[RFC][LiveComponent] Add options on polling feature (max/multiplier)

[94noni]

Hi, I would like to know if a feature like that can be implemented (with ux live internal state/code)

If so, I would like to contribute if its accepted, any hint appreciated

https://symfony.com/bundles/ux-live-component/current/index.html#polling

<div
    {{ attributes }}
    data-poll="delay(500)|max(3)|$render"
>

as well, as this may open the way, perhaps a feature similar to messenger retry can be implemented ? (delay/max/multiplier)

Thanks,

[smnandre]

Seems interesting

Could you explain a bit more the feature, like how the max value would work, what "thing" the "retry" would handle / catch, etc etc ?

[94noni]

for the retry its not like the case of messenger for failure, but more the same config idea but here for an element
having a component that know how it needs to be refresh (poll) at which interval (delay) and until when (max)

each new polling will increment the max value until it reaches and no more add the poll
as well as having the delay configured and the multiplier to make it exponential (recent data are refreshed more frequently than old data)

the state of such config could be saved into the payload and handled back and fort between server and client I suppose

[smnandre]

I'm wondering if this should be a generic attribute, or if we should add a "ComponentWithTimerTrait" or something like this.

That sort of time manipulation is what i've been doing for the LiveMemory Timer component

ux/ux.symfony.com/templates/demos/live_memory/components/LiveMemory/Timer.html.twig

Lines 1 to 9 in dec3eb3

	<div {{ attributes.defaults({
	class: 'LiveMemory-Timer' ~ (this.blinking ? ' LiveMemory-Timer--blinking' : '')
	}) }}
	{% if this.remainingTime > (this.warningThreshold * 1000) %}
	data-poll="delay({{ this.remainingTime - (this.warningThreshold * 1000) }})|tick"
	{% elseif this.remainingTime > 0 %}
	data-poll="delay({{ this.remainingTime + 50 }})|tick"
	{% endif %}
	>

And i had in mind (before i forgot) to write about it and see if this could be improved / integrated in LiveComponent codebase

[94noni]

nice one, did know about such demo
i will have a look into it to get inspiration somehow
but yes this feature config can be controller on php side instead of twig side I agree

[smnandre]

Right now, i'm thinking delay/multiplier/etc seems very "retry" related for now.

But the overall "time / activity" management seem something we could/should be able to improve and offer (someone on slack recently wanted it's component to refresh when user reoopen tab, i remember an issue about page with live component needed to render at specific time, etc etc)

So maybe a way could be (thinking outloud here)

• add some JS code to handle "time" events on the browser part
• add some helper trait to ease DX for people with custom need

On the JS part we would need to handle some activity / page event we do not listen for now (device lock, freezes, background, user away, backward forward cache, etc etc)

On the PHP side we probably specific event listeners for time... but nothing much here except some required time functions i suppose.

In your case described in this issue: you would probably just need to add a trait and implement a method to compute the "next" polling time ... or something in that spirit.

What do you think ?

[94noni]

I think the helper on php side would be wise and relevant (aka a trait)
in order to config this behavior in a more granular way, and give more option on that poll feature

[94noni]

Closing for now as not much traction
I’ve taken inspiration on the démo timer code and adapted it for now (not so generic)