/**
* 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 $return;
}
}
function apply_changes($storeName, $resourceUri, $before, $after)
{
$args = array('subjectOfChange' => $resourceUri, 'before' => $before->get_index(), 'after' => $after->get_index(), 'creatorName' => 'RDF Editor', 'changeReason' => 'user edit');
$cs = new ChangeSet($args);
if ($cs->has_changes()) {
$store = getStore($storeName);
$cs_response = $store->get_metabox()->apply_changeset_rdfxml($cs->to_rdfxml());
if (!$cs_response->is_success()) {
echo 'Failed to apply changeset : <br/><pre>' . $cs_response->to_string() . '</pre>';
return false;
}
} else {
echo 'No changes to apply';
return false;
}
return true;
}
function test_different_etags_dont_cause_a_changeset()
{
$before = '
<rdf:RDF xmlns="http://example.com/foo#" xmlns:dir="http://schemas.talis.com/2005/dir/schema#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about="http://example.com/subject/one">
<dir:etag>"83a10a68-5d8a-47f6-bfbe-0dbba55794d4"</dir:etag>
</rdf:Description>
</rdf:RDF>';
$after = '
<rdf:RDF xmlns="http://example.com/foo#" xmlns:dir="http://schemas.talis.com/2005/dir/schema#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about="http://example.com/subject/one">
</rdf:Description>
</rdf:RDF>';
$changeset = new ChangeSet(array('before' => $before, 'after' => $after, 'changeReason' => 'foo reason', 'creatorName' => 'fooUser'));
$changesets = $changeset->get_subjects_of_type('http://purl.org/vocab/changeset/schema#ChangeSet');
$this->assertEquals(0, count($changesets), 'There should be no changesets produced');
}
