Ringing

Implement incoming and outgoing call notifications by integrating the Calls SDK with the CometChat Chat SDK for call signaling.

The Calls SDK handles the actual call session. For call signaling (ringing, accept, reject), use the CometChat Chat SDK’s calling features.

Overview

Call flow with ringing:

Initiator sends a call request via Chat SDK
Receiver gets notified of incoming call
Receiver accepts or rejects the call
Both parties join the call session using Calls SDK

Prerequisites

Install both SDKs:

npm install @cometchat/chat-sdk-javascript @cometchat/calls-sdk-javascript

Initialize Both SDKs

import { CometChat } from "@cometchat/chat-sdk-javascript";
import { CometChatCalls } from "@cometchat/calls-sdk-javascript";

const appId = "APP_ID";
const region = "REGION";

// Initialize Chat SDK
await CometChat.init(appId, new CometChat.AppSettingsBuilder()
  .subscribePresenceForAllUsers()
  .setRegion(region)
  .build()
);

// Initialize Calls SDK
await CometChatCalls.init({ appId, region });

// Login to both
await CometChat.login(uid, apiKey);
await CometChatCalls.login(uid, apiKey);

Initiate a Call

Start an outgoing call:

async function initiateCall(receiverUid, callType = "video") {
  const call = new CometChat.Call(
    receiverUid,
    callType === "video" ? CometChat.CALL_TYPE.VIDEO : CometChat.CALL_TYPE.AUDIO,
    CometChat.RECEIVER_TYPE.USER
  );

  try {
    const outgoingCall = await CometChat.initiateCall(call);
    console.log("Call initiated:", outgoingCall);
    
    // Show outgoing call UI
    showOutgoingCallScreen(outgoingCall);
    
    return outgoingCall;
  } catch (error) {
    console.error("Call initiation failed:", error);
    throw error;
  }
}

By default, an unanswered call automatically cancels after 45 seconds. You can customize this duration by passing an optional timeout parameter (in seconds) as the second argument to initiateCall().

JavaScript
TypeScript

const receiverID = "UID";
const callType = CometChat.CALL_TYPE.VIDEO;
const receiverType = CometChat.RECEIVER_TYPE.USER;

const call = new CometChat.Call(receiverID, callType, receiverType);

// Set a custom timeout of 60 seconds
CometChat.initiateCall(call, 60).then(
  (outgoingCall) => {
    console.log("Call initiated with 60s timeout:", outgoingCall);
  },
  (error) => {
    console.log("Call initiation failed:", error);
  }
);

const receiverID: string = "UID";
const callType: string = CometChat.CALL_TYPE.VIDEO;
const receiverType: string = CometChat.RECEIVER_TYPE.USER;

const call: CometChat.Call = new CometChat.Call(receiverID, callType, receiverType);

// Set a custom timeout of 60 seconds
CometChat.initiateCall(call, 60).then(
  (outgoingCall: CometChat.Call) => {
    console.log("Call initiated with 60s timeout:", outgoingCall);
  },
  (error: CometChat.CometChatException) => {
    console.log("Call initiation failed:", error);
  }
);

Parameter	Type	Description
`call`	`Call`	The call object created with receiver ID, call type, and receiver type.
`timeout`	`number`	Optional. The ringing duration in seconds before an unanswered call is automatically cancelled. Default: `45`.

Listen for Incoming Calls

const callListenerId = "CALL_LISTENER_ID";

CometChat.addCallListener(
  callListenerId,
  new CometChat.CallListener({
    onIncomingCallReceived: (incomingCall) => {
      console.log("Incoming call:", incomingCall);
      showIncomingCallScreen(incomingCall);
    },
    onOutgoingCallAccepted: (acceptedCall) => {
      console.log("Call accepted:", acceptedCall);
      startCallSession(acceptedCall.getSessionId());
    },
    onOutgoingCallRejected: (rejectedCall) => {
      console.log("Call rejected:", rejectedCall);
      hideOutgoingCallScreen();
    },
    onIncomingCallCancelled: (cancelledCall) => {
      console.log("Call cancelled:", cancelledCall);
      hideIncomingCallScreen();
    },
    onCallEndedMessageReceived: (endedCall) => {
      console.log("Call ended:", endedCall);
    },
  })
);

Accept an Incoming Call

async function acceptCall(incomingCall) {
  try {
    const acceptedCall = await CometChat.acceptCall(incomingCall.getSessionId());
    console.log("Call accepted:", acceptedCall);
    
    // Start the call session
    startCallSession(acceptedCall.getSessionId());
  } catch (error) {
    console.error("Accept call failed:", error);
  }
}

