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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Db\Pgsql; |
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use JsonException; |
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use function in_array; |
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use function json_decode; |
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use function strlen; |
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use const JSON_THROW_ON_ERROR; |
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/** |
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* The class converts PostgresSQL array representation to PHP array. |
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*/ |
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final class ArrayParser |
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{ |
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/** |
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* @var string Character used in array |
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*/ |
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private string $delimiter = ','; |
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/** |
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* @var string|null cast array values to php type |
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*/ |
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private ?string $typeCast = null; |
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/** |
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* Convert array from PostgresSQL to PHP |
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* |
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* @param string|null $value string to be converted |
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* |
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* @return array|null |
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*/ |
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public function parse(?string $value): ?array |
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{ |
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if ($value === null) { |
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return null; |
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} |
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if ($value === '{}') { |
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return []; |
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} |
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return $this->parseArray($value); |
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} |
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public function withTypeCast(?string $typeCast): self |
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{ |
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$new = clone $this; |
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$new->typeCast = $typeCast; |
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return $new; |
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} |
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/** |
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* Pares PgSQL array encoded in string. |
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* |
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* @param string $value |
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* @param int $i parse starting position. |
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* |
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* @return array |
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* @throws JsonException |
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*/ |
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private function parseArray(string $value, int &$i = 0): array |
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{ |
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$result = []; |
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$len = strlen($value); |
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for (++$i; $i < $len; ++$i) { |
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switch ($value[$i]) { |
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case '{': |
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$result[] = $this->parseArray($value, $i); |
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break; |
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case '}': |
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break 2; |
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case $this->delimiter: |
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/** `{}` case */ |
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if (empty($result)) { |
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$result[] = null; |
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} |
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/** `{,}` case */ |
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if (in_array($value[$i + 1], [$this->delimiter, '}'], true)) { |
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$result[] = null; |
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} |
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break; |
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default: |
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/** @var mixed */ |
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$result[] = $this->parseString($value, $i); |
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} |
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} |
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return $result; |
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} |
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/** |
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* Parses PgSQL encoded string. |
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* |
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* @param string $value |
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* @param int $i parse starting position. |
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* |
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* @return mixed |
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* @throws JsonException |
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*/ |
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private function parseString(string $value, int &$i): mixed |
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{ |
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$isQuoted = $value[$i] === '"'; |
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$stringEndChars = $isQuoted ? ['"'] : [$this->delimiter, '}']; |
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$result = ''; |
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$len = strlen($value); |
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for ($i += $isQuoted ? 1 : 0; $i < $len; ++$i) { |
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if (in_array($value[$i], ['\\', '"'], true) && in_array($value[$i + 1], [$value[$i], '"'], true)) { |
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++$i; |
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} elseif (in_array($value[$i], $stringEndChars, true)) { |
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break; |
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} |
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$result .= $value[$i]; |
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} |
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$i -= $isQuoted ? 0 : 1; |
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if (!$isQuoted && $result === 'NULL') { |
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return null; |
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} |
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return match ($this->typeCast) { |
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1 |
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Schema::PHP_TYPE_INTEGER => (int) $result, |
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Schema::PHP_TYPE_DOUBLE => (float) $result, |
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1 |
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Schema::PHP_TYPE_ARRAY => json_decode($result, true, 512, JSON_THROW_ON_ERROR), |
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Schema::PHP_TYPE_BOOLEAN => ColumnSchema::castBooleanValue($result), |
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default => $result, |
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}; |
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} |
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} |
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yiisoft /
db-pgsql
