Add microphone mute (#158)

* Add code

* add code

frontend/shared/webrtc_utils.ts

@@ -51,10 +51,10 @@ export async function start(
   server_fn,
   webrtc_id,
   modality: "video" | "audio" = "video",
-  on_change_cb: (msg: "change" | "tick") => void = () => { },
+  on_change_cb: (msg: "change" | "tick") => void = () => {},
   rtp_params = {},
-  additional_message_cb: (msg: object) => void = () => { },
-  reject_cb: (msg: object) => void = () => { },
+  additional_message_cb: (msg: object) => void = () => {},
+  reject_cb: (msg: object) => void = () => {},
 ) {
   pc = createPeerConnection(pc, node);
   const data_channel = pc.createDataChannel("text");
@@ -105,7 +105,11 @@ export async function start(
   return pc;
 }
 
-function make_offer(server_fn: any, body, reject_cb: (msg: object) => void = () => { }): Promise<object> {
+function make_offer(
+  server_fn: any,
+  body,
+  reject_cb: (msg: object) => void = () => {},
+): Promise<object> {
   return new Promise((resolve, reject) => {
     server_fn(body).then((data) => {
       console.debug("data", data);
@@ -123,7 +127,7 @@ async function negotiate(
   pc: RTCPeerConnection,
   server_fn: any,
   webrtc_id: string,
-  reject_cb: (msg: object) => void = () => { },
+  reject_cb: (msg: object) => void = () => {},
 ): Promise<void> {
   return pc
     .createOffer()
@@ -150,11 +154,15 @@ async function negotiate(
     })
     .then(() => {
       var offer = pc.localDescription;
-      return make_offer(server_fn, {
-        sdp: offer.sdp,
-        type: offer.type,
-        webrtc_id: webrtc_id,
-      }, reject_cb);
+      return make_offer(
+        server_fn,
+        {
+          sdp: offer.sdp,
+          type: offer.type,
+          webrtc_id: webrtc_id,
+        },
+        reject_cb,
+      );
     })
     .then((response) => {
       return response;