Module: DaVinciPDexTestKit::MockServer

Includes:
URLs
Included in:
PDexPayerClientSuite
Defined in:
lib/davinci_pdex_test_kit/mock_server.rb

Overview

Serve responses to PAS requests

Note that there are numerous expected validation issues that can safely be ignored. See here for full list: hl7.org/fhir/us/davinci-pas/STU2/qa.html#suppressed

Instance Method Summary collapse

Methods included from URLs

#base_fhir_url, #base_url, #binary_url, #everything_url, #export_status_url, #export_url, #member_match_url, #metadata_url, #patient_url, #resume_clinical_data_url, #resume_fail_url, #resume_pass_url, #submit_url, #suite_id, #token_url

Instance Method Details

#absolute_reference(ref, entries, root_url) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 228

def absolute_reference(ref, entries, root_url)
  url = find_matching_entry(ref&.reference, entries, root_url)&.fullUrl
  ref.reference = url if url
  ref
end

#binary_read_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 91

def binary_read_response(request, test = nil, test_result = nil)
  binary_id = request.url.split('/').last
  response = server_proxy.get('Binary/'+binary_id)
  request.status = response.status
  request.response_headers = response.headers
  request.response_body = response.body
end

#claim_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 32

def claim_response(request, test = nil, test_result = nil)
  endpoint = resource_endpoint(request.url)
  params = match_request_to_expectation(endpoint, request.query_parameters)
  if params
    response = server_proxy.get(endpoint, params)
    request.status = response.status
    response_resource = replace_bundle_urls(FHIR.from_contents(response.body))
    request.response_headers = remove_transfer_encoding_header(response.headers)
    request.response_body = response_resource.to_json
    request.response_header("content-length").value = request.response_body.length
  else
    response = server_proxy.get('Patient', {_id: 999})
    response_resource = FHIR.from_contents(response.body)
    response_resource.entry = [{fullUrl: 'urn:uuid:2866af9c-137d-4458-a8a9-eeeec0ce5583', resource: mock_operation_outcome_resource, search: {mode: 'outcome'}}]
    response_resource.link.first.url = request.url #specific case for Operation Outcome handling
    request.status = 400
    request.response_body = response_resource.to_json
  end
end

#everything_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 59

def everything_response(request, test = nil, test_result = nil)
  response = server_proxy.get('Patient/999/$everything') #TODO: Change from static response
  request.status = response.status
  request.response_headers = remove_transfer_encoding_header(response.headers)
  request.response_body = replace_bundle_urls(FHIR.from_contents(response.body)).to_json
end

#export_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 66

def export_response(request, test = nil, test_result = nil)
  headers_as_hash = request.request_headers.map { |header| {"#{header.name}": header.value}}.reduce({}) { |reduced, curr| reduced.merge(curr)}
  response = server_proxy.get do |req|
    req.url 'Group/pdex-Group/$export' #TODO: change from static response
    req.headers = headers_as_hash.merge(server_proxy.headers)
  end
  request.status = response.status
  request.response_headers = response.env.response_headers
  request.response_header("content-location").value.gsub!(/(.*)\?/, "#{new_link}/$export-poll-status?")
  request.response_body = response.body
end

#export_status_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 78

def export_status_response(request, test = nil, test_result = nil)
  headers_as_hash = request.request_headers.map { |header| {"#{header.name}": header.value}}.reduce({}) { |reduced, curr| reduced.merge(curr)}
  response = server_proxy.get do |req|
    req.url '$export-poll-status'
    req.params = request.query_parameters
    req.headers = headers_as_hash.merge(server_proxy.headers)
  end
  request.status = response.status
  request.response_headers = remove_transfer_encoding_header(response.env.response_headers)
  request.response_body = response.status.to_i == 200 ? replace_export_urls(JSON.parse(response.body)).to_json : response.body
  request.response_header("content-length").value = request.response_body.length
end

