duplicate feature

app/Traits/Incomes.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Traits;
+
+trait Incomes
+{
+
+    /**
+     * Generate next invoice number
+     *
+     * @return string
+     */
+    public function getNextInvoiceNumber()
+    {
+        $prefix = setting('general.invoice_number_prefix', 'INV-');
+        $next = setting('general.invoice_number_next', '1');
+        $digit = setting('general.invoice_number_digit', '5');
+
+        $number = $prefix . str_pad($next, $digit, '0', STR_PAD_LEFT);
+
+        return $number;
+    }
+
+    /**
+     * Increase the next invoice number
+     */
+    public function increaseNextInvoiceNumber()
+    {
+        // Update next invoice number
+        $next = setting('general.invoice_number_next', 1) + 1;
+        setting(['general.invoice_number_next' => $next]);
+        setting()->save();
+    }
+}