From 2300b13b66a34f7e443b3c3dbae7f7cbfb618403 Mon Sep 17 00:00:00 2001
From: Noel <ndaz@cambridge.org>
Date: Thu, 16 Apr 2026 11:03:10 +0800
Subject: [PATCH 1/2] Fix file usages not working for s3 files.

---
 src/Plugin/Usage/FileUsage.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Plugin/Usage/FileUsage.php b/src/Plugin/Usage/FileUsage.php
index 640407ab..7b21e04c 100644
--- a/src/Plugin/Usage/FileUsage.php
+++ b/src/Plugin/Usage/FileUsage.php
@@ -112,7 +112,7 @@ public function __construct(
 
     // This regex now handles spaces in filenames.
     $this->uriRegex = '/(?<!"preview_image":{"id":")((' . implode('|', array_keys($this->wrappers)) . '):\/\/(.*?)\.(.*?))([\s|:"*?<>|\\\\]|$)/m';
-    $this->mediaReferenceRegex = '/\[media-reference:file:(.*?)\]/m';
+    $this->mediaReferenceRegex = '#(?:<img[^>]*data-entity-uuid=\\\"([^"]+)\\\"[^>]*src=\\\"([^"]+)\\\"|\[media-reference:file:([^\]]+)\])#i';
     $this->fileRepository = $fileRepository;
   }
 

From 1fb4e7cae1421f649945e6f5517657077c166456 Mon Sep 17 00:00:00 2001
From: Noel <ndaz@cambridge.org>
Date: Fri, 17 Apr 2026 09:12:51 +0800
Subject: [PATCH 2/2] Fix file usage on scenario where all files are remove on
 a page.

---
 src/Plugin/Usage/FileUsage.php | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/Plugin/Usage/FileUsage.php b/src/Plugin/Usage/FileUsage.php
index 7b21e04c..ffc36bbe 100644
--- a/src/Plugin/Usage/FileUsage.php
+++ b/src/Plugin/Usage/FileUsage.php
@@ -187,6 +187,16 @@ private function getFileEntityByUuid($uuid) {
   private function registerCoreFileUsage($files, EntityInterface $entity) {
 
     if ($entity->id() && strlen($entity->id()) < 32) {
+
+      // Load previously referenced file IDs so we can invalidate their cache.
+      $existingFids = $this->connection->select('file_usage', 'fu')
+        ->fields('fu', ['fid'])
+        ->condition('module', 'cohesion')
+        ->condition('type', $entity->getEntityTypeId())
+        ->condition('id', $entity->id())
+        ->execute()
+        ->fetchCol();
+
       // Remove 'cohesion' registered usage of all files for scanned entity.
       try {
         $this->connection->delete('file_usage')
@@ -199,6 +209,14 @@ private function registerCoreFileUsage($files, EntityInterface $entity) {
         return;
       }
 
+      // Invalidate cache for files that were previously referenced.
+      if (!empty($existingFids)) {
+        $existingFiles = $this->storage->loadMultiple($existingFids);
+        foreach ($existingFiles as $existingFile) {
+          $this->refreshFileListCache($existingFile);
+        }
+      }
+
       // Add file usages back in one by one, so we end up with the correct count
       // for duplicates.
       foreach ($files as $file) {
@@ -319,10 +337,7 @@ public function scanForInstancesOfThisType($data, EntityInterface $entity) {
       }
     }
 
-    // Register file usages with core 'file.usage'.
-    if (!empty($files)) {
-      $this->registerCoreFileUsage($files, $entity);
-    }
+    $this->registerCoreFileUsage($files, $entity);
 
     return $entities;
   }