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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
** Actions and filters
**
**/
/**
* Filter to replace the post permalink with the custom one
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_post_link($permalink, $post) {
$custom_permalink = get_post_meta( $post->ID, 'custom_permalink', true );
if ( $custom_permalink ) {
return get_home_url()."/".$custom_permalink;
}
return $permalink;
}
/**
* Filter to replace the page permalink with the custom one
*
* @package CustomPermalinks
* @since 0.4
*/
function custom_permalinks_page_link($permalink, $page) {
$custom_permalink = get_post_meta( $page, 'custom_permalink', true );
if ( $custom_permalink ) {
return get_home_url()."/".$custom_permalink;
}
return $permalink;
}
/**
* Filter to replace the term permalink with the custom one
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_term_link($permalink, $term) {
$table = get_option('custom_permalink_table');
if ( is_object($term) ) $term = $term->term_id;
$custom_permalink = custom_permalinks_permalink_for_term($term);
if ( $custom_permalink ) {
return get_home_url()."/".$custom_permalink;
}
return $permalink;
}
/**
* Action to redirect to the custom permalink
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_redirect() {
// Get request URI, strip parameters
$url = parse_url(get_bloginfo('url'));
$url = isset($url['path']) ? $url['path'] : '';
$request = ltrim(substr($_SERVER['REQUEST_URI'], strlen($url)),'/');
if ( ($pos=strpos($request, "?")) ) $request = substr($request, 0, $pos);
global $wp_query;
$custom_permalink = '';
$original_permalink = '';
// If the post/tag/category we're on has a custom permalink, get it and check against the request
if ( is_single() || is_page() ) {
$post = $wp_query->post;
$custom_permalink = get_post_meta( $post->ID, 'custom_permalink', true );
$original_permalink = ( $post->post_type == 'page' ? custom_permalinks_original_page_link( $post->ID ) : custom_permalinks_original_post_link( $post->ID ) );
} else if ( is_tag() || is_category() ) {
$theTerm = $wp_query->get_queried_object();
$custom_permalink = custom_permalinks_permalink_for_term($theTerm->term_id);
$original_permalink = (is_tag() ? custom_permalinks_original_tag_link($theTerm->term_id) :
custom_permalinks_original_category_link($theTerm->term_id));
}
if ( $custom_permalink &&
(substr($request, 0, strlen($custom_permalink)) != $custom_permalink ||
$request == $custom_permalink."/" ) ) {
// Request doesn't match permalink - redirect
$url = $custom_permalink;
if ( substr($request, 0, strlen($original_permalink)) == $original_permalink &&
trim($request,'/') != trim($original_permalink,'/') ) {
// This is the original link; we can use this url to derive the new one
$url = preg_replace('@//*@', '/', str_replace(trim($original_permalink,'/'), trim($custom_permalink,'/'), $request));
$url = preg_replace('@([^?]*)&@', '\1?', $url);
}
// Append any query compenent
$url .= strstr($_SERVER['REQUEST_URI'], "?");
wp_redirect( get_home_url()."/".$url, 301 );
exit();
}
}
/**
* Filter to rewrite the query if we have a matching post
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_request($query) {
global $wpdb;
global $_CPRegisteredURL;
// First, search for a matching custom permalink, and if found, generate the corresponding
// original URL
$originalUrl = NULL;
// Get request URI, strip parameters and /'s
$url = parse_url(get_bloginfo('url'));
$url = isset($url['path']) ? $url['path'] : '';
$request = ltrim(substr($_SERVER['REQUEST_URI'], strlen($url)),'/');
$request = (($pos=strpos($request, '?')) ? substr($request, 0, $pos) : $request);
$request_noslash = preg_replace('@/+@','/', trim($request, '/'));
if ( !$request ) return $query;
$sql = "SELECT $wpdb->posts.ID, $wpdb->postmeta.meta_value, $wpdb->posts.post_type FROM $wpdb->posts ".
