/**
* Возвращает основу слова
*
* @param string $word
*
* @return string
*/
public function stem_word($word)
{
$word = strtr(mb_strtolower($word), array('ё' => 'е'));
if ($this->use_cache && isset($this->cache[$word])) {
return $this->cache[$word];
}
list($str, $start, $rv) = Core_Regexps::match_with_results(self::RVRE, $word);
if (!$rv) {
return $word;
}
// step 1
if (!Core_Regexps::replace_ref(self::PERFECTIVEGROUND, '', $rv)) {
$rv = preg_replace(self::REFLEXIVE, '', $rv);
if (Core_Regexps::replace_ref(self::ADJECTIVE, '', $rv)) {
$rv = preg_replace(self::PARTICIPLE, '', $rv);
} else {
if (!Core_Regexps::replace_ref(self::VERB, '', $rv)) {
$rv = preg_replace(self::NOUN, '', $rv);
}
}
}
// step 2
$rv = preg_replace('{и$}', '', $rv);
// step 3
if (preg_match(self::DERIVATIONAL, $rv)) {
$rv = preg_replace('{ость?$}', '', $rv);
}
// step 4
if (!Core_Regexps::replace_ref('{ь$}', '', $rv)) {
$rv = preg_replace(array('{ейше?}', '{нн$}'), array('', 'н'), $rv);
}
return $this->use_cache ? $this->cache[$word] = $start . $rv : $start . $rv;
}
/**
* @dataProvider provider_replace_ref
*/
public function test_replace_ref_count($search_str, $replace_str, $subject, $count_replaced, $expected)
{
$this->assertEquals(Core_Regexps::replace_ref($search_str, $replace_str, $subject), $count_replaced);
$this->assertEquals($subject, $expected);
}
