<?php

function gdk_feed_disabled()
{
    wp_die('Feed已经关闭, 请访问网站<a href="'.get_bloginfo('url').'">首页</a>！');
}

add_action('do_feed', 'gdk_feed_disabled', 1);
add_action('do_feed_rdf', 'gdk_feed_disabled', 1);
add_action('do_feed_rss', 'gdk_feed_disabled', 1);
add_action('do_feed_rss2', 'gdk_feed_disabled', 1);
add_action('do_feed_atom', 'gdk_feed_disabled', 1);

add_action('wp_head', 'gdk_record_visitors');

//禁用新版编辑器
if (gdk_option('gdk_diasble_gutenberg')) {
    add_filter('use_block_editor_for_post', '__return_false');
    remove_action('wp_enqueue_scripts', 'wp_common_block_scripts_and_styles');
}

add_filter('user_can_richedit', '__return_false');

//禁用响应式图片
function gdk_disable_srcset_img()
{
    return 1;
}
add_filter('max_srcset_image_width', 'gdk_disable_srcset_img');

add_filter('big_image_size_threshold', '__return_false');

//移除默认的图片宽度以及高度
function gdk_remove_img_width($html)
{
    return preg_replace('/(width|height)=\"\d*\"\s/', '', $html);
}
add_filter('post_thumbnail_html', 'gdk_remove_img_width', 10);
add_filter('image_send_to_editor', 'gdk_remove_img_width', 10);

//取消后台登陆错误的抖动提示
function gdk_wps_login_error()
{
    remove_action('login_head', 'wp_shake_js', 12);
}
add_action('login_head', 'gdk_wps_login_error');

//清除wp_footer带入的embed.min.js
function gdk_deregister_embed_script()
{
    wp_deregister_script('wp-embed');
}
add_action('wp_footer', 'gdk_deregister_embed_script');

//禁用默认的附件页面
function gdk_disable_attachment_pages()
{
    global $post;
    if (is_attachment()) {
        if (!empty($post->post_parent)) {
            wp_redirect(get_permalink($post->post_parent), 301);

            exit;
        }
        wp_redirect(home_url());

        exit;
    }
}
add_action('template_redirect', 'gdk_disable_attachment_pages', 1);

// 友情链接扩展
add_filter('pre_option_link_manager_enabled', '__return_true');
//隐藏顶部工具栏
add_filter('show_admin_bar', '__return_false');
//关闭格式化
add_filter('run_wptexturize', '__return_false');
//禁用找回密码
add_filter('allow_password_reset', '__return_false');
add_filter('wp_password_change_notification_email', '__return_false'); //关闭密码修改站长邮件
add_filter('password_change_email', '__return_false'); //关闭密码修改用户邮件
add_filter('wp_new_user_notification_email', '__return_false'); //关闭新用户注册用户邮件
//使链接自动可点击
add_filter('the_content', 'make_clickable');
//分类，标签描述添加图片
remove_filter('pre_term_description', 'wp_filter_kses');
remove_filter('pre_link_description', 'wp_filter_kses');
remove_filter('pre_link_notes', 'wp_filter_kses');
remove_filter('term_description', 'wp_kses_data');
//关闭WordPress欢迎
remove_action('welcome_panel', 'wp_welcome_panel');

//自动中英文空格
if (gdk_option('gdk_auto_space')) {
    function gdk_auto_space($data)
    {
        $data = preg_replace('/([\\x{4e00}-\\x{9fa5}]+)([A-Za-z0-9_]+)/u', '${1} ${2}', $data);

        return preg_replace('/([A-Za-z0-9_]+)([\\x{4e00}-\\x{9fa5}]+)/u', '${1} ${2}', $data);
    }
    add_filter('the_content', 'gdk_auto_space');
}