#extract_bearer_token(request) ⇒ Object

Header expected to be a bearer token of the form “Bearer: <token>”



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 163

def extract_bearer_token(request)
  request.request_header('Authorization')&.value&.split&.last
end

#extract_client_id(request) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 158

def extract_client_id(request)
  URI.decode_www_form(request.request_body).to_h['client_id']
end

#extract_token_from_query_params(request) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 167

def extract_token_from_query_params(request)  
  request.query_parameters['token']
end

#fetch_all_bundled_resources(reply_handler: nil, max_pages: 0, additional_resource_types: [], resource_type: self.resource_type) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 234

def fetch_all_bundled_resources(
      reply_handler: nil,
      max_pages: 0,
      additional_resource_types: [],
      resource_type: self.resource_type
    )
  page_count = 1
  resources = []
  bundle = resource
  resources += bundle&.entry&.map { |entry| entry&.resource }

  until bundle.nil? || (page_count == max_pages && max_pages != 0)
    
    next_bundle_link = bundle&.link&.find { |link| link.relation == 'next' }&.url
    reply_handler&.call(response)

    break if next_bundle_link.blank?

    reply = fhir_client.raw_read_url(next_bundle_link)

    store_request('outgoing') { reply }
    error_message = cant_resolve_next_bundle_message(next_bundle_link)

    assert_response_status(200)
    assert_valid_json(reply.body, error_message)

    bundle = fhir_client.parse_reply(FHIR::Bundle, fhir_client.default_format, reply)
    resources += bundle&.entry&.map { |entry| entry&.resource }

    page_count += 1
  end
  valid_resource_types = [resource_type, 'OperationOutcome'].concat(additional_resource_types)
  resources
end

#find_matching_entry(ref, entries, root_url = '') ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 270

def find_matching_entry(ref, entries, root_url = '')
  ref = "#{root_url}/#{ref}" if relative_reference?(ref) && root_url&.present?

  entries&.find { |entry| entry&.fullUrl == ref }
end

#get_metadata ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 130

def get_metadata
  proc { [200, {'Content-Type' => 'application/fhir+json;charset=utf-8'}, [File.read("lib/davinci_pdex_test_kit/metadata/mock_capability_statement.json")]] }
end

#match_request_to_expectation(endpoint, params) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 142

def match_request_to_expectation(endpoint, params)
  matched_search = SEARCHES_BY_PRIORITY[endpoint.to_sym].find {|expectation| (params.keys.map{|key| key.to_s} & expectation).sort == expectation}
  # matched_search_without_patient = SEARCHES_BY_PRIORITY[endpoint.to_sym].find {|expectation| (params.keys.map{|key| key.to_s} << "patient" & expectation) == expectation}

  if matched_search
    params.select {|key, value| matched_search.include?(key.to_s) || key == "_revInclude" || key == "_include"}
  else
    nil
  end
  # else
  #   new_params = params.select {|key, value| matched_search_without_patient.include?(key.to_s) || key == "_revInclude" || key == "_include"}
  #   new_params["patient"] = patient_id_from_match_request
  #   new_params
  # end
end

#member_match_response(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 99

def member_match_response(request, test = nil, test_result = nil)
  #remove token from request as well
  original_request_as_hash = JSON.parse(request.request_body).to_h
  request.request_body = original_request_as_hash.to_json
  #TODO: Change from static response
  request.response_body = {
    resourceType: "Parameters",
    parameter: [
      {
        name: "MemberIdentifier",
        valueIdentifier: {
          type: {
            coding: [
              {
                system: "http://terminology.hl7.org/CodeSystem/v2-0203",
                code: "MB"
              }
            ]
          },
          system: "https://github.com/inferno-framework/target-payer/identifiers/member",
          value: "99999",
          assigner: {
            display: "Old Payer"
          }
        }
      }
    ]
  }.to_json
  request.status = 200
end

