Class: Pubid::Iec::UrnParser

Inherits:
Object
  • Object
show all
Defined in:
lib/pubid/iec/urn_parser.rb

Overview

Parses RFC 5141-bis compliant URNs into IEC identifiers

URN format: urn:iec:std:publisher:type:number:year:supplements

Examples:

  • urn:iec:std:iec:60050:2011

  • urn:iec:std:iec:tr:60050:2011

  • urn:iec:std:iec:60050-100:2011

  • urn:iec:std:iec:60050:2011:amd:1:2020

Constant Summary collapse

TYPED_STAGE_REVERSE_MAP =

Reverse mappings from URN format to PubID components

{
  "WD" => :wd,
  "WDS" => :wds,
  "CD" => :cd,
  "CDV" => :cdv,
  "DIS" => :dis,
  "FDIS" => :fdis,
  "PDAM" => :pdam,
  "DAM" => :dam,
  "FDAM" => :fdamd,
  "DCOR" => :dcor,
  "FDCOR" => :fdcor,
  "CDTS" => :cdts,
  "DTS" => :dts,
  "FDTS" => :fdts,
  "PRF" => :prf,
  "PWI" => :pwi,
  "NP" => :np,
  "AWI" => :awi,
  "NWIP" => :nwip,
}.freeze
SUPPLEMENT_TYPE_MAP = 
{
  "amd" => :amd,
  "cor" => :cor,
}.freeze
TYPE_CODE_REVERSE_MAP = 
{
  "tr" => :tr,
  "ts" => :ts,
  "pas" => :pas,
  "guide" => :guide,
  "isp" => :isp,
  "r" => :r,
  "sr" => :sr,
  "tap" => :tap,
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse(urn) ⇒ Identifier

Parse IEC URN string

Parameters:

  • urn (String) —

    URN string to parse

Returns:



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# File 'lib/pubid/iec/urn_parser.rb', line 57

def self.parse(urn)
  new.parse_urn(urn)
end

Instance Method Details

#parse_urn(urn) ⇒ Identifier

Parse URN string into identifier

Parameters:

  • urn (String) —

    URN string

Returns:



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# File 'lib/pubid/iec/urn_parser.rb', line 64

def parse_urn(urn)
  # Remove urn:iec:std: prefix
  unless urn.start_with?("urn:iec:std:")
    raise Errors::ParseError,
          "Invalid IEC URN: #{urn}"
  end

  parts = urn.sub("urn:iec:std:", "").split(":")

  # Parse publisher(s) - first part
  publishers = parse_publisher(parts.shift)

  # Parse type - optional (defaults to IS)
  type_code = nil
  type_code = parse_type(parts.first) if parts.first && TYPE_CODE_REVERSE_MAP.key?(parts.first.downcase)
  parts.shift if type_code

  # Parse number
  number_part = parts.shift
  number, part, subpart = parse_number_part(number_part)

  # Check for stage (stage-XX.XX or typed stage like WD, CD, etc.)
  stage_code = nil
  stage_iteration = nil
  if parts.first&.start_with?("stage-")
    stage_code, stage_iteration = parse_stage_code(parts.shift)
  elsif TYPED_STAGE_REVERSE_MAP.key?(parts.first&.upcase)
    stage_abbr = parts.shift.upcase
    stage_code = TYPED_STAGE_REVERSE_MAP[stage_abbr]
    # Check for iteration (WD.2 format)
    if stage_abbr.include?(".")
      stage_code, stage_iteration = stage_abbr.split(".")
      stage_code = TYPED_STAGE_REVERSE_MAP[stage_code]
      stage_iteration = stage_iteration.to_i
    end
  end

  # Parse date if present (year or year-month)
  date = nil
  if parts.first&.match(/^\d{4}(-\d{2})?$/)
    date = parts.shift
  end

  # Parse edition if present (ed.N format)
  edition = nil
  if parts.first&.start_with?("ed.")
    edition = parts.shift.sub("ed.", "").to_i
  end

  # Check for supplements (amd, cor)
  supplements = []
  while parts.any?
    supp_type = nil
    supp_number = nil
    supp_date = nil
    supp_stage = nil

    # Check for supplement stage
    if parts.first&.start_with?("stage-")
      supp_stage_data = parts.shift
      supp_stage, = parse_stage_code(supp_stage_data)
    elsif TYPED_STAGE_REVERSE_MAP.key?(parts.first&.upcase)
      supp_stage_abbr = parts.shift.upcase
      supp_stage = TYPED_STAGE_REVERSE_MAP[supp_stage_abbr]
    end

    # Check for supplement type (amd, cor)
    if SUPPLEMENT_TYPE_MAP.key?(parts.first&.downcase)
      supp_type = SUPPLEMENT_TYPE_MAP[parts.shift.downcase]
    end

    # Check for version (v1, v2, etc.) or number
    if parts.first&.start_with?("v")
      version_str = parts.shift
      supp_number = version_str.sub("v", "").to_i
    elsif parts.first&.match(/^\d+$/)
      # Could be year or supplement number
      if parts.first&.match(/^\d{4}$/)
        # 4 digits = year
        supp_date = parts.shift
      else
        # 1-3 digits = supplement number
        supp_number = parts.shift.to_i
      end
    end

    # Next part might be year if not already set
    if supp_date.nil? && parts.first&.match(/^\d{4}(-\d{2})?$/)
      supp_date = parts.shift
    end

    # Safety: consume unrecognized token to prevent infinite loop
    unless supp_type || supp_number || supp_date || supp_stage
      parts.shift
    end

    supplements << {
      type: supp_type,
      number: supp_number,
      date: supp_date,
      stage: supp_stage,
    }
  end

  # Build the identifier hash
  build_identifier(publishers, number, part, subpart, type_code, stage_code, stage_iteration,
                   date, edition, supplements)
end