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<?php |
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declare(strict_types=1); |
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namespace Eclipxe\XlsxExporter\Providers; |
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use Countable; |
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use Eclipxe\XlsxExporter\ProviderInterface; |
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use Eclipxe\XlsxExporter\Utils\ProviderGetValue; |
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use Iterator; |
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/** |
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* ProviderIterator is a facade to be able to use any Iterator as a Provider |
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* |
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* The iterator current method must return an array, an ArrayAccess or an object, |
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* the code will check if the key is set in the element, if it is not set then |
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* will return null |
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* |
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* As the Iterator does not know the length of the elements by itself then it is |
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* desirable to provide the total count from the constructor. |
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* If a negative number is provided then the function will traverse the hole iterator |
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* to count the total elements. |
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*/ |
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class ProviderIterator implements ProviderInterface |
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{ |
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private Iterator $iterator; |
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private int $count; |
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/** |
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* ProviderIterator constructor. |
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* @param Iterator $iterator |
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* @param int $count The total count of records, -1 to obtain |
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*/ |
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public function __construct(Iterator $iterator, int $count = -1) |
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{ |
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$this->iterator = $iterator; |
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if (! is_int($count) || $count < 0) { |
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if ($this->iterator instanceof Countable) { |
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$count = $this->iterator->count(); |
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} else { |
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$count = iterator_count($this->iterator); |
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$this->iterator->rewind(); |
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} |
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} |
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$this->count = $count; |
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} |
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public function get(string $key) |
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{ |
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return ProviderGetValue::get($this->iterator->current(), $key); |
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} |
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public function next(): void |
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{ |
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$this->iterator->next(); |
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} |
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public function valid(): bool |
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{ |
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return $this->iterator->valid(); |
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} |
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public function count(): int |
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{ |
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return $this->count; |
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} |
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} |
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eclipxe13 /
XLSXExporter
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