feat: initial commit

app/Commands/Transmittal/GenerateTransmittalSeries.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Commands\Transmittal;
+
+use App\Commands\Command;
+use App\Models\Transmittal;
+use Illuminate\Database\Eloquent\Model;
+
+class GenerateTransmittalSeries implements Command
+{
+
+    public function execute(array $data): string
+    {
+        $lastSeries = Transmittal::query()->orderBy('id', 'desc')->first();
+
+        if ($lastSeries) {
+            $series = explode('-', $lastSeries->series)[1];
+            return  'TR-'.str_pad((int)$series + 1, 10, '0', STR_PAD_LEFT);
+        }
+
+        return $series = 'TR-'.str_pad(1, 10, '0', STR_PAD_LEFT);
+    }
+}