Class: EpubWorm::Extractors::Metadata

Inherits:
Object
  • Object
show all
Extended by:
Base
Defined in:
lib/epub_worm/extractors/metadata.rb

Constant Summary collapse

SUBJECT_SEPARATOR = 
" -- "

Constants included from Base

Base::DEFAULT_NS

Class Method Summary collapse

Methods included from Base

as_xml, element_at, elements_at, extended, ns, ns_entry, open_opf, text_at

Class Method Details

.extract(path) ⇒ Object 



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# File 'lib/epub_worm/extractors/metadata.rb', line 14

def self.extract(path)
  open_opf(path) do |opf_doc|
    ::EpubWorm::Metadata.new(
      title: text_at(opf_doc, "//dc:title"),
      authors: elements_at(opf_doc, "//dc:creator").map(&:text).map(&:strip).reject(&:empty?),
      language: text_at(opf_doc, "//dc:language"),
      publisher: text_at(opf_doc, "//dc:publisher"),
      description: text_at(opf_doc, "//dc:description"),
      published_at: text_at(opf_doc, "//dc:date") && Date.parse(text_at(opf_doc, "//dc:date")),
      subjects: elements_at(opf_doc, "//dc:subject").reduce([]) do |subjects, subject|
        subjects += subject.text.split(SUBJECT_SEPARATOR).map(&:strip).reject(&:empty?)
        subjects.uniq
      end
    )
  end
end