Module: Common::Client::Concerns::MHVJwtSessionClient

Extended by:
ActiveSupport::Concern
Includes:
MhvLockedSessionClient
Included in:
MhvFhirSessionClient
Defined in:
lib/common/client/concerns/mhv_jwt_session_client.rb

Overview

Module mixin for overriding session logic when making MHV JWT-based client connections

See Also:

Constant Summary

Constants included from MhvLockedSessionClient

Common::Client::Concerns::MhvLockedSessionClient::LOCK_RETRY_DELAY, Common::Client::Concerns::MhvLockedSessionClient::RETRY_ATTEMPTS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from MhvLockedSessionClient

#authenticate, #initialize, #invalid?, #refresh_session

Methods included from SentryLogging

#log_exception_to_sentry, #log_message_to_sentry, #non_nil_hash?, #normalize_level, #rails_logger

Instance Attribute Details

#session ⇒ Hash (readonly)

Returns a hash containing session information.

Returns:

  • (Hash) —

    a hash containing session information



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# File 'lib/common/client/concerns/mhv_jwt_session_client.rb', line 16

module MHVJwtSessionClient
  extend ActiveSupport::Concern
  include MhvLockedSessionClient

  protected

  def user_key
    session.icn
  end

  def session_config_key
    :mhv_mr_fhir_session_lock
  end

  ##
  # Creates a session
  #
  # @return [MedicalRecords::ClientSession] if a MR (Medical Records) client session
  #
  def get_session
    # Call the security endpoint to create an MHV session and get a JWT token.
    validate_session_params
    env = get_session_tagged
    jwt = get_jwt_from_headers(env.response_headers)
    decoded_token = decode_jwt_token(jwt)
    session.expires_at = extract_token_expiration(decoded_token)
    @session.class.new(user_id: session.user_id.to_s,
                       icn: session.icn,
                       expires_at: session.expires_at,
                       token: jwt)
  end

  private

  def get_jwt_from_headers(res_headers)
    # Get the JWT token from the headers
    auth_header = res_headers['authorization']
    if auth_header.nil? || !auth_header.start_with?('Bearer ')
      raise Common::Exceptions::Unauthorized, detail: 'Invalid or missing authorization header'
    end

    auth_header.sub('Bearer ', '')
  end

  def decode_jwt_token(jwt_token)
    JWT.decode jwt_token, nil, false
  rescue JWT::DecodeError
    raise Common::Exceptions::Unauthorized, detail: 'Invalid JWT token'
  end

  def extract_token_expiration(decoded_token)
    if decoded_token[0]['exp']
      Time.zone.at(decoded_token[0]['exp']).to_datetime.rfc2822
    else
      1.hour.from_now.rfc2822
    end
  end

  def validate_session_params
    raise Common::Exceptions::ParameterMissing, 'ICN' if session.icn.blank?
    raise Common::Exceptions::ParameterMissing, 'MHV MR App Token' if config.app_token.blank?
  end

  def get_session_tagged
    Raven.tags_context(error: 'mhv_session')
    env = perform(:post, '/mhvapi/security/v1/login', auth_body, auth_headers)
    Raven.context.tags.delete(:error)
    env
  end

  def jwt_bearer_token
    session.token
  end

  def patient_fhir_id
    session.patient_fhir_id
  end

  def auth_headers
    config.base_request_headers.merge('Content-Type' => 'application/json')
  end

  def auth_body
    {
      'appId' => '103',
      'appToken' => config.app_token,
      'subject' => session.icn,
      'userType' => 'PATIENT',
      'authParams' => {
        'PATIENT_SUBJECT_ID_TYPE' => 'ICN'
      }
    }
  end
end

Instance Method Details

#get_session ⇒ MedicalRecords::ClientSession (protected)

Creates a session

Returns:



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# File 'lib/common/client/concerns/mhv_jwt_session_client.rb', line 35

def get_session
  # Call the security endpoint to create an MHV session and get a JWT token.
  validate_session_params
  env = get_session_tagged
  jwt = get_jwt_from_headers(env.response_headers)
  decoded_token = decode_jwt_token(jwt)
  session.expires_at = extract_token_expiration(decoded_token)
  @session.class.new(user_id: session.user_id.to_s,
                     icn: session.icn,
                     expires_at: session.expires_at,
                     token: jwt)
end

#session_config_key ⇒ Object (protected) 



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# File 'lib/common/client/concerns/mhv_jwt_session_client.rb', line 26

def session_config_key
  :mhv_mr_fhir_session_lock
end

#user_key ⇒ Object (protected) 



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# File 'lib/common/client/concerns/mhv_jwt_session_client.rb', line 22

def user_key
  session.icn
end