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<?php
namespace Faker;
use Faker\Extension\Extension;
/**
* Proxy for other generators that returns only unique values.
*
* Instantiated through @see Generator::unique().
*
* @mixin Generator
*/
class UniqueGenerator
{
protected $generator;
protected $maxRetries;
/**
* Maps from method names to a map with serialized result keys.
*
* @example [
* 'phone' => ['0123' => null],
* 'city' => ['London' => null, 'Tokyo' => null],
* ]
*
* @var array<string, array<string, null>>
*/
protected $uniques = [];
/**
* @param Extension|Generator $generator
* @param int $maxRetries
* @param array<string, array<string, null>> $uniques
*/
public function __construct($generator, $maxRetries = 10000, &$uniques = [])
{
$this->generator = $generator;
$this->maxRetries = $maxRetries;
$this->uniques = &$uniques;
}
public function ext(string $id)
{
return new self($this->generator->ext($id), $this->maxRetries, $this->uniques);
}
/**
* Catch and proxy all generator calls but return only unique values
*
* @param string $attribute
*
* @deprecated Use a method instead.
*/
public function __get($attribute)
{
trigger_deprecation('fakerphp/faker', '1.14', 'Accessing property "%s" is deprecated, use "%s()" instead.', $attribute, $attribute);
return $this->__call($attribute, []);
}
/**
* Catch and proxy all generator calls with arguments but return only unique values
*
* @param string $name
* @param array $arguments
*/
public function __call($name, $arguments)
{
if (!isset($this->uniques[$name])) {
$this->uniques[$name] = [];
}
$i = 0;
do {
$res = call_user_func_array([$this->generator, $name], $arguments);
++$i;
if ($i > $this->maxRetries) {
throw new \OverflowException(sprintf('Maximum retries of %d reached without finding a unique value', $this->maxRetries));
}
} while (array_key_exists(serialize($res), $this->uniques[$name]));
$this->uniques[$name][serialize($res)] = null;
return $res;
}
}
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