Flarum\Core\Command\EditUserHandler::handle PHP Method

    public function handle(EditUser $command)
    {
        $actor = $command->actor;
        $data = $command->data;
        $user = $this->users->findOrFail($command->userId, $actor);
        $canEdit = $actor->can('edit', $user);
        $isSelf = $actor->id === $user->id;
        $attributes = array_get($data, 'attributes', []);
        $relationships = array_get($data, 'relationships', []);
        $validate = [];
        if (isset($attributes['username'])) {
            $this->assertPermission($canEdit);
            $user->rename($attributes['username']);
        }
        if (isset($attributes['email'])) {
            if ($isSelf) {
                $user->requestEmailChange($attributes['email']);
                if ($attributes['email'] !== $user->email) {
                    $validate['email'] = $attributes['email'];
                }
            } else {
                $this->assertPermission($canEdit);
                $user->changeEmail($attributes['email']);
            }
        }
        if ($actor->isAdmin() && !empty($attributes['isActivated'])) {
            $user->activate();
        }
        if (isset($attributes['password'])) {
            $this->assertPermission($canEdit);
            $user->changePassword($attributes['password']);
            $validate['password'] = $attributes['password'];
        }
        if (isset($attributes['bio'])) {
            if (!$isSelf) {
                $this->assertPermission($canEdit);
            }
            $user->changeBio($attributes['bio']);
        }
        if (!empty($attributes['readTime'])) {
            $this->assertPermission($isSelf);
            $user->markAllAsRead();
        }
        if (!empty($attributes['preferences'])) {
            $this->assertPermission($isSelf);
            foreach ($attributes['preferences'] as $k => $v) {
                $user->setPreference($k, $v);
            }
        }
        if (isset($relationships['groups']['data']) && is_array($relationships['groups']['data'])) {
            $this->assertPermission($canEdit);
            $newGroupIds = [];
            foreach ($relationships['groups']['data'] as $group) {
                if ($id = array_get($group, 'id')) {
                    $newGroupIds[] = $id;
                }
            }
            $user->raise(new UserGroupsWereChanged($user, $user->groups()->get()->all()));
            $user->afterSave(function (User $user) use($newGroupIds) {
                $user->groups()->sync($newGroupIds);
            });
        }
        $this->events->fire(new UserWillBeSaved($user, $actor, $data));
        $this->validator->setUser($user);
        $this->validator->assertValid(array_merge($user->getDirty(), $validate));
        $user->save();
        $this->dispatchEventsFor($user, $actor);
        return $user;
    }