Module: Metanorma::Mirror::Metadata

Defined in:
lib/metanorma/mirror/metadata.rb

Overview

Extracts metadata (title, etc.) from a parsed Metanorma document's bibdata. This is a standalone service that the pipeline and other consumers can use without depending on the Handlers layer.

Class Method Summary collapse

Class Method Details

.title_from_bibdata(bibdata) ⇒ Object

Returns the first title string from a bibdata object, or nil. The bibdata must respond to title and return a String, an Array of Strings, or an Array of Lutaml::Model::Serializables with content.



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# File 'lib/metanorma/mirror/metadata.rb', line 13

def self.title_from_bibdata(bibdata)
  return nil unless bibdata

  title = bibdata.title
  return nil unless title

  case title
  when String then title
  when Array
    first = title.first
    return nil unless first

    if first.is_a?(String)
      first
    elsif first.is_a?(Lutaml::Model::Serializable)
      Array(first.content).join
    else
      first.to_s
    end
  else title.to_s
  end
end