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<?php |
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/** |
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* Incoming |
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* |
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* @author Trevor Suarez (Rican7) |
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* @copyright (c) Trevor Suarez |
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* @link https://github.com/Rican7/incoming |
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* @license MIT |
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*/ |
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declare(strict_types=1); |
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namespace Incoming\Structure; |
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use ArrayIterator; |
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use Incoming\Structure\Exception\InvalidStructuralTypeException; |
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use Traversable; |
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/** |
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* A default implementation of the `StructureFactory` for building the included |
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* structural types from loose input data. |
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*/ |
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class RecursiveInputStructureFactory implements StructureFactory |
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{ |
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/** |
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* Build a structure from a loose-type. |
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* |
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* @param mixed $data The input data. |
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* @return Structure The resulting data-structure. |
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*/ |
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public function build($data): Structure |
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{ |
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return static::buildFromTraversableLike($data); |
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} |
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/** |
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* Build a structure from "Traversable-like" data. |
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* |
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* This allows to build from data that is either an array or Traversable, as |
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* PHP's array type works JUST like a Traversable instance but doesn't |
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* actually implement any interfaces. |
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* |
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* @param Traversable|array $data The input data. |
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* @throws InvalidStructuralTypeException If the data type isn't supported. |
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* @return Structure The built structure. |
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*/ |
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protected static function buildFromTraversableLike($data): Structure |
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{ |
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if (is_array($data)) { |
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return static::buildFromArray($data); |
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} elseif ($data instanceof Traversable) { |
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return static::buildFromTraversable($data); |
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} |
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throw InvalidStructuralTypeException::withTypeInfo($data); |
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} |
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/** |
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* Build a structure from data in an array. |
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* |
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* @param array $data The input data. |
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* @return Structure The built structure. |
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*/ |
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protected static function buildFromArray(array $data): Structure |
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{ |
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return static::buildFromTraversable( |
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new ArrayIterator($data) |
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); |
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} |
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/** |
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* Build a structure from data in a Traversable instance. |
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* |
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* @param Traversable $data The input data. |
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* @return Structure The built structure. |
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*/ |
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protected static function buildFromTraversable(Traversable $data): Structure |
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{ |
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$is_map = false; |
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// Traverse through the data, but only check the first item's key |
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foreach ($data as $key => &$val) { |
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$is_map = $is_map || !is_int($key); |
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$val = self::attemptBuildTraversableLike($val); |
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} |
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if ($is_map) { |
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return Map::fromTraversable($data); |
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} |
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return FixedList::fromTraversable($data); |
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} |
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/** |
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* Attempt to build a structure from "Traversable-like" data. |
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* |
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* If the data type isn't supported, we simply return the original data |
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* untouched. This allows to more easily traverse deeply nested structures. |
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* |
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* @param mixed $data The input data. |
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* @return Structure|mixed The built structure or original data. |
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*/ |
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private static function attemptBuildTraversableLike($data) |
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{ |
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if (is_array($data) || $data instanceof Traversable) { |
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$data = static::buildFromTraversableLike($data); |
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} |
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return $data; |
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} |
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} |
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Rican7 /
incoming
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