function gdk_after_init_theme()
{
    update_option('image_default_align', 'center'); //居中显示
    update_option('image_default_link_type', 'file'); //连接到媒体文件本身
    update_option('image_default_size', 'full'); //完整尺寸
    update_option('large_size_h', '0'); //关闭默认缩略图
    update_option('large_size_w', '0'); //关闭默认缩略图
    update_option('medium_large_size_h', '0'); //关闭默认缩略图
    update_option('medium_large_size_w', '0'); //关闭默认缩略图
    update_option('medium_size_h', '0'); //关闭默认缩略图
    update_option('medium_size_w', '0'); //关闭默认缩略图
    update_option('thumbnail_size_w', '0'); //关闭默认缩略图
    update_option('thumbnail_size_h', '0'); //关闭默认缩略图
    update_option('default_ping_status', 'closed'); //关闭默认ping状态
    update_option('comment_order', 'desc'); //关闭默认评论显示顺序
    if ('' == get_option('permalink_structure') || define('GDK_HTML_LINK', true)) { //如果是默认连接格式或者主题声明 define( 'GDK_HTML_LINK', true );
        update_option('permalink_structure', '/archives/%post_id%.html'); //固定链接格式
    }
    if (gdk_option('gdk_diasble_widgets_block')) { //如果
        remove_theme_support('widgets-block-editor'); //禁用新版小工具
    }
    update_option('posts_per_page', '30'); //每页文章数目
}
add_action('after_setup_theme', 'gdk_after_init_theme');

//新标签打开顶部网站链接
function gdk_blank_site_bar($wp_admin_bar)
{
    $node = $wp_admin_bar->get_node('view-site');
    $node->meta['target'] = '_blank';
    $wp_admin_bar->add_node($node);
}
add_action('admin_bar_menu', 'gdk_blank_site_bar', 80);

//移除 WP_Head 无关紧要的代码
if (gdk_option('gdk_diasble_head_useless')) {
    remove_action('wp_head', 'wp_generator'); //删除 head 中的 WP 版本号
    foreach (['rss2_head', 'commentsrss2_head', 'rss_head', 'rdf_header', 'atom_head', 'comments_atom_head', 'opml_head', 'app_head'] as $action) {
        remove_action($action, 'the_generator');
    }

    remove_action('wp_head', 'rsd_link'); //删除 head 中的 RSD LINK
    remove_action('wp_head', 'wlwmanifest_link'); //删除 head 中的 Windows Live Writer 的适配器？
    remove_action('wp_head', 'feed_links_extra', 3); //删除 head 中的 Feed 相关的link
    //remove_action( 'wp_head', 'feed_links', 2 );
    remove_action('wp_head', 'index_rel_link'); //删除 head 中首页，上级，开始，相连的日志链接
    remove_action('wp_head', 'parent_post_rel_link', 10);
    remove_action('wp_head', 'start_post_rel_link', 10);
    remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10);
    remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0); //删除 head 中的 shortlink
    remove_action('wp_head', 'rest_output_link_wp_head', 10); // 删除头部输出 WP RSET API 地址
    remove_action('template_redirect', 'wp_shortlink_header', 11); //禁止短链接 Header 标签。
    remove_action('template_redirect', 'rest_output_link_header', 11); // 禁止输出 Header Link 标签。
    remove_action('wp_head', 'wp_oembed_add_discovery_links', 10);
    remove_action('wp_head', 'wp_oembed_add_discovery_links');
    remove_action('wp_head', 'wp_oembed_add_host_js');
}

//去掉后台帮助
add_action('in_admin_header', function () {
    global $current_screen;
    $current_screen->remove_help_tabs();
});
//清理菜单类
add_filter('nav_menu_css_class', function ($var) {
    return is_array($var) ? array_intersect($var, ['current-menu-item', 'menu-item', 'menu-item-has-children']) : '';
}, 100, 1);

//移除前台加载jquery-migrate
function gdk_disable_migrate($scripts)
{
    if (!is_admin() && !empty($scripts->registered['jquery'])) {
        $scripts->registered['jquery']->deps = array_diff(
            $scripts->registered['jquery']->deps,
            ['jquery-migrate']
        );
    }
}
add_action('wp_default_scripts', 'gdk_disable_migrate');

//移除 WordPress 标记
add_filter('the_generator', function () {return ''; });

//移除标题中的空字符
add_filter('wp_title', function ($title) {return trim($title); });

