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Edit File: functions.php

<?php
/**
 * ONUM functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package ONUM
 */

if ( ! function_exists( 'onum_setup' ) ) :
	/**
	 * Sets up theme defaults and registers support for various WordPress features.
	 *
	 * Note that this function is hooked into the after_setup_theme hook, which
	 * runs before the init hook. The init hook is too late for some features, such
	 * as indicating support for post thumbnails.
	 */
	function onum_setup() {
		/*
		 * Make theme available for translation.
		 * Translations can be filed in the /languages/ directory.
		 * If you're building a theme based on _s, use a find and replace
		 * to change 'onum' to the name of your theme in all the template files.
		 */
		load_theme_textdomain( 'onum', get_template_directory() . '/languages' );

// Add default posts and comments RSS feed links to head.
		add_theme_support( 'automatic-feed-links' );

/*
		 * Let WordPress manage the document title.
		 * By adding theme support, we declare that this theme does not use a
		 * hard-coded <title> tag in the document head, and expect WordPress to
		 * provide it for us.
		 */
		add_theme_support( 'title-tag' );

/*
		 * Enable support for Post Thumbnails on posts and pages.
		 *
		 * @link https://developer.wordpress.org/themes/functionality/featured-images-post-thumbnails/
		 */
		add_theme_support( 'post-thumbnails' );

// This theme uses wp_nav_menu() in one location.
		register_nav_menus( array(
			'primary' => esc_html__( 'Primary', 'onum' ),
		) );

/*
		 * Switch default core markup for search form, comment form, and comments
		 * to output valid HTML5.
		 */
		add_theme_support( 'html5', array(
			'search-form',
			'comment-form',
			'comment-list',
			'gallery',
			'caption',
		) );

/*
		 * Enable support for Post Formats.
		 *
		 * See: https://codex.wordpress.org/Post_Formats
		 */
		add_theme_support( 'post-formats', array(
			'image',
			'video',
			'quote',
			'gallery',
			'audio',
			'link',
		) );

/* Add image sizes 
		* x_crop_position accepts ‘left’ ‘center’, or ‘right’.
		* y_crop_position accepts ‘top’, ‘center’, or ‘bottom’.
		* 750 pixels wide by 500 pixels tall
		*/

add_image_size( 'onum-blog-grid-post-thumbnail', 750, 500, array( 'center', 'top' ) );
        add_image_size( 'onum-blog-list-post-thumbnail', 870, 520, array( 'center', 'top' ) );
        add_image_size( 'onum-slide-portfolio-thumbnail', 800, 557, array( 'left', 'top' ) );
        add_image_size( 'onum-slide-portfolio-thumbnail-2', 600, 680, array( 'left', 'top' ) );
        add_image_size( 'onum-portfolio-thumbnail-left-top', 760, 760, array( 'left', 'top' ) );

/*
		 * This theme styles the visual editor to resemble the theme style,
		 * specifically font, colors, and column width.
	 	 */
		add_editor_style( array( 'css/editor-style.css', onum_fonts_url() ) );
		
	}
endif;
add_action( 'after_setup_theme', 'onum_setup' );

/**
 * Register widget area.
 *
 * @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
 */
function onum_widgets_init() {
	/* Register the 'primary' sidebar. */
	register_sidebar( array(
		'name'          => esc_html__( 'Primary Sidebar', 'onum' ),
		'id'            => 'primary',
		'description'   => esc_html__( 'Add widgets here.', 'onum' ),
		'before_widget' => '<section id="%1$s" class="widget %2$s">',
		'after_widget'  => '</section>',
		'before_title'  => '<h5 class="widget-title">',
		'after_title'   => '</h5>',
	) );

register_sidebar( array(
		'name'          => esc_html__( 'Topbar Widget', 'onum' ),
		'id'            => 'topbar_widget',
		'description'   => esc_html__( 'Add languages switcher widgets here.', 'onum' ),
		'before_widget' => '<div id="%1$s" class="topbar_widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h5 class="topbar_widget-title">',
		'after_title'   => '</h5>',
	) );
	/* Repeat register_sidebar() code for additional sidebars. */
}
add_action( 'widgets_init', 'onum_widgets_init' );

