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<?php |
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/** |
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* This file is part of PhpAidc LabelPrinter package. |
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* |
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* © Appwilio (https://appwilio.com) |
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* © JhaoDa (https://github.com/jhaoda) |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace PhpAidc\LabelPrinter\Connector; |
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use PhpAidc\LabelPrinter\Contract\Connector; |
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use PhpAidc\LabelPrinter\Exception\CouldNotConnectToPrinter; |
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final class NetworkConnector implements Connector |
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{ |
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/** @var string */ |
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private $host; |
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/** @var int */ |
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private $port; |
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/** @var int */ |
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private $timeout; |
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/** @var resource */ |
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private $handle; |
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/** @var array|null */ |
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private $lastError; |
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public function __construct(string $host, int $port = 9100, int $timeout = 1) |
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{ |
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$this->host = $host; |
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$this->port = $port; |
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$this->timeout = $timeout; |
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} |
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public function open(): void |
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{ |
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if (\is_resource($this->handle)) { |
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return; |
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} |
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$this->setErrorHandler(); |
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try { |
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$this->handle = \stream_socket_client("tcp://{$this->host}:{$this->port}", $severity, $message, $this->timeout); |
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$this->flushErrors(); |
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\stream_set_timeout($this->handle, $this->timeout, 0); |
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} catch (\ErrorException $e) { |
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throw CouldNotConnectToPrinter::becauseNetworkError($e->getMessage()); |
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} |
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} |
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public function write($data): int |
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{ |
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$this->open(); |
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$this->setErrorHandler(); |
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$result = \fwrite($this->handle, $data, \strlen($data)); |
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$this->flushErrors(); |
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return $result; |
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} |
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public function read(int $length = 0) |
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{ |
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$this->open(); |
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$result = ''; |
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while (true) { |
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$this->setErrorHandler(); |
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$buffer = \fread($this->handle, 8192); |
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$this->flushErrors(); |
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$result .= $buffer; |
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if (\mb_strlen($buffer) < 8192) { |
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break; |
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} |
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} |
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return $result; |
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} |
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public function close(): void |
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{ |
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if (\is_resource($this->handle)) { |
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$this->setErrorHandler(); |
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\fclose($this->handle); |
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$this->flushErrors(); |
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$this->handle = null; |
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} |
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} |
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public function __destruct() |
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{ |
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$this->close(); |
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} |
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private function setErrorHandler(): void |
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{ |
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$this->lastError = null; |
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\set_error_handler(function ($severity, $message, $file, $line) { |
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$this->lastError = \compact('severity', 'message', 'file', 'line'); |
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}); |
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} |
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private function flushErrors(): void |
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{ |
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\restore_error_handler(); |
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if ($this->lastError) { |
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throw new \ErrorException( |
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$this->lastError['message'], |
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0, |
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$this->lastError['severity'], |
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$this->lastError['file'], |
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$this->lastError['line'] |
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); |
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} |
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} |
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} |
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php-aidc /
label-printer
