totem_helper.rb

# frozen_string_literal: true

class TotemHelper
  def initialize(params:, model:)
    @params = params
    @model = model
  end

  # Checks avatar presence of
  def avatar_present?
    model.avatar?
  end

  # Checks include totem of avatar
  def include_totem?
    model.avatar.url&.split('/')&.last&.include? 'totem'
  end

  # Gets model name
  def model_name
    params[:controller]&.downcase&.singularize
  end

  # Gets totem public path
  def totem_path
    Dir[ENV["#{model_name}_totem_avatar"]].first
  end

  # Gets sample totem filename
  def sample_totem
    Dir[totem_path + '/*'].sample&.split('/').last
  end

  # Saves avatar as sample totem of company
  def save_avatar_as_sample_totem
    model.avatar = File.open(totem_path + '/' + sample_totem)
    model.save!
  end

  # Saves avatar if not present or updates current totem
  def set_totem_if_needed
    save_avatar_as_sample_totem if !avatar_present? || include_totem?
  end

  protected

  attr_accessor :params, :model
end

users_controller.rb

# frozen_string_literal: true

class UsersController < ApiController
  require 'googleauth'

  def show
    TotemHelper.new(params: params, model: current_user).set_totem_if_needed # Saves avatar if not present or updates current totem

    render json: current_user, serializer: CurrentUserSerializer
  end
  
  def google_auth
    audience = Google::Auth::ClientId.new ENV['google_client_id'], ENV['google_client_secret']
    validator = GoogleIDToken::Validator.new

    begin
      claim = validator.check(user_params['token_id'], audience.id)
      user = User.social_auth(claim)

      render json: user, status: :created, serializer: CurrentUserSerializer
    rescue GoogleIDToken::ValidationError => e
      render json: { message: 'Invalid token id' }, status: :unprocessable_entity
    end
  end
end