Invalidation helpers

Author: anconaesselmann

Sources/LoadableView/Protocols/Invalidate.swift

@@ -0,0 +1,35 @@
+//  Created by Axel Ancona Esselmann on 12/3/24.
+//
+
+import Combine
+
+public extension IDedLoadableViewModel {
+    func invalidate<P: Publisher>(on publisher: P) -> AnyCancellable
+        where P.Failure == Never, P.Output == ID
+    {
+        publisher
+            .eraseToAnyPublisher()
+            .filter { [weak self] observedId in
+                guard let id = self?.id else {
+                    return false
+                }
+                return observedId == id
+            }
+            .map { _ in return}
+            .sink { [weak self] in
+                self?.invalidate()
+            }
+    }
+}
+
+public extension BaseLoadableViewModel {
+    func invalidate<P: Publisher>(on publisher: P) -> AnyCancellable
+        where P.Failure == Never, P.Output == Void
+    {
+        publisher
+            .eraseToAnyPublisher()
+            .sink { [weak self] in
+                self?.invalidate()
+            }
+    }
+}

Sources/LoadableView/Protocols/LoadableView/BaseLoadableViewModel.swift

@@ -29,6 +29,7 @@ public protocol BaseLoadableViewModel: ObservableObject, AnyObject {
     func onDisappear()
     func setError(_ error: Error?)
     func setIsLoading(_ isLoading: Bool)
+    func invalidate()
 
     func refresh(showLoading: Bool)
     func refresh(on changePublisher: AnyPublisher<ObservationType, Never>, showLoading: Bool) -> AnyCancellable