Present action sheet to confirm logout

Shared/Account/AccountLogoutView.swift

@@ -2,6 +2,10 @@ import SwiftUI
 
 struct AccountLogoutView: View {
     @EnvironmentObject var model: WriteFreelyModel
+    @Environment(\.managedObjectContext) var moc
+
+    @State private var isPresentingLogoutConfirmation: Bool = false
+    @State private var editedPostsWarningString: String = ""
 
     var body: some View {
         VStack {
@@ -15,10 +19,35 @@ struct AccountLogoutView: View {
                 Text("Log Out")
             })
         }
+        .actionSheet(isPresented: $isPresentingLogoutConfirmation, content: {
+            ActionSheet(
+                title: Text("Log Out?"),
+                message: Text("\(editedPostsWarningString)You won't lose any local posts. Are you sure?"),
+                buttons: [
+                    .destructive(Text("Log Out"), action: {
+                        model.logout()
+                    }),
+                    .cancel()
+                ]
+            )
+        })
     }
 
     func logoutHandler() {
-        model.logout()
+        let request = WFAPost.createFetchRequest()
+        request.predicate = NSPredicate(format: "status == %i", 1)
+        do {
+            let editedPosts = try LocalStorageManager.persistentContainer.viewContext.fetch(request)
+            if editedPosts.count == 1 {
+                editedPostsWarningString = "You'll lose unpublished changes to \(editedPosts.count) edited post. "
+            }
+            if editedPosts.count > 1 {
+                editedPostsWarningString = "You'll lose unpublished changes to \(editedPosts.count) edited posts. "
+            }
+        } catch {
+            print("Error: failed to fetch cached posts")
+        }
+        self.isPresentingLogoutConfirmation = true
     }
 }