Creating a Money custom field for Laravel Filament

money.blade.php

<x-dynamic-component
    :component="$getFieldWrapperView()"
    :id="$getId()"
    :label="$getLabel()"
    :label-sr-only="$isLabelHidden()"
    :helper-text="$getHelperText()"
    :hint="$getHint()"
    :hint-action="$getHintAction()"
    :hint-color="$getHintColor()"
    :hint-icon="$getHintIcon()"
    :required="$isRequired()"
    :state-path="$getStatePath()"
>


    {{--https://alpinejs.dev/plugins/mask--}}
    <div  class="filament-forms-text-input-component flex items-center space-x-2 rtl:space-x-reverse group"
          x-data="{ state: $wire.entangle('{{ $getStatePath() }}').defer }">
         <span class="whitespace-nowrap group-focus-within:text-primary-500 text-gray-400">
             @if ($label = $getPrefixLabel())
                 <span>{{ $label }}</span>
             @endif
         </span>
        <div class="flex-1">
            <input {!! $isDisabled() ? 'disabled' : null !!}
                   class="block w-full transition duration-75 border-gray-300 rounded-lg shadow-sm focus:border-primary-500 focus:ring-1 focus:ring-inset focus:ring-primary-500 disabled:opacity-70 dark:bg-gray-700 dark:text-white dark:focus:border-primary-500 dark:border-gray-600"
                   wire:model.defer="{{ $getStatePath() }}" placeholder="0,00" type="text"
                   x-mask:dynamic="$money($input, ',')" />
        </div>
    </div>
</x-dynamic-component>

Money.php

<?php

declare(strict_types=1);

namespace App\Forms\Components;

use Filament\Forms\Components\Concerns\HasAffixes;
use Filament\Forms\Components\Field;

class Money extends Field
{
    use HasAffixes;

    protected string $view = 'forms.components.money';
}

On your Resource Edit page (e.g. EditContract):

protected function mutateFormDataBeforeFill(array $data): array
    {
        $data['monthly_fee_in_cents'] = number_format($data['monthly_fee_in_cents']/100, 2, ',', '.');
        return $data;
    }

    protected function mutateFormDataBeforeSave(array $data): array
    {
        $data['monthly_fee_in_cents'] = preg_replace('/[ ,|.]+/', '', $data['monthly_fee_in_cents']);

        return $data;
    }

On the Create page:

protected function mutateFormDataBeforeCreate(array $data): array
     {
         $data['monthly_fee_in_cents'] = preg_replace('/[ ,|.]+/', '', $data['monthly_fee_in_cents']);

         return $data;
     }

README

This trick is based on Brazilian Phone Number field by Leandro C. Ferreira

IMPORTANT: in this example, the value is stored as integer on the DB.

1. Create new field
   php artisan make:form-field Money

2. Add Alpinejs Mask plugin on the boot method of your AppServiceProvider class

Filament::registerScripts([
                'https://unpkg.com/@alpinejs/mask@3.x.x/dist/cdn.min.js',
            ], true);

Usage

Money::make('monthly_fee_in_cents')
                ->label('Fee')
                ->prefix('€')
                ->required(),

Preview:

Exatamente o que eu tava procurando! Não achei nenhuma forma de dividir o valor por 100 antes de enviar pro inputText, vou tentar implementar aqui e vlw @sjardim !

ps: acho que tem um ")" extra na linha 28 do arquivo "money.blade.php" fora isso a máscara parece ter funcionado como deveria. Será que tem uma mais parecida com a $.mask do falecido jQuery, que ao digitar 1 ele já preenche 0.01?