<?php
/*
Plugin Name: Roots Hide WP
Plugin URI: http://joshbetz.com/2012/04/roots-hide-wp/
Description: The plugin version of Ben Word's blogpost, http://benword.com/2011/how-to-hide-that-youre-using-wordpress/.
Author: Josh Betz
Version: 0.1
Author URI: http://joshbetz.com/
*/

// Turn of Widows Live Writer support
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'wlwmanifest_link');

// Hide WP version from the public
remove_action('wp_head', 'wp_generator');

// remove WordPress version from RSS feeds
function roots_no_generator() { return ''; }
add_filter('the_generator', 'roots_no_generator');

// rewrite /wp-content/themes/theme-name/css/ to /css/
// rewrite /wp-content/themes/theme-name/js/  to /js/
// rewrite /wp-content/themes/theme-name/images/ to /images/
// rewrite /wp-content/plugins/ to /plugins/

add_action('admin_init', 'roots_flush_rewrites');
function roots_flush_rewrites() {
  global $wp_rewrite;
  $wp_rewrite->flush_rules();
}
add_action('generate_rewrite_rules', 'roots_add_rewrites');
function roots_add_rewrites($content) {
  $theme_name = next(explode('/themes/', get_stylesheet_directory()));
  global $wp_rewrite;
  $roots_new_non_wp_rules = array(
    'css/(.*)'      => 'wp-content/themes/'. $theme_name . '/css/$1',
    'js/(.*)'       => 'wp-content/themes/'. $theme_name . '/js/$1',
    'images/(.*)'      => 'wp-content/themes/'. $theme_name . '/images/$1',
    'plugins/(.*)'  => 'wp-content/plugins/$1'
  );
  $wp_rewrite->non_wp_rules += $roots_new_non_wp_rules;
}

if (!is_admin()) {
  add_filter('plugins_url', 'roots_clean_plugins');
  add_filter('bloginfo', 'roots_clean_assets');
  add_filter('stylesheet_directory_uri', 'roots_clean_assets');
  add_filter('template_directory_uri', 'roots_clean_assets');
  add_filter('script_loader_src', 'roots_clean_plugins');
  add_filter('style_loader_src', 'roots_clean_plugins');
}
function roots_clean_assets($content) {
    $theme_name = next(explode('/themes/', $content));
    $current_path = '/wp-content/themes/' . $theme_name;
    $new_path = '';
    $content = str_replace($current_path, $new_path, $content);
    return $content;
}
function roots_clean_plugins($content) {
    $current_path = '/wp-content/plugins';
    $new_path = '/plugins';
    $content = str_replace($current_path, $new_path, $content);
    return $content;
}

if (!is_admin() && !in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) {
  add_filter('bloginfo_url', 'roots_root_relative_url');
  add_filter('theme_root_uri', 'roots_root_relative_url');
  add_filter('stylesheet_directory_uri', 'roots_root_relative_url');
  add_filter('template_directory_uri', 'roots_root_relative_url');
  add_filter('script_loader_src', 'roots_fix_duplicate_subfolder_urls');
  add_filter('style_loader_src', 'roots_fix_duplicate_subfolder_urls');
  add_filter('plugins_url', 'roots_root_relative_url');
  add_filter('the_permalink', 'roots_root_relative_url');
  add_filter('wp_list_pages', 'roots_root_relative_url');
  add_filter('wp_list_categories', 'roots_root_relative_url');
  add_filter('wp_nav_menu', 'roots_root_relative_url');
  add_filter('the_content_more_link', 'roots_root_relative_url');
  add_filter('the_tags', 'roots_root_relative_url');
  add_filter('get_pagenum_link', 'roots_root_relative_url');
  add_filter('get_comment_link', 'roots_root_relative_url');
  add_filter('month_link', 'roots_root_relative_url');
  add_filter('day_link', 'roots_root_relative_url');
  add_filter('year_link', 'roots_root_relative_url');
  add_filter('tag_link', 'roots_root_relative_url');
  add_filter('the_author_posts_link', 'roots_root_relative_url');
}
function roots_root_relative_url($input) {
  $output = preg_replace_callback(
    '!(https?://[^/|"]+)([^"]+)?!',
    create_function(
      '$matches',
      // if full URL is site_url, return a slash for relative root
      'if (isset($matches[0]) && $matches[0] === site_url()) { return "/";' .
      // if domain is equal to site_url, then make URL relative
      '} elseif (isset($matches[0]) && strpos($matches[0], site_url()) !== false) { return $matches[2];' .
      // if domain is not equal to site_url, do not make external link relative
      '} else { return $matches[0]; };'
    ),
    $input
  );
  return $output;
}

// workaround to remove the duplicate subfolder in the src of JS/CSS tags
// example: /subfolder/subfolder/css/style.css
function roots_fix_duplicate_subfolder_urls($input) {
  $output = roots_root_relative_url($input);
  preg_match_all('!([^/]+)/([^/]+)!', $output, $matches);
  if (isset($matches[1]) && isset($matches[2])) {
    if ($matches[1][0] === $matches[2][0]) {
      $output = substr($output, strlen($matches[1][0]) + 1);
    }
  }
  return $output;
}

// remove root relative URLs on any attachments in the feed
add_action('pre_get_posts', 'roots_root_relative_attachment_urls');
function roots_root_relative_attachment_urls() {
  if ( !is_feed() ) {
    add_filter('wp_get_attachment_url', 'roots_root_relative_url');
    add_filter('wp_get_attachment_link', 'roots_root_relative_url');
  }
}

//wp_nav_menu(array('theme_location' => 'primary_navigation', 'walker' => new roots_nav_walker()));
class roots_nav_walker extends Walker_Nav_Menu {
  function start_el(&$output, $item, $depth, $args) {
    global $wp_query;
      $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

      $slug = sanitize_title($item->title);

      $class_names = $value = '';
      $classes = empty( $item->classes ) ? array() : (array) $item->classes;

      $classes = array_filter($classes, 'roots_check_current');

      $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
      $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

      $id = apply_filters( 'nav_menu_item_id', 'menu-' . $slug, $item, $args );
      $id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';

      $output .= $indent . "\n";

      $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
      $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
      $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
      $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

      $item_output = $args->before;
      $item_output .= '';
      $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
      $item_output .= '';
      $item_output .= $args->after;

      $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
  }
}

?>