1 files changed, 50 insertions, 0 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/api/admin.py b/packages/meshbay-hub/src/meshbay_hub/api/admin.py
index 7ee05ca..4141c79 100644
--- a/packages/meshbay-hub/src/meshbay_hub/api/admin.py
+++ b/packages/meshbay-hub/src/meshbay_hub/api/admin.py
@@ -18,6 +18,7 @@ from meshbay_hub.api.deps import require_admin, require_moderator
 from meshbay_hub.api.revocation import get_connected_node_count, is_node_connected
 from meshbay_hub.db.engine import get_db
 from meshbay_hub.db.models import Group, GroupMember, IPLog, Node, User
+from meshbay_hub import hub_settings
 
 log = logging.getLogger(__name__)
 
@@ -35,6 +36,55 @@ class GroupPatchRequest(BaseModel):
     status: str | None = None
 
 
+class SettingsPatchRequest(BaseModel):
+    allow_public_groups: bool | None = None
+
+
+# ── Instance settings ────────────────────────────────────────────────────────
+
+def _settings_payload(allow_public_groups: bool) -> dict:
+    return {"allow_public_groups": allow_public_groups}
+
+
+@router.get("/settings")
+async def admin_get_settings(
+    current_user: User = Depends(require_moderator),
+    db: AsyncSession = Depends(get_db),
+):
+    """Instance-wide policy an admin controls from the panel. Moderators may read."""
+    return _settings_payload(await hub_settings.public_groups_allowed(db))
+
+
+@router.patch("/settings")
+async def admin_patch_settings(
+    body: SettingsPatchRequest,
+    current_user: User = Depends(require_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    Change instance policy. Admin only — moderators get the read above.
+
+    The enforcement lives where the thing being restricted happens (public-group
+    creation is refused in `groups.create_group`), so flipping this here is the
+    whole change: a client that keeps drawing the option still cannot use it.
+    """
+    if body.allow_public_groups is not None:
+        await hub_settings.set_raw(
+            db, hub_settings.ALLOW_PUBLIC_GROUPS,
+            "true" if body.allow_public_groups else "false")
+        log.info("Instance setting allow_public_groups=%s by %s",
+                 body.allow_public_groups, current_user.username)
+        db.add(IPLog(
+            user_id=current_user.id,
+            event="admin_settings_update",
+            ip_address="admin",
+            detail=f"allow_public_groups={body.allow_public_groups}",
+        ))
+        await db.commit()
+
+    return _settings_payload(await hub_settings.public_groups_allowed(db))
+
+
 # ── Stats ────────────────────────────────────────────────────────────────────
 
 @router.get("/stats")