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<?php |
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declare(strict_types=1); |
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namespace MartinGeorgiev\Utils; |
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/** |
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* Util class with helpers for working with PostgreSql data structures. |
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* |
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* @since 0.9 |
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* |
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* @author Martin Georgiev <[email protected]> |
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*/ |
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class DataStructure |
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{ |
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/** |
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* This method supports only single-dimensioned text arrays and |
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* relays on the default escaping strategy in PostgreSql (double quotes). |
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*/ |
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public static function transformPostgresTextArrayToPHPArray(string $postgresArray): array |
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{ |
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$transform = static function (string $textArrayToTransform): array { |
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$indicatesMultipleDimensions = \mb_strpos($textArrayToTransform, '},{') !== false |
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|| \mb_strpos($textArrayToTransform, '{{') === 0; |
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if ($indicatesMultipleDimensions) { |
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throw new \InvalidArgumentException('Only single-dimensioned arrays are supported'); |
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} |
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$phpArray = \str_getcsv(\trim($textArrayToTransform, '{}'), escape: '\\'); |
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foreach ($phpArray as $i => $text) { |
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if ($text === null) { |
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unset($phpArray[$i]); |
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break; |
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} |
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if (!\is_string($text)) { |
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$exceptionMessage = 'Unsupported data type encountered. Expected null, integer, float or string value. Instead it is "%s".'; |
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throw new \InvalidArgumentException(\sprintf($exceptionMessage, \gettype($text))); |
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} |
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$phpArray[$i] = \stripslashes(\str_replace('\"', '"', $text)); |
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} |
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return $phpArray; |
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}; |
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return $transform($postgresArray); |
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} |
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/** |
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* This method supports only single-dimensioned PHP arrays. |
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* This method relays on the default escaping strategy in PostgreSql (double quotes). |
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* |
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* @see https://stackoverflow.com/a/5632171/3425372 Kudos to jmz for the inspiration |
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*/ |
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public static function transformPHPArrayToPostgresTextArray(array $phpArray): string |
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{ |
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$transform = static function (array $phpArrayToTransform): string { |
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$result = []; |
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foreach ($phpArrayToTransform as $text) { |
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if (\is_array($text)) { |
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throw new \InvalidArgumentException('Only single-dimensioned arrays are supported'); |
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} |
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$escapedText = \is_numeric($text) || \ctype_digit($text) ? $text : \sprintf('"%s"', \addcslashes($text, '"\\')); |
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$result[] = $escapedText; |
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} |
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return '{'.\implode(',', $result).'}'; |
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}; |
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return $transform($phpArray); |
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} |
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} |
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martin-georgiev /
postgresql-for-doctrine
