Module: IpaTestKit::FHIRResourceNavigation

Included in:
MustSupportTest, ProvenanceValidator, ReferenceResolutionTest, SearchTest
Defined in:
lib/ipa_test_kit/fhir_resource_navigation.rb

Constant Summary collapse

DAR_EXTENSION_URL = 
'http://hl7.org/fhir/StructureDefinition/data-absent-reason'.freeze

Instance Method Summary collapse

Instance Method Details

#find_a_value_at(element, path, include_dar: false) ⇒ Object 



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# File 'lib/ipa_test_kit/fhir_resource_navigation.rb', line 20

def find_a_value_at(element, path, include_dar: false)
  return nil if element.nil?

  elements = Array.wrap(element)

  if path.empty?
    unless include_dar
      elements = elements.reject do |el|
        el.respond_to?(:extension) && el.extension.any? { |ext| ext.url == DAR_EXTENSION_URL}
      end
    end

    return elements.find { |el| yield(el) } if block_given?

    return elements.first
  end

  path_segments = path.split('.')
  segment = path_segments.shift.delete_suffix('[x]').to_sym

  no_elements_present =
    elements.none? do |element|
    child = get_next_value(element, segment)

    child.present? || child == false
  end

  return nil if no_elements_present

  remaining_path = path_segments.join('.')

  elements.each do |element|
    child = get_next_value(element, segment)
    element_found =
      if block_given?
        find_a_value_at(child, remaining_path, include_dar: include_dar) { |value_found| yield(value_found) }
      else
        find_a_value_at(child, remaining_path, include_dar: include_dar)
      end

    return element_found if element_found.present? || element_found == false
  end

  nil
end

#get_next_value(element, property) ⇒ Object 



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# File 'lib/ipa_test_kit/fhir_resource_navigation.rb', line 66

def get_next_value(element, property)
  element.send(property)
rescue NoMethodError
  nil
end

#resolve_path(elements, path) ⇒ Object 



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# File 'lib/ipa_test_kit/fhir_resource_navigation.rb', line 5

def resolve_path(elements, path)
  elements = Array.wrap(elements)
  return elements if path.blank?

  paths = path.split('.')
  segment = paths.first
  segment.delete_suffix! '[x]'
  remaining_path = paths.drop(1).join('.')

  elements.flat_map do |element|
    child = get_next_value(element, segment)
    resolve_path(child, remaining_path)
  end.compact
end