Class: Cocina::Models::Builders::NameTitleGroupBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/cocina/models/builders/name_title_group_builder.rb

Overview

Helpers for MODS nameTitleGroups.

MODS titles need to know if they match a contributor and thus need a nameTitleGroup
MODS contributors need to know if they match a title and thus need a nameTitleGroup
  If there is a match, the nameTitleGroup number has to be consistent for the matching title(s)
  and the contributor(s)

Class Method Summary collapse

Class Method Details

.build_title_values_to_contributor_name_values(title) ⇒ Hash<Hash, Hash>

When to assign nameTitleGroup to MODS from cocina:

for cocina title of type "uniform",
  look for cocina title properties :value or :structuredValue (recurse down through :parallelValue
  as needed), and look for associated :note with :type of "associated name" at the level of the
  non-empty title [value|structuredValue]
  The note of type "associated name" will have [value|structuredValue] which will match
  [value|structuredValue] for a contributor (possibly after recursing through :parallelValue).
Thus, a title [value|structuredValue] and a contributor [value|structuredValue] are associated in
cocina.

If those criteria not met in Cocina, do not assign nameTitleGroup in MODS

Returns:

  • (Hash<Hash, Hash>) —

    key: hash of value or structuredValue property for title value: hash of value or structuredValue property for contributor e.g. of the artist as a young man”=>Joyce”} e.g. of the artist as a young man”=> 

    [{:value=>"Joyce, James", :type=>"name",:type=>"life dates"]}}

    e.g. {{:structuredValue=>[{:value=>“Demanding Food”, :type=>“main”},

    Cat's Life", :type=>"subtitle"]}=>Joyce"}

    this complexity is needed for multilingual titles mapping to multilingual names.



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 33

def self.build_title_values_to_contributor_name_values(title)
  result = {}
  return result if title.blank?

  # pair title value with contributor name value
  title_value_note_slices(title).each do |value_note_slice|
    title_val_slice = slice_of_value_or_structured_value(value_note_slice)
    next if title_val_slice.blank?

    associated_name_note = value_note_slice[:note]&.detect { |note| note[:type] == 'associated name' }
    next if associated_name_note.blank?

    # relevant note will be Array of either
    #   {
    #     value: 'string contributor name',
    #     type: 'associated name'
    #   }
    # OR
    #   {
    #     structuredValue: [ structuredValue contributor name ],
    #     type: 'associated name'
    #   }
    # and we want the hash without the :type attribute
    result[title_val_slice] = slice_of_value_or_structured_value(associated_name_note)
  end
  result
end

.contributor_for_contributor_name_value_slice(contributor_name_value_slice:, contributors:) ⇒ Object 



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 61

def self.contributor_for_contributor_name_value_slice(contributor_name_value_slice:, contributors:)
  Array(contributors).find do |contributor|
    contrib_name_value_slices = contributor_name_value_slices(contributor)
    contrib_name_value_slices.include?(contributor_name_value_slice)
  end
end

.contributor_name_value_slices(contributor) ⇒ Hash

Returns where we are only interested in hashes containing (either :value or :structureValue).

Returns:

  • (Hash) —

    where we are only interested in hashes containing (either :value or :structureValue)



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 71

def self.contributor_name_value_slices(contributor)
  return if contributor&.name.blank?

  Array(contributor.name).map { |contrib_name| value_slices(contrib_name) }.flatten
end

.slice_of_value_or_structured_value(hash) ⇒ Object

for a given Hash (from a Cocina DescriptiveValue or Title or Name or …) result will be either

{ value: 'string value' }

OR

{ structuredValue: [ some structuredValue ] }



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 97

def self.slice_of_value_or_structured_value(hash)
  if hash[:value].present?
    hash.slice(:value).select { |_k, value| value.present? }
  elsif hash[:structuredValue].present?
    hash.slice(:structuredValue).select { |_k, value| value.present? }
  end
end

.title_value_note_slices(title) ⇒ Array<Cocina::Models::DescriptiveValue>

reduce parallelValues down to value or structuredValue for these slices

Returns:



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 109

def self.title_value_note_slices(title)
  slices = []
  title_slice = title.to_h.slice(:value, :structuredValue, :parallelValue, :note)
  if title_slice[:value].present? || title_slice[:structuredValue].present?
    slices << title_slice.select { |_k, value| value.present? }
  elsif title_slice[:parallelValue].present?
    title_slice[:parallelValue].each do |parallel_val|
      slices << title_value_note_slices(parallel_val)
    end
  end
  # ignoring groupedValue
  slices.flatten
end

.value_slices(desc_value) ⇒ Array<Cocina::Models::DescriptiveValue>

Returns where we are only interested in hashes containing (either :value or :structuredValue).

Returns:



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# File 'lib/cocina/models/builders/name_title_group_builder.rb', line 80

def self.value_slices(desc_value)
  slices = []
  desc_value_slice = desc_value.to_h.slice(:value, :structuredValue, :parallelValue)
  if desc_value_slice[:value].present? || desc_value_slice[:structuredValue].present?
    slices << desc_value_slice.select { |_k, value| value.present? }
  elsif desc_value_slice[:parallelValue].present?
    desc_value_slice[:parallelValue].each { |parallel_val| slices << value_slices(parallel_val) }
  end
  # ignoring groupedValue
  slices.flatten
end