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<?php |
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namespace Zerg\Field; |
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use Zerg\DataSet; |
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use Zerg\Stream\AbstractStream; |
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/** |
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* Class Collection compose other types of fields. |
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* |
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* This field return array of values, that are read from Stream by other types of fields. |
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* |
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* @since 0.1 |
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* @package Zerg\Field |
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*/ |
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class Collection extends AbstractField implements \ArrayAccess, \Iterator |
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{ |
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/** |
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* @var AbstractField[] List of children fields. |
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*/ |
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protected $fields; |
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public function __construct($schema, $options = []) |
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{ |
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$this->initFromArray($schema); |
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$this->configure($options); |
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} |
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/** |
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* Add a new child node to field list. |
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* |
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* @param string $name The field name. |
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* @param AbstractField $child Field instance. |
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*/ |
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public function addField($name, AbstractField $child) |
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{ |
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$this->fields[$name] = $child; |
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} |
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/** |
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* Recursively call parse method of all children and store values in associated DataSet. |
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* |
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* @api |
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* @param AbstractStream $stream Stream from which children read. |
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* @return array Array of parsed values. |
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*/ |
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public function parse(AbstractStream $stream) |
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{ |
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if (!($this->dataSet instanceof DataSet)) { |
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$this->dataSet = new DataSet; |
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} |
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$this->rewind(); |
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do { |
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$field = $this->current(); |
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$field->setDataSet($this->getDataSet()); |
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if ($field instanceof Conditional) { |
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$field = $field->resolveField(); |
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} |
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if ($field instanceof self) { |
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$this->dataSet->push($this->key()); |
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$field->parse($stream); |
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$this->dataSet->pop(); |
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} else { |
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$this->dataSet->setValue($this->key(), $field->parse($stream)); |
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} |
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$this->next(); |
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} while ($this->valid()); |
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if (isset($this->assert)) { |
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$this->validate($this->dataSet->getValueByCurrentPath()); |
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} |
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return $this->dataSet->getData(); |
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} |
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/** |
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* Recursively creates field instances form their declarations. |
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* |
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* @param array $fieldArray Array of declarations. |
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* @throws ConfigurationException If one of declarations are invalid. |
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*/ |
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private function initFromArray(array $fieldArray = []) |
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{ |
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foreach ($fieldArray as $fieldName => $fieldParams) { |
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$this->addField($fieldName, Factory::get($fieldParams)); |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->fields[$offset]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->fields[$offset]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->fields[$offset] = $value; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->fields[$offset]); |
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} |
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/** |
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* @inheritdoc |
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* @return AbstractField |
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*/ |
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public function current() |
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{ |
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return current($this->fields); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function next() |
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{ |
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next($this->fields); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function key() |
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{ |
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return key($this->fields); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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3 |
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public function valid() |
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{ |
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return isset($this->fields[$this->key()]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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3 |
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public function rewind() |
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{ |
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reset($this->fields); |
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} |
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} |
klermonte /
zerg
