Add function to fetch a single customer

app/Http/Controllers/CustomerController.php

@@ -4,6 +4,7 @@
 
 use App\Models\Customer;
 use App\Support\ApiDataTransformer;
+use Pest\ArchPresets\Custom;
 
 class CustomerController extends Controller
 {
@@ -21,6 +22,20 @@ public function index()
         });
     }
 
+    public function single($id)
+    {
+        $customer = Customer::with(['contacts' => function ($query) {
+            $query->orderBy('is_primary', 'desc');
+        }, 'paymentTerms'])->findOrFail($id);
+
+        $customerArray = $customer->toArray();
+        if ($customer->paymentTerms) {
+            $customerArray['payment_terms'] = $customer->paymentTerms->toArray();
+            unset($customerArray['payment_terms_id']);
+        }
+        return ApiDataTransformer::snakeToCamel($customerArray);
+    }
+
     /**
      * Generate a random available customer number
      */