public static function searchNGram($cuv)
{
$leng = mb_strlen($cuv);
$hash = NGram::searchLexemIds($cuv);
if (empty($hash)) {
return array();
}
arsort($hash);
$max = current($hash);
$lexIds = array_keys($hash, $max);
$results = array();
foreach ($lexIds as $id) {
$lexem = Model::factory('Lexem')->where('id', $id)->where_gte('charLength', $leng - self::$LENGTH_DIF)->where_lte('charLength', $leng + self::$LENGTH_DIF)->find_one();
if ($lexem) {
$results[] = $lexem;
if (count($results) == self::$MAX_RESULTS) {
break;
}
}
}
// Sort the lexems by their Levenshtein distance from $cuv
$distances = array();
foreach ($results as $lexem) {
$distances[] = Levenshtein::dist($cuv, $lexem->formNoAccent);
}
array_multisort($distances, $results);
return $results;
}
$log->save();
}
$count = Model::factory('DefinitionSimple')->count();
$chosenDef = rand(0, $count - 1);
$answer = rand(1, 4);
$maindef = Model::factory('DefinitionSimple')->limit(1)->offset($chosenDef)->find_one();
$word = getWordForDefitionId($maindef->definitionId);
$options = array();
$options[$answer] = array();
$options[$answer]['term'] = getWordForDefitionId($maindef->definitionId);
$options[$answer]['text'] = $maindef->getDisplayValue();
$used[$maindef->definitionId] = 1;
$closestLexemsDefinitionsCount = null;
$closestLexemsDefinitions = null;
if ($difficulty > 1) {
$nearLexemIds = NGram::searchLexemIds($word);
arsort($nearLexemIds);
$lexemPoolSize = 48 / $difficulty;
$closestLexemIds = array_slice($nearLexemIds, 0, $lexemPoolSize, true);
$closestLexemIds = array_keys($closestLexemIds);
$closestLexemsDefinitions = getSimpleDefinitionsForLexemIds($closestLexemIds);
$closestLexemsDefinitionsCount = count($closestLexemsDefinitions);
//if there are no close lexem definitions to choose from
//then use easier difficulty
if ($closestLexemsDefinitionsCount == 0) {
$difficulty = 1;
}
}
for ($i = 1; $i <= 4; $i++) {
$def = null;
if ($i != $answer) {
