Class: FHIR::Generator::MetadataGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/fhir_models/generator/metadata_generator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ig_resources, output_folder) ⇒ MetadataGenerator

Returns a new instance of MetadataGenerator.



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# File 'lib/fhir_models/generator/metadata_generator.rb', line 8

def initialize(ig_resources, output_folder)
  self.ig_resources = ig_resources
  self.output_folder = output_folder
end

Instance Attribute Details

#ig_resources ⇒ Object

Returns the value of attribute ig_resources.



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# File 'lib/fhir_models/generator/metadata_generator.rb', line 6

def ig_resources
  @ig_resources
end

#output_folder ⇒ Object

Returns the value of attribute output_folder.



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# File 'lib/fhir_models/generator/metadata_generator.rb', line 6

def output_folder
  @output_folder
end

Instance Method Details

#generate ⇒ Object 



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# File 'lib/fhir_models/generator/metadata_generator.rb', line 13

def generate
  template = Template.new([], true)
  template.fhir_version = ig_resources.ig_metadata.shortName

  primitives = ig_resources.primitive_types
  hash = {}
  primitives.each do |p|
    field = FHIR::Field.new
    field.name = nil

    # try to find the element that describes the value
    type = p['snapshot']['element'].select { |e| e['path'].end_with?('.value') }.first['type'].first

    # try to find the JSON data type
    field.type = type['code'].gsub('http://hl7.org/fhirpath/System.', '').downcase

    # try to find a regex
    if type['extension']
      ext = type['extension'].find { |e| e['url'] == 'http://hl7.org/fhir/StructureDefinition/regex' }
      field.regex = ext['valueString'] if ext
    end

    hash[p['id']] = field.serialize
  end

  template.constants['PRIMITIVES'] = hash

  template.constants['TYPES'] = ig_resources.complex_types.map { |t| t['id'] }

  # resources
  template.constants['RESOURCES'] = ig_resources.resource_definitions.map { |r| r['id'] }

  output_file_name = File.join(output_folder, "#{output_folder.split('/')[-2]}.rb")
  file = File.open(output_file_name, 'w:UTF-8')
  file.write(template.to_s)
  file.close
end