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<?php |
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/** |
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* Particle. |
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* |
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* @link http://github.com/particle-php for the canonical source repository |
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* @copyright Copyright (c) 2005-2015 Particle (http://particle-php.com) |
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* @license https://github.com/particle-php/validator/blob/master/LICENSE New BSD License |
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*/ |
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namespace Particle\Validator\Rule; |
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use Particle\Validator\StringifyCallbackTrait; |
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use Particle\Validator\Rule; |
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use Particle\Validator\Value\Container; |
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/** |
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* This class is responsible for checking if a certain key has a value. |
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* |
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* @package Particle\Validator\Rule |
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*/ |
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class NotEmpty extends Rule |
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{ |
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use StringifyCallbackTrait; |
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/** |
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* The error code for when a value is empty while this is not allowed. |
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*/ |
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const EMPTY_VALUE = 'NotEmpty::EMPTY_VALUE'; |
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/** |
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* The templates for the possible messages this validator can return. |
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* |
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* @var array |
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*/ |
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protected $messageTemplates = [ |
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self::EMPTY_VALUE => '{{ name }} must not be empty', |
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]; |
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/** |
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* Denotes whether or not the chain should be stopped after this rule. |
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* |
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* @var bool |
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*/ |
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protected $shouldBreak; |
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/** |
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* Indicates if the value can be empty. |
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* |
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* @var bool |
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*/ |
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protected $allowEmpty; |
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/** |
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* Optionally contains a callable to overwrite the allow empty requirement on time of validation. |
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* |
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* @var callable |
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*/ |
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protected $allowEmptyCallback; |
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/** |
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* Contains the input container. |
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* |
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* @var Container |
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*/ |
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protected $input; |
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/** |
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* Construct the NotEmpty validator. |
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* |
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* @param bool $allowEmpty |
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*/ |
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public function __construct($allowEmpty) |
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{ |
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$this->allowEmpty = (bool) $allowEmpty; |
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} |
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/** |
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* @return bool |
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*/ |
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public function shouldBreakChain() |
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{ |
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return $this->shouldBreak; |
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} |
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/** |
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* Ensures a certain key has a value. |
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* |
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* @param mixed $value |
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* @return bool |
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*/ |
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public function validate($value) |
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{ |
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if ($this->isEmpty($value)) { |
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$this->shouldBreak = true; |
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return !$this->allowEmpty($this->input) ? $this->error(self::EMPTY_VALUE) : true; |
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} |
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return true; |
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} |
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/** |
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* Determines whether or not value $value is to be considered "empty". |
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* |
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* @param mixed $value |
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* @return bool |
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*/ |
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protected function isEmpty($value) |
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{ |
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if (is_string($value) && strlen($value) === 0) { |
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return true; |
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} elseif ($value === null) { |
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return true; |
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} elseif (is_array($value) && count($value) === 0) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @inheritdoc |
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* |
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* @param string $key |
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* @param Container $input |
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* @return bool |
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*/ |
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public function isValid($key, Container $input) |
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{ |
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$this->input = $input; |
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return $this->validate($input->get($key)); |
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} |
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/** |
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* Set a callable or boolean value to potentially alter the allow empty requirement at the time of validation. |
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* |
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* This may be incredibly useful for conditional validation. |
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* |
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* @param callable|bool $allowEmpty |
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* @return $this |
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*/ |
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public function setAllowEmpty($allowEmpty) |
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{ |
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if (is_callable($allowEmpty)) { |
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return $this->setAllowEmptyCallback($allowEmpty); |
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} |
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return $this->overwriteAllowEmpty($allowEmpty); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function getMessageParameters() |
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{ |
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return array_merge(parent::getMessageParameters(), [ |
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'allowEmpty' => $this->allowEmpty, |
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'callback' => $this->getCallbackAsString($this->allowEmptyCallback) |
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]); |
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} |
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/** |
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* Overwrite the allow empty requirement after instantiation of this rule. |
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* |
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* @param bool $allowEmpty |
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* @return $this |
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*/ |
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protected function overwriteAllowEmpty($allowEmpty) |
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{ |
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$this->allowEmpty = $allowEmpty; |
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return $this; |
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} |
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/** |
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* Set the callback to execute to determine whether or not the rule should allow empty. |
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* |
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* @param callable $allowEmptyCallback |
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* @return $this |
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*/ |
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protected function setAllowEmptyCallback(callable $allowEmptyCallback) |
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{ |
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$this->allowEmptyCallback = $allowEmptyCallback; |
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return $this; |
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} |
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/** |
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* Determines whether or not the value may be empty. |
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* |
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* @param Container $input |
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* @return bool |
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*/ |
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protected function allowEmpty(Container $input) |
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{ |
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if (isset($this->allowEmptyCallback)) { |
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$this->allowEmpty = call_user_func($this->allowEmptyCallback, $input->getArrayCopy()); |
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} |
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return $this->allowEmpty; |
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} |
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} |
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