Parses an Amazon Resource Name (ARN) and returns its component parts as an object.

parseArn.cfc

/**
* @hint Parses an Amazon Resource Name (ARN) and returns its component parts as an object.
* This follows the general format of ARNs outlined by Amazon (http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html), but does not fully account for all possible formats
* Derived from https://gist.github.com/gene1wood/5299969edc4ef21d8efcfea52158dd40
*/
public struct function parseArn( required string arn ) {
  var elements = arn.listToArray( ':', true );
  var result = {
    'original' : arn,
    'arn' : elements[1],
    'partition' : elements[2],
    'service' : elements[3],
    'region' : elements[4],
    'account' : elements[5]
  };

  if ( elements.len() >= 7 ) {
    result[ 'resourcetype' ] = elements[6];
    result[ 'resource' ] = elements[7];
  } else if ( !elements[6].find( '/' ) ) {
    result[ 'resource' ] = elements[6];
    result[ 'resourcetype' ] = '';
  } else {
    result[ 'resourcetype' ] = elements[6].listFirst( '/' );
    result[ 'resource' ] = elements[6].listRest( '/' );
  }

  return result;
}