Integrate flashcard list into deck view

WordAX/Views/Flashcards/FlashCardListView.swift

@@ -6,15 +6,18 @@
 //
 
 import SwiftUI
+import CoreData
 
 struct FlashCardListView: View {
     @State var showDescription = true
-    @State var addFlashcard = false
-    @FetchRequest(sortDescriptors: [NSSortDescriptor(key: "favorite", ascending: false), NSSortDescriptor(key: "dateAdded", ascending: false)]) var flashcards: FetchedResults<Flashcard>
+    @State var addFlashcard: Bool = false
+    @State var flashcards: [Flashcard] = []
+    var deck: Deck?
     @Environment(\.managedObjectContext) var moc
+    
     var body: some View {
         GeometryReader { geometry in
-            NavigationSplitView {
+            NavigationStack {
                 Group {
                     if !flashcards.isEmpty {
                         List {
@@ -29,6 +32,7 @@ struct FlashCardListView: View {
                                 for index in offsets {
                                     let flashcard = flashcards[index]
                                     moc.delete(flashcard)
+                                    flashcards.remove(at: index)
                                 }
                                 
                                 do {
@@ -39,16 +43,27 @@ struct FlashCardListView: View {
                             })
                         }
                     } else {
-                        Text("You currently don't have any flashcards. To add flashcards, either click at the '+' button at the top or you can download them from the store (coming soon)")
-                            .padding()
-                            .background(.purple)
-                            .clipShape(.buttonBorder)
-                            .frame(maxWidth: geometry.size.width - 30)
+                        Group {
+                            Text("You currently don't have any flashcards. To add flashcards, either click at the '+' button at the top or you can download them from the store (coming soon)")
+                                .padding()
+                                .background(.purple)
+                                .clipShape(.buttonBorder)
+                        }
+                        .frame(maxHeight: .infinity)
+                        .padding(.horizontal)
                     }
                 }
-                .navigationTitle("All Flashcards")
+                .onAppear {
+                    refreshFlashcards()
+                }
+                .onChange(of: addFlashcard, { oldValue, newValue in
+                    if oldValue {
+                        refreshFlashcards()
+                    }
+                })
+                .navigationBarTitle(deck?.name ?? "All Flashcards", displayMode: deck != nil ? .inline : .automatic)
                 .toolbar {
-                    ToolbarItemGroup(placement: .topBarLeading) {
+                    ToolbarItemGroup(placement: .topBarTrailing) {
                         EditButton()
                     }
                     ToolbarItemGroup(placement: .topBarTrailing) {
@@ -59,14 +74,29 @@ struct FlashCardListView: View {
                         }
                     }
                 }
-            } detail: {
-                Text("Select flashcard to get details about")
             }
             .sheet(isPresented: $addFlashcard, content: {
-                AddFlashCardView(isShowing: $addFlashcard)
+                AddFlashCardView(isShowing: $addFlashcard, selectedDeck: deck)
             })
         }
     }
+    
+    private func refreshFlashcards() {
+        let request = NSFetchRequest<Flashcard>(entityName: "Flashcard")
+        request.sortDescriptors = [NSSortDescriptor(key: "favorite", ascending: false), NSSortDescriptor(key: "dateAdded", ascending: false)]
+        if deck != nil {
+            request.predicate = NSPredicate(format: "deck == %@", deck!)
+            //                        flashcards = deck?.flashcards?.allObjects as? [Flashcard] ?? []
+        }
+        do {
+            flashcards = try moc.fetch(request)
+            print(flashcards)
+        } catch {
+            print("Something went wrong while fetching the flashcards")
+            flashcards = []
+        }
+    }
+
 }
 
 #Preview {