/**
* Recursive helper for _getMergedArray.
*/
function &_getMergedKeywordResults(&$conference, &$keyword, $type, $publishedFrom, $publishedTo, $resultsPerKeyword, $resultCacheHours)
{
$mergedResults = null;
if (isset($keyword['type'])) {
$type = $keyword['type'];
}
foreach ($keyword['+'] as $phrase) {
$results =& PaperSearch::_getMergedPhraseResults($conference, $phrase, $type, $publishedFrom, $publishedTo, $resultsPerKeyword, $resultCacheHours);
if ($mergedResults == null) {
$mergedResults = $results;
} else {
foreach ($mergedResults as $paperId => $count) {
if (isset($results[$paperId])) {
$mergedResults[$paperId] += $results[$paperId];
} else {
unset($mergedResults[$paperId]);
}
}
}
}
if ($mergedResults == null) {
$mergedResults = array();
}
if (!empty($mergedResults) || empty($keyword['+'])) {
foreach ($keyword[''] as $phrase) {
$results =& PaperSearch::_getMergedPhraseResults($conference, $phrase, $type, $publishedFrom, $publishedTo, $resultsPerKeyword, $resultCacheHours);
foreach ($results as $paperId => $count) {
if (isset($mergedResults[$paperId])) {
$mergedResults[$paperId] += $count;
} else {
if (empty($keyword['+'])) {
$mergedResults[$paperId] = $count;
}
}
}
}
foreach ($keyword['-'] as $phrase) {
$results =& PaperSearch::_getMergedPhraseResults($conference, $phrase, $type, $publishedFrom, $publishedTo, $resultsPerKeyword, $resultCacheHours);
foreach ($results as $paperId => $count) {
if (isset($mergedResults[$paperId])) {
unset($mergedResults[$paperId]);
}
}
}
}
return $mergedResults;
}