add staff remove & staff invite test

app/Http/Controllers/EventController.php

@@ -110,7 +110,17 @@ class EventController extends Controller
 
         $this->authorize('delete', $event);
 
-        $event->guests()->updateExistingPivot($user, array('is_staff' => 1), false);
+        $event->guests()->updateExistingPivot($user, ['is_staff' => true], false);
+
+        return (new EventResource($event))
+            ->response()
+            ->setStatusCode(200);
+    }
+
+    public function deleteGuestToStaffEvent(Event $event, User $user) {
+        $this->authorize('delete', $event);
+
+        $event->guests()->updateExistingPivot($user, ['is_staff' => false], false);
 
         return (new EventResource($event))
             ->response()

app/Http/Resources/User.php

@@ -28,7 +28,7 @@ class User extends JsonResource
                     'last_login' => optional($this->login_at)->diffForHumans(),
                     'is_admin' => $this->isAdmin(),
                     'is_staff' => $this->whenPivotLoaded('event_guest', function() {
-                        return $this->pivot->is_staff;
+                        return (int) $this->pivot->is_staff;
                     }),
                 ],
             ],

app/Models/User.php

@@ -115,7 +115,7 @@ class User extends Authenticatable
 
     public function invitedEvent(): BelongsToMany
     {
-        return $this->belongsToMany(Event::class, 'event_guest')
+        return $this->belongsToMany(Event::class, 'event_guest', 'user_id', 'event_id')
             ->withPivot('is_staff', 'validated_at')
             ->withTimestamps();
     }

app/Policies/EventPolicy.php

@@ -53,7 +53,15 @@ class EventPolicy
      */
     public function update(User $user, Event $event)
     {
-        return $user->id == $event->user_id;
+        if($user->id == $event->user_id) {
+            return true;
+        } else {
+            $testedUser = $event->guests()->where('users.id', $user->id)->first();
+            if($testedUser !== null) {
+                return $testedUser->pivot->is_staff;
+            }
+        }
+        return false;
     }
 
     /**