snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

zerver/lib/recipient_parsing.py

@@ -0,0 +1,17 @@
+from django.utils.translation import gettext as _
+
+from zerver.lib.exceptions import JsonableError
+
+
+def extract_stream_id(req_to: int | list[int]) -> int:
+    # Recipient should only be a single stream ID.
+    if isinstance(req_to, list):
+        raise JsonableError(_("Invalid data type for channel ID"))
+    return req_to
+
+
+def extract_direct_message_recipient_ids(req_to: int | list[int]) -> list[int]:
+    if not isinstance(req_to, list):
+        raise JsonableError(_("Invalid data type for recipients"))
+
+    return list(set(req_to))