class AddAnalyticsToPlayers < ActiveRecord::Migration[8.1]
  def change
    # Furthest screen the player reached, so drop-off can be measured for
    # people who quit before ever answering anything (progress stays empty).
    add_column :players, :furthest_step, :string

    # Thumbs up (1) / thumbs down (-1) from the results screen. One per player.
    add_column :players, :rating, :integer
    add_column :players, :rated_at, :datetime

    add_index :players, :furthest_step
    add_index :players, :rating
    add_index :players, :created_at
  end
end