Add LineItem CSV import and fix Unit API

app/Http/Controllers/InvoiceController.php

@@ -1,10 +1,12 @@
 <?php
+
 namespace App\Http\Controllers;
 
 use Inertia\Inertia;
 use App\Models\Invoice;
 use App\Models\LineItem;
 use App\Models\Setting;
+use App\Models\Unit;
 use App\Mail\Reminder;
 use App\Support\ApiDataTransformer;
 use Illuminate\Http\Request;
@@ -107,6 +109,16 @@ public static function single($id)
         ])->findOrFail($id);
 
         $invoiceArray = $invoice->toArray();
+
+        $unitIds = array_unique(array_column($invoiceArray['items'], 'unit_id'));
+        $units = Unit::whereIn('id', $unitIds)->get()->keyBy('id');
+        $invoiceArray['items'] = array_map(function ($item) use ($units) {
+            if (isset($item['unit_id']) && $units->has($item['unit_id'])) {
+                $item['unit'] = $units->get($item['unit_id'])->toArray();
+            }
+            return $item;
+        }, $invoiceArray['items']);
+
         $invoiceArray['customer']['payment_terms'] = $invoice->customer->paymentTerms->toArray();
         unset($invoiceArray['customer']['payment_terms_id']);
 
@@ -211,7 +223,9 @@ public function exportPdf($id)
             'isPDF' => true,
             'fontPath' => public_path('storage/fonts/'),
             'giroCode' => $giroCode,
-            'totalPages' => 1
+            'totalPages' => 1,
+            'companyName' => Setting::get('company.name'),
+            'companyAddress' => json_decode(Setting::get('company.address'), true)
         ];
 
         $options = [
@@ -476,7 +490,7 @@ public function store(Request $request)
             'items.*.title' => 'nullable|string',
             'items.*.description' => 'nullable|string',
             'items.*.quantity' => 'nullable|numeric',
-            'items.*.unit' => 'nullable|string',
+            'items.*.unitId' => 'nullable|integer',
             'items.*.price' => 'nullable|numeric',
         ]);
 
@@ -563,7 +577,7 @@ public function update(Request $request, $id)
             'items.*.title' => 'nullable|string',
             'items.*.description' => 'nullable|string',
             'items.*.quantity' => 'nullable|numeric',
-            'items.*.unit' => 'nullable|string',
+            'items.*.unitId' => 'nullable|integer',
             'items.*.price' => 'nullable|numeric',
         ]);
 
@@ -594,8 +608,8 @@ public function update(Request $request, $id)
             if (!empty($snakeCaseData['items'])) {
                 foreach ($snakeCaseData['items'] as $item) {
                     // Remove unit from item data if it's empty to let the database use the default value
-                    if (empty($item['unit'])) {
-                        unset($item['unit']);
+                    if (empty($item['unitId'])) {
+                        unset($item['unitId']);
                     }
                     if (isset($item['id']) && $item['id'] > 0) {
                         // Update existing item