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Edit File: darklooks.php

<?php
/**
 * Plugin Name:       DarkLooks - Dark Mode Switcher For WordPress
 * Plugin URI:        https://enteraddon.com/darklooks/
 * Description:       A dark mode switching WordPress plugin with various settings.
 * Version:           1.0.7
 * Author:            ThemeLooks
 * Author URI:        https://themelooks.com
 * License:           GPL v2 or later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       darklooks
 * Domain Path:       /languages
 *
 */

// Constant for version 
if (!defined('DARKLOOKS_VERSION')) {
    define('DARKLOOKS_VERSION', '1.0.7');
}

// Set option name constant
if (!defined('DARKLOOKS_OPTION_NAME')) {
    define('DARKLOOKS_OPTION_NAME', 'darklooks_options');
}
// Constant for plugin dir path
if (!defined('DARKLOOKS_DIR_PATH')) {
    define('DARKLOOKS_DIR_PATH', trailingslashit(plugin_dir_path(__FILE__)));
}
// Constant for plugin dir url
if (!defined('DARKLOOKS_DIR_URL')) {
    define('DARKLOOKS_DIR_URL', trailingslashit(plugin_dir_url(__FILE__)));
}
// Constant for assets dir url
if (!defined('DARKLOOKS_DIR_ASSETS_URL')) {
    define('DARKLOOKS_DIR_ASSETS_URL', trailingslashit(DARKLOOKS_DIR_URL . 'assets'));
}
// Constant for admin dir path
if (!defined('DARKLOOKS_DIR_ADMIN')) {
    define('DARKLOOKS_DIR_ADMIN', trailingslashit(DARKLOOKS_DIR_PATH . 'admin'));
}

// Constant admin assets dir url
if (!defined('DARKLOOKS_DIR_ADMIN_ASSETS')) {
    define('DARKLOOKS_DIR_ADMIN_ASSETS', trailingslashit(DARKLOOKS_DIR_URL . 'admin/assets'));
}

// Include autoloader
require_once(DARKLOOKS_DIR_PATH . 'vendor/autoload.php');

final class Darklooks
{

private static $instance;

function __construct()
    {

// Plugin uninstall hook
        register_uninstall_hook(__FILE__, [__CLASS__, 'uninstallationFlag']);
        // Plugin activation hook
        register_activation_hook(__FILE__, [__CLASS__, 'flagOnPluginActivation']);
        //
        add_action('init', [$this, 'client_insights']);
        // Call setup method
        self::setup();
    }

public static function getInstance()
    {

if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;

}
    public static function setup()
    {
        self::createClassesInstance();
        self::objectInitialize();

}
    private static function objectInitialize()
    {
        // Class Enqueue
        new Darklooks\Inc\Enqueue();
        // Class Hooks
        Darklooks\Inc\Hooks::getHooked();
    }
    private static function createClassesInstance()
    {
        // Admin class instance
        new Darklooks\Admin\Admin();
    }

public static function flagOnPluginActivation()
    {

if (!empty(get_option(DARKLOOKS_OPTION_NAME))) {
            return;
        }

$setOption = [
            'frontend_darkopt' => 'yes',
            'darkmode_floating_switch' => 'yes',
            'mode_switch_style' => 'switcher1',
            'switcher_position' => 'bottom-right',
            'dark_method_type' => 'color_set',
            'dark_mode_color_type' => 'preset',
            'frontend_color_preset' => 'color1',
        ];

update_option(DARKLOOKS_OPTION_NAME, $setOption);

}

public static function uninstallationFlag()
    {
        delete_option(DARKLOOKS_OPTION_NAME);
    }

public function client_insights()
    {

if (!class_exists('Appsero\Client')) {
            require_once __DIR__ . '/appsero/src/Client.php';
        }

$client = new Appsero\Client('688a08c5-9741-4d74-9256-4be4c528bbe1', 'DarkLooks &#8211; Dark Mode Switcher For WordPress', __FILE__);

// Active insights
        $client->insights()->init();

}

/**
 *  Init DarkLooks
 */
Darklooks::getInstance();