#Introduction

This snippet of code will callout to the ViaCEP API used to gather address information thru the postal code.

#Explanation

We are using a suffix trigger action, this will create a button on the right side of the input component and will trigger once clicked.

TextInput::make('postal_code')
    ->label('CEP')
    ->suffixAction(
        fn ($state, Closure $set) =>
            Action::make('search-action')
                ->icon('heroicon-o-search')
                ->action(function () use ($state, $set) {
                    if (blank($state)) {
                        Filament::notify('danger', 'Digite o CEP para buscar o endereço');
                        return;
                    }
 
                    try {
                        $cepData = Http::get("https://viacep.com.br/ws/{$state}/json/")
                            ->throw()
                            ->json();
                    } catch (RequestException $e) {
                        Filament::notify('danger', 'Erro ao buscar o endereço');
                        return;
                    }
 
                    $set('address_neighborhood', $cepData['bairro'] ?? null);
                    $set('address', $cepData['logradouro'] ?? null);
                    $set('city_id', City::where('title', $cepData['localidade'])->first()->id ?? null);
                    $set('state', State::where('letter', $cepData['uf'])->first()->id ?? null);
                })
    ),

Hope you enjoy! Happy coding.