From 41665b1060f517353bc128a1e3148f7bbd6b41b9 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Thu, 7 Sep 2023 18:04:08 -0400
Subject: [PATCH] Indicate that edit history may be incomplete for remote posts

Closes #385
---
 .../StatusEditHistoryViewController.swift         | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Tusker/Screens/Status Edit History/StatusEditHistoryViewController.swift b/Tusker/Screens/Status Edit History/StatusEditHistoryViewController.swift
index 10321b49..10c957aa 100644
--- a/Tusker/Screens/Status Edit History/StatusEditHistoryViewController.swift	
+++ b/Tusker/Screens/Status Edit History/StatusEditHistoryViewController.swift	
@@ -48,6 +48,10 @@ class StatusEditHistoryViewController: UIViewController, CollectionViewControlle
             }
             return config
         }
+        if let status = mastodonController.persistentContainer.status(for: statusID),
+           status.url?.host != mastodonController.instanceURL.host {
+            config.footerMode = .supplementary
+        }
         let layout = UICollectionViewCompositionalLayout { sectionIndex, environment in
             let section = NSCollectionLayoutSection.list(using: config, layoutEnvironment: environment)
             if UIDevice.current.userInterfaceIdiom == .pad || UIDevice.current.userInterfaceIdiom == .mac {
@@ -77,7 +81,7 @@ class StatusEditHistoryViewController: UIViewController, CollectionViewControlle
         let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, indexPath, itemIdentifier in
             cell.indicator.startAnimating()
         }
-        return UICollectionViewDiffableDataSource(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
+        let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
             switch itemIdentifier {
             case .edit(let edit, let state, index: let index):
                 return collectionView.dequeueConfiguredReusableCell(using: editCell, for: indexPath, item: (edit, state, index))
@@ -85,6 +89,15 @@ class StatusEditHistoryViewController: UIViewController, CollectionViewControlle
                 return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
             }
         }
+        let footerCell = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionFooter) { supplementaryView, elementKind, indexPath in
+            var config = supplementaryView.defaultContentConfiguration()
+            config.text = "Edit history for posts originating from instances other than your own may not be complete."
+            supplementaryView.contentConfiguration = config
+        }
+        dataSource.supplementaryViewProvider = { collectionView, elementKind, indexPath in
+            return collectionView.dequeueConfiguredReusableSupplementary(using: footerCell, for: indexPath)
+        }
+        return dataSource
     }
     
     override func viewWillAppear(_ animated: Bool) {