Hello,

I have an Apex class sending slack notification to a channel and I would like to update the code to send the notification to multiple slack channels.

Is Anyone familiar with Slack integration?

Here is my code

public without sharing class SlackNotificationSupport{
       
    public class slackRequest { 
        @InvocableVariable(label='caseNumber')
        public String caseNumber;
        @InvocableVariable(label='status')
        public String status;
        @InvocableVariable(label='nickName')
        public String nickname;
        @InvocableVariable(label='queue')
        public String queue;
        @InvocableVariable(label='accountTier')
        public String accountTier;
        @InvocableVariable(label='accountName')
        public String accountName;
        @InvocableVariable(label='subject')
        public String subject;
        @InvocableVariable(label='businessUnit')
    	public String businessUnit;
    } 
    

    public static String setChannelName(String queue) {

        String channelName;

        channelName = '#'+queue;
        channelName = channelName.toLowerCase('en');
        channelName = channelName.replaceAll('queue', 'bot');
        channelName = channelName.replaceAll('[_]', '-');
        return channelName;
    }

    @InvocableMethod(label='Publish to Slack')
    public static void publishToSlack(List<slackRequest> requests) {

        String webhookURL = system.label.Param_Slack_Token;
        String msg;
        String channelName;

        for(slackRequest r:requests){

            if (r.queue == 'internal'){
                System.debug('### SlackNotificationSupport new internal case');
                channelName = '#'+Label.Slack_Internal_Case_Channel;
                msg = 'A new internal case has been created : *'+r.caseNumber+'* - By User : (*'+r.accountName+'*) - Subject : (*'+r.subject+'*)';                
            }
            else if (r.queue == 'caseconcern'){
                System.debug('### SlackNotificationSupport new case concern');
                channelName = '#'+Label.Slack_Case_Concern_Channel;
                
                msg = 'A new Case Concern has been created : *'+r.caseNumber+'* - By User : (*'+r.nickName+' '+r.accountName+'* From *'+r.accountTier+'*) - Category : (*'+r.subject+'*)';
				msg += '\nLink to Case Concern : '+URL.getOrgDomainUrl().toExternalForm()+'/'+r.status;
                
            }
            // Team Leads
            else if (r.queue == 'Queue Team Leads') {
                channelName = setChannelName(r.queue);
                msg = 'A customer has opened a new case.\n>>>*'+
                    r.caseNumber+'* - '+r.subject;
                    System.debug('### SlackNotificationSupport Queue Team Leads');
            } // New Tier 1 Ticker
            else if (r.accountTier == 'Tier 1' && r.accountName != null && r.queue != null) {
                System.debug('### SlackNotificationSupport New Tier 1');
                channelName = setChannelName(r.queue);
                msg = 'The customer '+r.accountTier+' - *'+r.accountName+'* has opened a new case.\n>>>*'+
                    r.caseNumber+'* - '+r.subject;
            }// Assigned ticket, status to Open - Internal notification for awaiting feedback cases
            else if (r.nickname != null && r.status != null && r.caseNumber != null) {
                System.debug('### SlackNotificationSupport  Status x to Open');
                channelName = '@'+r.nickname;
                if(r.queue == 'internal_notification')msg = 'Salesforce Internal Case number *'+r.caseNumber+'* related to : *'+r.subject+'* - Status changed to : *'+r.status+'*.';
                else msg = 'Case number *'+r.caseNumber+'* has become '+r.status+'.';
            }

            // Generate JSON for request
            try {
                if (r.queue != null || r.nickname != null) {
                    System.debug('### SlackNotificationSupport Sending message');
                    JSONGenerator gen = JSON.createGenerator(true);
                    gen.writeStartObject(); //Inserts {
                    gen.writeStringField('text', msg);
                    gen.writeStringField('channel', channelName);
                    gen.writeStringField('username', 'bot-support');
                    gen.writeStringField('icon_emoji', ':smartplus:');
                    gen.writeEndObject(); //Inserts }
                    String body = gen.getAsString(); //Translates JSONGenerator to string to be passed to callout
                    System.debug('### SlackNotificationSupport body: '+ body);
                    System.enqueueJob(new qCallOut(webhookURL, 'POST', body)); // Send request
                }
                else {
                    System.debug('### SlackNotificationSupport Queue = '+ r.queue);
                    return;
                }
            } // try    
            catch (exception e){
                system.debug('### SlackNotificationSupport error:' + e);
            }
        } 
    }
   

    public class qCallOut implements System.Queueable, Database.AllowsCallouts {
         
        private final String url;
        private final String method;
        private final String body;
         
        public qCallOut(String url, String method, String body) {
            this.url = url;
            this.method = method;
            this.body = body;
        }
         
        public void execute(System.QueueableContext ctx) {
            HttpRequest req = new HttpRequest();
            req.setEndpoint(url);
            req.setMethod(method);
            req.setBody(body);
            Http http = new Http();
            // to pass when process builder is invoked by another test class
            if(!Test.isRunningTest()){  
              HttpResponse res = http.send(req);
            }
        }
    }
}