Alert receiver channel which does not alert if a message queued

mirthSourceTransformer.js

//can use this to get the message content and check state and send attempts
// we have channelId and messageId
// pass metadataIds as null -> the connector message returned will then have one or many connector messages. #0 is the source, and source has connectorMessage.getDestinationIdMap(); which we can iterate to turn our connector name into the numeric metadata id
var shouldAlert = true;
var metaDataIds = null;
var alertedChannelId = msg['channelId'];
var messageId = parseInt(msg['messageId']);
var messageController = Packages.com.mirth.connect.server.controllers.messageController.getInstance();
var message = messageController.getMessageContent(alertedChannelId, messageId, metaDataIds);
var sourceMessage = message.getConnectorMessages().get(0);

if(msg['errorType'] == 'Destination Connector'){
	var connectorName = msg['connector']
	var destinationId = sourceMessage.getDestinationIdMap().get(connectorName);
	var destinationMessage = message.getConnectorMessages().get(destinationId);
	var sendAttempts = destinationMessage.getSendAttempts();
	$c('sendAttempts', sendAttempts);
	var tooManySendAttempts = (sendAttempts > parseInt($('sendAttemptsLimit'))); //TODO check if > or >=
	$c('tooManySendAttempts', tooManySendAttempts);
	var mirthMessageErrored = (destinationMessage.getStatus() == com.mirth.connect.donkey.model.message.Status.ERROR);	
	$c('mirthMessageErrored', mirthMessageErrored);

	var mirthMessageSent = (destinationMessage.getStatus() == com.mirth.connect.donkey.model.message.Status.SENT);
	$c('mirthMessageSent', mirthMessageSent);

	shouldAlert = !mirthMessageSent && ( tooManySendAttempts || mirthMessageErrored );
}  

//should always alert for source messages
//should alert for destination messages that exceed send attempts limit
if(!shouldAlert){
	destinationSet.removeAll();
}