module Gtn::Scholar

# File _plugins/gtn/scholar.rb, line 36
def self.discover_bib
  Jekyll.logger.info '[GTN/scholar] Creating global bib cache'
  global_bib = BibTeX::Bibliography.new
  bib_paths = [Find.find('./topics'), Find.find('./faqs'), Find.find('./news')].lazy.flat_map(&:lazy).grep(/bib$/)
  bib_paths.each do |path|
    BibTeX.open(path).each do |x|
      x = x.convert_latex
      global_bib << x
    end
  end
  Jekyll.logger.info "[GTN/scholar] Done: #{global_bib.length}"
  style = CSL::Style.load('_layouts/g3.csl')
  cp = CiteProc::Processor.new style: style,
                               format: 'html', locale: 'en'
  cp.import global_bib.to_citeproc

  [global_bib, cp]
end

# File _plugins/gtn/scholar.rb, line 10
def self.load_bib(site)
  return if site.config.key?('cached_global_bib')

  (global_bib, cp) = populate_cache
  site.config['cached_global_bib'] = global_bib
  site.config['cached_citeproc'] = cp
end

# File _plugins/gtn/scholar.rb, line 18
def self.populate_cache
  @@cache ||= discover_bib
end

# File _plugins/gtn/scholar.rb, line 22
def self.render_citation(key)
  (global_bib, citeproc) = populate_cache

  text = citeproc.render(:bibliography, id: key)[0]
  entry = global_bib[key]
  text += " #{entry.note}." if entry.note
  doi = entry.fetch('doi', nil)
  text += " <a href=\"https://doi.org/#{doi}\">#{doi}</a>" if doi
  url = entry.fetch('url', nil)
  text += " <a href=\"#{url}\">#{url}</a>" if url && !(url.index('doi.org') && entry.doi)

  text
end