<?php

/**
 * Négociation de contenu pour vocab.qdmtl.ca : .htaccess + PHP
 */

  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();
    }
  }

  $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/',
    'skos'    => 'http://www.w3.org/2004/02/skos/core#'
  );
  $ns_config = array('ns' => $ns);

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

//  $store->createDBCon();

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

  $q = 'PREFIX skos:<http://www.w3.org/2004/02/skos/core#> CONSTRUCT{?s ?p ?o}WHERE{?s a skos:Concept;?p ?o.}';

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

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

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

?>