site-mv/functions.php

<?php
/**
 * Functions and definitions
 * 
 * @package MartinsEVieira
 */

// Constantes de versão para cache busting
define('THEME_VERSION', '1.0.5');

/**
 * Theme setup
 */
function martinsevieira_setup() {
    add_theme_support('title-tag');
    add_theme_support('post-thumbnails');
    
    register_nav_menus(array(
        'primary' => 'Menu Principal',
    ));
    
    add_theme_support('html5', array(
        'search-form',
        'comment-form',
        'comment-list',
        'gallery',
        'caption',
    ));
    
    // Adicionar tamanhos de imagem
    add_image_size('post-thumb', 400, 250, true);
}
add_action('after_setup_theme', 'martinsevieira_setup');

/**
 * Enqueue scripts and styles
 */
function martinsevieira_scripts() {
    // Styles
    wp_enqueue_style('martinsevieira-style', get_stylesheet_uri(), array(), THEME_VERSION);
    wp_enqueue_style('font-awesome', 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css', array(), '6.4.0', 'all');
    wp_style_add_data('font-awesome', 'display', 'swap');
    
    // Scripts com defer para melhor performance
    wp_enqueue_script('martinsevieira-script', get_template_directory_uri() . '/js/main.js', array(), THEME_VERSION, true);
    wp_script_add_data('martinsevieira-script', 'defer', true);
    
    // Localizar script para AJAX
    wp_localize_script('martinsevieira-script', 'ajaxData', array(
        'ajaxurl' => admin_url('admin-ajax.php'),
        'nonce' => wp_create_nonce('load_more_posts_nonce')
    ));
}
add_action('wp_enqueue_scripts', 'martinsevieira_scripts');

/**
 * Adicionar atributos async/defer aos scripts
 */
function add_defer_attribute($tag, $handle) {
    if ('martinsevieira-script' === $handle) {
        return str_replace(' src', ' defer src', $tag);
    }
    return $tag;
}
add_filter('script_loader_tag', 'add_defer_attribute', 10, 2);

/**
 * Otimizar carregamento de fontes
 */
function add_font_preconnect() {
    echo '<link rel="preconnect" href="https://cdnjs.cloudflare.com" crossorigin>';
    echo '<link rel="dns-prefetch" href="https://cdnjs.cloudflare.com">';
}
add_action('wp_head', 'add_font_preconnect', 1);

/**
 * Remover jQuery Migrate para melhor performance
 */
function remove_jquery_migrate($scripts) {
    if (!is_admin() && isset($scripts->registered['jquery'])) {
        $script = $scripts->registered['jquery'];
        if ($script->deps) {
            $script->deps = array_diff($script->deps, array('jquery-migrate'));
        }
    }
}
add_action('wp_default_scripts', 'remove_jquery_migrate');

/**
 * Desabilitar emojis do WordPress para melhor performance
 */
function disable_emojis() {
    remove_action('wp_head', 'print_emoji_detection_script', 7);
    remove_action('admin_print_scripts', 'print_emoji_detection_script');
    remove_action('wp_print_styles', 'print_emoji_styles');
    remove_action('admin_print_styles', 'print_emoji_styles');
    remove_filter('the_content_feed', 'wp_staticize_emoji');
    remove_filter('comment_text_rss', 'wp_staticize_emoji');
    remove_filter('wp_mail', 'wp_staticize_emoji_for_email');
}
add_action('init', 'disable_emojis');

/**
 * Register widget areas
 */
function martinsevieira_widgets_init() {
    register_sidebar(array(
        'name'          => 'Sidebar Principal',
        'id'            => 'sidebar-1',
        'description'   => 'Sidebar principal do site',
        'before_widget' => '<div class="widget">',
        'after_widget'  => '</div>',
        'before_title'  => '<h3 class="widget-title">',
        'after_title'   => '</h3>',
    ));
}
add_action('widgets_init', 'martinsevieira_widgets_init');

/**
 * AJAX - Carregar mais posts
 */
function load_more_posts_ajax() {
    check_ajax_referer('load_more_posts_nonce', 'nonce');
    
    $page = isset($_POST['page']) ? absint($_POST['page']) : 1;
    $posts_per_page = 3;
    
    // Cache key único para esta página
    $cache_key = 'load_more_posts_' . $page;
    $cached_data = get_transient($cache_key);
    
    if (false !== $cached_data) {
        wp_send_json_success($cached_data);
        return;
    }
    
    $args = array(
        'post_type' => 'post',
        'posts_per_page' => $posts_per_page,
        'paged' => $page,
        'orderby' => 'date',
        'order' => 'DESC',
        'no_found_rows' => false, // Necessário para max_num_pages
    );
    
    $query = new WP_Query($args);
    
    if ($query->have_posts()) :
        ob_start();
        while ($query->have_posts()) : $query->the_post();
            get_template_part('template-parts/content', 'card');
        endwhile;
        $posts_html = ob_get_clean();
        wp_reset_postdata();
        
        $response = array(
            'posts' => $posts_html,
            'max_pages' => $query->max_num_pages
        );
        
        // Cachear por 1 hora
        set_transient($cache_key, $response, HOUR_IN_SECONDS);
        
        wp_send_json_success($response);
    else :
        wp_send_json_error(array('message' => 'Não há mais posts.'));
    endif;
}
add_action('wp_ajax_load_more_posts', 'load_more_posts_ajax');
add_action('wp_ajax_nopriv_load_more_posts', 'load_more_posts_ajax');

/**
 * Limpar cache ao publicar/atualizar posts
 */
function clear_posts_cache($post_id) {
    if (get_post_type($post_id) === 'post') {
        global $wpdb;
        $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE '_transient_load_more_posts_%'");
        $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE '_transient_timeout_load_more_posts_%'");
    }
}
add_action('save_post', 'clear_posts_cache');
add_action('delete_post', 'clear_posts_cache');