static fromSharedAccessSignature()

in device/core/src/sas_authentication_provider.ts [74:93]

• 17 lines of code
• 6 McCabe index (conditional complexity)

  static fromSharedAccessSignature(sharedAccessSignature: string): SharedAccessSignatureAuthenticationProvider {
    if (!sharedAccessSignature) {
      /*Codes_SRS_NODE_SAS_AUTHENTICATION_PROVIDER_16_005: [The `fromSharedAccessSignature` method shall throw a `ReferenceError` if the `sharedAccessSignature` argument is falsy.]*/
      throw new ReferenceError('sharedAccessSignature cannot be \'' + sharedAccessSignature + '\'');
    }
    const sas: SharedAccessSignature = SharedAccessSignature.parse(sharedAccessSignature);
    const decodedUri = decodeURIComponent(sas.sr);
    const uriSegments = decodedUri.split('/');
    const uriDeviceId = (uriSegments.length >= 3 && uriSegments[1] === 'devices') ? (uriSegments[2]) : null;
    const uriModuleId = (uriSegments.length >= 5 && uriSegments[3] === 'modules') ? (uriSegments[4]) : null;
    const credentials: TransportConfig = {
      host: uriSegments[0],
      deviceId: uriDeviceId,
      moduleId: uriModuleId,
      sharedAccessSignature: sharedAccessSignature
    };

    /*Codes_SRS_NODE_SAS_AUTHENTICATION_PROVIDER_16_006: [The `fromSharedAccessSignature` shall return a new `SharedAccessSignatureAuthenticationProvider` object initialized with the credentials parsed from the `sharedAccessSignature` argument.]*/
    return new SharedAccessSignatureAuthenticationProvider(credentials);
  }