526 lines
19 KiB
PHP
526 lines
19 KiB
PHP
<?php
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namespace App\Http\Controllers\Oai;
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use Illuminate\Http\Request;
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use App\Http\Controllers\Controller;
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use App\Models\Dataset;
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use Illuminate\Support\Facades\Log;
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use App\Exceptions\OaiModelException;
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use Illuminate\Database\Eloquent\ModelNotFoundException;
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use App\Models\Oai\OaiModelError;
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use App\Models\Oai\ResumptionToken;
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class RequestController extends Controller
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{
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/**
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* Holds information about which dataset state aka server_state
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* are delivered out
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*
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* @var array
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*/
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private $deliveringDocumentStates = array('published', 'deleted'); // maybe deleted documents too
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private $xMetaDissRestriction = array('doctoralthesis', 'habilitation');
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const SET_SPEC_PATTERN = '[A-Za-z0-9\-_\.!~\*\'\(\)]+';
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/**
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* Holds xml representation of document information to be processed.
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*
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* @var \DomDocument Defaults to null.
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*/
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protected $_xml = null;
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/**
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* Holds the stylesheet for the transformation.
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*
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* @var \DomDocument Defaults to null.
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*/
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protected $xslt = null;
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/**
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* Holds the xslt processor.
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*
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* @var \XSLTProcessor Defaults to null.
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*/
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protected $_proc = null;
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/**
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* Load an xslt stylesheet.
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*
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* @return void
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*/
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private function loadStyleSheet($stylesheet)
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{
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$this->xslt = new \DomDocument;
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$this->xslt->load($stylesheet);
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$this->_proc->importStyleSheet($this->xslt);
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if (isset($_SERVER['HTTP_HOST'])) {
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$this->_proc->setParameter('', 'host', $_SERVER['HTTP_HOST']);
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}
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//$this->_proc->setParameter('', 'server', $this->getRequest()->getBaseUrl());
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}
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public function __construct()
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{
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//$this->middleware('auth');
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// Initialize member variables.
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$this->_xml = new \DomDocument;
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$this->_proc = new \XSLTProcessor;
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}
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public function index(Request $request)
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{
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// to handle POST and GET Request, take any given parameter
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$oaiRequest = $request->all();
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$safeRemoveParameters = array('module', 'controller', 'action', 'role');
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foreach ($safeRemoveParameters as $parameter) {
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unset($oaiRequest[$parameter]);
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}
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try {
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$this->__handleRequest($oaiRequest);
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} catch (OaiModelException $e) {
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$errorCode = OaiModelError::mapCode($e->getCode());
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//$this->getLogger()->err($errorCode);
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$this->_proc->setParameter('', 'oai_error_code', $errorCode);
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//$this->getLogger()->err($e->getMessage());
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$this->_proc->setParameter('', 'oai_error_message', htmlentities($e->getMessage()));
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} catch (Exception $e) {
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//$this->getLogger()->err($e);
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$this->_proc->setParameter('', 'oai_error_code', 'unknown');
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$this->_proc->setParameter('', 'oai_error_message', 'An internal error occured.');
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//$this->getResponse()->setHttpResponseCode(500);
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}
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// $xml = $this->_xml->saveXML();
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$xml = $this->_proc->transformToXML($this->_xml);
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//$xml = $this->doc->asXML();
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return response($xml)//->view('rss', array('rss'=>$this->rss))
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->header('Content-Type', 'application/xml')
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->header('charset', 'utf-8');
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}
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private function __handleRequest(array $oaiRequest)
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{
