zammad/app/controllers/knowledge_base/public/categories_controller.rb

# Copyright (C) 2012-2023 Zammad Foundation, https://zammad-foundation.org/

class KnowledgeBase::Public::CategoriesController < KnowledgeBase::Public::BaseController
  skip_before_action :load_kb, only: :forward_root

  def index
    @categories     = categories_filter(@knowledge_base.categories.root)
    @object_locales = find_locales(@knowledge_base)

    authorize(@categories, policy_class: Controllers::KnowledgeBase::Public::CategoriesControllerPolicy)
  rescue Pundit::NotAuthorizedError
    raise ActiveRecord::RecordNotFound
  end

  def show
    @object = find_category(params[:category])

    render_alternatives && return if @object.nil? || !policy(@object).show_public?

    @categories     = categories_filter(@object.children)
    @object_locales = find_locales(@object)
    @answers        = answers_filter(@object.answers)

    render :index
  end

  def forward_root
    knowledge_base = policy_scope(KnowledgeBase).first!

    primary_locale = KnowledgeBase::Locale
                     .system_with_kb_locales(knowledge_base)
                     .where(knowledge_base_locales: { primary: true })
                     .first!

    path = help_root_path(locale: primary_locale.locale)

    redirect_to custom_path_if_needed(path, knowledge_base, full: true)
  end

  private

  def render_alternatives
    @page_title_error = :alternatives

    @object = nil

    @alternative = @knowledge_base
                   .categories
                   .eager_load(translations: :kb_locale)
                   .find_by(id: params[:category])

    if @alternative.nil? || @alternative.translations.none? || !policy(@alternative).show?
      raise ActiveRecord::RecordNotFound
    end

    @object_locales = @alternative.translations.map(&:kb_locale).map(&:system_locale)

    render 'knowledge_base/public/show_alternatives', locals: { name: 'Category' }
  end
end