/**
 * Register custom fonts.
 */
if ( ! function_exists( 'onum_fonts_url' ) ) :
/**
 * Register Google fonts for ONUM.
 *
 * Create your own onum_fonts_url() function to override in a child theme.
 *
 * @since ONUM 1.0
 *
 * @return string Google fonts URL for the theme.
 */
function onum_fonts_url() {
	$fonts_url = '';
	$font_families     = array();
	$subsets   = 'latin';

$body_typo_value = onum_get_option( 'body_typo', [] );
	$body_typo2_value = onum_get_option( 'body_typo2', [] );
	
	if ( $body_typo_value['font-family'] == '' ) {
		$font_families[] = 'Red Hat Text:400,400i,500,500i,700,700i';
	}

if ( $body_typo2_value['font-family'] == '' ) {
		$font_families[] = 'Red Hat Display:400,400i,500,500i,700,700i,900,900i';
	}

if ( $font_families ) {
		$fonts_url = add_query_arg( array(
			'family' => urlencode( implode( '|', $font_families ) ),
			'subset' => urlencode( $subsets ),
		), 'https://fonts.googleapis.com/css' );
	}
	return esc_url_raw( $fonts_url );
}
endif;

/**
 * Enqueue scripts and styles.
 */
function onum_scripts() {

// Add custom fonts, used in the main stylesheet.
	wp_enqueue_style( 'onum-fonts', onum_fonts_url(), array(), null );

/** All frontend css files **/ 
	wp_enqueue_style( 'bootstrap', get_template_directory_uri() . '/css/bootstrap.css', array(), '3.3.7', 'all');

/** load fonts **/
    wp_enqueue_style( 'onum-awesome-font', get_template_directory_uri().'/css/font-awesome.css');
    wp_enqueue_style( 'onum-flaticon-font', get_template_directory_uri().'/css/flaticon.css');

/** Slick slider **/
    wp_enqueue_style( 'slick-slider', get_template_directory_uri().'/css/slick.css');
    wp_enqueue_style( 'slick-theme', get_template_directory_uri().'/css/slick-theme.css');

/** Magnific Popup **/
    wp_enqueue_style( 'magnific-popup', get_template_directory_uri().'/css/magnific-popup.css');

if ( onum_get_option('preload') != false ) {
	    wp_enqueue_style('onum-preload', get_template_directory_uri().'/css/royal-preload.css');    	
	}
	/** Theme stylesheet. **/
	wp_enqueue_style( 'onum-style', get_stylesheet_uri() );

wp_enqueue_script( 'slick-slider', get_template_directory_uri() . '/js/slick.min.js', array( 'jquery' ), '20190829', true );
    wp_enqueue_script( 'magnific-popup', get_template_directory_uri() . '/js/jquery.magnific-popup.min.js', array( 'jquery' ), '20190829', true );  
    wp_enqueue_script( 'isotope', get_template_directory_uri().'/js/jquery.isotope.min.js', array('jquery'), '20190829',  true ); 
    wp_enqueue_script( 'imagesloaded' );        
	wp_enqueue_script( 'easypiechart', get_template_directory_uri() . '/js/easypiechart.js', array( 'jquery' ), '20190829', true );
	wp_enqueue_script( 'particles', get_template_directory_uri() . '/js/particles.min.js', array( 'jquery' ), '20190829', true );
	wp_enqueue_script( 'countdown', get_template_directory_uri() . '/js/jquery.countdown.min.js', array( 'jquery' ), '20190829', true );	
	wp_enqueue_script( 'onum-elementor', get_template_directory_uri() . '/js/elementor.js', array( 'jquery' ), '20190829', true );

if ( onum_get_option('preload') != false ) {
		wp_enqueue_script('onum-royal-preloader', get_template_directory_uri()."/js/royal_preloader.min.js",array('jquery'), '1.0', true);
	}

wp_enqueue_script( 'onum-scripts', get_template_directory_uri() . '/js/scripts.js', array( 'jquery' ), '20190829', true );
	wp_enqueue_script( 'onum-header-mobile-scripts', get_template_directory_uri() . '/js/header-mobile.js', array('jquery'), '20190829', true );

if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
		wp_enqueue_script( 'comment-reply' );
	}
}
add_action( 'wp_enqueue_scripts', 'onum_scripts' );

/**
 * Custom template tags for this theme.
 */
require get_template_directory() . '/inc/frontend/template-tags.php';

/**
 * Functions which enhance the theme by hooking into WordPress.
 */
require get_template_directory() . '/inc/frontend/template-functions.php';

