feat: sync Rokt session ID to mParticle via setIntegrationAttribute

src/Rokt-Kit.js

@@ -412,10 +412,40 @@ var constructor = function () {
             attributes: selectPlacementsAttributes,
         });
 
-        // Log custom event for selectPlacements call
-        logSelectPlacementsEvent(selectPlacementsAttributes);
+        var selection = self.launcher.selectPlacements(selectPlacementsOptions);
+
+        // After selection resolves, sync the Rokt session ID back to mParticle
+        // as an integration attribute so server-side integrations can link events.
+        // We log the custom event AFTER setting the attribute because
+        // setIntegrationAttribute alone doesn't fire a network request —
+        // if the user closes the page before another event fires, the server
+        // would never receive the session ID.
+        if (selection && typeof selection.then === 'function') {
+            selection
+                .then(function (sel) {
+                    if (sel && sel.context && sel.context.sessionId) {
+                        sel.context.sessionId
+                            .then(function (sessionId) {
+                                _setRoktSessionId(sessionId);
+                                logSelectPlacementsEvent(
+                                    selectPlacementsAttributes
+                                );
+                            })
+                            .catch(function () {
+                                logSelectPlacementsEvent(
+                                    selectPlacementsAttributes
+                                );
+                            });
+                    } else {
+                        logSelectPlacementsEvent(selectPlacementsAttributes);
+                    }
+                })
+                .catch(function () {
+                    logSelectPlacementsEvent(selectPlacementsAttributes);
+                });
+        }
 
-        return self.launcher.selectPlacements(selectPlacementsOptions);
+        return selection;
     }
 
     /**
@@ -525,6 +555,25 @@ var constructor = function () {
         }
     }
 
+    function _setRoktSessionId(sessionId) {
+        if (!sessionId || typeof sessionId !== 'string') {
+            return;
+        }
+        try {
+            var mpInstance = window.mParticle.getInstance();
+            if (
+                mpInstance &&
+                typeof mpInstance.setIntegrationAttribute === 'function'
+            ) {
+                mpInstance.setIntegrationAttribute(moduleId, {
+                    roktSessionId: sessionId,
+                });
+            }
+        } catch (e) {
+            // Best effort — never let this break the partner page
+        }
+    }
+
     function onUserIdentified(filteredUser) {
         self.filters.filteredUser = filteredUser;
         self.userAttributes = filteredUser.getAllUserAttributes();