chatwoot/app/controllers/public/api/v1/portals/base_controller.rb

class Public::Api::V1::Portals::BaseController < PublicController
  before_action :show_plain_layout
  before_action :set_color_scheme
  around_action :set_locale
  after_action :allow_iframe_requests

  private

  def show_plain_layout
    @is_plain_layout_enabled = params[:show_plain_layout] == 'true'
  end

  def set_color_scheme
    @theme = if %w[dark light].include?(params[:theme])
               params[:theme]
             else
               'system'
             end
  end

  def portal
    @portal ||= Portal.find_by!(slug: params[:slug], archived: false)
  end

  def set_locale(&)
    switch_locale_with_portal(&) if params[:locale].present?
    switch_locale_with_article(&) if params[:article_slug].present?

    yield
  end

  def switch_locale_with_portal(&)
    locale_without_variant = params[:locale].split('_')[0]
    is_locale_available = I18n.available_locales.map(&:to_s).include?(params[:locale])
    is_locale_variant_available = I18n.available_locales.map(&:to_s).include?(locale_without_variant)
    if is_locale_available
      @locale = params[:locale]
    elsif is_locale_variant_available
      @locale = locale_without_variant
    end

    I18n.with_locale(@locale, &)
  end

  def switch_locale_with_article(&)
    article = Article.find_by(slug: params[:article_slug])
    Rails.logger.info "Article: not found for slug: #{params[:article_slug]}"
    render_404 && return if article.blank?

    @locale = if article.category.present?
                article.category.locale
              else
                'en'
              end

    I18n.with_locale(@locale, &)
  end

  def allow_iframe_requests
    response.headers.delete('X-Frame-Options') if @is_plain_layout_enabled
  end

  def render_404
    portal
    render 'public/api/v1/portals/error/404', status: :not_found
  end
end