CORE_V5 // SupportComputed

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Editing: BaseComputed.php

<?php

namespace Livewire\Features\SupportComputed;

use function Livewire\invade;
use function Livewire\on;
use function Livewire\off;

use Livewire\Features\SupportAttributes\Attribute;
use Illuminate\Support\Facades\Cache;

#[\Attribute]
class BaseComputed extends Attribute
{
    protected $requestCachedValue;

function __construct(
        public $persist = false,
        public $seconds = 3600, // 1 hour...
        public $cache = false,
        public $key = null,
        public $tags = null,
    ) {}

function boot()
    {
        off('__get', $this->handleMagicGet(...));
        on('__get', $this->handleMagicGet(...));

off('__unset', $this->handleMagicUnset(...));
        on('__unset', $this->handleMagicUnset(...));
    }

function call()
    {
        throw new CannotCallComputedDirectlyException(
            $this->component->getName(),
            $this->getName(),
        );
    }

protected function handleMagicGet($target, $property, $returnValue)
    {
        if ($target !== $this->component) return;
        if ($this->generatePropertyName($property) !== $this->getName()) return;

if ($this->persist) {
            $returnValue($this->handlePersistedGet());

return;
        }

if ($this->cache) {
            $returnValue($this->handleCachedGet());

return;
        }

$returnValue(
            $this->requestCachedValue ??= $this->evaluateComputed()
        );
    }

protected function handleMagicUnset($target, $property)
    {
        if ($target !== $this->component) return;
        if ($property !== $this->getName()) return;

if ($this->persist) {
            $this->handlePersistedUnset();

return;
        }

if ($this->cache) {
            $this->handleCachedUnset();

return;
        }

unset($this->requestCachedValue);
    }

protected function handlePersistedGet()
    {
        $key = $this->generatePersistedKey();

$closure = fn () => $this->evaluateComputed();

return match(Cache::supportsTags() && !empty($this->tags)) {
            true => Cache::tags($this->tags)->remember($key, $this->seconds, $closure),
            default => Cache::remember($key, $this->seconds, $closure)
        };
    }

protected function handleCachedGet()
    {
        $key = $this->generateCachedKey();

$closure = fn () => $this->evaluateComputed();

protected function handlePersistedUnset()
    {
        $key = $this->generatePersistedKey();

Cache::forget($key);
    }

protected function handleCachedUnset()
    {
        $key = $this->generateCachedKey();

Cache::forget($key);
    }

protected function generatePersistedKey()
    {
        if ($this->key) return $this->key;

return 'lw_computed.'.$this->component->getId().'.'.$this->getName();
    }

protected function generateCachedKey()
    {
        if ($this->key) return $this->key;

return 'lw_computed.'.$this->component->getName().'.'.$this->getName();
    }

protected function evaluateComputed()
    {
        return invade($this->component)->{parent::getName()}();
    }

public function getName()
    {
        return $this->generatePropertyName(parent::getName());
    }

private function generatePropertyName($value)
    {
        return str($value)->camel()->toString();
    }

}

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