Working on gateway fees

app/Models/Traits/ChargesFees.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace App\Models\Traits;
+
+use App\Models\InvoiceItem;
+use App\Models\AccountGatewaySettings;
+
+/**
+ * Class ChargesFees
+ */
+trait ChargesFees
+{
+    public function calcGatewayFee($gatewayTypeId = false, $includeTax = true)
+    {
+        $settings = $this->account->getGatewaySettings($gatewayTypeId);
+        $fee = 0;
+
+        if (! $settings) {
+            return false;
+        }
+
+        if ($settings->fee_amount) {
+            $fee += $settings->fee_amount;
+        }
+
+        if ($settings->fee_percent) {
+            $amount = $this->amount;
+            if ($item = $this->getGatewayFeeItem()) {
+                $amount -= $item->amount();
+            }
+            $fee += $amount * $settings->fee_percent / 100;
+        }
+
+        if ($includeTax) {
+            $preTaxFee = $fee;
+
+            if ($settings->fee_tax_rate1) {
+                $fee += $preTaxFee * $settings->fee_tax_rate1 / 100;
+            }
+
+            if ($settings->fee_tax_rate2) {
+                $fee += $preTaxFee * $settings->fee_tax_rate2 / 100;
+            }
+        }
+
+        return round($fee, 2);
+    }
+
+    public function getGatewayFeeItem()
+    {
+        foreach ($this->invoice_items as $item) {
+            if ($item->invoice_item_type_id == INVOICE_ITEM_TYPE_GATEWAY_FEE) {
+                return $item;
+            }
+        }
+
+        return false;
+    }
+
+    public function getGatewayFee()
+    {
+        $item = $this->getGatewayFeeItem();
+
+        return $item ? $item->cost : 0;
+    }
+
+    public function setGatewayFee($gatewayTypeId)
+    {
+        $settings = $this->account->getGatewaySettings($gatewayTypeId);
+        $fee = $this->calcGatewayFee($gatewayTypeId);
+        $feePreTax = $this->calcGatewayFee($gatewayTypeId, false);
+        $item = $this->getGatewayFeeItem();
+
+        if ($fee == ($item ? $item->amount() : 0)) {
+            return;
+        }
+
+        if ($item) {
+            $this->amount -= $item->amount();
+            $this->balance -= $item->amount();
+            if (! $fee) {
+                $item->forceDelete();
+            }
+        }
+
+        if ($fee) {
+            $item = $item ?: InvoiceItem::createNew($this);
+            $item->invoice_item_type_id = INVOICE_ITEM_TYPE_GATEWAY_FEE;
+            $item->product_key = trans('texts.fee');
+            $item->notes = '';
+            $item->cost = $feePreTax;
+            $item->qty = 1;
+            $item->tax_rate1 = $settings->fee_tax_rate1;
+            $item->tax_name1 = $settings->fee_tax_name1;
+            $item->tax_rate2 = $settings->fee_tax_rate2;
+            $item->tax_name2 = $settings->fee_tax_name2;
+            $this->invoice_items()->save($item);
+        }
+
+        $this->amount += $fee;
+        $this->balance += $fee;
+        $this->save();
+    }
+}