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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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* This abstract class represents any type of field - an entity that takes, processes and |
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* returns some data from Stream. Also field has access |
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* to DataSet from which it takes config values by given paths. |
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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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abstract class AbstractField |
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{ |
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/** |
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* @var DataSet The DataSet from which this field take values by path. |
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*/ |
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protected $dataSet; |
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/** |
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* @var mixed Value to compare parse result. |
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*/ |
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protected $assert; |
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/** |
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* @var array Cache to found values. |
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*/ |
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protected $propertyCache = []; |
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/** |
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* Read and process data from Stream. |
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* |
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* @api |
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* @param AbstractStream $stream Stream from which field should read. |
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* @return mixed Processed value. |
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*/ |
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abstract public function parse(AbstractStream $stream); |
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/** |
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* Associate given values to appropriate class properties. |
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* |
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* @param array $properties Associative array of properties values. |
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*/ |
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public function configure(array $properties) |
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{ |
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foreach ($properties as $name => $value) { |
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$methodName = 'set' . ucfirst(strtolower($name)); |
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if (method_exists($this, $methodName)) { |
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$this->$methodName($value); |
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} |
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} |
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} |
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/** |
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* Return DataSet instance from which this field take back linked values. |
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* |
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* @return DataSet DataSet corresponding this field. |
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*/ |
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public function getDataSet() |
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{ |
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return $this->dataSet; |
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} |
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/** |
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* Set to field DataSet instance for back links. |
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* |
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* @param DataSet $dataSet DataSet ro correspond to this field. |
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* @return self For chaining. |
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*/ |
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public function setDataSet(DataSet $dataSet) |
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{ |
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$this->dataSet = $dataSet; |
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return $this; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getAssert() |
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{ |
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return $this->assert; |
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} |
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/** |
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* @param mixed $assert |
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* @return $this |
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*/ |
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public function setAssert($assert) |
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{ |
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$this->assert = $assert; |
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return $this; |
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} |
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/** |
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* Check that given value is valid. |
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* |
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* @param $value mixed Checked value. |
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* @return true On success validation. |
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* @throws AssertException On assertion fail. |
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*/ |
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public function validate($value) |
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{ |
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$assert = $this->getAssert(); |
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if ($assert !== null) { |
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if (is_callable($assert)) { |
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if (!call_user_func($assert, $value, $this)) { |
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throw new AssertException( |
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sprintf('Custom validation fail with value (%s) "%s"', gettype($value), print_r($value, true)) |
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); |
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} |
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} else { |
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if ($value !== $assert) { |
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throw new AssertException( |
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sprintf( |
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'Failed asserting that actual value (%s) "%s" matches expected value (%s) "%s".', |
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gettype($value), |
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print_r($value, true), |
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gettype($assert), |
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print_r($assert, true) |
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) |
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); |
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} |
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} |
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} |
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return true; |
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} |
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/** |
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* Process, set and return given property. |
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* |
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* Find given property in DataSet if it was set as path string and return it. |
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* Otherwise already set value will be returned. |
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* |
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* @param string $name Property name. |
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* @return int|string|array|null Found or already set property value. |
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*/ |
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protected function resolveProperty($name) |
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{ |
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$value = $this->$name; |
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if (is_callable($value)) { |
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return call_user_func($value, $this); |
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} |
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return $this->resolveValue($value); |
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} |
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/** |
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* Find value in DataSet by given value if it is a path string. |
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* Otherwise given value will be returned. |
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* |
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* @param $value |
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* @return array|int|null|string |
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* @since 0.2 |
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*/ |
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private function resolveValue($value) |
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{ |
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if (DataSet::isPath($value)) { |
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if (empty($this->dataSet)) { |
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throw new ConfigurationException('DataSet is required to resole value by path.'); |
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} |
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$value = $this->dataSet->resolvePath($value); |
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} |
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if (is_array($value)) { |
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foreach ($value as $key => $subValue) { |
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$value[$key] = $this->resolveValue($subValue); |
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} |
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} |
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return $value; |
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} |
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} |
This check compares the return type specified in the
@return
annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch.