public static function searchFullText($words, $hasDiacritics)
{
$intersection = null;
$matchingLexems = array();
foreach ($words as $word) {
$lexems = Lexem::searchInflectedForms($word, $hasDiacritics);
$lexemIds = array();
foreach ($lexems as $lexem) {
$lexemIds[] = $lexem->id;
}
$matchingLexems[] = $lexemIds;
}
foreach ($words as $i => $word) {
// Load all the definitions for any possible lexem for this word.
$lexemIds = $matchingLexems[$i];
$defIds = FullTextIndex::loadDefinitionIdsForLexems($lexemIds);
DebugInfo::resetClock();
$intersection = $intersection === null ? $defIds : util_intersectArrays($intersection, $defIds);
DebugInfo::stopClock("Intersected with lexems for {$word}");
}
if ($intersection === null) {
// This can happen when the query is all stopwords
$intersection = array();
}
$shortestInvervals = array();
DebugInfo::resetClock();
// Now compute a score for every definition
foreach ($intersection as $defId) {
// Compute the position matrix (for every word, load all the matching
// positions)
$p = array();
foreach ($matchingLexems as $lexemIds) {
$p[] = FullTextIndex::loadPositionsByLexemIdsDefinitionId($lexemIds, $defId);
}
$shortestIntervals[] = util_findSnippet($p);
}
if ($intersection) {
array_multisort($shortestIntervals, $intersection);
}
DebugInfo::stopClock("Computed score for every definition");
return $intersection;
}
