<?php
/******************************************************************************************************************

Plugin Name: sitewide_tags_permalink_replace
Plugin URI: http://heftagaub.wordpress.com/2007/03/17/sitewide-tags-for-wpmu-without-core-changes/

Description: Simple WordPress plugin for to be used in conjunction with Dr. Mike's sitewide tag/search solution. This plugin allows you to properly replace the perma link for a mirrored wordpressmu install without making core code changes.

Version: 0.42.1

Author: Brad Hefta-Gaub

Author URI: http://heftagaub.wordpress.com/

Copyright: (c) 2007 Brad Hefta-Gaub

License:    

            THE WORK IS PROVIDED UNDER THE TERMS OF THIS CREATIVE COMMONS PUBLIC LICENSE ("CCPL" OR 
            "LICENSE"). THE WORK IS PROTECTED BY COPYRIGHT AND/OR OTHER APPLICABLE LAW. ANY USE 
            OF THE WORK OTHER THAN AS AUTHORIZED UNDER THIS LICENSE OR COPYRIGHT LAW IS PROHIBITED.

                            Attribution-NonCommercial-ShareAlike 3.0 Unported
                            
            You are free:

                * to Share — to copy, distribute and transmit the work
                * to Remix — to adapt the work

            Under the following conditions:

                * Attribution. You must attribute the work in the manner specified by the author or 
                  licensor (but not in any way that suggests that they endorse you or your use of the work).
                  
                * Noncommercial. You may not use this work for commercial purposes.
                
                * Share Alike. If you alter, transform, or build upon this work, you may distribute 
                  the resulting work only under the same or similar license to this one.

                * For any reuse or distribution, you must make clear to others the license terms of 
                  this work. The best way to do this is with a link to this web page.
                  
                * Any of the above conditions can be waived if you get permission from the copyright holder.
                
                * Nothing in this license impairs or restricts the author's moral rights.


            The complete license can be found here: http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode


            My reasoning behind this license choice is as follows:

                * I intend for these posts to be informative and educational. They are not intended to 
                  be fully functioning implementations. They are intended to represent reusable ideas. 
                  Therefore, you shouldn’t need more than this license to learn from what I’m presenting here.
                  
                * If you are planning on using this as is, then I would like you to give me the appropriate 
                  level of credit. And if you see me on the street, please introduce yourself and say "Thanks Man!"
                  
                * If you are want to use this code as is for commercial purposes, then, well, contact me. 
                  I make my living as a technologist, and if you’re making money off my hard work, then I want 
                  some control over that. That being said, I don’t mind teaching you what I’ve learned, and 
                  so please feel free to read my code, learn from it, and go about your business as you see fit.
                  But you can't use this code for commercial purposes without contacting me first.

            If you like this code, and you run into me in person, then you should say, "Hey Zappo, that 
            was cool code, I learned something from it, it helped me out. Thanks!", and offer to buy 
            me a beer or a coffee depending on what we're both in the mood for at the time. 
            
            Please may not remove this copyright and license message.
            
            THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
            BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
            NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
            DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
            OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

History:    
            0.42.1 - Released under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

            0.42   - Original Version

*******************************************************************************************************************/

/*
 * This hook will be called when the post link needs to be rewritten.
 * We want to be called last, and we want to get the permalink and the post
 * object passed to us.
 */
add_filter('post_link', 'replace_permalink',10 /* priority */ ,2 /* num params */);

/*
 * Returns the $post->guid as the permalink. This works because the wp-autoblog
 * changes store the actual guid to the original post for the posts guid.
 */
function replace_permalink($permalink, $post)
{
    return $post->guid;
}

?>