Improve page indicators, adding items

CHDataManagement/Views/Posts/AddPostView.swift

@@ -17,18 +17,16 @@ struct AddPostView: View {
     @State
     private var newPostId = ""
 
-    private let allowedCharactersInPostId = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "-")).inverted
-
     init(selected: Binding<Post?>) {
         self._selectedPost = selected
     }
 
     private var idExists: Bool {
-        content.posts.contains { $0.id == newPostId }
+        !content.isNewIdForPost(newPostId)
     }
 
-    private var containsInvalidCharacters: Bool {
-        newPostId.rangeOfCharacter(from: allowedCharactersInPostId) != nil
+    private var isInvalidId: Bool {
+        !content.isValidIdForTagOrPageOrPost(newPostId)
     }
 
     var body: some View {
@@ -45,7 +43,7 @@ struct AddPostView: View {
             } else if idExists {
                 Text("A post with the same id already exists")
                     .foregroundStyle(Color.red)
-            } else if containsInvalidCharacters {
+            } else if isInvalidId {
                 Text("The id contains invalid characters")
                     .foregroundStyle(Color.red)
             } else {
@@ -59,7 +57,7 @@ struct AddPostView: View {
                 Button(action: addNewPost) {
                     Text("Create")
                 }
-                .disabled(newPostId.isEmpty || containsInvalidCharacters || idExists)
+                .disabled(isInvalidId || idExists)
             }
         }
         .padding()

CHDataManagement/Views/Posts/PostListView.swift

@@ -35,7 +35,7 @@ struct PostListView: View {
                     Text(post.title(in: language))
                     Spacer()
                     if post.isDraft {
-                        DraftIndicator()
+                        TextIndicator(text: "Draft")
                     }
                 }.tag(post)
             }

CHDataManagement/Views/Posts/TagSelectionView.swift

@@ -69,9 +69,6 @@ struct TagSelectionView: View {
             return
         }
         selected.remove(at: index)
-
-        let insertIndex = tags.firstIndex(where: { $0 > tag }) ?? tags.endIndex
-        tags.insert(tag, at: insertIndex)
     }
 
     private func select(tag: Tag) {