer "^5.1.2"
+    yallist "^3.0.0"
+
 minipass@^3.0.0, minipass@^3.1.0, minipass@^3.1.1, minipass@^3.1.3:
   version "3.1.6"
   resolved "https://registry.yarnpkg.com/minipass/-/minipass-3.1.6.tgz#3b8150aa688a711a1521af5e8779c1d3bb4f45ee"
@@ -5784,6 +5862,13 @@ minipass@^3.0.0, minipass@^3.1.0, minipass@^3.1.1, minipass@^3.1.3:
   dependencies:
     yallist "^4.0.0"
 
+minizlib@^1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/minizlib/-/minizlib-1.3.3.tgz#2290de96818a34c29551c8a8d301216bd65a861d"
+  integrity sha512-6ZYMOEnmVsdCeTJVE0W9ZD+pVnE8h9Hma/iOwwRDsdQoePpoX56/8B6z3P9VNwppJuBKNRuFDRNRqRWexT9G9Q==
+  dependencies:
+    minipass "^2.9.0"
+
 minizlib@^2.0.0, minizlib@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/minizlib/-/minizlib-2.1.2.tgz#e90d3466ba209b932451508a11ce3d3632145931"
@@ -5884,6 +5969,15 @@ natural-compare@^1.4.0:
   resolved "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz"
   integrity sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=
 
+needle@^2.2.1:
+  version "2.9.1"
+  resolved "https://registry.yarnpkg.com/needle/-/needle-2.9.1.tgz#22d1dffbe3490c2b83e301f7709b6736cd8f2684"
+  integrity sha512-6R9fqJ5Zcmf+uYaFgdIHmLwNldn5HbK8L5ybn7Uz+ylX/rnOsSp1AHcvQSrCaFN+qNM1wpymHqD7mVasEOlHGQ==
+  dependencies:
+    debug "^3.2.6"
+    iconv-lite "^0.4.4"
+    sax "^1.2.4"
+
 [email protected], negotiator@^0.6.2:
   version "0.6.3"
   resolved "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz"
@@ -5994,6 +6088,22 @@ node-loader@^2.0.0:
   dependencies:
     loader-utils "^2.0.0"
 
+node-pre-gyp@^0.13.0:
+  version "0.13.0"
+  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.13.0.tgz#df9ab7b68dd6498137717838e4f92a33fc9daa42"
+  integrity sha512-Md1D3xnEne8b/HGVQkZZwV27WUi1ZRuZBij24TNaZwUPU3ZAFtvT6xxJGaUVillfmMKnn5oD1HoGsp2Ftik7SQ==
+  dependencies:
+    detect-libc "^1.0.2"
+    mkdirp "^0.5.1"
+    needle "^2.2.1"
+    nopt "^4.0.1"
+    npm-packlist "^1.1.6"
+    npmlog "^4.0.2"
+    rc "^1.2.7"
+    rimraf "^2.6.1"
+    semver "^5.3.0"
+    tar "^4"
+
 node-releases@^2.0.2:
   version "2.0.2"
   resolved "https://registry.npmjs.org/node-releases/-/node-releases-2.0.2.tgz"
@@ -6015,6 +6125,14 @@ nodemon@^2.0.15:
     undefsafe "^2.0.5"
     update-notifier "^5.1.0"
 
+nopt@^4.0.1:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/nopt/-/nopt-4.0.3.tgz#a375cad9d02fd921278d954c2254d5aa57e15e48"
+  integrity sha512-CvaGwVMztSMJLOeXPrez7fyfObdZqNUK1cPAEzLHrTybIua9pMdmmPR5YwtfNftIOMv3DPUhFaxsZMNTQO20Kg==
+  dependencies:
+    abbrev "1"
+    osenv "^0.1.4"
+
 nopt@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-5.0.0.tgz#530942bb58a512fccafe53fe210f13a25355dc88"
@@ -6059,6 +6177,13 @@ normalize-url@^6.0.1:
   resolved "https://registry.npmjs.org/normalize-url/-/normalize-url-6.1.0.tgz"
   integrity sha512-DlL+XwOy3NxAQ8xuC0okPgK46iuVNAK01YN7RueYBqqFeGsBjV9XmCAzAdgt+667bCl5kPh9EqKKDwnaPG1I7A==
 
+npm-bundled@^1.0.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/npm-bundled/-/npm-bundled-1.1.2.tgz#944c78789bd739035b70baa2ca5cc32b8d860bc1"
+  integrity sha512-x5DHup0SuyQcmL3s7Rx/YQ8sbw/Hzg0rj48eN0dV7hf5cmQq5PXIeioroH3raV1QC1yh3uTYuMThvEQF3iKgGQ==
+  dependencies:
+    npm-normalize-package-bin "^1.0.1"
+
 npm-conf@^1.1.3:
   version "1.1.3"
   resolved "https://registry.npmjs.org/npm-conf/-/npm-conf-1.1.3.tgz"
@@ -6067,6 +6192,20 @@ npm-conf@^1.1.3:
     config-chain "^1.1.11"
     pify "^3.0.0"
 
