choose_an_action

rule send_email_to_owner {
  select when fuse email_for_owner
  pre {

    me = pds:get_all_me();
    fleet_backchannel = CloudOS:subscriptionList(common:namespace(),"Fleet").head().pick("$.backChannel").defaultsTo("");

    subj = event:attr("subj").defaultsTo("Message from Fuse");
    msg = event:attr("msg").defaultsTo("This email contains no message");
    html = event:attr("html").defaultsTo(msg);
    recipient =  me{"myProfileEmail"}.klog(">>>> email address >>>>") ;
    attachment = event:attr("attachment");
    filename = event:attr("filename").defaultsTo("attached_file");

    mailtype = attachment.isnull() => "html"
                                    | "attachment";

  }
  if( meta:eci() eq fleet_backchannel
   && not msg.isnull()
    ) then
      choose mailtype {
        html       => sendgrid:sendhtml(me{"myProfileName"}, recipient, subj, msg, html);
        attachment => sendgrid:sendattachment(me{"myProfileName"}, recipient, subj, msg, filename, attachment);
      }
}

Whoa, this changes everything!

Course the more elegant way to solve this problem is to rewrite sendgrid:send() with a nice configure statement to allow optional parameters and put all this inside the action itself.

No like button on Gist comments Randall, or you're get one. :)