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<?php |
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namespace LegalThings\DataEnricher\Processor; |
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use LegalThings\DataEnricher\Node; |
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use LegalThings\DataEnricher\Processor; |
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/** |
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* Merge multiple object into one |
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*/ |
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class Merge implements Processor |
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{ |
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use Processor\Implementation; |
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/** |
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* Apply processing to a single node |
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* |
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* @param Node $node |
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*/ |
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public function applyToNode(Node $node) |
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{ |
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$instruction = $node->getInstruction($this); |
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$list = $this->resolve($instruction); |
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if (isset($list) && !is_array($list)) { |
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throw new \Exception("Unable to apply {$this->property} processing instruction:" |
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. " Expected an array, got a " . (is_object($list) ? get_class($list) . ' ' : '') . gettype($list)); |
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} |
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$result = $this->merge((array)$list); |
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$node->setResult($result); |
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} |
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/** |
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* Resolve processing nodes in the instruction |
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* |
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* @param array $list |
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* @return array |
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*/ |
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public function resolve($list) |
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{ |
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if ($list instanceof Node) { |
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$list = $list->getResult(); |
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} |
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if (is_array($list)) { |
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foreach ($list as &$item) { |
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if ($item instanceof Node) { |
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$item = $item->getResult(); |
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} |
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if ($item instanceof \Traversable) { |
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$item = iterator_to_array($item); |
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} |
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} |
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} |
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return $list; |
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} |
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/** |
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* Merge properties of an object |
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* |
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* @param array $list |
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* @return \stdClass|array|string |
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*/ |
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protected function merge(array $list) |
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{ |
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if (empty($list)) { |
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return null; |
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} |
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$scalar = []; |
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foreach ($list as $key => &$item) { |
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if (!isset($item)) { |
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unset($list[$key]); |
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continue; |
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} |
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if (is_object($item)) { |
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$item = get_object_vars($item); |
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} |
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$scalar[] = is_scalar($item); |
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} |
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if (count(array_unique($scalar)) > 1) { |
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throw new \Exception("Unable to apply {$this->property} processing instruction:" |
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. " Mixture of scalar and non-scalar values"); |
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} |
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if ($scalar[0]) { |
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$result = join('', $list); |
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} else { |
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$result = call_user_func_array('array_merge', $list); |
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// Is associative array |
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if (array_keys($result) !== array_keys(array_keys($result))) { |
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$result = (object)$result; |
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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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legalthings /
data-enricher
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