diff --git a/Shared/Navigation/ContentView.swift b/Shared/Navigation/ContentView.swift
index 54d5d20..5611edb 100644
--- a/Shared/Navigation/ContentView.swift
+++ b/Shared/Navigation/ContentView.swift
@@ -1,31 +1,39 @@
 import SwiftUI
 
 struct ContentView: View {
     @ObservedObject var postStore: PostStore
     @State private var selectedCollection: PostCollection = allPostsCollection
 
     var body: some View {
         NavigationView {
             VStack {
                 PostList(title: selectedCollection.title)
                     .frame(maxHeight: .infinity)
                     .toolbar {
                         NavigationLink(destination: PostEditor(post: Post())) {
                             Image(systemName: "plus")
                         }
                 }
                 CollectionPicker(selectedCollection: $selectedCollection)
             }
 
             Text("Select a post, or create a new draft.")
                 .foregroundColor(.secondary)
         }
         .environmentObject(postStore)
     }
+
+    func showPosts(for: PostCollection) -> [Post] {
+        if selectedCollection == allPostsCollection {
+            return postStore.posts
+        } else {
+            return postStore.posts.filter { $0.collection.title == selectedCollection.title }
+        }
+    }
 }
 
 struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
         ContentView(postStore: testPostStore)
     }
 }