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<?php |
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/** |
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* Sandro Keil (https://sandro-keil.de) |
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* |
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* @link http://github.com/sandrokeil/arangodb-php-client for the canonical source repository |
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* @copyright Copyright (c) 2018-2019 Sandro Keil |
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* @license http://github.com/sandrokeil/arangodb-php-client/blob/master/LICENSE.md New BSD License |
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*/ |
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namespace ArangoDb\Http; |
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use ArangoDb\Exception\RuntimeException; |
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use ArangoDb\Util\Json; |
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use Psr\Http\Message\StreamInterface; |
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final class JsonStream implements StreamInterface |
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{ |
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/** |
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* Original data |
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* |
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* @var string|array |
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*/ |
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private $data; |
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/** |
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* Buffered json data if needed |
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* |
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* @var string|null |
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*/ |
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private $buffer; |
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/** |
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* @var int |
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*/ |
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private $size; |
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/** |
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* @param string|array $data |
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*/ |
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public function __construct($data) |
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{ |
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$this->data = $data; |
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} |
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public function toJson(): string |
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{ |
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if (! is_string($this->data)) { |
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return Json::encode($this->data); |
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} |
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return $this->data; |
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} |
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public function toArray(): array |
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{ |
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if (is_string($this->data)) { |
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return Json::decode($this->data); |
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} |
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return $this->data; |
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} |
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public function __toString() |
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{ |
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return $this->getContents(); |
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} |
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public function close(): void |
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{ |
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$this->data = ''; |
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$this->buffer = null; |
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} |
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public function detach() |
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{ |
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$this->close(); |
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return null; |
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} |
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public function getSize(): int |
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{ |
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if ($this->size === null) { |
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$this->size = strlen($this->getContents()); |
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} |
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return $this->size; |
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} |
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public function tell(): int |
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{ |
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throw new RuntimeException('Cannot determine the position of a JsonStream'); |
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} |
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public function eof(): bool |
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{ |
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if ($this->buffer === null) { |
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return false; |
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} |
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return $this->buffer === ''; |
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} |
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public function isSeekable(): bool |
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{ |
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return false; |
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} |
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/** |
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* @param int $offset |
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* @param int $whence |
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*/ |
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public function seek($offset, $whence = SEEK_SET): void |
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{ |
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throw new RuntimeException('Cannot seek a JsonStream'); |
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} |
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public function rewind(): void |
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{ |
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$this->buffer = null; |
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} |
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public function isWritable(): bool |
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{ |
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return false; |
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} |
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public function write($string): int |
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{ |
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throw new RuntimeException('Cannot write a JsonStream'); |
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} |
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public function isReadable(): bool |
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{ |
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return true; |
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} |
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/** |
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* @param int $length |
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* @return string |
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*/ |
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public function read($length): string |
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{ |
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if ($this->buffer === null) { |
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$this->buffer = $this->getContents(); |
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} |
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$currentLength = strlen($this->buffer); |
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if ($length >= $currentLength) { |
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// No need to slice the data because we don't have enough data. |
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$result = $this->buffer; |
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$this->buffer = ''; |
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} else { |
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// Slice up the result to provide a subset of the data. |
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$result = substr($this->buffer, 0, $length); |
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$this->buffer = substr($this->buffer, $length); |
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} |
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return $result; |
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} |
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34 |
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public function getContents(): string |
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{ |
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if (is_string($this->data)) { |
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return $this->data; |
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} |
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return Json::encode($this->data); |
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} |
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/** |
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* @param string|null $key |
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* @return array|mixed|null |
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*/ |
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public function getMetadata($key = null) |
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{ |
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$metadata = [ |
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'wrapper_data' => ['string'], |
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'wrapper_type' => 'string', |
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'stream_type' => 'string', |
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'mode' => 'r', |
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'unread_bytes' => $this->getSize() - strlen($this->buffer ?? ''), |
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'seekable' => $this->isSeekable(), |
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'timeout' => false, |
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'blocked' => false, |
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'eof' => $this->eof() |
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]; |
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if ($key === null) { |
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return $metadata; |
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} |
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return $metadata[$key] ?? null; |
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} |
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} |
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sandrokeil /
arangodb-php-client
