Generate Invoice PDF and Send via Email

In a Filament resource, we have a simple form to enter details for the invoice.

app/Filament/Resources/InvoiceResource.php:

use Filament\Forms;
use Filament\Forms\Form;
 
public static function form(Form $form): Form
{
    return $form
        ->schema([
            Forms\Components\TextInput::make('customer_name')
                ->required(),
            Forms\Components\TextInput::make('customer_email')
                ->required(),
            Forms\Components\TextInput::make('product')
                ->required(),
            Forms\Components\TextInput::make('price')
                ->numeric()
                ->required(),
        ]);
}

Two models lifecycle events are used when a record is being creating and created. Within the creating event, a serial is generated, and after the record is created, a job to generate a PDF is dispatched.

app/Models/Invoice.php:

use App\Jobs\GenerateInvoice;
use Illuminate\Database\Eloquent\Model;
 
class Invoice extends Model
{
    // ...
 
    protected static function booted(): void
    {
        static::creating(function (Invoice $invoice) {
            $invoice->serial_number = str_pad((Invoice::max('serial_number') ?? 0) + 1, 5, '0', STR_PAD_LEFT);
            // ...

Next, we will handle the following:

• Automatically generating invoices using barryvdh/laravel-dompdf
• Adding Download and Send via Email buttons
• Sending the invoice to an email
• Storing invoices in local storage