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<?php |
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declare(strict_types=1); |
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namespace Koriym\QueryLocator; |
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use Koriym\QueryLocator\Exception\CountQueryException; |
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use Koriym\QueryLocator\Exception\QueryFileNotFoundException; |
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use Koriym\QueryLocator\Exception\ReadOnlyException; |
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use function is_string; |
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final class QueryLocator implements QueryLocatorInterface |
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{ |
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/** |
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* @var string |
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*/ |
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private $sqlDir; |
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public function __construct(string $sqlDir) |
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{ |
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$this->sqlDir = $sqlDir; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get($queryName) |
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{ |
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$sqlFile = sprintf( |
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'%s/%s.sql', |
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$this->sqlDir, |
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$queryName |
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); |
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return trim($this->getFileContents($sqlFile)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getCountQuery($queryName) |
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{ |
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return $this->rewriteCountQuery($this->get($queryName)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetExists($offset) |
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{ |
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return (bool) $this->get($offset); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->get($offset); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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throw new ReadOnlyException('not supported'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetUnset($offset) |
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{ |
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throw new ReadOnlyException('not supported'); |
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} |
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/** |
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* Return count query |
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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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1 |
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*/ |
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private function rewriteCountQuery(string $sql) : string |
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{ |
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if (preg_match('/^\s*SELECT\s+\bDISTINCT\b/is', $sql) || preg_match('/\s+GROUP\s+BY\s+/is', $sql)) { |
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throw new CountQueryException($sql); |
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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, $sql)) { |
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throw new CountQueryException($sql); |
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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, $sql)) { |
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throw new CountQueryException($sql); |
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} |
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$queryCount = preg_replace('/(?:.*)\bFROM\b\s+/Uims', 'SELECT COUNT(*) FROM ', $sql, 1); |
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if (! is_string($queryCount)) { |
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throw new CountQueryException($sql); |
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} |
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list($queryCount) = preg_split('/\s+ORDER\s+BY\s+/is', $queryCount); |
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if (! is_string($queryCount)) { |
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throw new CountQueryException($sql); |
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} |
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list($queryCount) = preg_split('/\bLIMIT\b/is', $queryCount); |
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if (! is_string($queryCount)) { |
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throw new CountQueryException($sql); |
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} |
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return trim($queryCount); |
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} |
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private function getFileContents(string $file) : string |
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{ |
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if (! file_exists($file)) { |
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throw new QueryFileNotFoundException($file); |
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} |
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$contents = file_get_contents($file); |
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if (! $contents) { |
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throw new QueryFileNotFoundException($file); |
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} |
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return $contents; |
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} |
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} |
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koriym /
Koriym.QueryLocator
