Class: Pubid::Easc::UrnParser

Inherits:
UrnParser::Base show all
Defined in:
lib/pubid/easc/urn_parser.rb

Overview

Parses EASC URNs back into identifiers.

UrnGenerator emits:

urn:easc:<series>[:<variant>]:<number>[:<year>]

Examples:

urn:easc:pmg:3:2025           → ПМГ 3-2025
urn:easc:pmg:v:31:2001        → ПМГ В 31-2001
urn:easc:rmg:151:2025         → РМГ 151-2025

Constant Summary collapse

PREFIX = 
"urn:easc:".freeze
VARIANT_SEGMENT = 
/\Av\z/i.freeze

Instance Method Summary collapse

Methods inherited from UrnParser::Base

parse

Instance Method Details

#parse_urn(urn) ⇒ Object 



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# File 'lib/pubid/easc/urn_parser.rb', line 18

def parse_urn(urn)
  body = strip_namespace(urn)
  parts = split_parts(body)
  series = parts.fetch(0)
  rest = parts.drop(1)

  variant = nil
  if rest.first&.match?(VARIANT_SEGMENT)
    variant = "V"
    rest = rest.drop(1)
  end
  number = rest[0]
  year = rest[1]

  klass = Easc.identifier_klass_for_series(series) || Identifier
  klass.new(series: series.upcase, variant: variant,
            number: number, year: year)
end