// 开始关闭WordPress更新
if (gdk_option('gdk_diasble_wp_update')) {
    add_filter('automatic_updater_disabled', '__return_true'); // 彻底关闭自动更新
    remove_action('init', 'wp_schedule_update_checks'); // 关闭更新检查定时作业
    wp_clear_scheduled_hook('wp_version_check'); // 移除已有的版本检查定时作业
    wp_clear_scheduled_hook('wp_update_plugins'); // 移除已有的插件更新定时作业
    wp_clear_scheduled_hook('wp_update_themes'); // 移除已有的主题更新定时作业
    wp_clear_scheduled_hook('wp_maybe_auto_update'); // 移除已有的自动更新定时作业
    remove_action('admin_init', '_maybe_update_core'); // 移除后台内核更新检查
    remove_action('load-plugins.php', 'wp_update_plugins'); // 移除后台插件更新检查
    remove_action('load-update.php', 'wp_update_plugins');
    remove_action('load-update-core.php', 'wp_update_plugins');
    remove_action('admin_init', '_maybe_update_plugins');
    remove_action('load-themes.php', 'wp_update_themes'); // 移除后台主题更新检查
    remove_action('load-update.php', 'wp_update_themes');
    remove_action('load-update-core.php', 'wp_update_themes');
    remove_action('admin_init', '_maybe_update_themes');
    add_filter('pre_site_transient_update_core', function () {return null; });
    add_filter('pre_site_transient_update_plugins', function () {return null; });
    add_filter('pre_site_transient_update_themes', function () {return null; });
}

add_action('wp_before_admin_bar_render', function () {
    global $wp_admin_bar;
    $wp_admin_bar->remove_menu('wp-logo');
    $wp_admin_bar->remove_menu('about');
    $wp_admin_bar->remove_menu('wporg');
    $wp_admin_bar->remove_menu('documentation');
    $wp_admin_bar->remove_menu('support-forums');
    $wp_admin_bar->remove_menu('feedback');
});

//禁用自带p标签的
remove_filter('the_content', 'wpautop');
add_filter('the_content', 'wpautop', 12);

// 禁止后台加载谷歌字体
function gdk_remove_open_sans()
{
    wp_deregister_style('open-sans');
    wp_register_style('open-sans', false);
    wp_enqueue_style('open-sans', '');
}
add_action('init', 'gdk_remove_open_sans');

//WordPress 彻底移除后台“隐私”设置功能
add_filter('map_meta_cap', 'ds_disable_core_privacy_tools', 10, 2);
remove_action('init', 'wp_schedule_delete_old_privacy_export_files');
remove_action('wp_privacy_delete_old_export_files', 'wp_privacy_delete_old_export_files');
function ds_disable_core_privacy_tools($caps, $cap)
{
    switch ($cap) {
        case 'export_others_personal_data':
        case 'erase_others_personal_data':
        case 'manage_privacy_options':
            $caps[] = 'do_not_allow';

            break;
    }

    return $caps;
}

// 禁止dns-prefetch
function gdk_remove_dns($hints, $relation_type)
{
    if ('dns-prefetch' === $relation_type) {
        return array_diff(wp_dependencies_unique_hosts(), $hints);
    }

    return $hints;
}
add_filter('wp_resource_hints', 'gdk_remove_dns', 10, 2);

//禁用emoji功能
if (gdk_option('gdk_disable_emojis')) {
    function gdk_disable_emojis_link()
    {
        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_filter('tiny_mce_plugins', 'gdk_disable_emojis_tinymce');
    }
    add_action('init', 'gdk_disable_emojis_link');

    function gdk_disable_emojis_tinymce($plugins)
    {
        if (is_array($plugins)) {
            return array_diff($plugins, ['wpemoji']);
        }

        return [];
    }
}

//禁用日志修订功能
if (gdk_option('gdk_disable_revision')) {
    add_filter('wp_revisions_to_keep', 'gdk_revisions_to_keep', 10, 2);
    function gdk_revisions_to_keep($num, $post)
    {
        return 0;
    }
    add_action('wp_print_scripts', 'gdk_disable_autosave');
    function gdk_disable_autosave()
    {
        wp_deregister_script('autosave');
    }
}

//文章最多保存 5 个版本,默认的
if (!defined('WP_POST_REVISIONS')) {
    define('WP_POST_REVISIONS', 5);
}

//前台禁用dashicon和editor
if (gdk_option('gdk_disable_dashicons')) {
    add_action(
        'init',
        function () {
            if (!is_user_logged_in()) {
                wp_deregister_style('dashicons');
                wp_register_style('dashicons', false);
                wp_enqueue_style('dashicons', '');
                wp_deregister_style('editor-buttons');
                wp_register_style('editor-buttons', false);
                wp_enqueue_style('editor-buttons', '');
            }
        }
    );
}

