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<?php |
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namespace Wandu\Transformer; |
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use Wandu\Transformer\Contracts\TransformResource; |
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use Traversable; |
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class Transformer |
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{ |
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/** |
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* @param \Wandu\Transformer\Contracts\TransformResource|array|\Traversable $resource |
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* @param array $includes |
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* @return array |
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*/ |
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public function transform($resource, array $includes = []) |
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{ |
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if ($resource instanceof TransformResource) { |
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return $this->transformSingle($resource, $includes); |
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} |
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// iterator or Traversable |
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return $this->transformCollection($resource, $includes); |
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} |
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private function transformSingle(TransformResource $resource, $includes = []) |
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{ |
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$entity = $resource->transform(); |
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if (!is_array($entity)) return $entity; |
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// now, result is always array |
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foreach ($this->parseIncludes($resource, $includes) as $key => $nextIncludes) { |
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$entity = array_merge( |
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$entity, |
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$this->transformCollection($resource->includeAttribute($key) ?: [], $nextIncludes) |
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); |
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} |
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return $entity; |
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} |
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/** |
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* @param array|\Traversable $resources |
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* @param array $includes |
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* @return array |
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*/ |
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private function transformCollection($resources, array $includes = []) |
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{ |
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$result = []; |
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foreach ($resources as $key => $resource) { |
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if (is_array($resource) || $resource instanceof Traversable) { |
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$result[$key] = $this->transformCollection($resource, $includes); |
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} elseif ($resource instanceof TransformResource) { |
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$result[$key] = $this->transformSingle($resource, $includes); |
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} else { |
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$result[$key] = $resource; |
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} |
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} |
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return $result; |
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} |
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/** |
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* @param \Wandu\Transformer\Contracts\TransformResource $origin |
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* @param array $includes |
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* @return array |
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*/ |
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private function parseIncludes(TransformResource $origin, array $includes = []) |
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{ |
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$parsedIncludes = []; |
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foreach ($includes as $include => $condition) { |
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if (is_integer($include)) { |
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$include = $condition; |
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$condition = true; |
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} |
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while (is_callable($condition)) { |
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$condition = call_user_func($condition, $origin); |
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} |
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if (!$condition) continue; |
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if (strpos($include, '.') === false) { |
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$key = $include; |
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$param = null; |
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} else { |
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list($key, $param) = explode('.', $include, 2); |
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} |
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if (!isset($parsedIncludes[$key])) { |
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$parsedIncludes[$key] = []; |
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} |
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if ($param) { |
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$parsedIncludes[$key][] = $param; |
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} |
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} |
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return $parsedIncludes; |
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} |
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} |
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Wandu /
Framework