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// Setup stylesheet
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$this->loadStyleSheet('datasetxml2oai-pmh.xslt');
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// Set response time
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$this->_proc->setParameter('', 'responseDate', date("Y-m-d\TH:i:s\Z"));
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// set OAI base url
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$uri = explode('?', $_SERVER['REQUEST_URI'], 2);
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$this->_proc->setParameter('', 'baseURL', url('/') . $uri[0]);
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if (isset($oaiRequest['verb'])) {
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$this->_proc->setParameter('', 'oai_verb', $oaiRequest['verb']);
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if ($oaiRequest['verb'] == 'Identify') {
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$this->handleIdentify();
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} elseif ($oaiRequest['verb'] == 'ListMetadataFormats') {
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$this->handleListMetadataFormats();
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} elseif ($oaiRequest['verb'] == 'ListRecords') {
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$this->handleListRecords($oaiRequest);
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} elseif ($oaiRequest['verb'] == 'GetRecord') {
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$this->handleGetRecord($oaiRequest);
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} elseif ($oaiRequest['verb'] == 'ListIdentifiers') {
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$this->handleListIdentifiers($oaiRequest);
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} elseif ($oaiRequest['verb'] == 'ListSets') {
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$this->handleListSets($oaiRequest);
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} else {
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$this->handleIllegalVerb();
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}
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} else {
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$oaiRequest['verb'] = 'Identify';
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$this->_proc->setParameter('', 'oai_verb', $oaiRequest['verb']);
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$this->doc = $this->handleIdentify();
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}
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}
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/**
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* Implements response for OAI-PMH verb 'Identify'.
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*
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* @return void
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*/
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private function handleIdentify()
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{
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$email = "repository@geologie.ac.at";
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$repositoryName = "RDR - Data Research Repository";
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$repIdentifier = "rdr.gba.ac.at";
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$sampleIdentifier = "oai:" . $repIdentifier . ":27";//$this->_configuration->getSampleIdentifier();
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$earliestDateFromDb = Dataset::earliestPublicationDate();
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// set parameters for oai-pmh.xslt
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$this->_proc->setParameter('', 'email', $email);
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$this->_proc->setParameter('', 'repositoryName', $repositoryName);
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$this->_proc->setParameter('', 'repIdentifier', $repIdentifier);
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$this->_proc->setParameter('', 'sampleIdentifier', $sampleIdentifier);
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$this->_proc->setParameter('', 'earliestDatestamp', $earliestDateFromDb);
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$this->_xml->appendChild($this->_xml->createElement('Datasets'));
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}
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/**
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* Implements response for OAI-PMH verb 'GetRecord'.
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*
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* @param array &$oaiRequest Contains full request information
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* @return void
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*/
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private function handleGetRecord(array &$oaiRequest)
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{
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// Identifier references metadata Urn, not plain Id!
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// Currently implemented as 'oai:foo.bar.de:{docId}' or 'urn:nbn...-123'
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$dataId = $this->getDocumentIdByIdentifier($oaiRequest['identifier']);
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$dataset = null;
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try {
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//$dataset = new Opus_Document($docId);
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$dataset = Dataset::findOrFail($dataId);
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} catch (ModelNotFoundException $ex) {
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throw new OaiModelException(
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'The value of the identifier argument is unknown or illegal in this repository.',
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OaiModelError::IDDOESNOTEXIST
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);
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}
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$metadataPrefix = $oaiRequest['metadataPrefix'];
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// do not deliver datasets which are restricted by document state
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if (is_null($dataset)
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//or (false === in_array($dataset->getServerState(), $this->_deliveringDocumentStates))
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or (false === $dataset->whereIn('server_state', $this->deliveringDocumentStates))
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or (false === $dataset->hasEmbargoPassed())) {
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throw new OaiModelException('Document is not available for OAI export!', OaiModelError::NORECORDSMATCH);
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}
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$this->_xml->appendChild($this->_xml->createElement('Datasets'));
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$this->createXmlRecord($dataset);
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}
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/**
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* Retrieve a document id by an oai identifier.