+npm-normalize-package-bin@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/npm-normalize-package-bin/-/npm-normalize-package-bin-1.0.1.tgz#6e79a41f23fd235c0623218228da7d9c23b8f6e2"
+  integrity sha512-EPfafl6JL5/rU+ot6P3gRSCpPDW5VmIzX959Ob1+ySFUuuYHWHekXpwdUZcKP5C+DS4GEtdJluwBjnsNDl+fSA==
+
+npm-packlist@^1.1.6:
+  version "1.4.8"
+  resolved "https://registry.yarnpkg.com/npm-packlist/-/npm-packlist-1.4.8.tgz#56ee6cc135b9f98ad3d51c1c95da22bbb9b2ef3e"
+  integrity sha512-5+AZgwru5IevF5ZdnFglB5wNlHG1AOOuw28WhUq8/8emhBmLv6jX5by4WJCh7lW0uSYZYS6DXqIsyZVIXRZU9A==
+  dependencies:
+    ignore-walk "^3.0.1"
+    npm-bundled "^1.0.1"
+    npm-normalize-package-bin "^1.0.1"
+
 npm-run-path@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
@@ -6081,6 +6220,16 @@ npm-run-path@^4.0.1:
   dependencies:
     path-key "^3.0.0"
 
+npmlog@^4.0.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.1.2.tgz#08a7f2a8bf734604779a9efa4ad5cc717abb954b"
+  integrity sha512-2uUqazuKlTaSI/dC8AzicUck7+IrEaOnN/e0jd3Xtt1KcGpwx30v50mL7oPyr/h9bL3E4aZccVwpwP+5W9Vjkg==
+  dependencies:
+    are-we-there-yet "~1.1.2"
+    console-control-strings "~1.1.0"
+    gauge "~2.7.3"
+    set-blocking "~2.0.0"
+
 npmlog@^6.0.0:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-6.0.1.tgz#06f1344a174c06e8de9c6c70834cfba2964bba17"
@@ -6121,7 +6270,7 @@ oauth-sign@~0.9.0:
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.9.0.tgz#47a7b016baa68b5fa0ecf3dee08a85c679ac6455"
   integrity sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==
 
-object-assign@^4, object-assign@^4.1.1:
+object-assign@^4, object-assign@^4.1.0, object-assign@^4.1.1:
   version "4.1.1"
   resolved "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz"
   integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
@@ -6271,11 +6420,24 @@ ora@^5.0.0, ora@^5.1.0, ora@^5.4.1:
     strip-ansi "^6.0.0"
     wcwidth "^1.0.1"
 
-os-tmpdir@~1.0.2:
+os-homedir@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
+  integrity sha1-/7xJiDNuDoM94MFox+8VISGqf7M=
+
+os-tmpdir@^1.0.0, os-tmpdir@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
   integrity sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=
 
+osenv@^0.1.4:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/osenv/-/osenv-0.1.5.tgz#85cdfafaeb28e8677f416e287592b5f3f49ea410"
+  integrity sha512-0CWcCECdMVc2Rw3U5w9ZjqX6ga6ubk1xDVKxtBQPK7wis/0F2r9T6k4ydGYhecl7YUBxBVxhL5oisPsNxAPe2g==
+  dependencies:
+    os-homedir "^1.0.0"
+    os-tmpdir "^1.0.0"
+
 p-cancelable@^1.0.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/p-cancelable/-/p-cancelable-1.1.0.tgz"
@@ -7194,7 +7356,7 @@ rc-virtual-list@^3.2.0, rc-virtual-list@^3.4.2:
     rc-resize-observer "^1.0.0"
     rc-util "^5.0.7"
 
-rc@^1.2.8:
+rc@^1.2.7, rc@^1.2.8:
   version "1.2.8"
   resolved "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz"
   integrity sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==
@@ -7300,7 +7462,7 @@ read-pkg@^2.0.0:
     normalize-package-data "^2.3.2"
     path-type "^2.0.0"
 
-readable-stream@^2.0.1, readable-stream@^2.2.2:
+readable-stream@^2.0.1, readable-stream@^2.0.6, readable-stream@^2.2.2:
   version "2.3.7"
   resolved "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz"
   integrity sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==
@@ -7536,7 +7698,7 @@ [email protected], rimraf@^3.0.0, rimraf@^3.0.2:
   dependencies:
     glob "^7.1.3"
 
-rimraf@^2.6.3:
+rimraf@^2.6.1, rimraf@^2.6.3:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.7.1.tgz#35797f13a7fdadc566142c29d4f07ccad483e3ec"
   integrity sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==
@@ -7586,7 +7748,7 @@ [email protected], safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz"
   integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
 
