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Generating sitemap.xml

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sitemap lib sitemap builders file.ex
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lib/sitemap/builders/file.ex 

defmodule Sitemap.Builders.File do

  alias Sitemap.Consts

  alias Sitemap.Config

  alias Sitemap.Builders.Url

  alias Sitemap.Location

  require XmlBuilder



  use Sitemap.State, [

    link_count: 0,

    news_count: 0,

    content: "",

    content_size: 0,

  ]



  def sizelimit?(content) do

    size = byte_size(content)

    incr_state :content_size, size



    cfg = Config.get

    s = state



    r = (size + s.content_size) < cfg.max_sitemap_filesize

    r = r && s.link_count < cfg.max_sitemap_links

    r = r && s.news_count < cfg.max_sitemap_news

    r

  end



  def add(link, attrs \\ []) do

    content =

      Url.to_xml(link, attrs)

      |> XmlBuilder.generate



    if sizelimit?(content) do

      add_state :content, content

      incr_state :link_count

    else

      :full

    end

  end



  def write do

    s = state

    content = Consts.xml_header <> s.content <> Consts.xml_footer



    Location.reserve_name(:file)

    Location.write :file, content, s.link_count

  end



end