Class: PennMARC::HeadingControl

Inherits:
Object
  • Object
show all
Defined in:
lib/pennmarc/heading_control.rb

Overview

Shared tools and values for controlling handling of subject or genre headings

Constant Summary collapse

ALLOWED_SOURCE_CODES =

These codes are expected to be found in sf2 of a subject/genre field when the indicator2 value is 7, indicating “source specified”. There are some sources whose headings we don’t want to display.

%w[aat cct fast ftamc gmgpc gsafd homoit jlabsh lcgft lcsh lcstt lctgm
local/osu mesh ndlsh nli nlksh rbbin rbgenr rbmscv rbpap rbpri rbprov rbpub rbtyp].freeze
REMOVE_TERM_REGEX = 
/#{Mappers.headings_to_remove&.join('|')}/i
REPLACE_TERM_REGEX = 
/(#{Mappers.heading_overrides.keys.join('|')})/i

Class Method Summary collapse

Class Method Details

.term_override(values) ⇒ Array

Replace or remove any terms in provided values pursuant to the configuration in remove and override mappers. Used to remove or replace offensive or otherwise undesirable subject headings.



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# File 'lib/pennmarc/heading_control.rb', line 19

def term_override(values)
  values.filter_map do |value|
    # Remove values if they contain a remove term
    next nil if value.match?(REMOVE_TERM_REGEX)

    # return early if theres no terms to replace
    next value if value.match(REPLACE_TERM_REGEX).nil?

    # lookup and perform replacement
    value.sub(::Regexp.last_match.to_s, Mappers.heading_overrides[::Regexp.last_match.to_s.downcase])
  end
end