1 | <?php |
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18 | final class ChunkIterator implements Iterator |
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19 | { |
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20 | protected $iterator; |
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21 | protected $size; |
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22 | protected $chunk; |
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23 | protected $position; |
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24 | |||
25 | 6 | public function __construct(iterable $iterable, int $size = null) |
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26 | { |
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27 | 6 | if (is_array($iterable)) { |
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28 | 5 | $iterable = new ArrayIterator($iterable); |
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29 | } |
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30 | |||
31 | 6 | $this->iterator = $iterable; |
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32 | 6 | $this->size = $size ?? 1; |
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33 | 6 | } |
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34 | |||
35 | 4 | public function current() |
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36 | { |
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37 | 4 | return $this->chunk; |
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38 | } |
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39 | |||
40 | 6 | public function next() |
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41 | { |
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42 | 6 | $this->chunk = []; |
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43 | 6 | $this->position++; |
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44 | |||
45 | 6 | for ($i = 0; $i < $this->size && $this->iterator->valid(); $i++) { |
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46 | 4 | $this->chunk[] = $this->iterator->current(); |
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47 | 4 | $this->iterator->next(); |
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48 | } |
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49 | 6 | } |
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50 | |||
51 | 4 | public function key() |
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55 | |||
56 | 6 | public function valid() |
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57 | { |
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58 | 6 | return (bool)$this->chunk; |
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60 | |||
61 | 6 | public function rewind() |
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67 | } |
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68 |