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<?php
/*
Plugin Name: Disable Comments
Plugin URI: https://wordpress.org/plugins/disable-comments/
Description: Allows administrators to globally disable comments on their site. Comments can be disabled according to post type.
Version: 1.7
Author: Samir Shah
Author URI: http://www.rayofsolaris.net/
License: GPL2
Text Domain: disable-comments
Domain Path: /languages/
*/
if( !defined( 'ABSPATH' ) )
exit;
class Disable_Comments {
const DB_VERSION = 6;
private static $instance = null;
private $options;
private $networkactive;
private $modified_types = array();
public static function get_instance() {
if ( is_null( self::$instance ) ) {
self::$instance = new self;
}
return self::$instance;
}
function __construct() {
// are we network activated?
$this->networkactive = ( is_multisite() && array_key_exists( plugin_basename( __FILE__ ), (array) get_site_option( 'active_sitewide_plugins' ) ) );
// Load options
if( $this->networkactive ) {
$this->options = get_site_option( 'disable_comments_options', array() );
}
else {
$this->options = get_option( 'disable_comments_options', array() );
}
// If it looks like first run, check compat
if( empty( $this->options ) ) {
$this->check_compatibility();
}
// Upgrade DB if necessary
$this->check_db_upgrades();
$this->init_filters();
}
private function check_compatibility() {
if ( version_compare( $GLOBALS['wp_version'], '3.8', '<' ) ) {
require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
deactivate_plugins( __FILE__ );
if ( isset( $_GET['action'] ) && ( $_GET['action'] == 'activate' || $_GET['action'] == 'error_scrape' ) ) {
exit( sprintf( __( 'Disable Comments requires WordPress version %s or greater.', 'disable-comments' ), '3.8' ) );
}
}
}
private function check_db_upgrades() {
$old_ver = isset( $this->options['db_version'] ) ? $this->options['db_version'] : 0;
if( $old_ver < self::DB_VERSION ) {
if( $old_ver < 2 ) {
// upgrade options from version 0.2.1 or earlier to 0.3
$this->options['disabled_post_types'] = get_option( 'disable_comments_post_types', array() );
delete_option( 'disable_comments_post_types' );
}
if( $old_ver < 5 ) {
// simple is beautiful - remove multiple settings in favour of one
$this->options['remove_everywhere'] = isset( $this->options['remove_admin_menu_comments'] ) ? $this->options['remove_admin_menu_comments'] : false;
foreach( array( 'remove_admin_menu_comments', 'remove_admin_bar_comments', 'remove_recent_comments', 'remove_discussion', 'remove_rc_widget' ) as $v )
unset( $this->options[$v] );
}
foreach( array( 'remove_everywhere', 'permanent', 'extra_post_types' ) as $v ) {
if( !isset( $this->options[$v] ) ) {
$this->options[$v] = false;
}
}
$this->options['db_version'] = self::DB_VERSION;
$this->update_options();
}
}
private function update_options() {
if( $this->networkactive ) {
update_site_option( 'disable_comments_options', $this->options );
}
else {
update_option( 'disable_comments_options', $this->options );
}
}
/*
* Get an array of disabled post type.
*/
private function get_disabled_post_types() {
$types = $this->options['disabled_post_types'];
// Not all extra_post_types might be registered on this particular site
if( $this->networkactive ) {
foreach( (array) $this->options['extra_post_types'] as $extra ) {
if( post_type_exists( $extra ) ) {
$types[] = $extra;
}
}
}
return $types;
}
/*
* Check whether comments have been disabled on a given post type.
