out of stock notification

app/Http/Controllers/Auth/Users.php

@@ -203,4 +203,27 @@ class Users extends Controller
         // Redirect to invoices
         return redirect('incomes/invoices');
     }
+
+    /**
+     * Mark items out of stock notifications are read and redirect to items page.
+     *
+     * @param  User  $user
+     *
+     * @return Response
+     */
+    public function readItemsOutOfStock(User $user)
+    {
+        // Mark item notifications as read
+        foreach ($user->unreadNotifications as $notification) {
+            // Not an item notification
+            if ($notification->getAttribute('type') != 'App\Notifications\Item\Item') {
+                continue;
+            }
+
+            $notification->markAsRead();
+        }
+
+        // Redirect to items
+        return redirect('items/items');
+    }
 }

app/Http/Controllers/Expenses/Bills.php

@@ -153,6 +153,10 @@ class Bills extends Controller
                     $item_object = Item::find($item['item_id']);
 
                     $item_sku = $item_object->sku;
+
+                    // Increase stock (item bought)
+                    $item_object->quantity++;
+                    $item_object->save();
                 }
 
                 $tax = $tax_id = 0;

app/Http/Controllers/Incomes/Invoices.php

@@ -21,6 +21,7 @@ use App\Models\Setting\Category;
 use App\Models\Setting\Currency;
 use App\Models\Setting\Tax;
 use App\Notifications\Income\Invoice as Notification;
+use App\Notifications\Item\Item as ItemNotification;
 use App\Traits\Currencies;
 use App\Traits\DateTime;
 use App\Traits\Uploads;
@@ -161,6 +162,21 @@ class Invoices extends Controller
                     $item_object = Item::find($item['item_id']);
 
                     $item_sku = $item_object->sku;
+
+                    // Decrease stock (item sold)
+                    $item_object->quantity--;
+                    $item_object->save();
+
+                    // Notify users if out of stock
+                    if ($item_object->quantity == 0) {
+                        foreach ($item_object->company->users as $user) {
+                            if (!$user->can('read-notifications')) {
+                                continue;
+                            }
+
+                            $user->notify(new ItemNotification($item_object));
+                        }
+                    }
                 }
 
                 $tax = $tax_id = 0;