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

class Public::Api::V1::Portals::ArticlesController < Public::Api::V1::Portals::BaseController
  before_action :ensure_custom_domain_request, only: [:show, :index]
  before_action :portal
  before_action :set_category, except: [:index, :show, :tracking_pixel]
  before_action :set_article, only: [:show]
  layout 'portal'

  def index
    @articles = @portal.articles.published.includes(:category, :author)

    @articles = @articles.where(locale: permitted_params[:locale]) if permitted_params[:locale].present?

    @articles_count = @articles.count

    search_articles
    order_by_sort_param
    limit_results
  end

  def show; end

  def tracking_pixel
    @article = @portal.articles.find_by(slug: permitted_params[:article_slug])
    return head :not_found unless @article

    @article.increment_view_count if @article.published?

    # Serve the 1x1 tracking pixel with 24-hour private cache
    # Private cache bypasses CDN but allows browser caching to prevent duplicate views from same user
    expires_in 24.hours, public: false
    response.headers['Content-Type'] = 'image/png'

    pixel_path = Rails.public_path.join('assets/images/tracking-pixel.png')
    send_file pixel_path, type: 'image/png', disposition: 'inline'
  end

  private

  def limit_results
    return if list_params[:per_page].blank?

    per_page = [list_params[:per_page].to_i, 100].min
    per_page = 25 if per_page < 1
    @articles = @articles.page(list_params[:page]).per(per_page)
  end

  def search_articles
    @articles = @articles.search(list_params) if list_params.present?
  end

  def order_by_sort_param
    @articles = if list_params[:sort].present? && list_params[:sort] == 'views'
                  @articles.order_by_views
                else
                  @articles.order_by_position
                end
  end

  def set_article
    @article = @portal.articles.find_by(slug: permitted_params[:article_slug])
    @parsed_content = render_article_content(@article.content)
  end

  def set_category
    return if permitted_params[:category_slug].blank?

    @category = @portal.categories.find_by!(
      slug: permitted_params[:category_slug],
      locale: permitted_params[:locale]
    )
  end

  def list_params
    params.permit(:query, :locale, :sort, :status, :page, :per_page)
  end

  def permitted_params
    params.permit(:slug, :category_slug, :locale, :id, :article_slug)
  end

  def render_article_content(content)
    ChatwootMarkdownRenderer.new(content).render_article
  end
end

Public::Api::V1::Portals::ArticlesController.prepend_mod_with('Public::Api::V1::Portals::ArticlesController')