*/
private function is_post_type_disabled( $type ) {
return in_array( $type, $this->get_disabled_post_types() );
}
private function init_filters() {
// These need to happen now
if( $this->options['remove_everywhere'] ) {
add_action( 'widgets_init', array( $this, 'disable_rc_widget' ) );
add_filter( 'wp_headers', array( $this, 'filter_wp_headers' ) );
add_action( 'template_redirect', array( $this, 'filter_query' ), 9 ); // before redirect_canonical
// Admin bar filtering has to happen here since WP 3.6
add_action( 'template_redirect', array( $this, 'filter_admin_bar' ) );
add_action( 'admin_init', array( $this, 'filter_admin_bar' ) );
}
// These can happen later
add_action( 'plugins_loaded', array( $this, 'register_text_domain' ) );
add_action( 'wp_loaded', array( $this, 'init_wploaded_filters' ) );
}
public function register_text_domain() {
load_plugin_textdomain( 'disable-comments', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
}
public function init_wploaded_filters(){
$disabled_post_types = $this->get_disabled_post_types();
if( !empty( $disabled_post_types ) ) {
foreach( $disabled_post_types as $type ) {
// we need to know what native support was for later
if( post_type_supports( $type, 'comments' ) ) {
$this->modified_types[] = $type;
remove_post_type_support( $type, 'comments' );
remove_post_type_support( $type, 'trackbacks' );
}
}
add_filter( 'comments_array', array( $this, 'filter_existing_comments' ), 20, 2 );
add_filter( 'comments_open', array( $this, 'filter_comment_status' ), 20, 2 );
add_filter( 'pings_open', array( $this, 'filter_comment_status' ), 20, 2 );
}
elseif( is_admin() ) {
add_action( 'all_admin_notices', array( $this, 'setup_notice' ) );
}
// Filters for the admin only
if( is_admin() ) {
if( $this->networkactive ) {
add_action( 'network_admin_menu', array( $this, 'settings_menu' ) );
add_action( 'network_admin_menu', array( $this, 'tools_menu' ) );
add_filter( 'network_admin_plugin_action_links', array( $this, 'plugin_actions_links'), 10, 2 );
}
else {
add_action( 'admin_menu', array( $this, 'settings_menu' ) );
add_action( 'admin_menu', array( $this, 'tools_menu' ) );
add_filter( 'plugin_action_links', array( $this, 'plugin_actions_links'), 10, 2 );
if( is_multisite() ) // We're on a multisite setup, but the plugin isn't network activated.
register_deactivation_hook( __FILE__, array( $this, 'single_site_deactivate' ) );
}
add_action( 'admin_print_footer_scripts', array( $this, 'discussion_notice' ) );
add_filter( 'plugin_row_meta', array( $this, 'set_plugin_meta' ), 10, 2 );
// if only certain types are disabled, remember the original post status
if( !( $this->persistent_mode_allowed() && $this->options['permanent'] ) && !$this->options['remove_everywhere'] ) {
add_action( 'edit_form_advanced', array( $this, 'edit_form_inputs' ) );
add_action( 'edit_page_form', array( $this, 'edit_form_inputs' ) );
}
if( $this->options['remove_everywhere'] ) {
add_action( 'admin_menu', array( $this, 'filter_admin_menu' ), 9999 ); // do this as late as possible
add_action( 'admin_print_footer_scripts-index.php', array( $this, 'dashboard_js' ) );
add_action( 'wp_dashboard_setup', array( $this, 'filter_dashboard' ) );
add_filter( 'pre_option_default_pingback_flag', '__return_zero' );
}
}
// Filters for front end only
else {
add_action( 'template_redirect', array( $this, 'check_comment_template' ) );
if( $this->options['remove_everywhere'] ) {
add_filter( 'feed_links_show_comments_feed', '__return_false' );
}
}
}
/*
* Replace the theme's comment template with a blank one.
* To prevent this, define DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE
* and set it to True
*/
public function check_comment_template() {
if( is_singular() && ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( get_post_type() ) ) ) {
if( !defined( 'DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE' ) || DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE == true ) {
// Kill the comments template.
add_filter( 'comments_template', array( $this, 'dummy_comments_template' ), 20 );
}
// Remove comment-reply script for themes that include it indiscriminately
wp_deregister_script( 'comment-reply' );
// feed_links_extra inserts a comments RSS link
remove_action( 'wp_head', 'feed_links_extra', 3 );
}
}
public function dummy_comments_template() {
return dirname( __FILE__ ) . '/includes/comments-template.php';
}
/*
* Remove the X-Pingback HTTP header
*/
public function filter_wp_headers( $headers ) {
unset( $headers['X-Pingback'] );
return $headers;
}
/*
* Issue a 403 for all comment feed requests.