//禁用WordPress活动
function gdk_dweandw_remove()
{
    remove_meta_box('dashboard_primary', get_current_screen(), 'side');
}
add_action('wp_network_dashboard_setup', 'gdk_dweandw_remove', 20);
add_action('wp_user_dashboard_setup', 'gdk_dweandw_remove', 20);
add_action('wp_dashboard_setup', 'gdk_dweandw_remove', 20);

//国内更新WordPress加速
if (gdk_option('gdk_porxy_update') && !gdk_option('gdk_diasble_wp_update')) {
    add_filter(
        'site_transient_update_core',
        function ($value) {
            foreach ($value->updates as &$update) {
                if ('zh_CN' == $update->locale) {
                    $update->download = 'http://cn.wp101.net/latest-zh_CN.zip';
                    $update->packages->full = 'http://cn.wp101.net/latest-zh_CN.zip';
                }
            }

            return $value;
        }
    );
}

//文件自动重命名
if (gdk_option('gdk_upload_rename')) {
    function gdk_upload_rename($file)
    {
        $info = pathinfo($file['name']);
        $ext = $info['extension'];
        $ignore_exts = ['zip', 'rar', '7z'];
        //被忽略的文件格式
        if (!array_key_exists($ext, $ignore_exts)) {
            $filedate = date('YmdHis').mt_rand(100, 999);
            $file['name'] = $filedate.'.'.$ext;
        }

        return $file;
    }
    add_filter('wp_handle_upload_prefilter', 'gdk_upload_rename');
}

// 禁用自动生成的图片尺寸
function gdk_disable_image_sizes($sizes)
{
    unset($sizes['thumbnail'], $sizes['medium'], $sizes['large'], $sizes['medium_large'], $sizes['1536x1536'], $sizes['2048x2048']); // disable thumbnail size
    // disable medium size
    // disable large size
    // disable medium-large size
    // disable 2x medium-large size
    // disable 2x large size
    return $sizes;
}
add_action('intermediate_image_sizes_advanced', 'gdk_disable_image_sizes');
// 禁用缩放尺寸
add_filter('big_image_size_threshold', '__return_false');
// 禁用其他图片尺寸
function gdk_disable_other_image_sizes()
{
    remove_image_size('post-thumbnail'); // disable images added via set_post_thumbnail_size()
    remove_image_size('another-size'); // disable any other added image sizes
}
add_action('init', 'gdk_disable_other_image_sizes');

// 搜索结果为1时候自动跳转到对应页面
function gdk_redirect_single_search_result()
{
    if (is_search()) {
        global $wp_query;
        if (1 == $wp_query->post_count) {
            wp_redirect(get_permalink($wp_query->posts['0']->ID));

            exit();
        }
    }
}
add_action('template_redirect', 'gdk_redirect_single_search_result');

//搜索链接伪静态
function gdk_redirect_search()
{
    if (is_search() && !empty($_GET['s'])) {
        wp_redirect(home_url('/search/').urlencode(get_query_var('s')));

        exit();
    }
}
add_action('template_redirect', 'gdk_redirect_search');

//替换后台默认的底部文字内容
function gdk_replace_footer_admin()
{
    $result = apply_filters('gdk_filter_admin_footer_text', '由GDK插件提供底层支持');
    echo $result;
}
add_filter('admin_footer_text', 'gdk_replace_footer_admin');

//禁用REST API功能
if (gdk_option('gdk_disable_restapi')) {
    add_action('rest_pre_dispatch', 'deactivate_rest_api');
    add_action('rest_authentication_errors', 'deactivate_rest_api');
    function deactivate_rest_api()
    {
        status_header(405);
        wp_die('{"code":"rest_api_disabled","message":"REST API services are disabled on this site.","data":{"status":405}}');
    }
    // Remove the REST API endpoint.
    remove_action('rest_api_init', 'wp_oembed_register_route');
}

// 定制登录页面链接的连接
add_filter('login_headerurl', function () {
    return home_url();
});

