Sitecore CDP: DecisionModel: the sample programmable java-script to prepare a payload to trigger Sitecore Send (Moosend). Thanks to brimit for initial code sample.

cdp-send.js

(function () 
 {
   var fallbackImage = "https://mydemo.blob.core.windows.net/assets/b98a38c3-b757-5a2d-ad32-cf64c37ef0f5";
   var defaultWebsite = '0af7e4acd0454226bcc982ec8de42a38';
   var perfumeWebsiteId = '426efbad-a306-4cf2-9071-1a847285773e';

   var websiteId = defaultWebsite;

   // detect the website by pointOfSale
   if (entity && entity.pointOfSale == 'cdn-send-test-pos') {
   websiteId = perfumeWebsiteId;
 }
 
 print('website', websiteId);
 
 //#region Tools
 
 function toArray(arr) {
   if (!arr || !arr.length) {
   return [];
 }
 var result = [];
 for (var i = 0; i < arr.length; i++) {
     result.push(arr[i]);
 }
 return result;
 }
 
 // Polyfill array.find
 if (!Array.prototype.find) {
   Array.prototype.find = function (predicate) {
   if (this === null) {
      throw new TypeError('null or undefined');
 }
 if (typeof predicate !== 'function') {
    throw new TypeError('predicate must be a function');
 }
 var list = Object(this);
 var length = list.length >>> 0;
 var thisArg = arguments[1];
 var value;
 
 for (var i = 0; i < length; i++) {
   value = list[i];
   if (predicate.call(thisArg, value, i, list)) {
      return value;
    }
 }
 return undefined;
 };
 }
 
 function mapProduct(entity, skipQuantity) {
 var ext = entity.arbitraryData.product.ext;
 var result = {
     itemCode: entity.arbitraryData.product.productId,
     itemPrice: entity.arbitraryData.product.price,
     itemUrl: "https://" + entity.pointOfSale + entity.arbitraryData.page,
     itemName: entity.arbitraryData.product.name,
     itemImage: (ext && ext.image) || (ext && ext.thumbnail) || fallbackImage,
     currencyCode: entity.arbitraryData.product.currencyCode,
 };
 if (!skipQuantity) {
   result.itemQuantity = entity.arbitraryData.product.quantity;
   result.itemTotalPrice = entity.arbitraryData.product.price * entity.arbitraryData.product.quantity;
 }
 return result;
 }
 
 function mapAddEvent(entity, response) {
     response.actionType = "ADDED_TO_ORDER";
     response.Url = "https://" + entity.pointOfSale + entity.arbitraryData.page;
     response.properties = {
        product: mapProduct(entity)
     }
     return response;
 }
 
 function getAllAddEvents(sessionId) {
     var session = toArray(guest.sessions).find(x => x.ref == sessionId);
     if (!session) {
        return [];
     }
     return toArray(session.events).filter(x => x.type == 'ADD');
 }
 
 function getAllViewEvents(sessionId) {
    var session = toArray(guest.sessions).find(x => x.ref == sessionId);
   if (!session) {
      return [];
   }
   return toArray(session.events).filter(x => x.type == 'VIEW' && x.arbitraryData && x.arbitraryData.product && x.arbitraryData.product.productId);
 }
 
 function getAllProductsFromSession(sessionId) {
    return getAllAddEvents(sessionId).map(e => mapProduct(e));
 }
 
 //#endregion
 
 if (!guest.email && entity.type != 'VIEW') {
   print('Unknown user');
   return {
     data: [],
     json: JSON.stringify([])
   }
 }
 
 var send_event = {
     ContactId: guest.ref,
     actionType: "register",
     sessionId: sessionId,
     siteId: websiteId,
     ContactEmailAddress: guest.email
 };
 
 if (guest.email) {
    send_event.ContactEmailAddress = guest.email;
 }
 
 if (entity === undefined || !entity.type) {
   entity = {
     type: "IDENTITY",
   };
 }
 
 print('entity', entity);
 
 if (entity.type == "ADD" || entity.type == "CHECKOUT" || entity.type == "VIEW") {
 
 send_event.sessionId = entity.sessionRef;
 
 if (entity.type == "ADD") {
    mapAddEvent(entity, send_event);
 }
 else if (entity.type == "CHECKOUT") {
 send_event.actionType = "ORDER_COMPLETED";
 send_event.Url = "https://" + entity.pointOfSale + entity.arbitraryData.page;
 var products = getAllProductsFromSession(entity.sessionRef);
 if (products.length > 0) {
   send_event.properties = [{
      products: products
   }];
 } else {
    send_event.actionType = "ORDER_COMPLETED_EMPTY";
 }
 } else if (entity.type == "VIEW" && entity.arbitraryData && entity.arbitraryData.product && entity.arbitraryData.product.productId) {
   // https://help.moosend.com/hc/en-us/articles/4413852278162-Install-website-tracking-by-using-the-JS-tracking-library
   send_event.actionType = "PAGE_VIEWED";
   send_event.Url = "https://" + entity.pointOfSale + entity.arbitraryData.page;
   products = [{
   product: mapProduct(entity, true)
 }];
 
 send_event.properties = products;
 
 } else {
   return {
   data: [],
   json: JSON.stringify([])
  }
 }
 }
 
 if (entity.type == "IDENTITY") {
 send_event.actionType = 'IDENTIFY';
 send_event.sessionId = entity.sessionRef;
 var actions = [send_event];
 var viewEvents = getAllViewEvents(entity.sessionRef);
 print('getAllViewEvents', viewEvents.length);
 for (var j = 0; j < viewEvents.length; j++) {
   actions.push({
   actionType: 'PAGE_VIEWED',
   Url: "https://" + viewEvents[j].pointOfSale + viewEvents[j].arbitraryData.page,
   properties: [{
   product: mapProduct(viewEvents[j], true)
   }]
 });
 }
 var productEvents = getAllAddEvents(entity.sessionRef);
 print('getAllAddEvents', productEvents.length);
 for (var i = 0; i < productEvents.length; i++) {
   actions.push(mapAddEvent(productEvents[i], {
   ContactId: send_event.ContactId,
   sessionId: send_event.sessionId,
   siteId: send_event.siteId,
   ContactEmailAddress: send_event.ContactEmailAddress
 }))
 }
 print(actions);
 return {
   data: actions,
   json: JSON.stringify(actions),
   }
 }
 
 print(JSON.stringify(send_event));
 return {
   data: [send_event],
   json: JSON.stringify([send_event])
 }
 })();