function test_number_of_resources_remains_constant_after_skolemise_bnodes()
{
$graph = new SimpleGraph(file_get_contents(dirname(__FILE__) . '/documents/ckan-ds.ttl'));
$index = $graph->get_index();
$before = count($graph->get_subjects());
$graph->skolemise_bnodes('http://example.com/test/');
$after = count($graph->get_subjects());
$this->assertEquals($before, $after, "skolemise_bnodes shouldn't reduce the number of resources");
}
function test_from_turtle_parses_datatypes()
{
$g = new SimpleGraph();
$g->from_turtle('<http://example.org/subj> <http://example.org/pred> "1390"^^<http://www.w3.org/2001/XMLSchema#gYear> .');
$this->assertEquals(1, count($g->get_triples()));
$index = $g->get_index();
$this->assertEquals("1390", $index['http://example.org/subj']['http://example.org/pred'][0]['value']);
$this->assertEquals("http://www.w3.org/2001/XMLSchema#gYear", $index['http://example.org/subj']['http://example.org/pred'][0]['datatype']);
}
/**
* mirror_from_url
*
* @return array of responses from http requests, and overall success status
* @author Keith Alexander
*
*
**/
function mirror_from_url($url, $rdf_content = false)
{
$return = array('get_page' => false, 'get_copy' => false, 'put_page' => false, 'update_data' => false, 'success' => false);
if (empty($this->request_factory)) {
$this->request_factory = new HttpRequestFactory();
}
$last_cached_page_uri = $this->get_contentbox()->uri . '/mirrors/' . $url;
if (!$rdf_content) {
$web_page_request = $this->request_factory->make('GET', $url);
$web_page_request->set_accept('application/rdf+xml;q=0.8,text/turtle;q=0.9,*/*;q=0.1');
$web_page_response = $web_page_request->execute();
$return['get_page'] = $web_page_response;
$web_page_content = $web_page_response->body;
} else {
$web_page_content = $rdf_content;
$return['rdf_content'] = $rdf_content;
}
if ($rdf_content or $web_page_response->is_success()) {
$newGraph = new SimpleGraph();
$newGraph->add_rdf($web_page_content, $url);
$newGraph->add_resource_triple($url, OPEN_LASTCACHEDPAGE, $last_cached_page_uri);
$newGraph->skolemise_bnodes($last_cached_page_uri . '/');
$after = $newGraph->get_index();
# get previous copy if it exists
$cached_page_request = $this->request_factory->make('GET', $last_cached_page_uri, $this->credentials);
$cached_page_response = $cached_page_request->execute();
$return['get_copy'] = $cached_page_response;
if ($cached_page_response->status_code == '200') {
$before = json_decode($cached_page_response->body, true);
} else {
if ($cached_page_response->status_code == '404') {
$before = false;
} else {
return $return;
}
}
# build new changeset
$Changeset = new ChangeSet(array('before' => $before, 'after' => $after, 'creatorName' => 'Store::mirror_from_url', 'changeReason' => 'mirroring from ' . $url));
if ($Changeset->has_changes()) {
$return['update_data'] = $this->get_metabox()->apply_changeset($Changeset);
if ($return['update_data']->is_success()) {
$return['success'] = true;
} else {
if ($return['update_data']->status_code == '409') {
# Conflict. some statements already removed.
$before_graph = new SimpleGraph($before);
$return['reapply_before_triples'] = $this->get_metabox()->submit_turtle($before_graph->to_turtle());
if ($return['reapply_before_triples']->status_code == '204') {
#Succeeded. No content
$return['update_data'] = $this->get_metabox()->apply_changeset($Changeset);
$return['success'] = $return['update_data']->is_success();
}
} else {
return $return;
}
}
$put_page_request = $this->request_factory->make('PUT', $last_cached_page_uri, $this->credentials);
$put_page_request->set_body($newGraph->to_json());
$put_page_request->set_content_type('application/json');
$put_page_response = $put_page_request->execute();
$return['put_page'] = $put_page_response;
$return['success'] = $put_page_response->is_success();
return $return;
} else {
$return['success'] = true;
return $return;
}
} else {
return $return;
}
}
/**
* mirror_from_uri:
*
* @return array of responses from http requests, and overall success status
* @author Keith Alexander
*
*
**/
function mirror_from_uri($url, $rdf_content = false)
{
$return = array('get_page' => false, 'get_copy' => false, 'update_data' => false, 'success' => false);
if (empty($this->request_factory)) {
$this->request_factory = new HttpRequestFactory();
}
if (!$rdf_content) {
$web_page_request = $this->request_factory->make('GET', $url);
$web_page_request->set_accept('application/rdf+xml;q=0.8,text/turtle;q=0.9,*/*;q=0.1');
$web_page_response = $web_page_request->execute();
$return['get_page'] = $web_page_response;
$web_page_content = $web_page_response->body;
} else {
$web_page_content = $rdf_content;
$return['rdf_content'] = $rdf_content;
}
if ($rdf_content or $web_page_response->is_success()) {
$newGraph = new SimpleGraph();
$newGraph->add_rdf($web_page_content, $url);
$jsonGraphContent = $newGraph->to_json();
$newGraph->add_resource_triple($url, OPEN_JSON, $jsonGraphContent);
$newGraph->skolemise_bnodes(trim($url, '#') . '#');
$after = $newGraph->get_index();
# get previous copy if it exists
$cached_page_response = $this->describe($url, 'json');
$return['get_copy'] = $cached_page_response;
if ($cached_page_response->status_code == '200') {
$description_index = json_decode($cached_page_response->body, true);
if (isset($description_index[$url]) and isset($description_index[$url][OPEN_JSON])) {
$before = json_decode($description_index[$url][OPEN_JSON][0]['value'], 1);
} else {
$before = false;
}
} else {
if ($cached_page_response->status_code == '404') {
$before = false;
} else {
return $return;
}
}
# build new changeset
$Changeset = new ChangeSet(array('before' => $before, 'after' => $after, 'creatorName' => 'Graph::mirror_from_uri', 'changeReason' => 'mirroring from ' . $url));
if ($Changeset->has_changes()) {
$return['update_data'] = $this->apply_changeset($Changeset);
if ($return['update_data']->is_success()) {
$return['success'] = true;
