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<?php |
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/** |
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* This file is part of graze/data-file |
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* |
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* Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com> |
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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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* @license https://github.com/graze/data-file/blob/master/LICENSE.md |
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* @link https://github.com/graze/data-file |
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*/ |
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namespace Graze\DataFile\Format\Parser; |
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use ArrayIterator; |
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use CallbackFilterIterator; |
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use Graze\CsvToken\Csv\CsvConfiguration; |
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use Graze\CsvToken\Parser; |
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use Graze\CsvToken\Tokeniser\StreamTokeniser; |
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use Graze\DataFile\Format\CsvFormatInterface; |
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use Graze\DataFile\Helper\MapIterator; |
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use Iterator; |
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use LimitIterator; |
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use Psr\Http\Message\StreamInterface; |
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use RuntimeException; |
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class CsvParser implements ParserInterface |
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{ |
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/** @var CsvFormatInterface */ |
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private $csvFormat; |
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/** @var array */ |
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private $headerRow = []; |
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/** |
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* @param CsvFormatInterface $csvFormat |
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*/ |
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public function __construct(CsvFormatInterface $csvFormat) |
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{ |
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$this->csvFormat = $csvFormat; |
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} |
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/** |
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* @param StreamInterface $stream |
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* |
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* @return Iterator |
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*/ |
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public function parse(StreamInterface $stream) |
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{ |
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$configuration = new CsvConfiguration([ |
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CsvConfiguration::OPTION_DELIMITER => $this->csvFormat->getDelimiter(), |
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CsvConfiguration::OPTION_QUOTE => $this->csvFormat->getQuoteCharacter(), |
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CsvConfiguration::OPTION_ESCAPE => $this->csvFormat->getEscapeCharacter(), |
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CsvConfiguration::OPTION_DOUBLE_QUOTE => $this->csvFormat->isDoubleQuote(), |
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CsvConfiguration::OPTION_NEW_LINE => $this->csvFormat->getLineTerminator(), |
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CsvConfiguration::OPTION_NULL => $this->csvFormat->getNullOutput(), |
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]); |
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$tokeniser = new StreamTokeniser($configuration, $stream); |
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$parser = new Parser(); |
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return $this->parseIterator( |
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$parser->parse($tokeniser->getTokens()) |
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); |
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} |
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/** |
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* Parse a supplied iterator |
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* |
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* @param Iterator $iterator |
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* |
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* @return Iterator |
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*/ |
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private function parseIterator(Iterator $iterator) |
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{ |
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$iterator = $this->parseHeaderRow($iterator); |
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if ($this->csvFormat->getDataStart() > 1 || $this->csvFormat->getLimit() !== -1) { |
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$iterator = new LimitIterator( |
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$iterator, |
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max(0, $this->csvFormat->getDataStart() - 1), |
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$this->csvFormat->getLimit() |
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); |
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} |
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return $iterator; |
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} |
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/** |
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* @param Iterator $iterator |
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* |
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* @return Iterator |
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*/ |
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private function parseHeaderRow(Iterator $iterator) |
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{ |
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if ($this->csvFormat->hasHeaderRow()) { |
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// use a callback iterator to get just the header row without having to rewind the source |
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$iterator = new CallbackFilterIterator($iterator, function ($current, $key) { |
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if ($key == $this->csvFormat->getHeaderRow() - 1) { |
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$arr = iterator_to_array($current); |
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if (count($arr) > 1 || strlen($arr[0]) > 0) { |
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$this->headerRow = $arr; |
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} |
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} |
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return true; |
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}); |
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// map the header row onto each row if applicable |
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$iterator = new MapIterator($iterator, function ($current) { |
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if (count($this->headerRow) > 0) { |
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if (count($this->headerRow) !== count($current)) { |
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throw new RuntimeException( |
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"The number of entries in: " . implode(',', iterator_to_array($current)) . |
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" does not match the header: " . implode(',', $this->headerRow) |
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); |
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} |
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return new ArrayIterator(array_combine( |
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$this->headerRow, |
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iterator_to_array($current) |
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)); |
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} |
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return $current; |
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}); |
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} |
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return $iterator; |
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} |
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} |
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graze /
data-file
