/**
* Разбор фильтров
* OR(AND(filter:field:operator:value;filter2:field:oerpator:value);(...)), etc.
*
* @param string $filter_string строка со всеми фильтрами
* @return mixed результат разбора фильтров
*/
protected function getFilters($filter_string)
{
$this->debug->debug("getFilters: " . $this->debug->dumpData($filter_string), 'getFilter', 1);
// the filter parameter tells us, which filters can be used in this query
$filter_string = trim($filter_string, ' ;');
if (!$filter_string) {
return;
}
$output = array('join' => '', 'where' => '');
$logic_op_found = false;
$joins = $wheres = array();
foreach ($this->_logic_ops as $op => $sql) {
if (strpos($filter_string, $op) === 0) {
$logic_op_found = true;
$subfilters = mb_substr($filter_string, strlen($op) + 1, mb_strlen($filter_string, "UTF-8"), "UTF-8");
$subfilters = $this->smartSplit($subfilters);
foreach ($subfilters as $subfilter) {
$subfilter = $this->getFilters(trim($subfilter));
if (!$subfilter) {
continue;
}
if ($subfilter['join']) {
$joins[] = $subfilter['join'];
}
if ($subfilter['where']) {
$wheres[] = $subfilter['where'];
}
}
$output['join'] = !empty($joins) ? implode(' ', $joins) : '';
$output['where'] = !empty($wheres) ? '(' . implode($sql, $wheres) . ')' : '';
}
}
if (!$logic_op_found) {
$filter = $this->loadFilter($filter_string);
if (!$filter) {
$this->debug->warning('Error while loading DocLister filter "' . $this->debug->dumpData($filter_string) . '": check syntax!');
$output = false;
} else {
$output['join'] = $filter->get_join();
$output['where'] = $filter->get_where();
}
}
$this->debug->debug('getFilter');
return $output;
}
