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<?php
/**
* @see https://github.com/zendframework/zend-validator for the canonical source repository
* @copyright Copyright (c) 2017 Zend Technologies USA Inc. (http://www.zend.com)
* @license https://github.com/zendframework/zend-validator/blob/master/LICENSE.md New BSD License
*/
namespace Zend\Validator;
use Countable;
/**
* Validate that a value is countable and the count meets expectations.
*
* The validator has five specific behaviors:
*
* - You can determine if a value is countable only
* - You can test if the value is an exact count
* - You can test if the value is greater than a minimum count value
* - You can test if the value is greater than a maximum count value
* - You can test if the value is between the minimum and maximum count values
*
* When creating the instance or calling `setOptions()`, if you specify a
* "count" option, specifying either "min" or "max" leads to an inconsistent
* state and, as such will raise an Exception\InvalidArgumentException.
*/
class IsCountable extends AbstractValidator
{
const NOT_COUNTABLE = 'notCountable';
const NOT_EQUALS = 'notEquals';
const GREATER_THAN = 'greaterThan';
const LESS_THAN = 'lessThan';
/**
* Validation failure message template definitions
*
* @var array
*/
protected $messageTemplates = [
self::NOT_COUNTABLE => "The input must be an array or an instance of \\Countable",
self::NOT_EQUALS => "The input count must equal '%count%'",
self::GREATER_THAN => "The input count must be less than '%max%', inclusively",
self::LESS_THAN => "The input count must be greater than '%min%', inclusively",
];
/**
* Additional variables available for validation failure messages
*
* @var array
*/
protected $messageVariables = [
'count' => ['options' => 'count'],
'min' => ['options' => 'min'],
'max' => ['options' => 'max'],
];
/**
* Options for the between validator
*
* @var array
*/
protected $options = [
'count' => null,
'min' => null,
'max' => null,
];
public function setOptions($options = [])
{
foreach (['count', 'min', 'max'] as $option) {
if (! is_array($options) || ! isset($options[$option])) {
continue;
}
$method = sprintf('set%s', ucfirst($option));
$this->$method($options[$option]);
unset($options[$option]);
}
return parent::setOptions($options);
}
/**
* Returns true if and only if $value is countable (and the count validates against optional values).
*
* @param iterable $value
* @return bool
*/
public function isValid($value)
{
if (! (is_array($value) || $value instanceof Countable)) {
$this->error(self::NOT_COUNTABLE);
return false;
}
$count = count($value);
if (is_numeric($this->getCount())) {
if ($count != $this->getCount()) {
$this->error(self::NOT_EQUALS);
return false;
}
return true;
}
if (is_numeric($this->getMax()) && $count > $this->getMax()) {
$this->error(self::GREATER_THAN);
return false;
}
if (is_numeric($this->getMin()) && $count < $this->getMin()) {
$this->error(self::LESS_THAN);
return false;
}
return true;
}
/**
* Returns the count option
*
* @return mixed
*/
public function getCount()
{
return $this->options['count'];
}
/**
* Returns the min option
*
* @return mixed
*/
public function getMin()
{
return $this->options['min'];
}
/**
* Returns the max option
*
* @return mixed
*/
public function getMax()
{
return $this->options['max'];
}
/**
* @param mixed $value
* @return void
* @throws Exception\InvalidArgumentException if either a min or max option
* was previously set.
*/
private function setCount($value)
{
if (isset($this->options['min']) || isset($this->options['max'])) {
throw new Exception\InvalidArgumentException(
'Cannot set count; conflicts with either a min or max option previously set'
);
}
$this->options['count'] = $value;
}
/**
* @param mixed $value
* @return void
* @throws Exception\InvalidArgumentException if either a count or max option
* was previously set.
*/
private function setMin($value)
{
if (isset($this->options['count'])) {
throw new Exception\InvalidArgumentException(
'Cannot set count; conflicts with either a count option previously set'
);
}
$this->options['min'] = $value;
}
/**
* @param mixed $value
* @return void
* @throws Exception\InvalidArgumentException if either a count or min option
* was previously set.
*/
private function setMax($value)
{
if (isset($this->options['count'])) {
throw new Exception\InvalidArgumentException(
'Cannot set count; conflicts with either a count option previously set'
);
}
$this->options['max'] = $value;
}
}
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