Reject an Incoming Call

async function rejectCall(incomingCall, reason = CometChat.CALL_STATUS.REJECTED) {
  try {
    await CometChat.rejectCall(incomingCall.getSessionId(), reason);
    console.log("Call rejected");
    hideIncomingCallScreen();
  } catch (error) {
    console.error("Reject call failed:", error);
  }
}

Cancel an Outgoing Call

async function cancelCall(outgoingCall) {
  try {
    await CometChat.rejectCall(outgoingCall.getSessionId(), CometChat.CALL_STATUS.CANCELLED);
    console.log("Call cancelled");
    hideOutgoingCallScreen();
  } catch (error) {
    console.error("Cancel call failed:", error);
  }
}

Start the Call Session

Once the call is accepted, join the session using the Calls SDK:

async function startCallSession(sessionId) {
  const container = document.getElementById("call-container");
  
  try {
    // Generate token
    const tokenResult = await CometChatCalls.generateToken(sessionId);
    
    // Join session
    await CometChatCalls.joinSession(
      tokenResult.token,
      {
        sessionType: "VIDEO",
        layout: "TILE",
      },
      container
    );
    
    // Listen for session end
    CometChatCalls.addEventListener("onSessionLeft", () => {
      endCall(sessionId);
    });
  } catch (error) {
    console.error("Failed to start call session:", error);
  }
}

End the Call

async function endCall(sessionId) {
  try {
    // Leave the Calls SDK session
    CometChatCalls.leaveSession();
    
    // End the call in Chat SDK
    await CometChat.endCall(sessionId);
    
    console.log("Call ended");
  } catch (error) {
    console.error("End call failed:", error);
  }
}

Incoming Call UI Example

function showIncomingCallScreen(call) {
  const caller = call.getCallInitiator();
  
  const html = `
    <div id="incoming-call" class="incoming-call-overlay">
      <div class="incoming-call-card">
        <img src="${caller.getAvatar()}" alt="${caller.getName()}" />
        <h3>${caller.getName()}</h3>
        <p>Incoming ${call.getType()} call...</p>
        <div class="call-actions">
          <button onclick="rejectCall(currentCall)" class="reject-btn">Decline</button>
          <button onclick="acceptCall(currentCall)" class="accept-btn">Accept</button>
        </div>
      </div>
    </div>
  `;
  
  document.body.insertAdjacentHTML("beforeend", html);
  window.currentCall = call;
  
  // Play ringtone
  playRingtone();
}

function hideIncomingCallScreen() {
  document.getElementById("incoming-call")?.remove();
  stopRingtone();
}

Outgoing Call UI Example

function showOutgoingCallScreen(call) {
  const receiver = call.getCallReceiver();
  
  const html = `
    <div id="outgoing-call" class="outgoing-call-overlay">
      <div class="outgoing-call-card">
        <img src="${receiver.getAvatar()}" alt="${receiver.getName()}" />
        <h3>${receiver.getName()}</h3>
        <p>Calling...</p>
        <button onclick="cancelCall(currentCall)" class="cancel-btn">Cancel</button>
      </div>
    </div>
  `;
  
  document.body.insertAdjacentHTML("beforeend", html);
  window.currentCall = call;
  
  // Play ringback tone
  playRingbackTone();
}

function hideOutgoingCallScreen() {
  document.getElementById("outgoing-call")?.remove();
  stopRingbackTone();
}

Cleanup

Remove the call listener when no longer needed:

CometChat.removeCallListener(callListenerId);

Overview

Integrations

Getting Started

Call Session

Features

Advanced

Migration Guide

Resources

Overview

Prerequisites

Initialize Both SDKs

Initiate a Call

Listen for Incoming Calls

Accept an Incoming Call

Reject an Incoming Call

Cancel an Outgoing Call

Start the Call Session

End the Call

Incoming Call UI Example

Outgoing Call UI Example

Cleanup

​Overview

​Prerequisites

​Initialize Both SDKs

​Initiate a Call

​Listen for Incoming Calls

​Accept an Incoming Call

​Reject an Incoming Call

​Cancel an Outgoing Call

​Start the Call Session

​End the Call

​Incoming Call UI Example

​Outgoing Call UI Example

​Cleanup

​Related Documentation

Overview

Prerequisites

Initialize Both SDKs

Initiate a Call

Listen for Incoming Calls

Accept an Incoming Call

Reject an Incoming Call

Cancel an Outgoing Call

Start the Call Session

End the Call

Incoming Call UI Example

Outgoing Call UI Example

Cleanup

Related Documentation