Add content filtering for in app messages

frontend/express/views/dashboard.html

@@ -2005,7 +2005,36 @@ <h4><a href="#/analytics/events/key/{{encodeURIComponent this.name}}">{{this.nam
         if (countlyGlobal.tracking.server_feedback) {
            //display in app messages
             if (Countly.content && Countly.content.enterContentZone) {
-                Countly.content.enterContentZone();
+                Countly.user_details({custom:{content_messages:true}}); // Ensure user is eligible for content messages
+                Countly.content.enterContentZone(function(params){
+                    if (params.journeyId && (params.widget_id || params.id)) {
+                        try {
+                            var check = params.journeyId + "_";
+                            if  (params.widget_id) {
+                                check += "widget_" + params.widget_id;
+                            }
+                            else {
+                                check += "content_" + params.id;
+                            }
+                            var key = "cly_seenJourneyIds_c2VlbkpvdXJuZXlJZHM"; // Base64 for 'seenJourneyIds' to avoid potential key conflicts
+                            var seen = JSON.parse(localStorage.getItem(key) || "[]");
+
+                            if (seen.includes(check)) {
+                                return false;
+                            }
+
+                            seen.push(check);
+                            localStorage.setItem(key, JSON.stringify(seen));
+                            return true;
+                        }
+                        catch (e) {
+                            // Handle localStorage errors (disabled, full, security exceptions in private browsing)
+                            // Fail open - allow content to be shown if we can't track it
+                            return false;
+                        }
+                    }
+                    return false;
+                });
             }
         }
     }