*/
public function filter_query() {
if( is_comment_feed() ) {
wp_die( __( 'Comments are closed.' ), '', array( 'response' => 403 ) );
}
}
/*
* Remove comment links from the admin bar.
*/
public function filter_admin_bar() {
if( is_admin_bar_showing() ) {
// Remove comments links from admin bar
remove_action( 'admin_bar_menu', 'wp_admin_bar_comments_menu', 60 );
if( is_multisite() ) {
add_action( 'admin_bar_menu', array( $this, 'remove_network_comment_links' ), 500 );
}
}
}
/*
* Remove comment links from the admin bar in a multisite network.
*/
public function remove_network_comment_links( $wp_admin_bar ) {
if( $this->networkactive && is_user_logged_in() ) {
foreach( (array) $wp_admin_bar->user->blogs as $blog ) {
$wp_admin_bar->remove_menu( 'blog-' . $blog->userblog_id . '-c' );
}
}
else {
// We have no way to know whether the plugin is active on other sites, so only remove this one
$wp_admin_bar->remove_menu( 'blog-' . get_current_blog_id() . '-c' );
}
}
public function edit_form_inputs() {
global $post;
// Without a dicussion meta box, comment_status will be set to closed on new/updated posts
if( in_array( $post->post_type, $this->modified_types ) ) {
echo '<input type="hidden" name="comment_status" value="' . $post->comment_status . '" /><input type="hidden" name="ping_status" value="' . $post->ping_status . '" />';
}
}
public function discussion_notice(){
$disabled_post_types = $this->get_disabled_post_types();
if( get_current_screen()->id == 'options-discussion' && !empty( $disabled_post_types ) ) {
$names = array();
foreach( $disabled_post_types as $type )
$names[$type] = get_post_type_object( $type )->labels->name;
?>
<script>
jQuery(document).ready(function($){
$(".wrap h2").first().after( <?php echo json_encode( '<div style="color: #900"><p>' . sprintf( __( 'Note: The <em>Disable Comments</em> plugin is currently active, and comments are completely disabled on: %s. Many of the settings below will not be applicable for those post types.', 'disable-comments' ), implode( __( ', ' ), $names ) ) . '</p></div>' );?> );
});
</script>
<?php
}
}
/**
* Return context-aware settings page URL
*/
private function settings_page_url() {
$base = $this->networkactive ? network_admin_url( 'settings.php' ) : admin_url( 'options-general.php' );
return add_query_arg( 'page', 'disable_comments_settings', $base );
}
/**
* Return context-aware tools page URL
*/
private function tools_page_url() {
$base = $this->networkactive ? network_admin_url( 'settings.php' ) : admin_url( 'tools.php' );
return add_query_arg( 'page', 'disable_comments_tools', $base );
}
public function setup_notice(){
if( strpos( get_current_screen()->id, 'settings_page_disable_comments_settings' ) === 0 )
return;
$hascaps = $this->networkactive ? is_network_admin() && current_user_can( 'manage_network_plugins' ) : current_user_can( 'manage_options' );
if( $hascaps ) {
echo '<div class="updated fade"><p>' . sprintf( __( 'The <em>Disable Comments</em> plugin is active, but isn\'t configured to do anything yet. Visit the <a href="%s">configuration page</a> to choose which post types to disable comments on.', 'disable-comments'), esc_attr( $this->settings_page_url() ) ) . '</p></div>';
}
}
public function filter_admin_menu(){
global $pagenow;
if ( $pagenow == 'comment.php' || $pagenow == 'edit-comments.php' || $pagenow == 'options-discussion.php' )
wp_die( __( 'Comments are closed.' ), '', array( 'response' => 403 ) );
remove_menu_page( 'edit-comments.php' );
remove_submenu_page( 'options-general.php', 'options-discussion.php' );
}
public function filter_dashboard(){
remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' );
}
public function dashboard_js(){
echo '<script>
jQuery(function($){
$("#dashboard_right_now .comment-count, #latest-comments").hide();
$("#welcome-panel .welcome-comments").parent().hide();
});
</script>';
}
public function filter_existing_comments($comments, $post_id) {
$post = get_post( $post_id );
return ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( $post->post_type ) ) ? array() : $comments;
}
public function filter_comment_status( $open, $post_id ) {
$post = get_post( $post_id );
return ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( $post->post_type ) ) ? false : $open;
}
public function disable_rc_widget() {
unregister_widget( 'WP_Widget_Recent_Comments' );
}
public function set_plugin_meta( $links, $file ) {
static $plugin;
$plugin = plugin_basename( __FILE__ );
if ( $file == $plugin ) {
$links[] = '<a href="https://github.com/solarissmoke/disable-comments">GitHub</a>';
}
return $links;
}
/**
* Add links to Settings page
*/
public function plugin_actions_links( $links, $file ) {
static $plugin;
$plugin = plugin_basename( __FILE__ );
if( $file == $plugin && current_user_can('manage_options') ) {
array_unshift(
$links,
sprintf( '<a href="%s">%s</a>', esc_attr( $this->settings_page_url() ), __( 'Settings' ) ),
sprintf( '<a href="%s">%s</a>', esc_attr( $this->tools_page_url() ), __( 'Tools' ) )
);
}
return $links;
}
public function settings_menu() {
$title = _x( 'Disable Comments', 'settings menu title', 'disable-comments' );
if( $this->networkactive )
add_submenu_page( 'settings.php', $title, $title, 'manage_network_plugins', 'disable_comments_settings', array( $this, 'settings_page' ) );
else
add_submenu_page( 'options-general.php', $title, $title, 'manage_options', 'disable_comments_settings', array( $this, 'settings_page' ) );
}
public function settings_page() {
include dirname( __FILE__ ) . '/includes/settings-page.php';
}
public function tools_menu() {
$title = __( 'Delete Comments', 'disable-comments' );
if( $this->networkactive )
add_submenu_page( 'settings.php', $title, $title, 'manage_network_plugins', 'disable_comments_tools', array( $this, 'tools_page' ) );
else
add_submenu_page( 'tools.php', $title, $title, 'manage_options', 'disable_comments_tools', array( $this, 'tools_page' ) );
}
public function tools_page() {
include dirname( __FILE__ ) . '/includes/tools-page.php';
}
private function enter_permanent_mode() {
$types = $this->get_disabled_post_types();
if( empty( $types ) )
return;
global $wpdb;
if( $this->networkactive ) {
// NOTE: this can be slow on large networks!
$blogs = $wpdb->get_col( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND deleted = '0'", $wpdb->siteid ) );
foreach ( $blogs as $id ) {
switch_to_blog( $id );
$this->close_comments_in_db( $types );
restore_current_blog();
}
}
else {
$this->close_comments_in_db( $types );
}
}
private function close_comments_in_db( $types ){
global $wpdb;
$bits = implode( ', ', array_pad( array(), count( $types ), '%s' ) );
$wpdb->query( $wpdb->prepare( "UPDATE `$wpdb->posts` SET `comment_status` = 'closed', ping_status = 'closed' WHERE `post_type` IN ( $bits )", $types ) );
}
private function persistent_mode_allowed() {
if( defined( 'DISABLE_COMMENTS_ALLOW_PERSISTENT_MODE' ) && DISABLE_COMMENTS_ALLOW_PERSISTENT_MODE == false ) {
return false;
}
}
public function single_site_deactivate() {
// for single sites, delete the options upon deactivation, not uninstall
delete_option( 'disable_comments_options' );
}
}
Disable_Comments::get_instance();