Merge remote-tracking branch 'upstream/main' into merge-gramsrv-9106877

deploy/migrations/20260714003110_collectible_usernames.down.sql

@@ -0,0 +1,45 @@
+-- Restore the single-username-per-peer invariant. Collectible registry rows are
+-- dropped first so the old unique index can be recreated; the assets and their
+-- provenance log are then removed with the tables.
+
+DELETE FROM public.peer_usernames WHERE collectible_id IS NOT NULL OR NOT editable;
+
+DROP INDEX IF EXISTS public.peer_usernames_collectible_idx;
+DROP INDEX IF EXISTS public.peer_usernames_peer_order_idx;
+DROP INDEX IF EXISTS public.peer_usernames_peer_editable_idx;
+
+ALTER TABLE public.peer_usernames
+    DROP CONSTRAINT IF EXISTS peer_usernames_sort_order_check,
+    DROP CONSTRAINT IF EXISTS peer_usernames_collectible_not_editable_check,
+    DROP CONSTRAINT IF EXISTS peer_usernames_username_case_check;
+
+ALTER TABLE public.peer_usernames
+    DROP COLUMN IF EXISTS collectible_id,
+    DROP COLUMN IF EXISTS sort_order,
+    DROP COLUMN IF EXISTS editable,
+    DROP COLUMN IF EXISTS active,
+    DROP COLUMN IF EXISTS username;
+
+CREATE UNIQUE INDEX IF NOT EXISTS peer_usernames_peer_unique_idx
+    ON public.peer_usernames (peer_type, peer_id);
+
+CREATE OR REPLACE FUNCTION public.delete_user_peer_username() RETURNS trigger
+    LANGUAGE plpgsql
+    AS $$
+BEGIN
+    DELETE FROM public.peer_usernames WHERE peer_type = 'user' AND peer_id = OLD.id;
+    RETURN OLD;
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION public.delete_channel_peer_username() RETURNS trigger
+    LANGUAGE plpgsql
+    AS $$
+BEGIN
+    DELETE FROM public.peer_usernames WHERE peer_type = 'channel' AND peer_id = OLD.id;
+    RETURN OLD;
+END;
+$$;
+
+DROP TABLE IF EXISTS public.collectible_username_transfers;
+DROP TABLE IF EXISTS public.collectible_usernames;