Provide function that combines sleep() and timeout()

[lcobucci]

For an event-driven API with user interactions, I need to provide endpoints that delay the response for a while to wait for potential interactions and take an action once a timeout is reached.

I've implemented something in a possibly hacky way and believe it would be a potential feature for this lib:

namespace React\Promise\Timer;

use Closure;

use function React\Async\async;
use function React\Async\await;

/**
 * @param Closure():bool $stopCondition,
 * @param Closure():void $onTimeout
 */
function waitUntil(
    Closure $stopCondition,
    float $verificationInterval,
    Closure $onTimeout,
    float $timeout,
): void {
    try {
        $wait = async(static function () use ($stopCondition, $verificationInterval): void {
            while (! $stopCondition()) {
                await(sleep($verificationInterval)); // Timer\sleep() btw
            }
        });

        await(timeout($wait(), $timeout)); // Timer\timeout() btw
    } catch (TimeoutException) {
        $onTimeout();
    }
}

You certainly have ideas on how to turn this into a decent feature or just bin it.
I'm happy either way 😂

[SimonFrings]

Hey @lcobucci, already a win if this helps you with your project 👍

Whether this will be a new feature or not depends on how many people need this for their use cases. If there's a demand for this I can see this as a future addition to the project. ^^

[lcobucci]

I completely understand it, my goal was mostly sharing and/or picking your brains. That solution works for me, which is enough atm 😂

[SimonFrings]

Currently cleaning up some open tickets, doesn't seem there's currently much being discussed in here so I'll close this for now. We can still use this ticket for further discussion 👍