create table if not exists form_transitions (
    id uuid not null primary key default uuidv7(),
    source_id uuid not null references portals(id) on delete cascade,
    dest_id uuid not null references portals(id) on delete restrict,
    condition jsonb not null default 'null'
);
create index on form_transitions (source_id);

create table if not exists field_form_prompts (
    id uuid not null primary key default uuidv7(),
    field_id uuid not null references fields(id) on delete cascade,
    language text not null,
    content text not null default '',
    unique (field_id, language)
);
create index on field_form_prompts (field_id);

create table if not exists form_sessions (
    id uuid not null primary key default uuidv7(),
    user_id uuid references users(id) on delete cascade
);

create table if not exists form_touch_points (
    id uuid not null primary key default uuidv7(),
    -- `on delete restrict` errs on the side of conservatism, but is not known
    -- to be crucial.
    form_session_id uuid not null references form_sessions(id) on delete restrict,
    -- `on delete restrict` errs on the side of conservatism, but is not known
    -- to be crucial.
    portal_id uuid not null references portals(id) on delete restrict,
    -- Points to a row in the portal's backing table, so foreign key constraints
    -- do not apply here.
    row_id uuid not null
);