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Dir : ~/usr/share/php/React/Promise/Internal/
View File Name : RejectedPromise.php

<?php

namespace React\Promise\Internal;

use React\Promise\PromiseInterface;
use function React\Promise\_checkTypehint;
use function React\Promise\resolve;
use function React\Promise\set_rejection_handler;

/**
 * @internal
 *
 * @template-implements PromiseInterface<never>
 */
final class RejectedPromise implements PromiseInterface
{
    /** @var \Throwable */
    private $reason;

    /** @var bool */
    private $handled = false;

    /**
     * @param \Throwable $reason
     */
    public function __construct(\Throwable $reason)
    {
        $this->reason = $reason;
    }

    /** @throws void */
    public function __destruct()
    {
        if ($this->handled) {
            return;
        }

        $handler = set_rejection_handler(null);
        if ($handler === null) {
            $message = 'Unhandled promise rejection with ' . $this->reason;

            \error_log($message);
            return;
        }

        try {
            $handler($this->reason);
        } catch (\Throwable $e) {
            \preg_match('/^([^:\s]++)(.*+)$/sm', (string) $e, $match);
            \assert(isset($match[1], $match[2]));
            $message = 'Fatal error: Uncaught ' . $match[1] . ' from unhandled promise rejection handler' . $match[2];

            \error_log($message);
            exit(255);
        }
    }

    /**
     * @template TRejected
     * @param ?callable $onFulfilled
     * @param ?(callable(\Throwable): (PromiseInterface<TRejected>|TRejected)) $onRejected
     * @return PromiseInterface<($onRejected is null ? never : TRejected)>
     */
    public function then(?callable $onFulfilled = null, ?callable $onRejected = null): PromiseInterface
    {
        if (null === $onRejected) {
            return $this;
        }

        $this->handled = true;

        try {
            return resolve($onRejected($this->reason));
        } catch (\Throwable $exception) {
            return new RejectedPromise($exception);
        }
    }

    /**
     * @template TThrowable of \Throwable
     * @template TRejected
     * @param callable(TThrowable): (PromiseInterface<TRejected>|TRejected) $onRejected
     * @return PromiseInterface<TRejected>
     */
    public function catch(callable $onRejected): PromiseInterface
    {
        if (!_checkTypehint($onRejected, $this->reason)) {
            return $this;
        }

        /**
         * @var callable(\Throwable):(PromiseInterface<TRejected>|TRejected) $onRejected
         */
        return $this->then(null, $onRejected);
    }

    public function finally(callable $onFulfilledOrRejected): PromiseInterface
    {
        return $this->then(null, function (\Throwable $reason) use ($onFulfilledOrRejected): PromiseInterface {
            return resolve($onFulfilledOrRejected())->then(function () use ($reason): PromiseInterface {
                return new RejectedPromise($reason);
            });
        });
    }

    public function cancel(): void
    {
        $this->handled = true;
    }

    /**
     * @deprecated 3.0.0 Use `catch()` instead
     * @see self::catch()
     */
    public function otherwise(callable $onRejected): PromiseInterface
    {
        return $this->catch($onRejected);
    }

    /**
     * @deprecated 3.0.0 Use `always()` instead
     * @see self::always()
     */
    public function always(callable $onFulfilledOrRejected): PromiseInterface
    {
        return $this->finally($onFulfilledOrRejected);
    }
}