wp-no-taxonomy-base.php

<?php

/*
Plugin Name: WP No Taxonomy Base
Plugin URI: 
Description: Remove base slug from your custom taxonomy terms.
Author: <a href="http://twitter.com/luk3thomas">@luk3thomas</a> & <a href="http://twitter.com/DavidDiGiovanni">@DavidDiGiovanni</a>
Version: 1.0
*/

/*
    Copyright 2012 Luke Thomas (email: luk3thomas at gmail.com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

class WP_No_Taxonomy_Base {

  public function __construct() {

    add_action('admin_menu'             , array($this , 'add_page'    )  ) ;
    add_action('created_category'       , array($this , 'flush_rules' )  ) ;
    add_action('delete_category'        , array($this , 'flush_rules' )  ) ;
    add_action('edited_category'        , array($this , 'flush_rules' )  ) ;
    add_action('init'                   , array($this , 'redirect'    )  ) ;

    add_filter('category_rewrite_rules' , array($this , 'add_rules'   )  ) ;


  }

  public function flush_rules() {

    global $wp_rewrite;
    $wp_rewrite->flush_rules();

  }

  public function redirect() {
    $request    = $_SERVER['REQUEST_URI'];
    $host       = $_SERVER['HTTP_HOST'];
    $redirect   = false;
    $blogurl    = get_bloginfo('url');
    $taxonomies = get_option('WP_No_Taxonomy_Base');
    $http       = ( strrpos($blogurl, 'https://') === false ) ? 'http://' : 'https://';

    /** Bail */
    if(!$taxonomies)
      return false;

    /** build the URL */
    $url = $http . $host . $request;

    foreach( $taxonomies as $term ) {

      /**
       * If the url contains a taxonomy term base
       * then redirect it to the new page.
       * Only redirect one time.
       * -------------------------------------------- */
      if( strrpos($url, '/' . $term . '/') && !$redirect) {

        $new_url = str_replace('/' . $term . '/', '/', $url);

        wp_redirect($new_url, 301);

        $redirect = true;

      }

    }

  }

  public function add_rules($rules) {

    /**
     * @todo 
     *
     * Create rewrite rules for terms when 
     * they are nested under a parent term.
     *
     * Example: 
     * http://#{base_url}/#{parent_term}/#{child_term}
     *
     * -------------------------------------------- */

    $taxonomies = get_option('WP_No_Taxonomy_Base');

    /** Time to bail. */
    if(!$taxonomies)
      return $rules;


    $args  = array('hide_empty' => false);

    /**
     * Loop em.
     * -------------------------------------------- */
    foreach( $taxonomies as $taxonomy ) {

      $categories = get_terms($taxonomy, $args);

      foreach($categories as $category) {

        $slug = $category->slug;

        $feed_rule  = sprintf('index.php?taxonomy=%s&term=%s&feed=$matches[1]'  , $taxonomy , $slug);
        $paged_rule = sprintf('index.php?taxonomy=%s&term=%s&paged=$matches[1]' , $taxonomy , $slug);
        $base_rule  = sprintf('index.php?taxonomy=%s&term=%s'                   , $taxonomy , $slug);

        $rules[$slug . '/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$'] = $feed_rule;
        $rules[$slug . '/page/?([0-9]{1,})/?$']                  = $paged_rule;
        $rules[$slug . '/?$']                                    = $base_rule;

      }

    }

    return $rules;

  }

  public function add_page() {

    add_submenu_page('options-general.php', 'WP No Taxonomy Base', 'WP No Taxonomy Base', 'manage_options', 'wp-no-taxonomy-base', array($this, 'show_page'));

  }

  public function show_page() {

     /** @todo internationalization */
     /** @todo make frontend look better */
     /** @todo UX - notifications after an update */

    if(!current_user_can('manage_options'))
      wp_die( __('You do not have sufficient permissions to access this page.') );

    if($_POST['vesave'] == 'save') {

      update_option( 'WP_No_Taxonomy_Base', $_POST['WP_No_Taxonomy_Base'] );

      $this->flush_rules();

    }

    $taxonomies = get_taxonomies( array('public' => true) ); 
    $selected = get_option('WP_No_Taxonomy_Base');

    if(!$selected)
      $selected = array();

 ?>
  <div class="wrap">

    <h1>WP No Taxonomy Base</h1>

    <p>Want to remove the base for a taxonomy? Just select the taxonomy below and click "Save".</p>

    <form method="post">

      <input type="hidden" name="vesave" value="save" />

      <table>

      <?php 
        
        foreach( $taxonomies as $taxonomy ) {

          $active = in_array($taxonomy, $selected) ? 'checked="checked"' : '';

          printf(
          '
            <tr>
              <td> <label>%s</label> </td>
              <td> <input type="checkbox" name="WP_No_Taxonomy_Base[]" value="%s" %s /> </td>
            </tr>
          '
          , $taxonomy
          , $taxonomy
          , $active
          );

        }
      
      ?>

      </table>

      <button class="button-primary">Save</button>

    </form>

  </div>

  <?php

  }

}

$no_base = new WP_No_Taxonomy_Base();