Merge pull request 'Discord: per-bot OAuth "Connect a Discord server" backend (#225 S6)' (#260) from feat/225-s6-oauth-link into main

drb-c2-core/app/internal/discord_streams.py

@@ -94,6 +94,17 @@ def _parse_ts(value) -> Optional[datetime]:
 # Guild -> org
 # ---------------------------------------------------------------------------
 
+def acting_org_of(link: Optional[dict]) -> Optional[str]:
+    """``resolve_guild_org`` for an already-read ``discord_guilds`` doc (None =
+    no doc). Pure, so a link transaction can decide from the snapshot it read
+    (discord_guild_link.link_guild_txn, server-26#225 S6)."""
+    if link and link.get("org_id"):
+        return link["org_id"]
+    if link and link.get("unlinked_at"):
+        return None
+    return settings.discord_unlinked_guild_org_id or None
+
+
 async def resolve_guild_org(guild_id: str) -> Optional[str]:
     """The org a Discord server acts for: its ``discord_guilds`` link, else
     ``settings.discord_unlinked_guild_org_id`` (None when that is empty).
@@ -101,12 +112,7 @@ async def resolve_guild_org(guild_id: str) -> Optional[str]:
     A server an org explicitly unlinked (``unlinked_at`` set, server-26#213)
     gets no fallback: otherwise unlinking org B's server would quietly hand it
     to the founding org."""
-    link = await fstore.doc_get(GUILDS, str(guild_id))
-    if link and link.get("org_id"):
-        return link["org_id"]
-    if link and link.get("unlinked_at"):
-        return None
-    return settings.discord_unlinked_guild_org_id or None
+    return acting_org_of(await fstore.doc_get(GUILDS, str(guild_id)))
 
 
 async def _node_stream_counts(exclude_stream_id: Optional[str] = None) -> dict[str, int]: