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<?php |
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/* |
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* This file is part of YaEtl. |
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* (c) Fabrice de Stefanis / https://github.com/fab2s/YaEtl |
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* This source file is licensed under the MIT license which you will |
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* find in the LICENSE file or at https://opensource.org/licenses/MIT |
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*/ |
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namespace fab2s\YaEtl\Extractors\File; |
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use fab2s\NodalFlow\NodalFlowException; |
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use fab2s\NodalFlow\YaEtlException; |
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use fab2s\OpinHelpers\Bom; |
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use fab2s\YaEtl\Extractors\ExtractorAbstract; |
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use fab2s\YaEtl\Traits\FileHandlerTrait; |
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/** |
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* Class FileExtractorAbstract |
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*/ |
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abstract class FileExtractorAbstract extends ExtractorAbstract |
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{ |
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use FileHandlerTrait; |
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/** |
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* @param resource|string $input |
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* |
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* @throws YaEtlException |
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* @throws NodalFlowException |
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*/ |
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public function __construct($input) |
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{ |
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$this->initHandle($input, 'rb'); |
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parent::__construct(); |
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} |
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/** |
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* @param mixed $param |
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* |
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* @return bool |
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*/ |
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public function extract($param = null) |
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{ |
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$this->getCarrier()->getFlowMap()->incrementNode($this->getId(), 'num_extract'); |
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return !feof($this->handle); |
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} |
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/** |
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* @return bool |
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*/ |
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protected function readBom() |
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{ |
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if (false === ($buffer = $this->getNextNonEmptyChars())) { |
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return false; |
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} |
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/* @var string $buffer */ |
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$firstCharPos = ftell($this->handle); |
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if (false === ($chars = fread($this->handle, 3))) { |
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return false; |
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} |
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/* @var string $chars */ |
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$buffer .= $chars; |
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if ($bom = Bom::extract($buffer)) { |
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$this->encoding = Bom::getBomEncoding($bom); |
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return !fseek($this->handle, $firstCharPos + strlen($bom) - 1); |
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} |
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return !fseek($this->handle, $firstCharPos - 1); |
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} |
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/** |
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* @return string|false |
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*/ |
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protected function getNextNonEmptyLine() |
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{ |
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while (false !== ($line = fgets($this->handle))) { |
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if ('' === ($line = trim($line))) { |
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continue; |
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} |
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return $line; |
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} |
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return false; |
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} |
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/** |
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* @return string|false |
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*/ |
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protected function getNextNonEmptyChars() |
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{ |
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do { |
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if (false === ($char = fread($this->handle, 1))) { |
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return false; |
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} |
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} while (trim($char) === ''); |
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return $char; |
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} |
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} |
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fab2s /
YaEtl
