public static function truncateHighLight($text, $limit)
{
preg_match('/' . preg_quote(ElasticSearchConfig::getHighLigthPre()) . '/', $text, $matches, PREG_OFFSET_CAPTURE);
if ($matches) {
$posPreTag = $matches[0][1];
//If pos if at the beginning it is not necessary to truncate the left part
if ($posPreTag > $limit * 0.75) {
$pos = strpos($text, " ", $posPreTag - $limit * 0.3);
$text = substr($text, $pos);
$text = '... ' . $text;
}
return JHtmlString::truncate($text, $limit + 4, true, true);
}
return $text;
}
/**
* Main method to make a search
*/
public function search()
{
$this->getSearchFields();
$word = JRequest::getString('searchword', null, 'get');
$offset = JRequest::getInt('start', 0, 'get');
$limit = JRequest::getInt('limit', 10, 'get');
if ($limit == 0) {
// no limit
$limit = 10000;
}
$this->getSearchAreas();
$elasticaQueryString = new \Elastica\Query\QueryString();
// Log search word only on the first page
if ($offset == 0) {
SearchHelper::logSearch($word);
}
// Convert accents
$word = htmlentities($word, ENT_NOQUOTES, 'utf-8');
$word = preg_replace('#\\&([A-za-z])(?:uml|circ|tilde|acute|grave|cedil|ring)\\;#', '\\1', $word);
$word = preg_replace('#\\&([A-za-z]{2})(?:lig)\\;#', '\\1', $word);
$word = preg_replace('#\\&[^;]+\\;#', '', $word);
// Check if there are quotes ( for exact search )
$exactSearch = false;
if (strlen($word) > 1 && $word[0] == '"' && $word[strlen($word) - 1] == '"') {
$exactSearch = true;
$word = substr($word, 1, strlen($word) - 2);
// Remove external "
}
$word = Elastica\Util::replaceBooleanWordsAndEscapeTerm($word);
// Escape ElasticSearch specials char
if ($exactSearch) {
$word = '"' . $word . '"';
}
if ($word == "") {
$word = "*";
}
$elasticaQueryString->setQuery($word);
//Create the actual search object with some data.
$elasticaQuery = new Elastica\Query();
$elasticaQuery->setQuery($elasticaQueryString);
if (ElasticSearchConfig::getHighLigthEnable()) {
$fields = $this->getHighlightFields();
$hlfields = array();
foreach ($fields as $field) {
foreach ($field as $highlight) {
$hlfields[] = array($highlight => array('fragment_size' => 1000, 'number_of_fragments' => 1));
}
}
$highlightFields = array('pre_tags' => array(ElasticSearchConfig::getHighLigthPre()), 'post_tags' => array(ElasticSearchConfig::getHighLigthPost()), "order" => "score", 'fields' => $hlfields);
$elasticaQuery->setHighlight($highlightFields);
}
// Set offset and limit for pagination
$elasticaQuery->setFrom($offset);
$elasticaQuery->setLimit($limit);
//Create a filter for _type
$elasticaFilterype = $this->createFilterType($this->areas);
// Add filter to the search object.
$elasticaQuery->setFilter($elasticaFilterype);
//Search on the index.
$elasticaResultSet = $this->elasticaIndex->search($elasticaQuery);
$this->results = $elasticaResultSet->getResults();
$this->totalHits = $elasticaResultSet->getTotalHits();
}
