feat: send WhatsApp notification on sales invoice created

app/Http/Controllers/Sales/SalesInvoiceController.php

@@ -6,6 +6,7 @@ use App\Http\Controllers\Controller;
 use App\Models\Customer;
 use App\Models\SalesInvoice;
 use App\Models\SalesOrder;
+use App\Notifications\Sales\InvoiceCreatedNotification;
 use Illuminate\Http\Request;
 
 class SalesInvoiceController extends Controller
@@ -39,7 +40,7 @@ class SalesInvoiceController extends Controller
 
         $invoiceNumber = 'INV-' . str_pad(SalesInvoice::max('id') + 1, 5, '0', STR_PAD_LEFT);
 
-        SalesInvoice::create(array_merge($request->all(), [
+        $invoice = SalesInvoice::create(array_merge($request->all(), [
             'invoice_number' => $invoiceNumber,
             'status'         => 'unpaid',
             'paid_amount'    => 0,
@@ -48,6 +49,10 @@ class SalesInvoiceController extends Controller
 
         SalesOrder::where('id', $request->sales_order_id)->update(['status' => 'invoiced']);
 
+        if ($invoice->customer && $invoice->customer->whatsapp_number) {
+            $invoice->customer->notify(new InvoiceCreatedNotification($invoice));
+        }
+
         return redirect()->route('sales.invoices.index')->with('success', 'Invoice created successfully.');
     }
 

app/Notifications/Sales/InvoiceCreatedNotification.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Notifications\Sales;
+
+use App\Models\SalesInvoice;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Notifications\Notification;
+use PromoSeven\UltraMessage\UltraMessageChannel;
+use PromoSeven\UltraMessage\UltraMessageMessage;
+
+class InvoiceCreatedNotification extends Notification implements ShouldQueue
+{
+    use Queueable;
+
+    public function __construct(private SalesInvoice $invoice) {}
+
+    public function via(mixed $notifiable): array
+    {
+        return [UltraMessageChannel::class];
+    }
+
+    public function toUltraMessage(mixed $notifiable): UltraMessageMessage
+    {
+        return UltraMessageMessage::text(
+            "Dear {$notifiable->name},\n\nInvoice *#{$this->invoice->invoice_number}* is ready.\n\nAmount Due: {$this->invoice->total_amount}\nDue Date: {$this->invoice->due_date}\n\nPlease arrange payment at your earliest convenience. Thank you."
+        );
+    }
+}