protected override string Process(string data)
{
// only act on front-end requests
if (UmbracoContext.Current.PageId == null || !UmbracoContext.Current.IsFrontEndUmbracoRequest)
{
return(data);
}
// get the current requested node
int pageId = UmbracoContext.Current.PageId.Value;
string contentTypeAlias = UmbracoContext.Current.PublishedContentRequest?.PublishedContent?.DocumentTypeAlias;
List <PromoModel> modules = _promoService.GetValidPromos(pageId, contentTypeAlias);
if (!modules.Any())
{
return(data);
}
var doc = new HtmlDocument();
doc.LoadHtml(data);
HtmlNode root = doc.DocumentNode;
HtmlNode body = root.SelectSingleNode("//body");
// get the stored markup for each module and append to the document body, in an identifiable wrapper
foreach (PromoModel module in modules)
{
HtmlNode promoteElm = doc.CreateElement("promote-node");
promoteElm.SetAttributeValue("data-selector", module.Selector);
promoteElm.SetAttributeValue("data-attach", module.Attach);
promoteElm.SetAttributeValue("style", "display:none!important");
var moduleDoc = new HtmlDocument();
// manage a-b split here - if current module has an a-b match, maybe use it
// a-b will use markup for either, but in the location of the current module, so styles/js need to work for both modules
PromoModel[] options = { module, _promoService.GetBForA(module.Ab) };
moduleDoc.LoadHtml(options.Last() != null ? options[Random.Next(options.Length)].Markup : module.Markup);
HtmlNode moduleMarkup = moduleDoc.DocumentNode;
promoteElm.AppendChild(moduleMarkup);
body.AppendChild(promoteElm);
}
// append script reference if modules exist for the page
// script is minified from the frontend.js file in the app_plugin folder
HtmlNode scriptNode = HtmlNode.CreateNode(
"<script>" +
"window.addEventListener(\"load\",function(){var e=document.querySelectorAll(\"promote-node\");e&&e.forEach(function(e){var r=e.dataset.attach,t=document.querySelector(e.dataset.selector);if(t&&r)switch(r){case\"first\":t.insertBefore(e.children[0],t.firstChild);break;case\"last\":t.appendChild(e.children[0]);break;case\"before\":t.parentNode.insertBefore(e.children[0],t);break;default:t.parentNode.insertBefore(e.children[0],t.nextSibling)}e.parentNode.removeChild(e)})});" +
"</script>"
);
body.AppendChild(scriptNode);
data = root.OuterHtml;
return(data);
}