#mock_operation_outcome_resource ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 200

def mock_operation_outcome_resource
  FHIR.from_contents(File.read("lib/davinci_pdex_test_kit/metadata/mock_operation_outcome_resource.json"))
end

#new_link ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 223

def new_link
  "#{Inferno::Application['base_url']}\/custom\/pdex_payer_client\/fhir"
end

#read_next_page(request, test = nil, test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 52

def read_next_page(request, test = nil, test_result = nil)
  response = server_proxy.get('', request.query_parameters)
  request.status = response.status
  request.response_headers = remove_transfer_encoding_header(response.headers)
  request.response_body = replace_bundle_urls(FHIR.from_contents(response.body)).to_json
end

#referenced_entities(resource, entries, root_url) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 181

def referenced_entities(resource, entries, root_url)
  matches = []
  attributes = resource&.source_hash&.keys
  attributes.each do |attr|
    value = resource.send(attr.to_sym)
    if value.is_a?(FHIR::Reference) && value.reference.present?
      match = find_matching_entry(value.reference, entries, root_url)
      if match.present? && matches.none?(match)
        value.reference = match.fullUrl
        matches.concat([match], referenced_entities(match.resource, entries, root_url))
      end
    elsif value.is_a?(Array) && value.all? { |elmt| elmt.is_a?(FHIR::Model) }
      value.each { |val| matches.concat(referenced_entities(val, entries, root_url)) }
    end
  end

  matches
end

#relative_reference?(ref) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 277

def relative_reference?(ref)
  ref&.count('/') == 1
end

#remove_transfer_encoding_header(headers) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 134

def remove_transfer_encoding_header(headers)
  if !headers["transfer-encoding"].nil?
    headers.reject!{|key, value| key == "transfer-encoding"}
  else
    headers
  end
end

#replace_bundle_urls(bundle) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 204

def replace_bundle_urls(bundle)
  reference_server_base = ENV.fetch('FHIR_REFERENCE_SERVER')
  bundle&.link.map! {|link| {relation: link.relation, url: link.url.gsub(reference_server_base, new_link)}}
  bundle&.entry&.map! do |bundled_resource| 
    {fullUrl: bundled_resource.fullUrl.gsub(reference_server_base, new_link),
     resource: bundled_resource.resource,
     search: bundled_resource.search
    }
  end
  bundle
end

#replace_export_urls(export_status_output) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 216

def replace_export_urls(export_status_output)
  reference_server_base = ENV.fetch('FHIR_REFERENCE_SERVER')
  export_status_output['output'].map! { |binary| {type: binary["type"], url: binary["url"].gsub(reference_server_base, new_link)} }
  export_status_output['request'] = new_link + '/Patient/$export'
  export_status_output
end

#resource_endpoint(url) ⇒ Object

Pull resource type from url e.g. example.org/fhir/Patient/123 -> Patient



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 174

def resource_endpoint(url)
  return unless url.start_with?('http://', 'https://')

  /custom\/pdex_payer_client\/fhir\/(.*)\?/.match(url)[1]
end

#server_proxy ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 16

def server_proxy
  @server_proxy ||= Faraday.new(
      url: ENV.fetch('FHIR_REFERENCE_SERVER'),
      params: {},
      headers: {'Content-Type' => 'application/json', 'Authorization' => 'Bearer SAMPLE_TOKEN', 'Host' => ENV.fetch('HOST_HEADER')},
    ) do |proxy| 
      proxy.use FaradayMiddleware::Gzip
    end
end

#token_response(request, _test = nil, _test_result = nil) ⇒ Object 



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# File 'lib/davinci_pdex_test_kit/mock_server.rb', line 26

def token_response(request, _test = nil, _test_result = nil)
  # Placeholder for a more complete mock token endpoint
  request.response_body = { access_token: SecureRandom.hex, token_type: 'bearer', expires_in: 300 }.to_json
  request.status = 200
end