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Code Editor : DebugMode.php

<?php
/**
 * 2007-2019 PrestaShop and Contributors
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://www.prestashop.com for more information.
 *
 * @author    PrestaShop SA <contact@prestashop.com>
 * @copyright 2007-2019 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * International Registered Trademark & Property of PrestaShop SA
 */

namespace PrestaShop\PrestaShop\Adapter\Debug;

use Tools;

/**
 * Utilitary class to manages the Debug mode legacy application.
 */
class DebugMode
{
    const DEBUG_MODE_SUCCEEDED = 0;
    const DEBUG_MODE_ERROR_NO_READ_ACCESS = 1;
    const DEBUG_MODE_ERROR_NO_READ_ACCESS_CUSTOM = 2;
    const DEBUG_MODE_ERROR_NO_WRITE_ACCESS = 3;
    const DEBUG_MODE_ERROR_NO_WRITE_ACCESS_CUSTOM = 4;
    const DEBUG_MODE_ERROR_NO_DEFINITION_FOUND = 5;

/**
     * Is Debug Mode enabled? Checks on custom defines file first.
     *
     * @return bool Whether debug mode is enabled
     */
    public function isDebugModeEnabled()
    {
        $definesClean = '';
        $customDefinesPath = _PS_ROOT_DIR_ . '/config/defines_custom.inc.php';
        $definesPath = _PS_ROOT_DIR_ . '/config/defines.inc.php';

if (is_readable($customDefinesPath)) {
            $definesClean = php_strip_whitespace($customDefinesPath);
        }

if (!preg_match('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', $definesClean, $debugModeValue)) {
            $definesClean = php_strip_whitespace($definesPath);
            if (!preg_match('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', $definesClean, $debugModeValue)) {
                return false;
            }
        }

return 'true' === Tools::strtolower($debugModeValue[1]);
    }

/**
     * Enable Debug mode.
     *
     * @return int Whether changing debug mode succeeded or error code
     */
    public function enable()
    {
        return $this->changePsModeDevValue('true');
    }

/**
     * Disable debug mode.
     *
     * @return int Whether changing debug mode succeeded or error code
     */
    public function disable()
    {
        return $this->changePsModeDevValue('false');
    }

/**
     * Check read permission on custom defines.inc.php.
     *
     * @return bool Whether the file can be read
     */
    private function isCustomDefinesReadable()
    {
        return is_readable(_PS_ROOT_DIR_ . '/config/defines_custom.inc.php');
    }

/**
     * Check read permission on main defines.inc.php.
     *
     * @return bool Whether the file can be read
     */
    private function isMainDefinesReadable()
    {
        return is_readable(_PS_ROOT_DIR_ . '/config/defines.inc.php');
    }

/**
     * Update Debug Mode value in main defines file.
     *
     * @param string $value should be "true" or "false"
     *
     * @return int the debug mode
     */
    private function updateDebugModeValueInMainFile($value)
    {
        $filename = _PS_ROOT_DIR_ . '/config/defines.inc.php';
        $cleanedFileContent = php_strip_whitespace($filename);
        $fileContent = Tools::file_get_contents($filename);

if (!preg_match('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', $cleanedFileContent)) {
            return self::DEBUG_MODE_ERROR_NO_DEFINITION_FOUND;
        }

$fileContent = preg_replace('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', 'define(\'_PS_MODE_DEV_\', ' . $value . ');', $fileContent);
        if (!@file_put_contents($filename, $fileContent)) {
            return self::DEBUG_MODE_ERROR_NO_WRITE_ACCESS;
        }

if (function_exists('opcache_invalidate')) {
            opcache_invalidate($filename);
        }

return self::DEBUG_MODE_SUCCEEDED;
    }

/**
     * Update Debug Mode value in custom defines file.
     *
     * @param string $value should be "true" or "false"
     *
     * @return int the debug mode
     */
    private function updateDebugModeValueInCustomFile($value)
    {
        $customFileName = _PS_ROOT_DIR_ . '/config/defines_custom.inc.php';
        $cleanedFileContent = php_strip_whitespace($customFileName);
        $fileContent = Tools::file_get_contents($customFileName);

if (!empty($cleanedFileContent) && preg_match('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', $cleanedFileContent)) {
            $fileContent = preg_replace('/define$\'_PS_MODE_DEV_\', ([a-zA-Z]+)$;/Ui', 'define(\'_PS_MODE_DEV_\', ' . $value . ');', $fileContent);

if (!@file_put_contents($customFileName, $fileContent)) {
                return self::DEBUG_MODE_ERROR_NO_WRITE_ACCESS_CUSTOM;
            }

if (function_exists('opcache_invalidate')) {
                opcache_invalidate($customFileName);
            }

return self::DEBUG_MODE_SUCCEEDED;
        }
    }

/**
     * Change value of _PS_MODE_DEV_ constant.
     *
     * @param string $value should be "true" or "false"
     *
     * @return int the debug mode
     */
    private function changePsModeDevValue($value)
    {
        // Check custom defines file first
        if ($this->isCustomDefinesReadable()) {
            return $this->updateDebugModeValueInCustomFile($value);
        }

if ($this->isMainDefinesReadable()) {
            return $this->updateDebugModeValueInMainFile($value);
        } else {
            return self::DEBUG_MODE_ERROR_NO_READ_ACCESS;
        }
    }
}

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Code Editor : DebugMode.php