// 定制登录页面链接的标题
add_filter('login_headertext', function () {
    return get_bloginfo('name');
});

function gdk_custom_head_code()
{
    $gdk_custom_head_code = gdk_option('gdk_custom_head_code');
    echo $gdk_custom_head_code;
}
add_action('wp_head', 'gdk_custom_head_code');

function gdk_custom_footer_code()
{
    $gdk_custom_footer_code = gdk_option('gdk_custom_foot_code');
    echo $gdk_custom_footer_code;
}
add_action('wp_footer', 'gdk_custom_footer_code', 400);

if (gdk_option('gdk_no_category')) {
    if (!function_exists('gdk_no_category_base_refresh_rules')) {
        add_action('load-themes.php', 'gdk_no_category_base_refresh_rules');
        add_action('created_category', 'gdk_no_category_base_refresh_rules');
        add_action('edited_category', 'gdk_no_category_base_refresh_rules');
        add_action('delete_category', 'gdk_no_category_base_refresh_rules');
        function gdk_no_category_base_refresh_rules()
        {
            global $wp_rewrite;
            $wp_rewrite->flush_rules();
        }
        add_action('init', 'gdk_no_category_base_permastruct');
        function gdk_no_category_base_permastruct()
        {
            global $wp_rewrite;
            $wp_rewrite->extra_permastructs['category']['struct'] = '%category%';
        }
        // Add our custom category rewrite rules
        add_filter('category_rewrite_rules', 'gdk_no_category_base_rewrite_rules');
        function gdk_no_category_base_rewrite_rules($category_rewrite)
        {
            //var_dump($category_rewrite); // For Debugging
            $category_rewrite = [];
            $categories = get_categories(['hide_empty' => false]);
            foreach ($categories as $category) {
                $gdk_category = $category->slug;
                if ($category->parent == $category->cat_ID) { // recursive recursion
                    $category->parent = 0;
                } elseif (0 != $category->parent) {
                    $gdk_category = get_category_parents($category->parent, false, '/', true).$gdk_category;
                }

                $category_rewrite['('.$gdk_category.')/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?category_name=$matches[1]&feed=$matches[2]';
                $category_rewrite['('.$gdk_category.')/page/?([0-9]{1,})/?$'] = 'index.php?category_name=$matches[1]&paged=$matches[2]';
                $category_rewrite['('.$gdk_category.')/?$'] = 'index.php?category_name=$matches[1]';
            }
            // Redirect support from Old Category Base
            global $wp_rewrite;
            $old_category_base = get_option('category_base') ? get_option('category_base') : 'category';
            $old_category_base = trim($old_category_base, '/');
            $category_rewrite[$old_category_base.'/(.*)$'] = 'index.php?category_redirect=$matches[1]';

            return $category_rewrite;
        }
        // Add 'category_redirect' query variable
        add_filter('query_vars', 'gdk_no_category_base_query_vars');
        function gdk_no_category_base_query_vars($public_query_vars)
        {
            $public_query_vars[] = 'category_redirect';

            return $public_query_vars;
        }

        add_filter('request', 'gdk_no_category_base_request');
        function gdk_no_category_base_request($query_vars)
        {
            if (isset($query_vars['category_redirect'])) {
                $catlink = trailingslashit(get_option('home')).user_trailingslashit($query_vars['category_redirect'], 'category');
                status_header(301);
                header("Location: {$catlink}");

                exit();
            }

            return $query_vars;
        }
    }
}

//站长评论邮件添加评论链接
function gdk_notify_admin($notify_message, $comment_ID)
{
    $notify = $notify_message;
    $notify .= '快速回复此评论: '.admin_url('edit-comments.php').'#comment-'.$comment_ID;

    return $notify;
}
add_filter('comment_notification_text', 'gdk_notify_admin', 10, 2);

// 评论添加@，来自：http://www.ludou.org/wordpress-comment-reply-add-at.html
function gdk_comment_add_at($comment_text, $comment = '')
{
    if ($comment->comment_parent > 0) {
        $comment_text = '@<a href="#comment-'.$comment->comment_parent.'">'.get_comment_author($comment->comment_parent).'</a> '.$comment_text;
    }

    return $comment_text;
}
add_filter('comment_text', 'gdk_comment_add_at', 20, 2);

//搜索结果排除所有页面
function gdk_search_filter_page($query)
{
    if ($query->is_search && !$query->is_admin) {
        $query->set('post_type', 'post');
    }

    return $query;
}
add_filter('pre_get_posts', 'gdk_search_filter_page');