class AdditionalsMacro
  def self.all(options = {})
    all = Redmine::WikiFormatting::Macros.available_macros
    macros = {}
    macro_list = []

    # needs to run every request (for each user once)
    permissions = build_permissions(options)

    if options[:filtered].present?
      options[:filtered] << 'hello_world'
    else
      options[:filtered] = ['hello_world']
    end

    all.each do |macro, macro_options|
      next if options[:filtered].include?(macro.to_s)
      next unless macro_allowed(macro, permissions)

      macro_list << macro.to_s
      macros[macro] = macro_options
    end

    if options[:only_names]
      macro_list.sort
    else
      macros.sort
    end
  end

  def self.macro_allowed(macro, permissions)
    permissions.each do |permission|
      next if permission[:list].exclude?(macro)
      return false unless permission[:access]
    end

    true
  end

  def self.build_permissions(options)
    gpermission = []
    macro_permissions.each do |permission|
      permission[:access] = if options[:controller_only] &&
                               permission[:controller].present? &&
                               options[:controller_only].to_sym != permission[:controller]
                              false
                            else
                              User.current.allowed_to?(permission[:permission], nil, global: true)
                            end
      gpermission << permission
    end

    gpermission
  end

  def self.macro_permissions
    [{ list: %i[issue issue_name_link],
       permission: :view_issues },
     { list: %i[password password_query password_tag password_tag_count],
       permission: :view_passwords },
     { list: %i[contact deal contact_avatar contact_note contact_plain],
       permission: :view_contacts },
     { list: %i[db db_query db_tag db_tag_count],
       permission: :view_db_entries },
     { list: %i[child_pages calendar last_updated_at last_updated_by lastupdated_at lastupdated_by
                new_page recently_updated recent comments comment_form tags taggedpages tagcloud
                show_count count vote show_vote terms_accept terms_reject],
       permission: :view_wiki_pages,
       controller: :wiki },
     { list: %i[mail send_file],
       permission: :view_helpdesk_tickets },
     { list: %i[kb article_id article category],
       permission: :view_kb_articles }]
  end
end