Zabbix

<?php declare(strict_types = 0);

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

** See the GNU Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

namespace Widgets\ItemHistory\Actions;

​

use API,

    CController,

    CControllerResponseData;

​

class ValueCheck extends CController {

​

    private const VALUE_TYPE_IMAGE = 'image';

    private const VALUE_TYPE_RAW = 'raw';

​

    protected function init(): void {

        $this->disableCsrfValidation();

    }

​

    protected function checkPermissions(): bool {

        return $this->getUserType() >= USER_TYPE_ZABBIX_USER;

    }

​

    protected function checkInput(): bool {

        $fields = [

            'itemid' =>         'int32|required',

            'clock' =>          'int32|required',

            'ns' =>             'int32|required',

            'show_thumbnail' => 'in 1'

        ];

​

        $ret = $this->validateInput($fields);

​

        if (!$ret) {

            $this->setResponse(

                (new CControllerResponseData(['main_block' => json_encode([

                    'error' => [

                        'messages' => array_column(get_and_clear_messages(), 'message')

                    ]

                ], JSON_THROW_ON_ERROR)]))->disableView()

            );

        }

​

        return $ret;

    }

​

    protected function doAction(): void {

        $result = [];

​

        $db_item = API::Item()->get([

            'output' => ['itemid', 'value_type'],