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<?php |
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namespace Huntie\JsonApi\Support; |
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use InvalidArgumentException; |
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use Huntie\JsonApi\Exceptions\InvalidRelationPathException; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Support\Collection; |
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class RelationshipIterator |
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{ |
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/** |
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* The primary record. |
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*/ |
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private $record; |
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/** |
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* The path to the relation. |
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* |
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* @var string |
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*/ |
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private $path; |
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/** |
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* Create a new RelationshipIterator instance. |
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* |
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* @param Model $record The primary record |
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* @param string $path The path to the relation |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function __construct($record, string $path) |
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{ |
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if (!preg_match('/^([A-Za-z]+.?)+[A-Za-z]+$/', $path)) { |
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throw new InvalidArgumentException('The relationship path must be a valid string'); |
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} |
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$this->record = $record; |
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$this->path = $path; |
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} |
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/** |
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* Resolve the relationship from the primary record. |
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* |
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* @return Collection|Model|null |
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*/ |
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public function resolve() |
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{ |
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return $this->iterate($this->record, $this->path); |
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} |
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/** |
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* Recursively iterate through a given relation path to return the resolved |
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* relationship value. |
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* |
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* @param Collection|Model|null $resolved |
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* @param string|null $path |
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* |
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* @return Collection|Model|null |
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*/ |
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private function iterate($resolved, $path) |
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{ |
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if (empty($path)) { |
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return $resolved; |
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} |
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list($relation, $path) = array_pad(explode('.', $path, 2), 2, null); |
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$resolved = $resolved->{$relation}; |
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if ($resolved instanceof Collection) { |
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return $resolved->map(function ($record) use ($path) { |
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return $this->iterate($record, $path); |
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}); |
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} |
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if (!$resolved instanceof Model || in_array($relation, $resolved->getHidden())) { |
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throw new InvalidRelationPathException($this->path); |
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} |
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return $this->iterate($resolved, $path); |
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} |
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} |
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huntie /
laravel-simple-jsonapi