"LEFT JOIN $wpdb->postmeta ON ($wpdb->posts.ID = $wpdb->postmeta.post_id) WHERE ".
" meta_key = 'custom_permalink' AND ".
" meta_value != '' AND ".
" ( LOWER(meta_value) = LEFT(LOWER('".mysql_escape_string($request_noslash)."'), LENGTH(meta_value)) OR ".
" LOWER(meta_value) = LEFT(LOWER('".mysql_escape_string($request_noslash."/")."'), LENGTH(meta_value)) ) ".
"ORDER BY LENGTH(meta_value) DESC LIMIT 1";
$posts = $wpdb->get_results($sql);
if ( $posts ) {
// A post matches our request
// Preserve this url for later if it's the same as the permalink (no extra stuff)
if ( $request_noslash == trim($posts[0]->meta_value,'/') )
$_CPRegisteredURL = $request;
$originalUrl = preg_replace( '@/+@', '/', str_replace( trim( strtolower($posts[0]->meta_value),'/' ),
( $posts[0]->post_type == 'page' ?
custom_permalinks_original_page_link($posts[0]->ID)
: custom_permalinks_original_post_link($posts[0]->ID) ),
strtolower($request_noslash) ) );
}
if ( $originalUrl === NULL ) {
// See if any terms have a matching permalink
$table = get_option('custom_permalink_table');
if ( !$table ) return $query;
foreach ( array_keys($table) as $permalink ) {
if ( $permalink == substr($request_noslash, 0, strlen($permalink)) ||
$permalink == substr($request_noslash."/", 0, strlen($permalink)) ) {
$term = $table[$permalink];
// Preserve this url for later if it's the same as the permalink (no extra stuff)
if ( $request_noslash == trim($permalink,'/') )
$_CPRegisteredURL = $request;
if ( $term['kind'] == 'category') {
$originalUrl = str_replace(trim($permalink,'/'),
custom_permalinks_original_category_link($term['id']),
trim($request,'/'));
} else {
$originalUrl = str_replace(trim($permalink,'/'),
custom_permalinks_original_tag_link($term['id']),
trim($request,'/'));
}
}
}
}
if ( $originalUrl !== NULL ) {
$originalUrl = str_replace('//', '/', $originalUrl);
if ( ($pos=strpos($_SERVER['REQUEST_URI'], '?')) !== false ) {
$queryVars = substr($_SERVER['REQUEST_URI'], $pos+1);
$originalUrl .= (strpos($originalUrl, '?') === false ? '?' : '&') . $queryVars;
}
// Now we have the original URL, run this back through WP->parse_request, in order to
// parse parameters properly. We set $_SERVER variables to fool the function.
$oldRequestUri = $_SERVER['REQUEST_URI']; $oldQueryString = $_SERVER['QUERY_STRING'];
$_SERVER['REQUEST_URI'] = '/'.ltrim($originalUrl,'/');
$_SERVER['QUERY_STRING'] = (($pos=strpos($originalUrl, '?')) !== false ? substr($originalUrl, $pos+1) : '');
parse_str($_SERVER['QUERY_STRING'], $queryArray);
$oldValues = array();
if ( is_array($queryArray) )
foreach ( $queryArray as $key => $value ) {
$oldValues[$key] = $_REQUEST[$key];
$_REQUEST[$key] = $_GET[$key] = $value;
}
// Re-run the filter, now with original environment in place
remove_filter( 'request', 'custom_permalinks_request', 10, 1 );
global $wp;
$wp->parse_request();
$query = $wp->query_vars;
add_filter( 'request', 'custom_permalinks_request', 10, 1 );
// Restore values
$_SERVER['REQUEST_URI'] = $oldRequestUri; $_SERVER['QUERY_STRING'] = $oldQueryString;
foreach ( $oldValues as $key => $value ) {
$_REQUEST[$key] = $value;
}
}
return $query;
}
/**
* Filter to handle trailing slashes correctly
*
* @package CustomPermalinks
* @since 0.3
*/
function custom_permalinks_trailingslash($string, $type) {
global $_CPRegisteredURL;
$url = parse_url(get_bloginfo('url'));
$request = ltrim(substr($string, strlen($url['path'])),'/');
