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<?php
/**
* Contains Boolean search from the search form.
*/
class FreshRSS_BooleanSearch {
private $raw_input = '';
private $searches = array();
public function __construct($input) {
$input = trim($input);
if ($input == '') {
return;
}
$this->raw_input = $input;
$input = preg_replace('/:"(.*?)"/', ':"\1"', $input);
$splits = preg_split('/\b(OR)\b/i', $input, -1, PREG_SPLIT_DELIM_CAPTURE);
$segment = '';
$ns = count($splits);
for ($i = 0; $i < $ns; $i++) {
$segment = $segment . $splits[$i];
if (trim($segment) == '' || strcasecmp($segment, 'OR') === 0) {
$segment = '';
} else {
$quotes = substr_count($segment, '"') + substr_count($segment, '"');
if ($quotes % 2 === 0) {
$segment = trim($segment);
if ($segment != '') {
$this->searches[] = new FreshRSS_Search($segment);
}
$segment = '';
}
}
}
$segment = trim($segment);
if ($segment != '') {
$this->searches[] = new FreshRSS_Search($segment);
}
}
public function searches() {
return $this->searches;
}
public function add($search) {
if ($search instanceof FreshRSS_Search) {
$this->searches[] = $search;
return $search;
}
return null;
}
public function __toString() {
return $this->getRawInput();
}
public function getRawInput() {
return $this->raw_input;
}
}
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