/**
* Clear the old associated graphs with the given EML sequence based on the graph name.
*/
private function deleteOldGraphs()
{
$graph_name = $this->graph->graph_name;
$this->log("Before attaching the new graph, detaching and removing the old one, and possible zombie graphs");
// List of graph names we have to delete in the triple store
$graphs = $this->fetchGraphs($graph_name);
if ($graphs) {
foreach ($graphs as $graph_name) {
if ($graph_name != $this->graph->graph_id) {
$query = "CLEAR GRAPH <{$graph_name}>";
$result = $this->performQuery($query);
// If all went ok, delete the graph entry
if ($result !== false) {
$this->log("The old version of the graph with id {$graph_name} has been deleted in the triple store.");
} else {
$this->log("The old version of the graph with id {$graph_name} was not deleted in the triple store.", "error");
}
}
}
}
// Delete the graph objects in our back-end
$query_graph_name = "'" . str_replace('/', '\\/', $this->graph->graph_name) . "'";
$graphs = \Graph::whereRaw("graph_name like {$query_graph_name}")->get();
foreach ($graphs as $graph) {
if ($graph->graph_id != $this->graph->graph_id) {
$graph->delete();
$this->log("The old version of the graph with id {$graph->graph_id} has been deleted in the back-end.");
}
}
$this->log("--------------------------------------------------------------------------------------------------");
$this->log("The new graph is identified by " . $this->graph->graph_id);
}
