add proformat and better default serial number prefix

config/invoices.php

@@ -5,6 +5,7 @@
 use Finller\Invoice\Invoice;
 use Finller\Invoice\InvoiceDiscount;
 use Finller\Invoice\InvoiceItem;
+use Finller\Invoice\InvoiceType;
 
 return [
 
@@ -39,7 +40,12 @@
          */
         'format' => 'PPYYCCCC',
 
-        'prefix' => 'IN',
+        'prefix' => [
+            InvoiceType::Invoice->value => 'IN',
+            InvoiceType::Quote->value => 'QO',
+            InvoiceType::Credit->value => 'CR',
+            InvoiceType::Proforma->value => 'PF',
+        ],
 
     ],
 

resources/lang/en/invoice.php

@@ -32,5 +32,6 @@
         'invoice' => 'Invoice',
         'quote' => 'Quote',
         'credit' => 'Credit note',
+        'proforma' => 'Proforma invoice',
     ],
 ];

resources/lang/fr/invoice.php

@@ -32,5 +32,6 @@
         'invoice' => 'Facture',
         'quote' => 'Devis',
         'credit' => "Facture d'avoir",
+        'proforma' => 'Facture Proforma',
     ],
 ];

src/Invoice.php

@@ -232,9 +232,25 @@ public function setSerialNumberDate(Carbon $value): static
         return $this;
     }
 
+    /**
+     * Retrieve the matching prefix according to the invoice type
+     */
+    public function getSerialNumberPrefixFromConfig(string $default = ''): string
+    {
+        /** @var string|array $prefixes */
+        $prefixes = config('invoices.serial_number.prefix', '');
+
+        if (is_string($prefixes)) {
+            return $prefixes;
+        }
+
+        return data_get($prefixes, $this->type?->value, $default);
+    }
+
     public function getSerialNumberPrefix(): ?string
     {
-        return data_get($this->serial_number_details, 'prefix', config('invoices.serial_number.prefix'));
+
+        return data_get($this->serial_number_details, 'prefix', $this->getSerialNumberPrefixFromConfig());
     }
 
     public function getSerialNumberSerie(): ?int

src/InvoiceType.php

@@ -7,13 +7,15 @@ enum InvoiceType: string
     case Invoice = 'invoice';
     case Quote = 'quote';
     case Credit = 'credit';
+    case Proforma = 'proforma';
 
     public function trans()
     {
         return match ($this) {
             self::Invoice => __('invoices::invoice.types.invoice'),
             self::Quote => __('invoices::invoice.types.quote'),
             self::Credit => __('invoices::invoice.types.credit'),
+            self::Proforma => __('invoices::invoice.types.proforma'),
         };
     }
 }

src/SerialNumberGenerator.php

@@ -9,7 +9,6 @@ public function __construct(
         public ?string $prefix = null,
     ) {
         $this->format = $format ?? config('invoices.serial_number.format', '');
-        $this->prefix = $prefix ?? config('invoices.serial_number.prefix', '');
     }
 
     public function generate(