updates for polling

MVMCore/MVMCore/AlertHandling/MVMCoreAlertHandler+Extension.swift

@@ -63,4 +63,28 @@ public extension MVMCoreAlertHandler {
             }
         }
     }
+    
+    /// Checks for existing same top alert objects and update it.
+    func checkAndUpdateExisting(with topAlertObject: MVMCoreTopAlertObject) -> Bool {
+        for case let operation as MVMCoreTopAlertOperation in topAlertQueue.operations {
+            guard topAlertObject.json != nil,
+               operation.topAlertObject.type == topAlertObject.type else { continue }
+            guard !operation.isCancelled else {
+                // old is already cancelled, add new
+                operation.reAddAfterCancel = false
+                return false
+            }
+            guard operation.isExecuting else {
+                // not currently executing... cancel old, add new
+                operation.cancel()
+                return false
+            }
+            // update existing and view
+            // how to update dismiss time?
+            // how to update view? what if molecule is different?
+            
+            
+        }
+        return false
+    }
 }