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*
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* @param string $oaiIdentifier
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* @result int
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*/
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private function getDocumentIdByIdentifier($oaiIdentifier)
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{
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$identifierParts = explode(":", $oaiIdentifier);
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$dataId = null;
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switch ($identifierParts[0]) {
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case 'oai':
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if (isset($identifierParts[2])) {
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$dataId = $identifierParts[2];
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}
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break;
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default:
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throw new OaiModelException(
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'The prefix of the identifier argument is unknown.',
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OaiModelError::BADARGUMENT
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);
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break;
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}
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if (empty($dataId) or !preg_match('/^\d+$/', $dataId)) {
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throw new Oai_Model_Exception(
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'The value of the identifier argument is unknown or illegal in this repository.',
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Oai_Model_Error::IDDOESNOTEXIST
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);
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}
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return $dataId;
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}
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/**
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* Implements response for OAI-PMH verb 'ListMetadataFormats'.
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*
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* @param array &$oaiRequest Contains full request information
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* @return void
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*/
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private function handleListMetadataFormats()
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{
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$this->_xml->appendChild($this->_xml->createElement('Datasets'));
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}
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/**
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* Implements response for OAI-PMH verb 'ListRecords'.
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*
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* @param array &$oaiRequest Contains full request information
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* @return void
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*/
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private function handleListRecords($oaiRequest)
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{
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$maxRecords = 20;//$this->_configuration->getMaxListRecords();
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$this->handlingOfLists($oaiRequest, $maxRecords);
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}
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/**
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* Implements response for OAI-PMH verb 'ListIdentifiers'.
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*
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* @param array &$oaiRequest Contains full request information
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* @return void
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*/
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private function handleListIdentifiers(array &$oaiRequest)
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{
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$maxIdentifier = 5;//$this->_configuration->getMaxListIdentifiers();
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$this->handlingOfLists($oaiRequest, $maxIdentifier);
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}
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/**
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* Implements response for OAI-PMH verb 'ListSets'.
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*
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* @param array &$oaiRequest Contains full request information
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* @return void
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*/
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private function handleListSets()
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{
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$repIdentifier = "rdr.gba.ac.at";
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$this->_proc->setParameter('', 'repIdentifier', $repIdentifier);
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$this->_xml->appendChild($this->_xml->createElement('Datasets'));
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//$oaiSets = new Oai_Model_Sets();
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$sets = array(
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'bibliography:true' => 'Set for bibliographic entries',
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'bibliography:false' => 'Set for non-bibliographic entries',
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);
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$sets = array_merge(
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$sets,
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$this->getSetsForDocumentTypes()
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);
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//$sets = $this->getSetsForDocumentTypes();
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foreach ($sets as $type => $name) {
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$opusDoc = $this->_xml->createElement('Rdr_Sets');
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$typeAttr = $this->_xml->createAttribute('Type');
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$typeValue = $this->_xml->createTextNode($type);
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$typeAttr->appendChild($typeValue);
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$opusDoc->appendChild($typeAttr);
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$nameAttr = $this->_xml->createAttribute('TypeName');
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$nameValue = $this->_xml->createTextNode($name);
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$nameAttr->appendChild($nameValue);
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$opusDoc->appendChild($nameAttr);
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$this->_xml->documentElement->appendChild($opusDoc);
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}
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}
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private function handleIllegalVerb()
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{
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$this->_proc->setParameter('', 'oai_error_code', 'badVerb');
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$this->_proc->setParameter('', 'oai_error_message', 'The verb provided in the request is illegal.');
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}
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/**
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* Helper method for handling lists.
