/**
* Creates the Index on the elasticsearch server itself, first dropping if it already
* exists.
*/
public static function create_index()
{
$esclient = PluginSearchElasticsearch::make_client();
$elasticaIndex = $esclient->getIndex(PluginSearchElasticsearch::get_write_indexname());
// Create the index, deleting it first if it already exists
$elasticaIndex->create(array('analysis' => array('analyzer' => array('mahara_analyzer' => array('type' => 'custom', 'tokenizer' => 'pattern', 'filter' => array('standard', 'lowercase', 'stop', 'maharaSnowball'), 'char_filter' => array('maharaHtml'))), 'filter' => array('maharaSnowball' => array('type' => 'snowball', 'language' => 'English')), 'char_filter' => array('maharaHtml' => array('type' => 'html_strip', 'read_ahead' => '1024')))), true);
}
/**
* Get views linked to a particular artefact, applying ACL
* This is used to display the list of views in an artefact result, because it's faster to retrieve the info
* from Elastic search that running the SQL query.
*/
public static function views_by_artefact_acl_filter($views = array())
{
global $USER;
$ret = array();
$elasticaClient = PluginSearchElasticsearch::make_client();
$elasticaIndex = $elasticaClient->getIndex(get_config_plugin('search', 'elasticsearch', 'indexname'));
$elasticaQuery = new \Elastica\Query();
// check user access to the views
$elasticaFilterAnd = new \Elastica\Filter\BoolAnd();
$elasticaFilterType = new \Elastica\Filter\Term(array('_type' => 'view'));
$elasticaFilterAnd->addFilter($elasticaFilterType);
$elasticaFilterIds = new \Elastica\Filter\Terms('id', array_keys($views));
$elasticaFilterAnd->addFilter($elasticaFilterIds);
// Apply ACL filters
$elasticaFilterACL = new ElasticsearchFilterAcl($USER);
$elasticaFilterAnd->addFilter($elasticaFilterACL);
$elasticaFilteredQuery = new \Elastica\Query\Filtered(null, $elasticaFilterAnd);
$elasticaQuery->setQuery($elasticaFilteredQuery);
$elasticaResultSet = $elasticaIndex->search($elasticaQuery);
$elasticaResults = $elasticaResultSet->getResults();
foreach ($elasticaResults as $elasticaResult) {
$data = $elasticaResult->getData();
$ret[$data['id']] = $views[$data['id']];
}
return $ret;
}
