-- Up Migration
CREATE TABLE users (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  username TEXT NOT NULL,
  password_hash TEXT NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE UNIQUE INDEX users_username_lower_idx ON users (lower(username));

-- NULL owner = legacy story from before accounts existed: readable if
-- published, but editable by nobody.
ALTER TABLE stories ADD COLUMN owner_id UUID REFERENCES users(id) ON DELETE CASCADE;
CREATE INDEX stories_owner_idx ON stories (owner_id, updated_at DESC);

CREATE TABLE sessions (
  sid TEXT PRIMARY KEY,
  sess JSONB NOT NULL,
  expire TIMESTAMPTZ NOT NULL
);
CREATE INDEX sessions_expire_idx ON sessions (expire);

-- Down Migration
DROP TABLE sessions;
DROP INDEX stories_owner_idx;
ALTER TABLE stories DROP COLUMN owner_id;
DROP TABLE users;