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<?php |
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namespace LegalThings; |
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use LegalThings\DataEnricher\Node; |
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use LegalThings\DataEnricher\Processor; |
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/** |
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* Enrich objects by processing special properties. |
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*/ |
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class DataEnricher |
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{ |
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/** |
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* Default processors |
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* @var array |
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*/ |
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public static $defaultProcessors = [ |
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'<ifset>' => Processor\IfSet::class, |
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'<ref>' => Processor\Reference::class, |
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'<switch>' => Processor\SwitchChoose::class, |
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'<src>' => Processor\Http::class, |
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'<merge>' => Processor\Merge::class, |
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'<jmespath>' => Processor\JmesPath::class, |
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'<tpl>' => Processor\Mustache::class, |
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'<transformation>' => Processor\Transform::class, |
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// Deprecated |
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'_ref' => Processor\Reference::class, |
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'_switch' => Processor\SwitchChoose::class, |
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'_src' => Processor\Http::class, |
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'_merge' => Processor\Merge::class, |
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'_jmespath' => Processor\JmesPath::class, |
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'_tpl' => Processor\Mustache::class, |
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'_transformation' => Processor\Transform::class |
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]; |
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/** |
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* @var object |
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*/ |
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protected $source; |
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/** |
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* Processors, applied in specified order. |
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* |
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* @var DataEnricher\Processor[] |
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*/ |
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public $processors; |
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/** |
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* Class constructor |
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* |
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* @param object $source Data source |
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*/ |
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public function __construct($source) |
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{ |
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if (!is_object($source)) { |
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throw new \Exception("Data enricher on works on an object, not on a " . gettype($source)); |
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} |
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$this->source = $source; |
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foreach (static::$defaultProcessors as $property => $processor) { |
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if (is_string($processor)) { |
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$class = $processor; |
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$processor = new $class($this, $property); |
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} |
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$this->processors[] = $processor; |
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} |
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} |
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/** |
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* Get the source object |
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* |
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* @return object |
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*/ |
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public function getSource() |
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{ |
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return $this->source; |
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} |
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/** |
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* Apply processing instructions |
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* |
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* @param array|object|string $target Target or dot key path |
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*/ |
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public function applyTo($target) |
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{ |
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if (is_string($target)) { |
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$target = \DotKey::on($this->source)->get($target); |
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} |
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$nodes = $this->findNodes($target); |
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foreach ($this->processors as $processor) { |
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$processor->prepare($nodes); |
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} |
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foreach ($nodes as $node) { |
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$this->applyToNode($node); |
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} |
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$this->applyNodeResults($target); |
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} |
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/** |
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* Apply processing instructions to node |
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* |
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* @param Node $node |
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*/ |
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protected function applyToNode(Node $node) |
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{ |
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foreach ($this->processors as $processor) { |
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if ($node->hasInstruction($processor)) { |
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$processor->applyToNode($node); |
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} |
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} |
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} |
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/** |
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* Find nodes that have processing instructions |
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* |
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* @param array|object $target |
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* @return array |
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*/ |
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public function findNodes(&$target) |
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{ |
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$nodes = []; |
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foreach ($target as $key => &$value) { |
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if (is_array($value) || (is_object($value) && !$value instanceof Node)) { |
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$nodes = array_merge($nodes, $this->findNodes($value)); |
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} |
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if ($value instanceof \stdClass && $this->hasProcessorProperty($value)) { |
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$value = new Node($value); |
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$nodes[] = $value; |
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} |
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} |
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return $nodes; |
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} |
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/** |
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* Check if object has at leas one process property |
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* |
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* @param \stdClass $value |
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* @return boolean |
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*/ |
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protected function hasProcessorProperty($value) |
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{ |
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$processorProps = array_map(function ($processor) { |
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return $processor->getProperty(); |
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}, $this->processors); |
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$valueProps = array_keys(get_object_vars($value)); |
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return count(array_intersect($valueProps, $processorProps)) > 0; |
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} |
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/** |
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* Replace nodes with their results |
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* |
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* @param array|object $target |
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*/ |
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public function applyNodeResults(&$target) |
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{ |
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foreach ($target as &$value) { |
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if ($value instanceof Node) { |
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$value = $value->getResult(); |
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} elseif (is_array($value) || is_object($value)) { |
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$this->applyNodeResults($value); |
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} |
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} |
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} |
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/** |
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* Enrich object |
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* |
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* @param object $subject |
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*/ |
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public static function process($subject) |
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{ |
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$enrich = new static($subject); |
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$enrich->applyTo($subject); |
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} |
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} |
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|
legalthings /
data-enricher