/**
 * Custom Page Header for this theme.
 */
require get_template_directory() . '/inc/frontend/breadcrumbs.php';
require get_template_directory() . '/inc/frontend/page-header.php';

if ( did_action( 'elementor/loaded' ) ) {  
	require get_template_directory() . '/inc/backend/elementor/elementor-functions.php';
	require get_template_directory() . '/inc/backend/elementor/column.php';
}
require get_template_directory() . '/inc/frontend/builder.php';

/**
 * Post Like System.
 */
require get_template_directory() . '/inc/backend/post-like.php';

/**
 * Functions which add more to backend.
 */
require get_template_directory() . '/inc/backend/admin-functions.php';

/**
 * Custom metabox for this theme.
 */
require get_template_directory() . '/inc/backend/meta-boxes.php';

/**
 * Customizer additions.
 */
require get_template_directory() . '/inc/backend/customizer.php';

/**
 * Customizer additions.
 */
require get_template_directory() . '/inc/backend/color.php';

/**
 * Register the required plugins for this theme.
 */
require get_template_directory() . '/inc/backend/plugin-requires.php';

/**
 * Import demo content
 */
require get_template_directory() . '/inc/backend/importer.php';

/**
 * Load WooCommerce compatibility file.
 */
if ( class_exists( 'woocommerce' ) ) {
	require get_template_directory() . '/inc/woocommerce/woocommerce.php';
}

/**
 * Preloader js & css
 */
require get_template_directory() . '/inc/frontend/preloader.php';

function enqueue_design_test_assets() {
    // Add CSS and JS for styling and interactivity
    wp_enqueue_style('design-test-style', get_template_directory_uri() . '/css/design-test.css');
    wp_enqueue_script('design-test-script', get_template_directory_uri() . '/js/design-test.js', array('jquery'), null, true);
}
add_action('wp_enqueue_scripts', 'enqueue_design_test_assets');

// Shortcode to display the design test
function render_design_preference_test() {
    ob_start(); ?>

<div id="design-test">
        <form id="design-preference-form" action="<?php echo esc_url(admin_url('admin-ajax.php')); ?>" method="post">
            <h2>Select the style you like:</h2>
            <div class="design-options">
                <?php for ($i = 1; $i <= 6; $i++) : ?>
                    <label>
                        <input type="radio" name="design_style" value="style<?php echo $i; ?>" />
                        <img src="<?php echo get_template_directory_uri(); ?>/images/style<?php echo $i; ?>.jpg" alt="Style <?php echo $i; ?>" />
                    </label>
                <?php endfor; ?>
            </div>

<h2>Select your preferred colors:</h2>
            <div class="color-options">
                <?php foreach (['red', 'blue', 'green', 'yellow', 'black', 'white'] as $color) : ?>
                    <label>
                        <input type="radio" name="color_preference" value="<?php echo $color; ?>" />
                        <span class="color-sample" style="background-color: <?php echo $color; ?>;"></span>
                    </label>
                <?php endforeach; ?>
            </div>

<h2>Select a font style:</h2>
            <div class="font-options">
                <?php foreach (['Serif', 'Sans-serif', 'Monospace', 'Cursive'] as $font) : ?>
                    <label>
                        <input type="radio" name="font_preference" value="<?php echo strtolower($font); ?>" />
                        <span style="font-family: <?php echo $font; ?>;"><?php echo $font; ?></span>
                    </label>
                <?php endforeach; ?>
            </div>

<input type="hidden" name="action" value="save_design_preferences" />
            <button type="submit">Submit</button>
        </form>
    </div>

<?php return ob_get_clean();
}
add_shortcode('design_test', 'render_design_preference_test');

// Handle form submission via AJAX
function save_design_preferences() {
    if (!isset($_POST['action']) || $_POST['action'] !== 'save_design_preferences') {
        wp_send_json_error('Invalid request');
    }

$response = [
        'design_style' => sanitize_text_field($_POST['design_style']),
        'color_preference' => sanitize_text_field($_POST['color_preference']),
        'font_preference' => sanitize_text_field($_POST['font_preference']),
    ];

// Save preferences (optional)
    $user_id = get_current_user_id();
    update_user_meta($user_id, 'design_preferences', $response);

wp_send_json_success('Preferences saved successfully!');
}
add_action('wp_ajax_save_design_preferences', 'save_design_preferences');
add_action('wp_ajax_nopriv_save_design_preferences', 'save_design_preferences');