Developer
<?php
namespace Illuminate\Support;
use RuntimeException;
class Lottery
{
/**
* The number of expected wins.
*
* @var int|float
*/
protected $chances;
/**
* The number of potential opportunities to win.
*
* @var int|null
*/
protected $outOf;
/**
* The winning callback.
*
* @var null|callable
*/
protected $winner;
/**
* The losing callback.
*
* @var null|callable
*/
protected $loser;
/**
* The factory that should be used to generate results.
*
* @var callable|null
*/
protected static $resultFactory;
/**
* Create a new Lottery instance.
*
* @param int|float $chances
* @param int|null $outOf
* @return void
*/
public function __construct($chances, $outOf = null)
{
if ($outOf === null && is_float($chances) && $chances > 1) {
throw new RuntimeException('Float must not be greater than 1.');
}
$this->chances = $chances;
$this->outOf = $outOf;
}
/**
* Create a new Lottery instance.
*
* @param int|float $chances
* @param int|null $outOf
* @return static
*/
public static function odds($chances, $outOf = null)
{
return new static($chances, $outOf);
}
/**
* Set the winner callback.
*
* @param callable $callback
* @return $this
*/
public function winner($callback)
{
$this->winner = $callback;
return $this;
}
/**
* Set the loser callback.
*
* @param callable $callback
* @return $this
*/
public function loser($callback)
{
$this->loser = $callback;
return $this;
}
/**
* Run the lottery.
*
* @param mixed ...$args
* @return mixed
*/
public function __invoke(...$args)
{
return $this->runCallback(...$args);
}
/**
* Run the lottery.
*
* @param null|int $times
* @return mixed
*/
public function choose($times = null)
{
if ($times === null) {
return $this->runCallback();
}
$results = [];
for ($i = 0; $i < $times; $i++) {
$results[] = $this->runCallback();
}
return $results;
}
/**
* Run the winner or loser callback, randomly.
*
* @param mixed ...$args
* @return callable
*/
protected function runCallback(...$args)
{
return $this->wins()
? ($this->winner ?? fn () => true)(...$args)
: ($this->loser ?? fn () => false)(...$args);
}
/**
* Determine if the lottery "wins" or "loses".
*
* @return bool
*/
protected function wins()
{
return static::resultFactory()($this->chances, $this->outOf);
}
/**
* The factory that determines the lottery result.
*
* @return callable
*/
protected static function resultFactory()
{
return static::$resultFactory ?? fn ($chances, $outOf) => $outOf === null
? random_int(0, PHP_INT_MAX) / PHP_INT_MAX <= $chances
: random_int(1, $outOf) <= $chances;
}
/**
* Force the lottery to always result in a win.
*
* @param callable|null $callback
* @return void
*/
public static function alwaysWin($callback = null)
{
self::setResultFactory(fn () => true);
if ($callback === null) {
return;
}
$callback();
static::determineResultNormally();
}
/**
* Force the lottery to always result in a lose.
*
* @param callable|null $callback
* @return void
*/
public static function alwaysLose($callback = null)
{
self::setResultFactory(fn () => false);
if ($callback === null) {
return;
}
$callback();
static::determineResultNormally();
}
/**
* Set the sequence that will be used to determine lottery results.
*
* @param array $sequence
* @param callable|null $whenMissing
* @return void
*/
public static function fix($sequence, $whenMissing = null)
{
return static::forceResultWithSequence($sequence, $whenMissing);
}
/**
* Set the sequence that will be used to determine lottery results.
*
* @param array $sequence
* @param callable|null $whenMissing
* @return void
*/
public static function forceResultWithSequence($sequence, $whenMissing = null)
{
$next = 0;
$whenMissing ??= function ($chances, $outOf) use (&$next) {
$factoryCache = static::$resultFactory;
static::$resultFactory = null;
$result = static::resultFactory()($chances, $outOf);
static::$resultFactory = $factoryCache;
$next++;
return $result;
};
static::setResultFactory(function ($chances, $outOf) use (&$next, $sequence, $whenMissing) {
if (array_key_exists($next, $sequence)) {
return $sequence[$next++];
}
return $whenMissing($chances, $outOf);
});
}
/**
* Indicate that the lottery results should be determined normally.
*
* @return void
*/
public static function determineResultNormally()
{
static::$resultFactory = null;
}
/**
* Set the factory that should be used to determine the lottery results.
*
* @param callable $factory
* @return void
*/
public static function setResultFactory($factory)
{
self::$resultFactory = $factory;
}
}
Developer
If you encounter any issues or need assistance, please reach out to our dedicated developer support team Contact Us
Thank you for choosing Kueue Pay Payment Gateway Solutions! We look forward to seeing your integration thrive and provide a seamless payment experience for your valued customers.