$value) {
$results = array_merge($results, self::searchHtml($key, $query));
if (is_array($value)) {
$results = array_merge($results, self::searchArray($value, $query));
} else {
$results = array_merge($results, self::searchHtml(strval($value), $query));
}
}
return $results;
}
public abstract function doSearch(Context $context, SearchQuery $query): array;
public static function searchHtml(string $document, SearchQuery $query): array {
if (stringContains($document, "<")) {
$converter = new Html2Text($document);
$text = trim($converter->getText());
} else {
$text = $document;
}
$text = trim(preg_replace('!\s+!', ' ', $text));
return self::searchText($text, $query);
}
public static function searchText(string $content, SearchQuery $query): array {
$offset = 0;
$searchTerm = $query->getQuery();
$stringLength = strlen($searchTerm);
$contentLength = strlen($content);
$lastPos = 0;
$results = [];
do {
$pos = stripos($content, $searchTerm, $offset);
if ($pos !== false) {
if ($lastPos === 0 || $pos > $lastPos + 192 + $stringLength) {
$extract = self::viewExtract($content, $pos, $searchTerm);
$results[] = array(
"text" => $extract,
"pos" => $pos,
"lastPos" => $lastPos
);
$lastPos = $pos;
}
$offset = $pos + $stringLength;
}
} while ($pos !== false && $offset < $contentLength);
return $results;
}
private static function viewExtract(string $content, int $pos, $string): array|string|null {
$length = strlen($string);
$start = max(0, $pos - 32);
$end = min(strlen($content) - 1, $pos + $length + 192);
if ($start > 0) {
if (!ctype_space($content[$start - 1]) &&
!ctype_space($content[$start])) {
$start = $start + strpos(substr($content, $start, $end), ' ');
}
}
if ($end < strlen($content) - 1) {
if (!ctype_space($content[$end + 1]) &&
!ctype_space($content[$end])) {
$end = $start + strrpos(substr($content, $start, $end - $start), ' ');
}
}
$extract = trim(substr($content, $start, $end - $start + 1));
if ($start > 0) $extract = ".. " . $extract;
if ($end < strlen($content) - 1) $extract .= " ..";
return preg_replace("/" . preg_quote($string) . "(?=[^>]*(<|$))/i", "\$0", $extract);
}
}