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<?php |
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declare(strict_types=1); |
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namespace Ray\AuraSqlModule\Pagerfanta; |
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use Aura\Sql\ExtendedPdoInterface; |
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use Override; |
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use Pagerfanta\Adapter\AdapterInterface; |
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use function assert; |
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use function count; |
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use function is_array; |
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use function is_int; |
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use function preg_match; |
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use function preg_replace; |
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use function preg_split; |
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use function strpos; |
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use function strtolower; |
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use function trim; |
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use const PHP_EOL; |
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/** |
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* @template T |
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* @implements AdapterInterface<T> |
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*/ |
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final class ExtendedPdoAdapter implements AdapterInterface |
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{ |
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private readonly FetcherInterface $fetcher; |
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/** |
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* @param array<mixed> $params |
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* |
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* @psalm-taint-sink sql $sql |
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*/ |
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public function __construct( |
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private readonly ExtendedPdoInterface $pdo, |
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private readonly string $sql, |
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private readonly array $params, |
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?FetcherInterface $fetcher = null |
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) { |
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$this->fetcher = $fetcher ?? new FetchAssoc($this->pdo); |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @SuppressWarnings(PHPMD.GotoStatement) // @phpstan-ignore-line |
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*/ |
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#[Override] |
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public function getNbResults(): int |
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{ |
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// be smart and try to guess the total number of records |
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$countQuery = $this->rewriteCountQuery($this->sql); |
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if (! $countQuery) { |
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// GROUP BY => fetch the whole result set and count the rows returned |
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$result = $this->pdo->perform($this->sql, $this->params)->fetchAll(); |
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$count = ! $result ? 0 : count($result); |
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goto ret; |
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} |
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if ($this->params) { |
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$count = $this->pdo->fetchValue($countQuery, $this->params); |
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goto ret; |
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} |
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$count = $this->pdo->fetchValue($countQuery); |
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ret: |
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/** @var string $count */ |
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$nbResult = ! $count ? 0 : (int) $count; |
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assert($nbResult >= 0); |
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return $nbResult; |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @param int $offset |
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* @param int $length |
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* |
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* @return array<mixed> |
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*/ |
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#[Override] |
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public function getSlice(int $offset, int $length): iterable |
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{ |
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$sql = $this->sql . $this->getLimitClause($offset, $length); |
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$result = ($this->fetcher)($sql, $this->params); |
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return ! $result ? [] : $result; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getLimitClause(int $offset, int $length): string |
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{ |
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if ($offset && $length) { |
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return PHP_EOL . "LIMIT {$length} OFFSET {$offset}"; |
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} |
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if ($length) { |
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return PHP_EOL . "LIMIT {$length}"; |
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} |
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return ''; |
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} |
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/** |
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* Return count query |
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* |
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* @param string $query |
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* |
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* @return string |
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* |
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* @see https://github.com/pear/Pager/blob/master/examples/Pager_Wrapper.php |
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* Taken from pear/pager and modified. |
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* tested at https://github.com/pear/Pager/blob/80c0e31c8b94f913cfbdeccbe83b63822f42a2f8/tests/pager_wrapper_test.php#L19 |
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* @codeCoverageIgnore |
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*/ |
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public function rewriteCountQuery($query) |
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{ |
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if (is_int(strpos(strtolower($query), 'union'))) { |
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return ''; |
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} |
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if (preg_match('/^\s*SELECT\s+\bDISTINCT\b/is', $query) || preg_match('/\s+GROUP\s+BY\s+/is', $query)) { |
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return ''; |
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} |
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$openParenthesis = '(?:\()'; |
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$closeParenthesis = '(?:\))'; |
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$subQueryInSelect = $openParenthesis . '.*\bFROM\b.*' . $closeParenthesis; |
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$pattern = '/(?:.*' . $subQueryInSelect . '.*)\bFROM\b\s+/Uims'; |
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if (preg_match($pattern, $query)) { |
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return ''; |
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} |
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$subQueryWithLimitOrder = $openParenthesis . '.*\b(LIMIT|ORDER)\b.*' . $closeParenthesis; |
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$pattern = '/.*\bFROM\b.*(?:.*' . $subQueryWithLimitOrder . '.*).*/Uims'; |
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if (preg_match($pattern, $query)) { |
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return ''; |
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} |
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$queryCount = preg_replace('/(?:.*)\bFROM\b\s+/Uims', 'SELECT COUNT(*) FROM ', $query, 1); |
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$split = preg_split('/\s+ORDER\s+BY\s+/is', (string) $queryCount); |
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assert(is_array($split), 'preg_split() should return an array'); |
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[$queryCount] = $split; |
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$split2 = preg_split('/\bLIMIT\b/is', (string) $queryCount); |
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assert(is_array($split2), 'preg_split() should return an array'); |
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[$queryCount2] = $split2; |
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return trim((string) $queryCount2); |
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} |
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} |
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Ray-Di /
Ray.AuraSqlModule
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