feat: add firestore bundles

google/cloud/firestore_bundle/__init__.py

@@ -21,11 +21,14 @@
 from .types.bundle import BundledQuery
 from .types.bundle import NamedQuery
 
+from .bundle import FirestoreBundle
+
 
 __all__ = (
     "BundleElement",
     "BundleMetadata",
     "BundledDocumentMetadata",
     "NamedQuery",
     "BundledQuery",
+    "FirestoreBundle",
 )

google/cloud/firestore_bundle/_helpers.py

@@ -0,0 +1,13 @@
+from google.cloud.firestore_v1.base_query import BaseQuery
+from google.cloud.firestore_bundle.types import BundledQuery
+
+
+def limit_type_of_query(query: BaseQuery) -> int:
+    """BundledQuery.LimitType equivalent of this query.
+    """
+
+    return (
+        BundledQuery.LimitType.LAST
+        if query._limit_to_last
+        else BundledQuery.LimitType.FIRST
+    )