if ( !trim($request) ) return $string;
if ( trim($_CPRegisteredURL,'/') == trim($request,'/') ) {
return ($string{0} == '/' ? '/' : '') . trailingslashit($url['path']) . $_CPRegisteredURL;
}
return $string;
}
/**
** Administration
**
**/
/**
* Per-post/page options (Wordpress > 2.9)
*
* @package CustomPermalinks
* @since 0.6
*/
function custom_permalink_get_sample_permalink_html($html, $id, $new_title, $new_slug) {
$permalink = get_post_meta( $id, 'custom_permalink', true );
$post = &get_post($id);
if ( preg_match("@view-post-btn.*?href='([^']+)'@s", $html, $matches) ) {
$permalink = $matches[1];
} else {
list($permalink, $post_name) = get_sample_permalink($post->ID, $new_title, $new_slug);
if ( false !== strpos($permalink, '%postname%') || false !== strpos($permalink, '%pagename%') ) {
$permalink = str_replace(array('%pagename%','%postname%'), $post_name, $permalink);
}
}
ob_start();
custom_permalinks_form($permalink, ($post->post_type == "page" ? custom_permalinks_original_page_link($id) : custom_permalinks_original_post_link($id)), false, $post->ID);
$content = ob_get_contents();
ob_end_clean();
if ( 'publish' == $post->post_status ) {
$view_post = 'page' == $post->post_type ? __('View Page') : __('View Post');
}
return '' . __('Permalink:') . "\n" . $content .
( isset($view_post) ? "$view_post\n" : "" );
}
/**
* Per-post options (Wordpress < 2.9)
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_post_options() {
global $post;
$post_id = $post;
if (is_object($post_id)) {
$post_id = $post_id->ID;
}
$permalink = get_post_meta( $post_id, 'custom_permalink', true );
?>
term_id);
if ( $object->term_id ) {
$originalPermalink = ($object->taxonomy == 'post_tag' ?
custom_permalinks_original_tag_link($object->term_id) :
custom_permalinks_original_category_link($object->term_id) );
}
custom_permalinks_form($permalink, $originalPermalink);
// Move the save button to above this form
wp_enqueue_script('jquery');
?>
/
term_id);
$table = get_option('custom_permalink_table');
if ( $permalink )
$table[$permalink] = array(
'id' => $term->term_id,
'kind' => ($term->taxonomy == 'category' ? 'category' : 'tag'),
'slug' => $term->slug);
update_option('custom_permalink_table', $table);
}
/**
* Delete post
*
* @package CustomPermalinks
* @since 0.7.14
* @author Piero
*/
function custom_permalinks_delete_permalink( $id ){
global $wpdb;
$wpdb->query("DELETE FROM $wpdb->postmeta WHERE `meta_key` = 'custom_permalink' AND `post_id` = '".mysql_escape_string($id)."'");
}
/**
* Delete term
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_delete_term($id) {
$table = get_option('custom_permalink_table');
if ( $table )
foreach ( $table as $link => $info ) {
if ( $info['id'] == $id ) {
unset($table[$link]);
break;
}
}
update_option('custom_permalink_table', $table);
}
/**
* Options page
*
* @package CustomPermalinks
* @since 0.1
*/
function custom_permalinks_options_page() {
// Handle revert
if ( isset($_REQUEST['revertit']) && isset($_REQUEST['revert']) ) {
check_admin_referer('custom-permalinks-bulk');
foreach ( (array)$_REQUEST['revert'] as $identifier ) {
list($kind, $id) = explode('.', $identifier);
switch ( $kind ) {
case 'post':
case 'page':
delete_post_meta( $id, 'custom_permalink' );
break;
case 'tag':
case 'category':
custom_permalinks_delete_term($id);
break;
}
}
// Redirect
$redirectUrl = $_SERVER['REQUEST_URI'];
?>