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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 Pagerfanta\Adapter\AdapterInterface; |
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use PDO; |
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use function count; |
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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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class ExtendedPdoAdapter implements AdapterInterface |
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{ |
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/** @var ExtendedPdoInterface */ |
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private $pdo; |
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/** @var string */ |
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private $sql; |
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/** @var array<mixed> */ |
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private $params; |
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/** |
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* @param array<mixed> $params |
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*/ |
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public function __construct(ExtendedPdoInterface $pdo, string $sql, array $params) |
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{ |
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$this->pdo = $pdo; |
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$this->sql = $sql; |
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$this->params = $params; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getNbResults() |
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{ |
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// be smart and try to guess the total number of records |
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$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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return ! $result ? 0 : count($result); |
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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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return ! $count ? 0 : (int) $count; |
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} |
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$count = $this->pdo->fetchValue($countQuery); |
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return ! $count ? 0 : (int) $count; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @return array<array> |
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*/ |
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public function getSlice($offset, $length) |
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{ |
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$sql = $this->sql . $this->getLimitClause($offset, $length); |
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$result = $this->pdo->perform($sql, $this->params)->fetchAll(PDO::FETCH_ASSOC); |
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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 ', $query, 1); |
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[$queryCount] = preg_split('/\s+ORDER\s+BY\s+/is', (string) $queryCount); |
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[$queryCount] = preg_split('/\bLIMIT\b/is', (string) $queryCount); |
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return trim((string) $queryCount); |
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} |
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} |
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Ray-Di /
Ray.AuraSqlModule
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.