refactor for multiple sessions

http_server.ts

@@ -1,31 +1,26 @@
 import { createWriteStream } from "node:fs";
 import http from "node:http";
 
-import { Handlers, makeSession } from "./session.js";
+import { Handlers, makeSession, Session } from "./session.js";
+import { discoverDevices } from "./discovery.js";
+import { DevSerial } from "./impl.js";
 
-const s = makeSession(Handlers, { debug: false, ansi: false });
-const withAudio = false;
+const opts = { debug: false, ansi: false };
 
 let BOUNDARY = "a very good boundary line";
 let responses = [];
-
-s.eventEmitter.on("frame", (frame: Buffer) => {
-  let s = `--${BOUNDARY}\r\n`;
-  s += "Content-Type: image/jpeg\r\n\r\n";
-  responses.forEach((res) => {
-    res.write(Buffer.from(s));
-    res.write(frame);
-  });
-});
-
-if (withAudio) {
-  const audioFd = createWriteStream(`audio.pcm`);
-  s.eventEmitter.on("audio", (frame: Buffer) => {
-    audioFd.write(frame);
-  });
-}
+let sessions: Record<string, Session> = {};
 
 const server = http.createServer((req, res) => {
+  let devId = req.url.slice(1);
+  console.log("requested for", devId);
+  let s = sessions[devId];
+
+  if (s === undefined) {
+    res.writeHead(400);
+    res.end("invalid ID");
+    return;
+  }
   if (!s.connected) {
     res.writeHead(400);
     res.end("Nothing online");
@@ -35,4 +30,35 @@ const server = http.createServer((req, res) => {
   responses.push(res);
 });
 
+let devEv = discoverDevices(opts);
+devEv.on("discover", (rinfo, dev: DevSerial) => {
+  if (dev.devId in sessions) {
+    console.log(`ignoring ${dev.devId} - ${rinfo.address}`);
+    return;
+  }
+  console.log(`discovered ${dev.devId} - ${rinfo.address}`);
+  const s = makeSession(Handlers, dev, rinfo, opts);
+  const withAudio = false;
+  s.eventEmitter.on("frame", (frame: Buffer) => {
+    let s = `--${BOUNDARY}\r\n`;
+    s += "Content-Type: image/jpeg\r\n\r\n";
+    responses.forEach((res) => {
+      res.write(Buffer.from(s));
+      res.write(frame);
+    });
+  });
+
+  s.eventEmitter.on("disconnect", () => {
+    console.log("deleting from sessions");
+    sessions[dev.devId] = undefined;
+  });
+  if (withAudio) {
+    const audioFd = createWriteStream(`audio.pcm`);
+    s.eventEmitter.on("audio", (frame: Buffer) => {
+      audioFd.write(frame);
+    });
+  }
+  sessions[dev.devId] = s;
+});
+
 server.listen(1234);