refactor to allow bundling

pair.ts

@@ -0,0 +1,33 @@
+import { RemoteInfo } from "dgram";
+
+import { opt } from "./options.js";
+import { discoverDevices } from "./discovery.js";
+import { DevSerial } from "./impl.js";
+import { Handlers, makeSession, Session, configureWifi } from "./session.js";
+
+export const pair = ({ opts, ssid, password }: { opts: opt; ssid: string; password: string }) => {
+  console.log(`Will configure any devices found to join ${ssid}`);
+  let sessions: Record<string, Session> = {};
+
+  let devEv = discoverDevices(opts.debug, opts.discovery_ip);
+  if (password == "") {
+    throw new Error("You must set a non-zero-length password");
+  }
+
+  const onLogin = configureWifi(ssid, password);
+
+  devEv.on("discover", (rinfo: RemoteInfo, 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, onLogin, opts);
+
+    s.eventEmitter.on("disconnect", () => {
+      console.log("deleting from sessions");
+      delete sessions[dev.devId];
+    });
+    sessions[dev.devId] = s;
+  });
+};