How to download STANDARD-XML metadata from RETS using PHRETS - php

Question

Is there any solution to download STANDARD-XML metadata from RETS using PHRETS?
Currently am able to extract each class metadata as an array using PHRETS function GetMetadataTable and combining & converting to XML format.
But then recently I found difference in single STANDARD-XML metadata(of entire resources and classes) and individual class metadata. Using metadata viewer service RETSMD.com(built on PHRETS) also, the class name getting from STANDARD-XML metadata is different and unable to view the details.
Note: I got the STANDARD-XML metadata via direct browser log-in using credentials, like this
http://rets.login.url/GetMetadata?Type=METADATA-TABLE&Format=STANDARD-XML&ID=0
Anyone faced the same? Is there any solution using PHP?
Thanks in Advance!

Answer 1

I got a solution by modifying PHRETS library.
Added a new function there with following code,
if (empty($this->capability_url['GetMetadata'])) {
die("GetServerInformation() called but unable to find GetMetadata location. Failed login?\n");
}
$optional_params['Type'] = 'METADATA-SYSTEM';
$optional_params['ID'] = '*';
$optional_params['Format'] = 'STANDARD-XML';
//request server information
$result = $this->RETSRequest($this->capability_url['GetMetadata'], $optional_params );
if (!$result) {
return false;
}
list($headers, $body) = $result;
$xml = $this->ParseXMLResponse($body);
Note: Main thing to note is,
$optional_params['ID'] = '*';
Should be '*' instead '0'

Answer 2

If anyone is still unable to retrieve STANDARD-XML data from the CREA DDF data feed using PhRETS v2.x.x, I created a fork to the ./src/Parsers/Search/OneX.php file. You can add the following protected methods to the end of the file:
protected function parseDDFStandardXMLData(&$xml)
{
// we can only work with an array
$property_details = json_decode(json_encode($xml), true);
$retn = array();
if(! empty($property_details['RETS-RESPONSE']['PropertyDetails'])) {
foreach($property_details['RETS-RESPONSE']['PropertyDetails'] as $property_array) {
$retn[] = $this->parseArrayElements(null, $property_array);
}
}
return $retn;
}
protected function parseArrayElements($parent_key, $element)
{
// three possible $element types
// 1. scalar value
// 2. sub-array
// 3. SimpleXMLElement Object
$retn = array();
if(is_object($element)) {
$element = json_decode(json_encode($element), true);
}
if(is_array($element)) {
foreach($element as $node_key => $node) {
$key = $node_key;
if(! empty($parent_key)) {
$key = $parent_key . '|' . $key;
}
if(is_array($node) || is_object($node)) {
$nodes = $this->parseArrayElements($key, $node);
if(!empty($nodes)) {
foreach($nodes as $k => $n) {
$retn[$k] = $n;
}
}
}else{
$retn[$key] = $node;
}
}
}else{
$retn[$parent_key] = $element;
}
return $retn;
}
protected function parseRecordFromArray(&$array, Results $rs)
{
$r = new Record;
foreach($rs->getHeaders() as $key => $name) {
$r->set($name, $array[$name]);
}
return $r;
}
Then replace the parseRecords() method with:
protected function parseRecords(Session $rets, &$xml, $parameters, Results $rs)
{
if (isset($xml->DATA)) {
foreach ($xml->DATA as $line) {
$rs->addRecord($this->parseRecordFromLine($rets, $xml, $parameters, $line, $rs));
}
}elseif (isset($xml->{"RETS-RESPONSE"}->PropertyDetails)) {
$data = $this->parseDDFStandardXMLData($xml);
if(! empty($data)) {
$fields_saved = false;
foreach ($data as $line) {
if(!$fields_saved) {
$rs->setHeaders(array_keys($line));
}
$rs->addRecord($this->parseRecordFromArray($line, $rs));
}
}
}
}
The line, }elseif (isset($xml->{"RETS-RESPONSE"}->PropertyDetails)) { in the latter method does the trick to identify the STANDARD-XML RETS-RESPONSE node and parse the data.
Hope this helps,
Cheers!