-[email protected], safe-buffer@>=5.1.0, safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2, safe-buffer@~5.2.0:
+[email protected], safe-buffer@>=5.1.0, safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2, safe-buffer@^5.2.1, safe-buffer@~5.2.0:
   version "5.2.1"
   resolved "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
@@ -7603,6 +7765,11 @@ saslprep@^1.0.3:
   dependencies:
     sparse-bitfield "^3.0.3"
 
+sax@^1.2.4:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
+  integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
+
 scheduler@^0.20.2:
   version "0.20.2"
   resolved "https://registry.npmjs.org/scheduler/-/scheduler-0.20.2.tgz"
@@ -7670,7 +7837,7 @@ semver-diff@^3.1.1:
   dependencies:
     semver "^6.3.0"
 
-"semver@2 || 3 || 4 || 5", semver@^5.5.0, semver@^5.6.0, semver@^5.7.1:
+"semver@2 || 3 || 4 || 5", semver@^5.3.0, semver@^5.5.0, semver@^5.6.0, semver@^5.7.1:
   version "5.7.1"
   resolved "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
@@ -7743,7 +7910,7 @@ [email protected]:
     parseurl "~1.3.3"
     send "0.17.2"
 
-set-blocking@^2.0.0:
+set-blocking@^2.0.0, set-blocking@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
   integrity sha1-BF+XgtARrppoA93TgrJDkrPYkPc=
@@ -8090,7 +8257,7 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
-strip-ansi@^3.0.0:
+strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
   integrity sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=
@@ -8233,6 +8400,19 @@ tapable@^2.0.0, tapable@^2.1.1, tapable@^2.2.0:
   resolved "https://registry.npmjs.org/tapable/-/tapable-2.2.1.tgz"
   integrity sha512-GNzQvQTOIP6RyTfE2Qxb8ZVlNmw0n88vp1szwWRimP02mnTsx3Wtn5qRdqY9w2XduFNUgvOwhNnQsjwCp+kqaQ==
 
+tar@^4:
+  version "4.4.19"
+  resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.19.tgz#2e4d7263df26f2b914dee10c825ab132123742f3"
+  integrity sha512-a20gEsvHnWe0ygBY8JbxoM4w3SJdhc7ZAuxkLqh+nvNQN2IOt0B5lLgM490X5Hl8FF0dl0tOf2ewFYAlIFgzVA==
+  dependencies:
+    chownr "^1.1.4"
+    fs-minipass "^1.2.7"
+    minipass "^2.9.0"
+    minizlib "^1.3.3"
+    mkdirp "^0.5.5"
+    safe-buffer "^5.2.1"
+    yallist "^3.1.1"
+
 tar@^6.0.2, tar@^6.0.5, tar@^6.1.2:
   version "6.1.11"
   resolved "https://registry.yarnpkg.com/tar/-/tar-6.1.11.tgz#6760a38f003afa1b2ffd0ffe9e9abbd0eab3d621"
@@ -8734,6 +8914,11 @@ webidl-conversions@^3.0.0:
   resolved "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz"
   integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
 
+webidl-conversions@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-4.0.2.tgz#a855980b1f0b6b359ba1d5d9fb39ae941faa63ad"
+  integrity sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==
+
 webidl-conversions@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-7.0.0.tgz#256b4e1882be7debbf01d05f0aa2039778ea080a"
@@ -8889,7 +9074,7 @@ which@^2.0.1, which@^2.0.2:
   dependencies:
     isexe "^2.0.0"
 
-wide-align@^1.1.5:
+wide-align@^1.1.0, wide-align@^1.1.5:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/wide-align/-/wide-align-1.1.5.tgz#df1d4c206854369ecf3c9a4898f1b23fbd9d15d3"
   integrity sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==
@@ -8946,6 +9131,15 @@ write-file-atomic@^3.0.0:
     signal-exit "^3.0.2"
     typedarray-to-buffer "^3.1.5"
 
+wrtc@^0.4.7:
+  version "0.4.7"
+  resolved "https://registry.yarnpkg.com/wrtc/-/wrtc-0.4.7.tgz#c61530cd662713e50bffe64b7a78673ce070426c"
+  integrity sha512-P6Hn7VT4lfSH49HxLHcHhDq+aFf/jd9dPY7lDHeFhZ22N3858EKuwm2jmnlPzpsRGEPaoF6XwkcxY5SYnt4f/g==
+  dependencies:
+    node-pre-gyp "^0.13.0"
+  optionalDependencies:
+    domexception "^1.0.1"
+
 ws@^7.4.6:
   version "7.5.7"
   resolved "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz"
@@ -9013,7 +9207,7 @@ y18n@^5.0.5:
   resolved "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz"
   integrity sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==
 
-yallist@^3.0.2:
+yallist@^3.0.0, yallist@^3.0.2, yallist@^3.1.1:
   version "3.1.1"
   resolved "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz"
   integrity sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==