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<?php /** @noinspection PhpVariableVariableInspection */ |
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declare(strict_types=1); |
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namespace Improved; |
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/** |
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* Deconstruct an iterable property/item for each element. The result is one element for each item in the iterable |
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* property. |
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* |
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* @param iterable $iterable Iterable holding arrays or objects |
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* @param int|string $column |
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* @param int|string|null $mapKey The name of a new property to hold the array index of the element |
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* @param bool $preserveKeys Preserve the keys of the iterable (will result in duplicate keys) |
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* @return \Generator |
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*/ |
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15 |
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function iterable_unwind(iterable $iterable, $column, $mapKey = null, bool $preserveKeys = false): \Generator |
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{ |
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14 |
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$counter = 0; |
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14 |
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$setArray = function ($element, $value, $key) use ($column, $mapKey) { |
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return array_merge($element, [$column => $value], $mapKey === null ? [] : [$mapKey => $key]); |
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}; |
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14 |
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$setArrayAccess = function ($element, $value, $key) use ($column, $mapKey) { |
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2 |
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$copy = clone $element; |
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2 |
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$copy[$column] = $value; |
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2 |
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if ($mapKey !== null) { |
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1 |
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$copy[$mapKey] = $key; |
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} |
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return $copy; |
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14 |
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}; |
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14 |
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$setObject = function ($element, $value, $key) use ($column, $mapKey) { |
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$copy = clone $element; |
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2 |
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$copy->$column = $value; |
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2 |
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if ($mapKey !== null) { |
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1 |
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$copy->$mapKey = $key; |
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} |
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2 |
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return $copy; |
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14 |
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}; |
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14 |
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foreach ($iterable as $topKey => $element) { |
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$set = null; |
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$iterated = false; |
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if (is_array($element)) { |
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$value = $element[$column] ?? null; |
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$set = $setArray; |
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} elseif ($element instanceof \ArrayAccess) { |
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$value = $element[$column] ?? null; |
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$set = $setArrayAccess; |
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} elseif (is_object($element) && !$element instanceof \DateTimeInterface) { |
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$value = $element->$column ?? null; |
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2 |
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$set = $setObject; |
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} else { |
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$value = null; |
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} |
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if (!is_iterable($value) || $set === null) { |
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yield ($preserveKeys ? $topKey : $counter++) => $element; |
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continue; |
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} |
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foreach ($value as $key => $item) { |
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$iterated = true; |
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yield ($preserveKeys ? $topKey : $counter++) => $set($element, $item, $key); |
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} |
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if (!$iterated) { |
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yield ($preserveKeys ? $topKey : $counter++) => $set($element, null, null); |
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} |
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} |
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} |
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jasny /
improved-php-iterable
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