<?php

add_action('admin_init', function () {
	// Redirect any user trying to access comments page
	global $pagenow;

	if ($pagenow === 'edit-comments.php' || $pagenow === 'options-discussion.php') {
		wp_redirect(admin_url());
		exit;
	}

	// Remove comments metabox from dashboard
	remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');

	// Disable support for comments and trackbacks in post types
	foreach (get_post_types() as $post_type) {
		if (post_type_supports($post_type, 'comments')) {
			remove_post_type_support($post_type, 'comments');
			remove_post_type_support($post_type, 'trackbacks');
		}
	}
});

// Close comments on the front-end
add_filter('comments_open', '__return_false', 20, 2);
add_filter('pings_open', '__return_false', 20, 2);

// Remove comment feed links
add_filter('feed_links_show_comments_feed', '__return_false');

// Hide existing comments
add_filter('comments_array', '__return_empty_array', 10, 2);

// Remove comments page in menu
add_action('admin_menu', function () {
  remove_menu_page('edit-comments.php');
	remove_submenu_page('options-general.php', 'options-discussion.php');
});

// Remove comments links from admin bar
add_action('init', function () {
	if (is_admin_bar_showing()) {
		remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
	}
});

// Remove comments icon from admin bar
add_action('wp_before_admin_bar_render', function() {
	global $wp_admin_bar;
	$wp_admin_bar->remove_menu('comments');
});

// Return a comment count of zero to hide existing comment entry link.
function zero_comment_count($count){
	return 0;
}
add_filter('get_comments_number', 'zero_comment_count');

// Multisite - Remove manage comments from admin bar
add_action( 'admin_bar_menu', 'remove_toolbar_items', PHP_INT_MAX -1 );
function remove_toolbar_items( $bar )
{
	$sites = get_blogs_of_user( get_current_user_id() );
	foreach ( $sites as $site )
	{
		$bar->remove_node( "blog-{$site->userblog_id}-c" );
	}
}