Add validation to Accessories and Consumables to not let the user update the number of items to less than they already have checked out

app/Http/Controllers/Accessories/AccessoriesController.php

@@ -9,6 +9,7 @@ use App\Models\Accessory;
 use App\Models\Company;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Storage;
+use Illuminate\Support\Facades\Validator;
 use Redirect;
 
 /** This controller handles all actions related to Accessories for
@@ -130,6 +131,17 @@ class AccessoriesController extends Controller
             return redirect()->route('accessories.index')->with('error', trans('admin/accessories/message.does_not_exist'));
         }
 
+        $min = $accessory->numCHeckedOut();
+        $validator = Validator::make($request->all(), [
+            "qty" => "required|numeric|min:$min"
+        ]);
+
+        if ($validator->fails()) {
+            return redirect()->back()
+                ->withErrors($validator)
+                ->withInput();
+        }
+
         $this->authorize($accessory);
 
         // Update the accessory data

app/Http/Controllers/Consumables/ConsumablesController.php

@@ -9,6 +9,7 @@ use App\Models\Company;
 use App\Models\Consumable;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Input;
+use Illuminate\Support\Facades\Validator;
 
 /**
  * This controller handles all actions related to Consumables for
@@ -128,6 +129,17 @@ class ConsumablesController extends Controller
             return redirect()->route('consumables.index')->with('error', trans('admin/consumables/message.does_not_exist'));
         }
 
+        $min = $consumable->numCHeckedOut();
+        $validator = Validator::make($request->all(), [
+            "qty" => "required|numeric|min:$min"
+        ]);
+
+        if ($validator->fails()) {
+            return redirect()->back()
+                ->withErrors($validator)
+                ->withInput();
+        }
+
         $this->authorize($consumable);
 
         $consumable->name                   = $request->input('name');

app/Models/Accessory.php

@@ -310,6 +310,21 @@ class Accessory extends SnipeModel
             return null;
     }
 
+     /**
+     * Check how many items within an accessory are checked out
+     *
+     * @author [A. Gianotto] [<snipe@snipe.net>]
+     * @since [v5.0]
+     * @return int
+     */
+    public function numCheckedOut()
+    {
+        $checkedout = 0;
+        $checkedout = $this->users->count();
+
+        return $checkedout;
+    }
+
     /**
      * Check how many items of an accessory remain
      *

app/Models/Consumable.php

@@ -276,6 +276,21 @@ class Consumable extends SnipeModel
         }
     }
 
+    /**
+     * Check how many items within a consumable are checked out
+     *
+     * @author [A. Gianotto] [<snipe@snipe.net>]
+     * @since [v5.0]
+     * @return int
+     */
+    public function numCheckedOut()
+    {
+        $checkedout = 0;
+        $checkedout = $this->users->count();
+
+        return $checkedout;
+    }
+
     /**
      * Checks the number of available consumables
      *