Class: Jekyll::Polyglot::Liquid::I18nHeadersTag

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/jekyll/polyglot/liquid/tags/i18n_headers.rb

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, text, tokens) ⇒ I18nHeadersTag

Returns a new instance of I18nHeadersTag.



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# File 'lib/jekyll/polyglot/liquid/tags/i18n_headers.rb', line 5

def initialize(tag_name, text, tokens)
  super
  @url = text
  @url.strip!
  @url.chomp! '/'
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/jekyll/polyglot/liquid/tags/i18n_headers.rb', line 12

def render(context)
  site = context.registers[:site]
  page = context.registers[:page]
  permalink = page['permalink'] || page['url'] || ''
  permalink = "/#{permalink}" unless permalink.start_with?("/")
  page_id = page['page_id']
  permalink_lang = page['permalink_lang']
  baseurl = site.config['baseurl'] || ''
  site_url = @url.empty? ? site.config['url'] + baseurl : @url
  i18n = "<meta http-equiv=\"Content-Language\" content=\"#{site.active_lang}\">\n"

  # Find all documents with the same page_id
  docs_with_same_id = site.collections.values
    .flat_map(&:docs)
    .filter { |doc| !doc.data['page_id'].nil? }
    .select { |doc| doc.data['page_id'] == page_id }

  # Build a hash of lang => permalink for all matching docs
  lang_to_permalink = docs_with_same_id.to_h { |doc| [doc.data['lang'], doc.data['permalink']] }

  # Canonical should always point to the current page's permalink (active_lang)
  current_lang = site.active_lang
  current_permalink = lang_to_permalink[current_lang] || (permalink_lang && permalink_lang[current_lang]) || permalink
  current_permalink = "/#{current_permalink}" unless current_permalink.start_with?("/")
  # Don't add language prefix if it's already in the permalink
  canonical_permalink = if current_lang == site.default_lang
    current_permalink
  else
    current_permalink.start_with?("/#{current_lang}/") ? current_permalink : "/#{current_lang}#{current_permalink}"
  end
  i18n += "<link rel=\"canonical\" href=\"#{site_url}#{canonical_permalink}\"/>\n"

  # Get the default language permalink for x-default
  default_lang_permalink = lang_to_permalink[site.default_lang] || (permalink_lang && permalink_lang[site.default_lang]) || permalink
  default_lang_permalink = "/#{default_lang_permalink}" unless default_lang_permalink.start_with?("/")

  site.languages.each do |lang|
    alt_permalink = lang_to_permalink[lang] || (permalink_lang && permalink_lang[lang]) || permalink
    alt_permalink = "/#{alt_permalink}" unless alt_permalink.start_with?("/")
    i18n += if lang == site.default_lang
      "<link rel=\"alternate\" hreflang=\"#{lang}\" href=\"#{site_url}#{alt_permalink}\"/>\n" \
        "<link rel=\"alternate\" hreflang=\"x-default\" href=\"#{site_url}#{default_lang_permalink}\"/>\n"
    else
      # For non-default languages, use the language-specific permalink directly
      # Don't add the language prefix if it's already in the permalink
      lang_permalink = alt_permalink.start_with?("/#{lang}/") ? alt_permalink : "/#{lang}#{alt_permalink}"
      "<link rel=\"alternate\" hreflang=\"#{lang}\" href=\"#{site_url}#{lang_permalink}\"/>\n"
    end
  end
  i18n
end