Add candidates negotiation

src/methods/addScreenShareRemoteIceCandidate.tsx

@@ -0,0 +1,34 @@
+import { addScreenShareRemoteIceCandidate as nativeAddScreenShareRemoteIceCandidate } from '../native-components/BBBN_ScreenShareService';
+import nativeEmitter from '../native-messaging/emitter';
+
+// Reference to the resolver of last call
+let resolve = (value: unknown) => {
+  console.log(
+    `default resolve function called, this should never happen: ${value}`
+  );
+};
+
+// Resolve promise when SDP offer is available
+nativeEmitter.addListener('onAddScreenShareRemoteIceCandidateCompleted', () => {
+  resolve(undefined);
+});
+
+// Entry point of this method
+function addScreenShareRemoteIceCandidate(remoteCandidateJson: string) {
+  return new Promise((res, rej) => {
+    // store the resolver for later call (when event is received)
+    resolve = res;
+
+    try {
+      console.log(
+        `>nativeAddScreenShareRemoteIceCandidate ${remoteCandidateJson}`
+      );
+      // call native swift method that triggers the broadcast popup
+      nativeAddScreenShareRemoteIceCandidate(remoteCandidateJson);
+    } catch (e) {
+      rej(`Call to nativeAddScreenShareRemoteIceCandidate failed`);
+    }
+  });
+}
+
+export default addScreenShareRemoteIceCandidate;

src/native-components/BBBN_ScreenShareService.tsx

@@ -13,3 +13,7 @@ export function createScreenShareOffer() {
 export function setScreenShareRemoteSDP(remoteSDP: string) {
   ScreenShareService.setScreenShareRemoteSDP(remoteSDP);
 }
+
+export function addScreenShareRemoteIceCandidate(remoteCandidateJson: string) {
+  ScreenShareService.addScreenShareRemoteIceCandidate(remoteCandidateJson);
+}

src/webview/message-handler.tsx

@@ -3,6 +3,7 @@ import type { WebView, WebViewMessageEvent } from 'react-native-webview';
 import initializeScreenShare from '../methods/initializeScreenShare';
 import createScreenShareOffer from '../methods/createScreenShareOffer';
 import setScreenShareRemoteSDP from '../methods/setScreenShareRemoteSDP';
+import addScreenShareRemoteIceCandidate from '../methods/addScreenShareRemoteIceCandidate';
 
 function observePromiseResult(
   webViewRef: MutableRefObject<WebView>,
@@ -47,6 +48,11 @@ export function handleWebviewMessage(
       case 'setRemoteDescription':
         promise = setScreenShareRemoteSDP(data?.arguments[0].sdp);
         break;
+      case 'addRemoteIceCandidate':
+        promise = addScreenShareRemoteIceCandidate(
+          JSON.stringify(data?.arguments[0])
+        );
+        break;
       default:
         throw `Unknown method ${data?.method}`;
     }