Added support for creating a file object from file in storage

src/Database/Attach/File.php

@@ -10,6 +10,7 @@
 use Illuminate\Support\Facades\Storage;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\File\File as FileObj;
+use Winter\Storm\Exception\ApplicationException;
 
 /**
  * File attachment model
@@ -141,6 +142,29 @@ public function fromFile($filePath)
         return $this;
     }
 
+    /**
+     * Creates a file object from a file on the disk returned by $this->getDisk()
+     */
+    public function fromStorage(string $filePath): static
+    {
+        $disk = $this->getDisk();
+
+        if (!$disk->exists($filePath)) {
+            throw new \InvalidArgumentException(sprintf('File `%s` was not found on the storage disk', $filePath));
+        }
+
+        $this->file_name = basename($filePath);
+        $this->file_size = $disk->size($filePath);
+        $this->content_type = $disk->mimeType($filePath);
+        $this->disk_name = $this->getDiskName();
+
+        if (!$disk->copy($filePath, $this->getDiskPath())) {
+            throw new ApplicationException(sprintf('Unable to copy `%s` to `%s`', $filePath, $this->getDiskPath()));
+        }
+
+        return $this;
+    }
+
     /**
      * Creates a file object from raw data.
      *
@@ -529,8 +553,10 @@ public function beforeSave()
         if ($this->data !== null) {
             if ($this->data instanceof UploadedFile) {
                 $this->fromPost($this->data);
-            } else {
+            } elseif (file_exists($this->data)) {
                 $this->fromFile($this->data);
+            } else {
+                $this->fromStorage($this->data);
             }
 
             $this->data = null;