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;
}
function test_diff_to_ensure_type_insensitive_comparison()
{
$_1 = array('#x' => array('#lcn' => array(array('value' => '1521278'))));
$_2 = array('#x' => array('#lcn' => array(array('value' => '00001521278'))));
$actual = SimpleGraph::diff($_1, $_2);
$this->assertEquals($_1, $actual);
}
function __init()
{
$csIndex = array();
$CSNS = 'http://purl.org/vocab/changeset/schema#';
// Get the triples to be added
if (empty($this->before)) {
$additions = $this->after;
} else {
$additions = SimpleGraph::diff($this->after, $this->before);
}
//Get the triples to be removed
if (empty($this->after)) {
$removals = $this->before;
} else {
$removals = SimpleGraph::diff($this->before, $this->after);
}
// $removals = !empty($this->after)? SimpleGraph::diff($this->before, $this->after) : $this->before;
//remove etag triples
foreach (array('removals' => $removals, 'additions' => $additions) as $name => $graph) {
foreach ($graph as $uri => $properties) {
if (isset($properties["http://schemas.talis.com/2005/dir/schema#etag"])) {
unset(${$name}[$uri]["http://schemas.talis.com/2005/dir/schema#etag"]);
if (count(${$name}[$uri]) == 0) {
unset(${$name}[$uri]);
}
}
}
}
// print_r(array_keys($additions));
// print_r(array_keys($removals));
// print_r(array_merge(array_keys($additions), array_keys($removals)));
// Get an array of all the subject uris
$subjectIndex = !empty($this->a['subjectOfChange']) ? array($this->a['subjectOfChange']) : array_unique(array_merge(array_keys($additions), array_keys($removals)));
// print_r($subjectIndex);
// Get the metadata for all the changesets
$date = !empty($this->a['createdDate']) ? $this->a['createdDate'] : date(DATE_ATOM);
$creator = !empty($this->a['creatorName']) ? $this->a['creatorName'] : 'Moriarty ChangeSet Builder';
$reason = !empty($this->a['changeReason']) ? $this->a['changeReason'] : 'Change using Moriarty ChangeSet Builder';
$csCount = 0;
foreach ($subjectIndex as $subjectOfChange) {
$csID = '_:cs' . $csCount;
$csIndex[$subjectOfChange] = $csID;
$this->addT($csID, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $CSNS . 'ChangeSet', 'uri');
$subjectType = strpos($subjectOfChange, '_:') === 0 ? 'bnode' : 'uri';
$this->addT($csID, $CSNS . 'subjectOfChange', $subjectOfChange, $subjectType);
$this->addT($csID, $CSNS . 'createdDate', $date, 'literal');
$this->addT($csID, $CSNS . 'creatorName', $creator, 'literal');
$this->addT($csID, $CSNS . 'changeReason', $reason, 'literal');
/* add extra user-given properties to each changeset*/
if (!empty($this->a['properties'])) {
foreach ($this->a['properties'] as $p => $objs) {
$this->addT($csID, $p, $objs);
}
}
$csCount++;
}
/*iterate through the triples to be added,
reifying them,
and linking to the Statements from the appropriate changeset
*/
$reifiedAdditions = SimpleGraph::reify($additions, 'Add');
if (!empty($reifiedAdditions)) {
foreach ($reifiedAdditions as $nodeID => $props) {
$subject = $props['http://www.w3.org/1999/02/22-rdf-syntax-ns#subject'][0]['value'];
if (in_array($subject, $subjectIndex)) {
$csID = $csIndex[$subject];
$this->addT($csID, $CSNS . 'addition', $nodeID, 'bnode');
}
// if dc:source is given in the instantiating arguments, add it to the statement as provenance
if (isset($this->a['http://purl.org/dc/terms/source'])) {
$this->addT($nodeID, 'http://purl.org/dc/terms/source', $this->a['http://purl.org/dc/terms/source'], 'uri');
}
}
}
/*iterate through the triples to be removed,
reifying them,
and linking to the Statements from the appropriate changeset
*/
$reifiedRemovals = SimpleGraph::reify($removals, 'Remove');
foreach ($reifiedRemovals as $nodeID => $props) {
$subject = $props['http://www.w3.org/1999/02/22-rdf-syntax-ns#subject'][0]['value'];
if (in_array($subject, $subjectIndex)) {
$csID = $csIndex[$subject];
$this->addT($csID, $CSNS . 'removal', $nodeID, 'bnode');
}
}
// foreach($this->_index as $uri => $props){
// if(
// !isset($props[$CSNS.'removal'])
// AND
// !isset($props[$CSNS.'addition'])
// ){
// unset($this->_index[$uri]);
// }
//
// }
$this->_index = SimpleGraph::merge($this->_index, $reifiedAdditions, $reifiedRemovals);
}
