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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\Facets\CriterionValue;
use ICanBoogie\ToArray;
/**
* Representation of a set of values, suitable for the SQL `IN()` function.
*
* A set of values is created by concatenating values with the pipe sign ("|") e.g. "1|2|3".
*/
class SetCriterionValue implements ToArray, \Countable
{
const SEPARATOR = '|';
/**
* Instantiate a {@link SetCriterionValue} instance from a value.
*
* @param mixed $value
*
* @return SetCriterionValue|null
*/
static public function from($value)
{
if (!$value)
{
return null;
}
if (is_array($value))
{
if (current($value) !== 'on')
{
return new static($value);
}
$set = array_keys($value);
}
else
{
$value = trim($value);
if ($value === self::SEPARATOR || strpos($value, self::SEPARATOR) === false)
{
return null;
}
$set = explode(self::SEPARATOR, $value);
}
$set = array_map('trim', $set);
$set = array_unique($set);
$set = array_values($set);
return new static($set);
}
protected $set;
public function __construct(array $set)
{
$this->set = $set;
}
/**
* Formats the set into a string.
*
* @return string
*/
public function __toString()
{
return implode(self::SEPARATOR, $this->set);
}
/**
* Returns the number of members in the set.
*
* @return int
*/
public function count()
{
return count($this->set);
}
/**
* Returns the set as an array.
*
* @return array
*/
public function to_array()
{
return $this->set;
}
}