From 6beee8cf3216347836fc35b8bc01aafa9a667880 Mon Sep 17 00:00:00 2001
From: Angelo Stavrow <contact@angelostavrow.com>
Date: Tue, 19 Jan 2021 10:33:25 -0500
Subject: [PATCH] Prevent AppStorage updates if there's no change

---
 Shared/PostCollection/CollectionListView.swift | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/Shared/PostCollection/CollectionListView.swift b/Shared/PostCollection/CollectionListView.swift
index abe1f8b..aebe15f 100644
--- a/Shared/PostCollection/CollectionListView.swift
+++ b/Shared/PostCollection/CollectionListView.swift
@@ -78,12 +78,26 @@ struct CollectionListView: View {
         )
         .listStyle(SidebarListStyle())
         .onChange(of: model.selectedCollection) { collection in
-            self.selectedCollectionURL = collection?.objectID.uriRepresentation()
+            if collection != fetchSelectedCollectionFromAppStorage() {
+                self.selectedCollectionURL = collection?.objectID.uriRepresentation()
+            }
         }
         .onChange(of: model.showAllPosts) { value in
-            self.showAllPostsFlag = model.showAllPosts
+            if value != showAllPostsFlag {
+                self.showAllPostsFlag = model.showAllPosts
+            }
         }
     }
+
+    private func fetchSelectedCollectionFromAppStorage() -> WFACollection? {
+        guard let objectURL = selectedCollectionURL else { return nil }
+        let coordinator = LocalStorageManager.persistentContainer.persistentStoreCoordinator
+        guard let managedObjectID = coordinator.managedObjectID(forURIRepresentation: objectURL) else { return nil }
+        guard let object = LocalStorageManager.persistentContainer.viewContext.object(
+                with: managedObjectID
+        ) as? WFACollection else { return nil }
+        return object
+    }
 }
 
 struct CollectionListView_LoggedOutPreviews: PreviewProvider {