app/lib/user_settings_decorator.rb


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# frozen_string_literal: true

class UserSettingsDecorator
  attr_reader :user, :settings

  def initialize(user)
    @user = user
  end

  def update(settings)
    @settings = settings
    process_update
  end

  private

  def process_update
    user.settings['notification_emails'] = merged_notification_emails if change?('notification_emails')
    user.settings['interactions']        = merged_interactions if change?('interactions')
    user.settings['default_privacy']     = default_privacy_preference if change?('setting_default_privacy')
    user.settings['default_sensitive']   = default_sensitive_preference if change?('setting_default_sensitive')
    user.settings['unfollow_modal']      = unfollow_modal_preference if change?('setting_unfollow_modal')
    user.settings['boost_modal']         = boost_modal_preference if change?('setting_boost_modal')
    user.settings['delete_modal']        = delete_modal_preference if change?('setting_delete_modal')
    user.settings['auto_play_gif']       = auto_play_gif_preference if change?('setting_auto_play_gif')
    user.settings['reduce_motion']       = reduce_motion_preference if change?('setting_reduce_motion')
    user.settings['system_font_ui']      = system_font_ui_preference if change?('setting_system_font_ui')
    user.settings['noindex']             = noindex_preference if change?('setting_noindex')
    user.settings['theme']               = theme_preference if change?('setting_theme')
  end

  def merged_notification_emails
    user.settings['notification_emails'].merge coerced_settings('notification_emails').to_h
  end

  def merged_interactions
    user.settings['interactions'].merge coerced_settings('interactions').to_h
  end

  def default_privacy_preference
    settings['setting_default_privacy']
  end

  def default_sensitive_preference
    boolean_cast_setting 'setting_default_sensitive'
  end

  def unfollow_modal_preference
    boolean_cast_setting 'setting_unfollow_modal'
  end

  def boost_modal_preference
    boolean_cast_setting 'setting_boost_modal'
  end

  def delete_modal_preference
    boolean_cast_setting 'setting_delete_modal'
  end

  def system_font_ui_preference
    boolean_cast_setting 'setting_system_font_ui'
  end

  def auto_play_gif_preference
    boolean_cast_setting 'setting_auto_play_gif'
  end

  def reduce_motion_preference
    boolean_cast_setting 'setting_reduce_motion'
  end

  def noindex_preference
    boolean_cast_setting 'setting_noindex'
  end

  def theme_preference
    settings['setting_theme']
  end
  
  def boolean_cast_setting(key)
    settings[key] == '1'
  end

  def coerced_settings(key)
    coerce_values settings.fetch(key, {})
  end

  def coerce_values(params_hash)
    params_hash.transform_values { |x| x == '1' }
  end

  def change?(key)
    !settings[key].nil?
  end
end