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<?php |
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/* |
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* This file is part of the SomeWork/OffsetPage package. |
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* |
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* (c) Pinchuk Igor <[email protected]> |
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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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namespace SomeWork\OffsetPage; |
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class OffsetResult |
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{ |
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/** |
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* @var int |
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*/ |
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protected $totalCount = 0; |
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/** |
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* @var \Generator |
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*/ |
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protected $generator; |
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/** |
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* OffsetResult constructor. |
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* |
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* @param \Generator $sourceResultGenerator |
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* |
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* @throws \UnexpectedValueException |
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*/ |
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public function __construct(\Generator $sourceResultGenerator) |
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{ |
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$this->generator = $this->execute($sourceResultGenerator); |
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if ($this->generator->valid()) { |
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$this->generator->current(); |
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} |
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} |
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/** |
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* @throws \UnexpectedValueException |
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* |
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* @return mixed|null |
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*/ |
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public function fetch() |
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{ |
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if ($this->generator->valid()) { |
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$value = $this->generator->current(); |
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$this->generator->next(); |
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return $value; |
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} |
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} |
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/** |
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* @throws \UnexpectedValueException |
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* |
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* @return array |
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*/ |
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public function fetchAll() |
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{ |
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$result = []; |
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while (($data = $this->fetch()) || $data !== null) { |
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$result[] = $data; |
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} |
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return $result; |
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} |
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/** |
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* @return int |
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*/ |
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public function getTotalCount() |
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{ |
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return $this->totalCount; |
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} |
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/** |
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* @param \Generator $generator |
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* |
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* @throws \UnexpectedValueException |
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* |
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* @return \Generator |
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*/ |
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protected function execute(\Generator $generator) |
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{ |
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foreach ($generator as $sourceResult) { |
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if (!is_object($sourceResult) || !($sourceResult instanceof SourceResultInterface)) { |
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throw new \UnexpectedValueException(sprintf( |
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'Result of generator is not an instance of %s', |
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SourceResultInterface::class |
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)); |
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} |
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$sourceCount = $sourceResult->getTotalCount(); |
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if ($sourceCount > $this->totalCount) { |
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$this->totalCount = $sourceCount; |
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} |
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foreach ($sourceResult->generator() as $result) { |
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yield $result; |
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} |
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} |
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} |
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} |
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somework /
offset-page
