String Trimming For Livewire

HandlesStringTrimming.php

<?php

namespace App\Livewire;

use App\Livewire\Attributes\DontTrim;
use App\Livewire\Attributes\Trim;

trait HandlesStringTrimming
{
    public bool $trimsAllStrings = true;

    public array $stringTrimInclusions = [];

    public array $stringTrimExclusions = [];

    public function mountHandlesStringTrimming(): void
    {
        $reflection = new \ReflectionClass($this);

        $properties = $reflection->getProperties();
        foreach ($properties as $property) {
            $propertyName = $property->getName();

            $propertyAttributes = $property->getAttributes(DontTrim::class);
            if (count($propertyAttributes) > 0) {
                $this->stringTrimExclusions[] = $propertyName;
            } else {
                $propertyAttributes = $property->getAttributes(Trim::class);
                if (count($propertyAttributes) > 0) {
                    $this->stringTrimInclusions[] = $propertyName;
                    $this->trimsAllStrings = false;
                }
            }
        }
    }

    public function updatedHandlesStringTrimming($property): void
    {
        $propertyPrefix = str($property)->before('.')->toString();

        if (
            ($this->trimsAllStrings && ! in_array($propertyPrefix, $this->stringTrimExclusions)) ||
            (! $this->trimsAllStrings && in_array($propertyPrefix, $this->stringTrimInclusions))
        ) {

            if (! $this->isTrimmableType($property)) {
                return;
            }

            $value = $this->getPropertyValue($property);
            $this->fill([$property => preg_replace('~^[\s\x{FEFF}\x{200B}]+|[\s\x{FEFF}\x{200B}]+$~u', '', $value) ?? trim($value)]);
        }
    }

    protected function isTrimmableType($property): bool
    {
        if (str($property)->contains('.')) {
            $propertyName = str($property)->afterLast('.');
            $objectName = str($property)->beforeLast('.');

            $object = data_get($this, $objectName, null);

            if (is_object($object)) {
                $ref = new \ReflectionProperty($object, (string) $propertyName);
            } else {
                $ref = null;
            }
        } else {
            $ref = new \ReflectionProperty($this, (string) $property);
        }

        if (! $ref || ! $ref->getType() || $ref->getType()->getName() !== 'string') {
            return false;
        }

        return true;
    }
}

The Trim and DontTrim attributes are very similar:

<?php

namespace App\Livewire\Attributes;

use Livewire\Attribute as LivewireAttribute;

#[\Attribute]
class Trim extends LivewireAttribute
{
    //
}

<?php

namespace App\Livewire\Attributes;

use Livewire\Attribute as LivewireAttribute;

#[\Attribute]
class DontTrim extends LivewireAttribute
{
    //
}

This trait will auto-trim on every update everything that can be trimmed.

If you want to limit it, you can leverage property attributes:

1. #[Trim] and nothing will be trimmed except for those properties with the attribute.
2. #[DontTrim] and everything will be trimmed except for those properties with the attribute.