-- +goose Up
-- Stage 15 dual Telegram bots: service_language records the language tag of the bot
-- a Telegram user last authenticated through (their last ValidateInitData). It is
-- updated on every Telegram login — new and existing accounts — and routes the
-- user's out-of-app push back through the right bot. It is distinct from
-- preferred_language (the interface language) and from a game's variant language.
-- Nullable: an account that has never signed in through a tagged bot (legacy,
-- email-only or guest) has no value, and push routing falls back to
-- preferred_language. Adds a column, so the generated jet code is regenerated
-- (cmd/jetgen).
SET search_path = backend, pg_catalog;

ALTER TABLE accounts
    ADD COLUMN service_language text
        CHECK (service_language IN ('en', 'ru'));

-- +goose Down
SET search_path = backend, pg_catalog;

ALTER TABLE accounts
    DROP COLUMN service_language;