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*
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* @param array $oaiRequest query parameter
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* @param mixed $maxRecords max count of records
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*
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* @return void
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*/
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private function handlingOfLists(array &$oaiRequest, $maxRecords)
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{
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if (true === empty($maxRecords)) {
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$maxRecords = 100;
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}
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$repIdentifier = "rdr.gba.ac.at";
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$tokenTempPath = storage_path('app/resumption'); //$this->_configuration->getResumptionTokenPath();
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$this->_proc->setParameter('', 'repIdentifier', $repIdentifier);
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$this->_xml->appendChild($this->_xml->createElement('Datasets'));
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// do some initialisation
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$cursor = 0;
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//$totalIds = 0;
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$start = $maxRecords + 1;
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$reldocIds = array();
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$metadataPrefix = null;
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if (true === array_key_exists('metadataPrefix', $oaiRequest)) {
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$metadataPrefix = $oaiRequest['metadataPrefix'];
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}
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$this->_proc->setParameter('', 'oai_metadataPrefix', $metadataPrefix);
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// parameter resumptionToken is given
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if (false === empty($oaiRequest['resumptionToken'])) {
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$tokenWorker = new ResumptionToken();
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$resParam = $oaiRequest['resumptionToken'];
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} else {
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// no resumptionToken is given
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$finder = Dataset::query();
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// add server state restrictions
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$finder->whereIn('server_state', $this->deliveringDocumentStates);
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if (array_key_exists('set', $oaiRequest)) {
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$setarray = explode(':', $oaiRequest['set']);
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if ($setarray[0] == 'data-type') {
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if (count($setarray) === 2 and !empty($setarray[1])) {
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$finder->where('type', $setarray[1]);
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}
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}
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}
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$totalIds = $finder->count();
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$reldocIds = $finder->pluck('id')->toArray();
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}
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// handling of document ids
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$restIds = $reldocIds;
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$workIds = array_splice($restIds, 0, $maxRecords);
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//foreach ($datasets as $dataset)
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foreach ($workIds as $dataId) {
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$dataset = Dataset::findOrFail($dataId);
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$this->createXmlRecord($dataset);
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}
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}
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private function createXmlRecord(Dataset $dataset)
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{
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//$node = $this->_xml->createElement('Rdr_Dataset');
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$domNode = $this->getDatasetXmlDomNode($dataset);
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// add frontdoor url
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$this->addLandingPageAttribute($domNode, $dataset->id);
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// add access rights to element
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//$this->_addAccessRights($domNode, $dataset);
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$node = $this->_xml->importNode($domNode, true);
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//$node->setAttribute("Id", $dataset->id);
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//$node->setAttribute("ServerState", $dataset->server_state);
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////$child = new \DOMElement("ServerDateModified");
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//$child = $this->_xml->createElement('ServerDateModified');
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//$child->setAttribute("Year", $dataset->server_date_modified->format('Y'));
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//$child->setAttribute("Month", $dataset->server_date_modified->month);
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//$child->setAttribute("Day", $dataset->server_date_modified->day);
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//$node->appendChild($child);
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//$type = $dataset->type;
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$this->addSpecInformation($node, 'data-type:' . $dataset->type);
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//$this->addSpecInformation($node, 'bibliography:' . 'false');
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$this->_xml->documentElement->appendChild($node);
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}
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/**
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* Add the landingpage attribute to Rdr_Dataset XML output.
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*
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* @param \DOMNode $document Rdr_Dataset XML serialisation
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* @param string $docid Id of the dataset
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* @return void
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*/
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private function addLandingPageAttribute(\DOMNode $document, $dataid)
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{
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$url = route('frontend.dataset.show', $dataid);
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$owner = $document->ownerDocument;
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$attr = $owner->createAttribute('landingpage');
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$attr->appendChild($owner->createTextNode($url));
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$document->appendChild($attr);
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}
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private function addSpecInformation(\DOMNode $document, $information)
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{
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$setSpecAttribute = $this->_xml->createAttribute('Value');
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$setSpecAttributeValue = $this->_xml->createTextNode($information);
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$setSpecAttribute->appendChild($setSpecAttributeValue);
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$setSpecElement = $this->_xml->createElement('SetSpec');
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//$setSpecElement =new \DOMElement("SetSpec");
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$setSpecElement->appendChild($setSpecAttribute);
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$document->appendChild($setSpecElement);
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}
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private function getDatasetXmlDomNode($dataset)
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{
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if (!in_array($dataset->server_state, $this->deliveringDocumentStates)) {
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$message = 'Trying to get a document in server state "' . $dataset->server_state . '"';
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//Zend_Registry::get('Zend_Log')->err($message);
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Log::error("server state: $message");
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throw new \Exception($message);
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}
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$dataset->fetchValues();
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$xmlModel = new \App\Library\Xml\XmlModel();
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$xmlModel->setModel($dataset);
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$xmlModel->excludeEmptyFields();
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$xmlModel->setXmlCache(new \App\Models\XmlCache());
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return $xmlModel->getDomDocument()->getElementsByTagName('Rdr_Dataset')->item(0);
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}
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/**
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* Returns oai sets for document types.
