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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Data\Reader; |
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use Yiisoft\Arrays\ArrayHelper; |
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use Yiisoft\Data\Reader\Filter\All; |
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use Yiisoft\Data\Reader\Filter\Any; |
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use Yiisoft\Data\Reader\Filter\FilterInterface; |
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use Yiisoft\Data\Reader\Filter\Equals; |
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use Yiisoft\Data\Reader\Filter\GreaterThan; |
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use Yiisoft\Data\Reader\Filter\GreaterThanOrEqual; |
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use Yiisoft\Data\Reader\Filter\LessThan; |
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use Yiisoft\Data\Reader\Filter\LessThanOrEqual; |
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use Yiisoft\Data\Reader\Filter\In; |
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use Yiisoft\Data\Reader\Filter\Like; |
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use Yiisoft\Data\Reader\Filter\Not; |
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final class IterableDataReader implements DataReaderInterface, SortableDataInterface, FilterableDataInterface, OffsetableDataInterface, CountableDataInterface |
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{ |
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private $data; |
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private $sort; |
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/** |
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* @var FilterInterface |
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*/ |
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private $filter; |
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private $limit = self::DEFAULT_LIMIT; |
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private $offset = 0; |
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public function __construct(iterable $data) |
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{ |
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$this->data = $data; |
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} |
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public function withSort(?Sort $sort): self |
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{ |
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$new = clone $this; |
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$new->sort = $sort; |
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return $new; |
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} |
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public function getSort(): ?Sort |
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{ |
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return $this->sort; |
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} |
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/** |
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* Sorts data items according to the given sort definition. |
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* @param iterable $items the items to be sorted |
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* @param Sort $sort the sort definition |
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* @return array the sorted items |
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*/ |
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private function sortItems(iterable $items, Sort $sort): iterable |
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{ |
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$criteria = $sort->getCriteria(); |
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if ($criteria !== []) { |
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$items = $this->iterableToArray($items); |
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ArrayHelper::multisort($items, array_keys($criteria), array_values($criteria)); |
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} |
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return $items; |
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} |
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private function matchFilter(array $item, array $filter): bool |
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{ |
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$operation = array_shift($filter); |
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$arguments = $filter; |
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switch ($operation) { |
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case Not::getOperator(): |
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return !$this->matchFilter($item, $arguments[0]); |
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case Any::getOperator(): |
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foreach ($arguments[0] as $subFilter) { |
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if ($this->matchFilter($item, $subFilter)) { |
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return true; |
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} |
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} |
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return false; |
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case All::getOperator(): |
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foreach ($arguments[0] as $subFilter) { |
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if (!$this->matchFilter($item, $subFilter)) { |
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return false; |
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} |
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} |
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return true; |
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case Equals::getOperator(): |
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[$field, $value] = $arguments; |
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return $item[$field] == $value; |
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case GreaterThan::getOperator(): |
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[$field, $value] = $arguments; |
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return $item[$field] > $value; |
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case GreaterThanOrEqual::getOperator(): |
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[$field, $value] = $arguments; |
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return $item[$field] >= $value; |
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case LessThan::getOperator(): |
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[$field, $value] = $arguments; |
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return $item[$field] < $value; |
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case LessThanOrEqual::getOperator(): |
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[$field, $value] = $arguments; |
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return $item[$field] <= $value; |
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case In::getOperator(): |
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[$field, $values] = $arguments; |
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return in_array($item[$field], $values, false); |
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case Like::getOperator(): |
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[$field, $value] = $arguments; |
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return stripos($item[$field], $value) !== false; |
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default: |
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throw new \RuntimeException("Operation \"$operation\" is not supported"); |
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} |
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} |
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public function withFilter(?FilterInterface $filter): self |
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{ |
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$new = clone $this; |
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$new->filter = $filter; |
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return $new; |
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} |
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public function withLimit(int $limit): self |
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{ |
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$new = clone $this; |
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$new->limit = $limit; |
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return $new; |
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} |
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public function read(): iterable |
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{ |
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$filter = null; |
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if ($this->filter !== null) { |
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$filter = $this->filter->toArray(); |
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} |
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$data = []; |
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$skipped = 0; |
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$sortedData = $this->sort === null |
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? $this->data |
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: $this->sortItems($this->data, $this->sort); |
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foreach ($sortedData as $item) { |
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// do not return more than limit items |
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if (count($data) === $this->limit) { |
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break; |
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} |
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// skip offset items |
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if ($skipped < $this->offset) { |
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$skipped++; |
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continue; |
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} |
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// filter items |
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if ($filter === null || $this->matchFilter($item, $filter)) { |
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$data[] = $item; |
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} |
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} |
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return $data; |
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} |
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public function withOffset(int $offset): self |
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{ |
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$new = clone $this; |
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$new->offset = $offset; |
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return $new; |
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} |
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5 |
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public function count(): int |
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{ |
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return count($this->read()); |
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} |
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4 |
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private function iterableToArray(iterable $iterable): array |
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{ |
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return $iterable instanceof \Traversable ? iterator_to_array($iterable, true) : (array)$iterable; |
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} |
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} |
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yiisoft /
data
