/**
* Whether this search term has an operator of type MCL_OPERATOR_FILTER
*/
public function isFilter()
{
if (!$this->search_operator) {
return false;
}
$cstf = new ConceptSearchTermFactory();
return $cstf->isFilterOperator($this->search_operator);
}
/**
* Parses the search group into ConceptSearchTermCollection
* and ConceptSearchTerm objects. Returns true if the query contains
* one or more search terms; false otherwise.
*/
public function parse($q)
{
$this->query = $q;
if (!$q) {
return false;
}
/*
* Split into search terms. There are 5 types of terms currently supported:
* text_or_integer
* operator:text_or_integer
* "text in, quotes with separators"
* operator:"text in, quotes with separators"
* Terms can be split by whitespace or commas. Quotes may be single or double.
*
* TODO: Support for functions or lists. e.g. fxn_name(fxn_param)
*/
$regexp = '~(?:(?:([\\w-]+):)?)(?:(?:"([^\\v"]*)")|(?:\'([^\\v\']*)\')|([\\w.-]+|\\*))(?=\\s|,|$)~';
$arr_matches = array();
$result = preg_match_all($regexp, $q, $arr_matches);
// Create ConceptSearchTermCollection objects
$this->cstc_top = new ConceptSearchTermCollection();
// top-level OR cstc
$this->cstc_top->glue = MCL_CONCEPT_SEARCH_GLUE_OR;
$cstc_and = new ConceptSearchTermCollection();
// child AND cstc for text searches
$cstc_and->glue = MCL_CONCEPT_SEARCH_GLUE_AND;
/**
* Create search terms and add to appropriate CSTC.
* Top-level CSTC has 'OR' glue and has one-child 'AND' CSTC for
* text/name/desc search terms.
*/
$cstf = new ConceptSearchTermFactory();
$num_search_terms_created = 0;
foreach ($arr_matches[0] as $str_search_term) {
$arr_cst = $cstf->parse($str_search_term);
foreach (array_keys($arr_cst) as $i) {
$num_search_terms_created++;
if ($arr_cst[$i]->term_type == MCL_SEARCH_TERM_TYPE_TEXT || $arr_cst[$i]->term_type == MCL_SEARCH_TERM_TYPE_CONCEPT_NAME || $arr_cst[$i]->term_type == MCL_SEARCH_TERM_TYPE_CONCEPT_DESCRIPTION) {
$cstc_and->addSearchTerm($arr_cst[$i]);
} else {
$this->cstc_top->addSearchTerm($arr_cst[$i]);
}
}
}
if ($cstc_and->Count()) {
$this->cstc_top->addSearchTermCollection($cstc_and);
}
return (bool) count($num_search_terms_created);
}