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* @return array
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*/
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private function getSetsForDocumentTypes()
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{
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$setSpecPattern = self::SET_SPEC_PATTERN;
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$sets = array();
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$finder = new \App\Models\DatasetFinder();
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$finder->setServerState('published');
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foreach ($finder->groupedTypesPlusCount() as $doctype => $row) {
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if (0 == preg_match("/^$setSpecPattern$/", $doctype)) {
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$msg = "Invalid SetSpec (doctype='" . $doctype . "')."
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. " Allowed characters are [$setSpecPattern].";
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Log::error("OAI-PMH: $msg");
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continue;
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}
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$setSpec = 'data-type:' . $doctype;
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// $count = $row['count'];
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$sets[$setSpec] = "Set for document type '$doctype'";
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}
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return $sets;
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}
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private function handleIdentifyOld()
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{
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//$earliestDateFromDb = Opus_Document::getEarliestPublicationDate();
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// $earliestDateFromDb = Dataset::select('server_date_created')
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// ->orderBy('server_date_created', 'desc')
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// ->first()->toDateTimeString();
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$earliestDateFromDb = Dataset::earliestPublicationDate();
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$sxe = new \SimpleXMLElement(
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'<?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="xsl/oai2.xslt"?><OAI-PMH/>'
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);
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$sxe->addAttribute('xmlns', 'http://www.openarchives.org/OAI/2.0/');
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$sxe->addAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
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$sxe->addAttribute('xmlns:mml', 'http://www.w3.org/1998/Math/MathML');
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$sxe->addAttribute(
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'xsi:schemaLocation',
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'http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd'
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);
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$sxe->addChild('responseDate', date("Y-m-d\TH:i:s\Z"));
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$uri = explode('?', $_SERVER['REQUEST_URI'], 2);
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$requestChild = $sxe->addChild('request', url('/') . $uri[0]);
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$requestChild->addAttribute('verb', 'Identify');
|
|
|
|
$identify = $sxe->addChild('Identify');
|
|
$identify->addChild('repositoryName', "Data Research Repository");
|
|
$identify->addChild('baseURL', "http://rdr.gba.geolba.ac.at/");
|
|
$identify->addChild('protocolVersion', '2.0');
|
|
$identify->addChild('adminEmail', 'repository@geologie.ac.at');
|
|
//$identify->addChild('earliestDatestamp', '2017-04-07');
|
|
$identify->addChild('earliestDatestamp', $earliestDateFromDb);
|
|
$identify->addChild('deletedRecord', 'persistent');
|
|
|
|
//$description = $identify->addChild('description');
|
|
//$oaiIdentifier = $description->addChild('oai-identifier');
|
|
//$oaiIdentifier->addAttribute('xmlns', 'http://www.openarchives.org/OAI/2.0/oai-identifier');
|
|
//$oaiIdentifier->addAttribute('xsi:schemaLocation', 'http://www.openarchives.org/OAI/2.0/oai-identifier');
|
|
//$oaiIdentifier->addChild('scheme', 'oai');
|
|
|
|
return $sxe;
|
|
}
|
|
}
|