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