data.php (76240b1) - qdmtl-ts.git

data.php

<?php

/**
 * Négociation de contenu pour data.qdmtl.ca : .htaccess + PHP
 * 
 * 1. URL rewriting pour générer le paramètre d'URL "path" passé à ce script
 * 2. Traitement avec gestion des URI bilingues
 * 
 * Local URL rewriting
 * http://127.0.0.1/~david/dev-web/qdmtl-triple-store/Batiment/1373-1377-de-la-Gauchetiere-Est
 * http://127\.0\.0\.1/~david/dev\-web/qdmtl\-triple\-store/([A-Z][a-z]+/.+)
 * 
 * Prod URL rewriting : voir .htaccess
 */

/** Redirection si paramètre path absent */
  if (!isset($_GET['path'])) {
    header('Location: ./');
    header('HTTP/1.1 301 Moved Permanently');
    exit();
  }

require 'parse-ini.php';
  require 'vendor/autoload.php';

/**
   * fonction use_path_to_query
   * Trois arguments :
   * requête, store, true pour var_dump() si debug nécessaire
   */
  function use_path_to_query($q, $s, $vd = false) {
    $rs = $s->query($q);

if (!$s->getErrors()) {

$index_returned_query_type = [
        'construct',
        'describe'
      ];

$result = (in_array($rs['query_type'], $index_returned_query_type))
        ? $rs
        : $rs['result']['rows'];

if ($vd) {
        var_dump($result);
        exit();
      }

return $result;

} else {
      var_dump($s->getErrors());
      exit();
    }
  }

$request_headers = getallheaders();

/**
   * Handling CORS
   * Deprecated since we allow any origin as of 2024-03-09
   */

/*
  $local_host_referer = (str_contains($request_headers['Referer'], "localhost"))
    ? "http://localhost"
    : "https://qdmtl.ca";
  header('Access-Control-Allow-Origin: ' . $local_host_referer);
  */

// allow any origin
  header('Access-Control-Allow-Origin: *');

/** Access to Accept header value */
  $accept_header = $request_headers['Accept'];

$config = array(
    'db_host'    => 'localhost',
    'db_name'    => $infos['db_name'],
    'db_user'    => $infos['db_user'],
    'db_pwd'     => $infos['db_pwd'],
    'store_name' => $infos['store_name'],
    'max_errors' => 1,
    'store_write_buffer' => 40000
  );

/** namespace prefixes */
  $ns = array(
    'dcterms' => 'http://purl.org/dc/terms/',
    'ecrm'    => 'http://erlangen-crm.org/current/',
    'geo'     => 'http://www.opengis.net/ont/geosparql#',
    'owl'     => 'http://www.w3.org/2002/07/owl#',
    'qdmtl'   => 'http://onto.qdmtl.ca/',
    'rdfs'    => 'http://www.w3.org/2000/01/rdf-schema#',
    'rico'    => 'https://www.ica.org/standards/RiC/ontology#',
    'schema'  => 'https://schema.org/'
  );
  $ns_config = array('ns' => $ns);

/** instantiation */
  $store = ARC2::getStore($config);
  $rdf_xml_serializer = ARC2::getRDFXMLSerializer($ns_config);

//  $store->createDBCon();

if (!$store->isSetUp()) {
    $store->setUp();
  }

$path = $_GET["path"];

// vérifier si objet de la prop owl:sameAs pour traduction
  $q = '
    PREFIX owl: <http://www.w3.org/2002/07/owl#>
    PREFIX qdmtld: <http://data.qdmtl.ca/>
    SELECT ?s
    WHERE {
        ?s owl:sameAs qdmtld:' . $path . ' .
    }
  ';

$has_sameAs = use_path_to_query($q, $store);

preg_match('/[A-Z][a-z]+\/(.+)/', $path, $chunked_path);

foreach ($has_sameAs as $sameAs) {
    preg_match('/http:\/\/data\.qdmtl\.ca\/([A-Z][a-z]+\/)(.+)/', $sameAs['s'], $chunked_uri_path);
    if ($chunked_path[1] == $chunked_uri_path[2])
      $path = $chunked_uri_path[1] . $chunked_uri_path[2];
  }

$q = '
    PREFIX qdmtld: <http://data.qdmtl.ca/>
    DESCRIBE qdmtld:' . $path;

$triples = use_path_to_query($q, $store);

if (!$triples['result']) {
    echo "SPARQL query returned 0 result";
    exit();
  }

/** json-ld */
  if ($accept_header == 'application/ld+json') {

$graph = new \EasyRdf\Graph(/*'http://data.qdmtl.ca/' . $path*/);

$graph->parse($triples['result']);
//    echo $graph->dump('html');exit();
//    var_dump($graph);exit();

$jsonld = $graph->serialise('application/ld+json', array(
      'expand_native_types' => null,
      'compact' => true,
      'context' => './qdmtl-context.jsonld',
      'expand' => null,
      'frame' => null
    ));

if (!is_scalar($jsonld)) {
          $jsonld = var_export($jsonld, true);
        }

header('Content-type: application/ld+json');  
    echo $jsonld;
    exit();
  }

/** RDF/XML */
  $rdf_xml_serialization = $rdf_xml_serializer->getSerializedIndex($triples['result']);
  header('Content-type: text/xml');
  echo $rdf_xml_serialization;

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