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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\Loaders\File; |
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use fab2s\NodalFlow\NodalFlowException; |
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use fab2s\NodalFlow\YaEtlException; |
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use fab2s\YaEtl\Extractors\File\FileExtractorAbstract; |
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use fab2s\YaEtl\Traits\CsvHandlerTrait; |
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/** |
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* Class CsvExtractor |
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*/ |
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class CsvExtractor extends FileExtractorAbstract |
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{ |
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use CsvHandlerTrait; |
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/** |
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* CsvLoader constructor. |
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* |
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* @param resource|string $input |
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* @param string|null $delimiter |
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* @param string|null $enclosure |
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* @param string|null $escape |
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* |
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* @throws NodalFlowException |
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* @throws YaEtlException |
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*/ |
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public function __construct($input, $delimiter = null, $enclosure = null, $escape = null) |
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{ |
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parent::__construct($input); |
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$this->initCsvOptions($delimiter, $enclosure, $escape); |
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} |
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/** |
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* @param mixed $param |
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* |
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* @return \Generator |
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*/ |
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public function getTraversable($param = null) |
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{ |
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if (!$this->extract($param)) { |
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return; |
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} |
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if (false !== ($firstRecord = $this->getFirstRecord())) { |
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/* @var array $firstRecord */ |
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yield $this->bakeRecord($firstRecord); |
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} |
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while (false !== ($record = fgetcsv($this->handle, 0, $this->delimiter, $this->enclosure, $this->escape))) { |
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/* @var array $record */ |
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yield $this->bakeRecord($record); |
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} |
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$this->releaseHandle(); |
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} |
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/** |
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* @param array $record |
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* |
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* @return array |
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*/ |
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protected function bakeRecord(array $record) |
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{ |
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return isset($this->header) ? array_combine($this->header, $record) : $record; |
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} |
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/** |
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* @return string|bool |
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*/ |
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protected function getFirstRecord() |
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{ |
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while (false !== ($line = fgets($this->handle))) { |
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if ($line = trim($this->trimBom($line))) { |
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$record = $this->handleHeader($line); |
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if ($record === false) { |
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continue; |
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} |
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return $record; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param string $line |
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* |
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* @return array|bool |
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*/ |
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protected function handleHeader($line) |
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{ |
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// obey excel sep |
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if (strpos($line, 'sep=') === 0) { |
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$this->useSep = true; |
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$this->delimiter = $line[4]; |
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return false; |
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} |
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$record = str_getcsv($line, $this->delimiter, $this->enclosure, $this->escape); |
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if ($this->useHeader && !isset($this->header)) { |
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$this->header = array_map('trim', $record); |
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return false; |
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} |
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return $record; |
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} |
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/** |
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* @param array $record |
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* |
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* @return bool|int |
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*/ |
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protected function writeCsvLine(array $record) |
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{ |
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return fputcsv($this->handle, $record, $this->delimiter, $this->enclosure, $this->escape); |
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} |
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} |
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fab2s /
YaEtl
