Initial commit.

receivers/electron/src/DiscoveryService.ts

@@ -0,0 +1,42 @@
+import mdns = require('mdns-js');
+const cp = require('child_process');
+const os = require('os');
+
+export class DiscoveryService {
+    private service: any;
+
+    private static getComputerName() {
+        switch (process.platform) {
+            case "win32":
+                return process.env.COMPUTERNAME;
+            case "darwin":
+                return cp.execSync("scutil --get ComputerName").toString().trim();
+            case "linux":
+                const prettyname = cp.execSync("hostnamectl --pretty").toString().trim();
+                return prettyname === "" ? os.hostname() : prettyname;
+            default:
+                return os.hostname();
+        }
+    }
+
+    start() {
+        if (this.service) {
+            return;
+        }
+
+        const name = `FCast-${DiscoveryService.getComputerName()}`;
+        console.log("Discovery service started.", name);
+
+        this.service = mdns.createAdvertisement(mdns.tcp('_fcast'), 46899, { name: name });
+        this.service.start();
+    }
+
+    stop() {
+        if (!this.service) {
+            return;
+        }
+
+        this.service.stop();
+        this.service = null;
+    }
+}