player.rb

class Player
  def self.all
    REDIS.smembers("player_ids").map do |player_id|
      JSON.parse(REDIS.get("player_#{player_id}"))
    end
  end

  def self.add(player_json)
    player = JSON.parse(player_json)
    raise "Player is blank" if player.blank?

    REDIS.sadd("player_ids", player["id"])
    REDIS.set("player_#{player["id"]}", player_json)
    broadcast
    REDIS.incr("count_players")
  end

  def self.link(player, uuid)
    player_id = JSON.parse(player)["id"]
    raise "Player is blank" if player_id.blank?

    REDIS.set("player_ref_#{uuid}", player_id)
  end

  def self.delete(uuid)
    player_id = id_from_uuid(uuid)

    REDIS.srem("player_ids", player_id)

    broadcast
  end

  def self.delete_all
    puts "DELETE ALL!"

    REDIS.del("players")
    broadcast
  end

  private

  def self.id_from_uuid(uuid)
    REDIS.get("player_ref_#{uuid}")
  end

  def self.broadcast
    ActionCable.server.broadcast(
      "game",
      {
        type: "player_update",
        players: Player.all
      }
    )
  end
end