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<?php
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declare(strict_types=1);
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namespace OpenSpout\Reader\CSV;
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use OpenSpout\Reader\SheetIteratorInterface;
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/**
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 * @implements SheetIteratorInterface<Sheet>
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 */
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final class SheetIterator implements SheetIteratorInterface
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{
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    /** @var Sheet The CSV unique "sheet" */
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    private readonly Sheet $sheet;
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    /** @var bool Whether the unique "sheet" has already been read */
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    private bool $hasReadUniqueSheet = false;
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    /**
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     * @param Sheet $sheet Corresponding unique sheet
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     */
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    public function __construct(Sheet $sheet)
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    {
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        $this->sheet = $sheet;
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    }
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    /**
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     * Rewind the Iterator to the first element.
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     *
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     * @see http://php.net/manual/en/iterator.rewind.php
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     */
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    public function rewind(): void
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    {
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        $this->hasReadUniqueSheet = false;
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    }
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    /**
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     * Checks if current position is valid.
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     *
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     * @see http://php.net/manual/en/iterator.valid.php
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     */
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    public function valid(): bool
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    {
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        return !$this->hasReadUniqueSheet;
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    }
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    /**
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     * Move forward to next element.
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     *
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     * @see http://php.net/manual/en/iterator.next.php
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     */
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    public function next(): void
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    {
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        $this->hasReadUniqueSheet = true;
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    }
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    /**
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     * Return the current element.
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     *
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     * @see http://php.net/manual/en/iterator.current.php
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     */
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    public function current(): Sheet
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    {
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        return $this->sheet;
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    }
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    /**
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     * Return the key of the current element.
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     *
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     * @see http://php.net/manual/en/iterator.key.php
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     */
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    public function key(): int
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    {
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        return 1;
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    }
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}