Added participant list in voice room

Author: somiljain2006

src/main/java/org/spacehub/controller/voiceRoom/VoiceRoomController.java

@@ -12,7 +12,9 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import com.fasterxml.jackson.databind.JsonNode;
+
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
@@ -62,11 +64,10 @@ public ResponseEntity<?> joinVoiceRoom(
       String sessionId = janusService.createSession();
       String handleId = janusService.attachAudioBridgePlugin(sessionId);
 
-      JsonNode janusResponse = janusService.joinAudioRoom(sessionId, handleId, janusRoomId, displayName);
-
-      JsonNode participantsNode = janusResponse.path("plugindata").path("data").path("participants");
+      janusService.joinAudioRoom(sessionId, handleId, janusRoomId, displayName);
+      JsonNode participantsNode = janusService.listParticipants(sessionId, handleId, janusRoomId);
 
-      Map<String, Object> responseData = new java.util.HashMap<>();
+      Map<String, Object> responseData = new HashMap<>();
       responseData.put("message", "Joined voice room successfully");
       responseData.put("janusRoomId", janusRoomId);
       responseData.put("sessionId", sessionId);

src/main/java/org/spacehub/service/VoiceRoom/JanusService.java

@@ -111,7 +111,7 @@ public void createAudioRoom(String sessionId, String handleId, int roomId) {
     restTemplate.postForEntity(handleUrl, request, JsonNode.class);
   }
 
-  public JsonNode joinAudioRoom(String sessionId, String handleId, int roomId, String displayName) {
+  public void joinAudioRoom(String sessionId, String handleId, int roomId, String displayName) {
     Map<String, Object> body = Map.of(
       "request", "join", "room", roomId, "display", displayName
     );
@@ -122,7 +122,24 @@ public JsonNode joinAudioRoom(String sessionId, String handleId, int roomId, Str
 
     ResponseEntity<JsonNode> response = restTemplate.postForEntity(handleUrl, request, JsonNode.class);
     logger.info("Janus join response: {}", response.getBody());
-    return response.getBody();
+  }
+
+  public JsonNode listParticipants(String sessionId, String handleId, int roomId) {
+    Map<String, Object> body = Map.of(
+      "request", "listparticipants", "room", roomId
+    );
+    Map<String, Object> request = Map.of(
+      "janus", "message", "transaction", UUID.randomUUID().toString(), "body", body
+    );
+    String handleUrl = String.format("%s/%s/%s", janusUrl, sessionId, handleId);
+
+    ResponseEntity<JsonNode> response = restTemplate.postForEntity(handleUrl, request, JsonNode.class);
+
+    if (response.getBody() != null) {
+      return response.getBody().path("plugindata").path("data").path("list");
+    }
+
+    throw new RuntimeException("Failed to get participant list from Janus");
   }
 
   public void sendOffer(String sessionId, String handleId, String sdpOffer,