added import and export recurring bills

app/Imports/Purchases/Bills/Sheets/BillTransactions.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Imports\Purchases\Bills\Sheets;
+
+use App\Abstracts\Import;
+use App\Http\Requests\Banking\Transaction as Request;
+use App\Models\Banking\Transaction as Model;
+
+class BillTransactions extends Import
+{
+    public $request_class = Request::class;
+
+    public function model(array $row)
+    {
+        return new Model($row);
+    }
+
+    public function map($row): array
+    {
+        if ($this->isEmpty($row, 'bill_number')) {
+            return [];
+        }
+
+        $row['bill_number'] = (string) $row['bill_number'];
+
+        $row = parent::map($row);
+
+        $row['type'] = 'expense';
+        $row['account_id'] = $this->getAccountId($row);
+        $row['category_id'] = $this->getCategoryId($row, 'expense');
+        $row['contact_id'] = $this->getContactId($row, 'vendor');
+        $row['currency_code'] = $this->getCurrencyCode($row);
+        $row['document_id'] = $this->getDocumentId($row);
+        $row['number'] = $row['transaction_number'];
+
+        return $row;
+    }
+
+    public function prepareRules(array $rules): array
+    {
+        $rules['bill_number'] = 'required|string';
+
+        return $rules;
+    }
+}