} else {
if ($return['update_data']->status_code == '409') {
# Conflict. some statements already removed.
$before_graph = new SimpleGraph($before);
$return['reapply_before_triples'] = $this->get_metabox()->submit_turtle($before_graph->to_turtle());
if ($return['reapply_before_triples']->status_code == '204') {
#Succeeded. No content
$return['update_data'] = $this->get_metabox()->apply_changeset($Changeset);
$return['success'] = $return['update_data']->is_success();
}
} else {
return $return;
}
}
return $return;
} else {
$return['success'] = true;
return $return;
}
} else {
return $return;
}
}
function get_differences($query_results)
{
$res = $query_results;
$g_before = new SimpleGraph();
$g_after = new SimpleGraph();
$row_count = $res->num_rows();
$node_index = 0;
$diffs = array();
if ($row_count === 0) {
if ($this->_subject) {
$s = $this->_subject;
} else {
$s = "_:s";
}
$g_after = $this->get_data_as_graph($s);
$index = $g_after->get_index();
if (array_key_exists($s, $index)) {
$additions = $index[$s];
} else {
$additions = array();
}
$diffs[$s] = array('additions' => $additions, 'removals' => array());
} else {
$subjects = array();
for ($i = 0; $i < $row_count; $i++) {
$row = $res->row_array($i);
$rowdata = $res->rowdata($i);
if (array_key_exists('_uri', $row)) {
$s = $row['_uri'];
} else {
if ($this->_subject) {
$s = $this->_subject;
} else {
$s = "_:s";
}
}
$subjects[] = $s;
foreach ($this->_data as $field => $field_info) {
if (array_key_exists($field, $row)) {
$p = $this->_rmap[$field];
if ($rowdata[$field]['type'] === 'literal') {
$g_before->add_literal_triple($s, $p, $row[$field], $rowdata[$field]['lang'], $rowdata[$field]['datatype']);
} else {
if ($rowdata[$field]['type'] === 'uri') {
$g_before->add_resource_triple($s, $p, $row[$field]);
} else {
if ($rowdata[$field]['type'] === 'bnode') {
$g_before->add_resource_triple($s, $p, '_:' . $row[$field]);
}
}
}
}
}
}
if (count($subjects) > 0) {
$subjects = array_unique($subjects);
foreach ($subjects as $s) {
$g_after->add_graph($this->get_data_as_graph($s));
}
}
if ($g_after->is_empty()) {
$additions = array();
if ($g_before->is_empty()) {
$removals = array();
} else {
$removals = $g_before->get_index();
}
} else {
if ($g_before->is_empty()) {
$additions = $g_after->get_index();
$removals = array();
} else {
$removals = SimpleGraph::diff($g_before->get_index(), $g_after->get_index());
$additions = SimpleGraph::diff($g_after->get_index(), $g_before->get_index());
}
}
foreach ($subjects as $s) {
$diff = array('additions' => array(), 'removals' => array());
if (array_key_exists($s, $additions)) {
$diff['additions'] = $additions[$s];
}
if (array_key_exists($s, $removals)) {
$diff['removals'] = $removals[$s];
}
$diffs[$s] = $diff;
}
}
return $diffs;
}
if ($doc_type == 'json') {
send_json('200 OK', $g->to_json(), $content_location, $etag);
} else {
header("Content-Type: text/html; charset=UTF-8");
$title = $g->get_label($resource_uri, TRUE);
$page_title = 'Linked Data for ' . $g->get_label($resource_uri, TRUE) . ' | ' . htmlspecialchars($this_host);
$body .= '<p>A description of the resource identified by <a href="' . htmlspecialchars($resource_uri) . '">' . htmlspecialchars($resource_uri) . '</a></p>' . "\n";
$body .= ' <table class="linkeddata" summary="RDF description of the resource identified by ' . htmlspecialchars($resource_uri) . '. Property names are in the first column, values are in the second.">' . "\n";
$body .= ' <tbody>' . "\n";
$properties = $g->get_subject_properties($resource_uri, TRUE);
$priority_properties = array_intersect($ordered_properties, $properties);
$remaining_properties = array_diff($properties, $priority_properties);
sort($remaining_properties);
$properties = array_merge($priority_properties, $remaining_properties);
$class = 'oddrow';
$index = $g->get_index();
foreach ($properties as $p) {
$body .= ' <tr class="' . $class . '">' . "\n";
$body .= ' <th valign="top" class="' . $class . '"><a href="' . htmlspecialchars($p) . '">' . htmlspecialchars($g->get_label($p, TRUE)) . '</a></th>' . "\n";
$body .= ' <td valign="top" class="' . $class . '">';
for ($i = 0; $i < count($index[$resource_uri][$p]); $i++) {
if ($i > 0) {
$body .= ', ';
}
if ($index[$resource_uri][$p][$i]['type'] === 'literal') {
if (array_key_exists('datatype', $index[$resource_uri][$p][$i]) && $index[$resource_uri][$p][$i]['datatype'] == 'http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral') {
$body .= $index[$resource_uri][$p][$i]['value'];
} else {
$body .= htmlspecialchars($index[$resource_uri][$p][$i]['value']);
}
} else {
