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<?php |
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namespace Rodenastyle\StreamParser\Extensions; |
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use Rodenastyle\StreamParser\Exceptions\UndefinedCallbackException; |
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use Rodenastyle\StreamParser\StreamParserInterface; |
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/** |
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* Created by PhpStorm. |
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* User: Loïc Gouttefangeas <[email protected]> |
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* Date: 25/08/2018 |
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* Time: 20:59 |
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*/ |
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class ChunkExtension implements \Rodenastyle\StreamParser\StreamParserInterface |
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{ |
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const DEFAULT_CHUNK_SIZE = 5000; |
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/** |
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* @var \Rodenastyle\StreamParser\StreamParserInterface |
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*/ |
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private $parser; |
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private $iterationCount = 0; |
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private $chunkSize; |
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/** @var callable $onChunkCompleteCallback */ |
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private $onChunkCompleteCallback; |
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public function __construct(\Rodenastyle\StreamParser\StreamParserInterface $parser, $chunkSize = self::DEFAULT_CHUNK_SIZE) |
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{ |
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$this->parser = $parser; |
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$this->chunkSize = $chunkSize; |
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} |
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public function from(String $source): \Rodenastyle\StreamParser\StreamParserInterface |
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{ |
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return $this->parser->from($source); |
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} |
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public function eachChunk(callable $function): StreamParserInterface |
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{ |
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$this->onChunkCompleteCallback = $function; |
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return $this; |
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} |
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public function each(callable $function) |
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{ |
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if ($this->onChunkCompleteCallback === null) { |
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throw new UndefinedCallbackException("No callback is set on chunk complete"); |
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} |
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// decorate function to apply both its behavior and the chunk process |
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$function = function ($collection) use ($function) { |
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$this->iterationCount++; |
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$function($collection); |
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if ($this->iterationCount % $this->chunkSize === 0) { |
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$this->executeChunkCompleteCallback(); |
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} |
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}; |
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$this->parser->each($function); |
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// make sure no entry is left out |
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$this->processLastEntries(); |
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return $this; |
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} |
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/** |
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* @param $this |
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*/ |
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protected function executeChunkCompleteCallback() |
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{ |
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$this->iterationCount = 0; |
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($this->onChunkCompleteCallback)(); |
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} |
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protected function processLastEntries() |
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{ |
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if ($this->iterationCount % $this->chunkSize !== 0) { |
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$this->executeChunkCompleteCallback(); |
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} |
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} |
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/** |
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* @param int $chunkSize |
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* @return ChunkExtension |
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*/ |
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public function setChunkSize(int $chunkSize): ChunkExtension |
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{ |
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$this->chunkSize = $chunkSize; |
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return $this; |
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} |
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/** |
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* @return \Rodenastyle\StreamParser\StreamParserInterface |
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*/ |
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public function getParser(): \Rodenastyle\StreamParser\StreamParserInterface |
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{ |
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return $this->parser; |
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} |
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} |
Rodenastyle /
stream-parser
