feat: [AXM-343] Transfer offline download solution for HTML xblock

openedx/features/offline_mode/assets_management.py

@@ -48,22 +48,20 @@ def save_asset_file(temp_dir, xblock, path, filename):
         path (str): The path where the asset is located.
         filename (str): The name of the file to be saved.
     """
-    if filename.endswith('djangojs.js'):
-        return
-
     try:
-        if '/' in filename:
+        if filename.startswith('assets/'):
+            asset_filename = filename.split('/')[-1]
+            asset_key = StaticContent.get_asset_key_from_path(xblock.location.course_key, asset_filename)
+            content = AssetManager.find(asset_key).data
+            file_path = os.path.join(temp_dir, filename)
+        else:
             static_path = get_static_file_path(filename)
             content = read_static_file(static_path)
-        else:
-            asset_key = StaticContent.get_asset_key_from_path(xblock.location.course_key, path)
-            content = AssetManager.find(asset_key).data
+            file_path = os.path.join(temp_dir, 'assets', filename)
     except (ItemNotFoundError, NotFoundError):
         log.info(f"Asset not found: {filename}")
 
     else:
-        assets_path = os.path.join(temp_dir, 'assets')
-        file_path = os.path.join(assets_path, filename)
         create_subdirectories_for_asset(file_path)
         with open(file_path, 'wb') as file:
             file.write(content)

openedx/features/offline_mode/html_manipulator.py

@@ -30,6 +30,7 @@ def process_html(self):
 
         Changes links to static files to paths to pre-generated static files for offline use.
         """
+        self._replace_asset_links()
         self._replace_static_links()
         self._replace_mathjax_link()
 
@@ -53,6 +54,22 @@ def _replace_static_links(self):
         pattern = re.compile(fr'{static_links_pattern}')
         self.html_data = pattern.sub(self._replace_link, self.html_data)
 
+    def _replace_asset_links(self):
+        """
+        Replace static links with local links.
+        """
+        pattern = re.compile(r'/assets/[\w./@:+-]+')
+        self.html_data = pattern.sub(self._replace_asset_link, self.html_data)
+
+    def _replace_asset_link(self, match):
+        """
+        Returns the local path of the asset file.
+        """
+        link = match.group()
+        filename = link[1:] if link.startswith('/') else link  # Remove the leading '/'
+        save_asset_file(self.temp_dir, self.xblock, link, filename)
+        return filename
+
     def _replace_link(self, match):
         """
         Returns the local path of the asset file.