feat: add support for local asset URLs in S3 storage backends

Co-authored-by: Copilot <copilot@github.com>

tienda/storage_backends.py

@@ -1,8 +1,19 @@
 from __future__ import annotations
 
+import os
+
+from django.utils.encoding import iri_to_uri
 from storages.backends.s3 import S3ManifestStaticStorage, S3Storage
 
 
+def _use_local_asset_urls() -> bool:
+    return os.getenv('S3_USE_LOCAL_URLS', '').strip().lower() in {'1', 'true', 'yes', 'on'}
+
+
+def _local_asset_url(prefix: str, name: str) -> str:
+    return iri_to_uri(f'/{prefix}/{name.lstrip("/")}')
+
+
 class StaticStorage(S3ManifestStaticStorage):
     location = 'static'
     default_acl = 'public-read'
@@ -12,6 +23,11 @@ class StaticStorage(S3ManifestStaticStorage):
         'CacheControl': 'public, max-age=31536000, immutable',
     }
 
+    def url(self, name: str) -> str:
+        if _use_local_asset_urls():
+            return _local_asset_url('static', name)
+        return super().url(name)
+
 
 class MediaStorage(S3Storage):
     location = 'media'
@@ -20,4 +36,9 @@ class MediaStorage(S3Storage):
     file_overwrite = False
     object_parameters = {
         'CacheControl': 'public, max-age=604800',
-    }
+    }
+
+    def url(self, name: str) -> str:
+        if _use_local_asset_urls():
+            return _local_asset_url('media', name)
+        return super().url(name)