Changeset 4556

Timestamp:

11/30/2006 08:48:56 AM (18 years ago)

Author:

markjaquith

Message:

Remember old post slugs and automatically redirect to the new slug. fixes #3202

Location:

trunk

Files:

• wp-admin/admin-functions.php (modified) (1 diff)
• wp-admin/upgrade-functions.php (modified) (2 diffs)
• wp-includes/default-filters.php (modified) (1 diff)
• wp-includes/query.php (modified) (1 diff)
• wp-includes/version.php (modified) (1 diff)

trunk/wp-admin/admin-functions.php

@@ -2070 +2070 @@
 }
 
+
+function wp_check_for_changed_slugs($post_id) {
+    if ( !strlen($_POST['wp-old-slug']) )
+        return $post_id;
+
+    $post = &get_post($post_id);
+
+    // we're only concerned with published posts
+    if ( $post->post_status != 'publish' || $post->post_type != 'post' )
+        return $post_id;
+
+    // only bother if the slug has changed
+    if ( $post->post_name == $_POST['wp-old-slug'] )
+        return $post_id;
+
+    $old_slugs = get_post_meta($post_id, '_wp_old_slug');
+
+    // if we haven't added this old slug before, add it now
+    if ( !count($old_slugs) || !in_array($_POST['wp-old-slug'], $old_slugs) )
+        add_post_meta($post_id, '_wp_old_slug', $_POST['wp-old-slug']);
+
+    // if the new slug was used previously, delete it from the list
+    if ( in_array($post->post_name, $old_slugs) )
+        delete_post_meta($post_id, '_wp_old_slug', $post->post_name);
+
+    return $post_id;
+}
+
+
+function wp_remember_old_slug() {
+    global $post;
+    $name = wp_specialchars($post->post_name); // just in case
+    if ( strlen($name) )
+        echo '<input type="hidden" id="wp-old-slug" name="wp-old-slug" value="' . $name . '" />';
+}
+
+
 // If siteurl or home changed, reset cookies and flush rewrite rules.
 function update_home_siteurl( $old_value, $value ) {

trunk/wp-admin/upgrade-functions.php

@@ -175 +175 @@
     if ( $wp_current_db_version < 3845 )
         upgrade_210();
+
+    if ( $wp_current_db_version < 4351 )
+        upgrade_old_slugs();
 
     $wp_rewrite->flush_rules();
@@ -544 +547 @@
     }
 }
+
+function upgrade_old_slugs() {
+    // upgrade people who were using the Redirect Old Slugs plugin
+    global $wpdb;
+    $wpdb->query("UPDATE $wpdb->postmeta SET meta_key = '_wp_old_slug' WHERE meta_key = 'old_slug'");
+}
+
 
 // The functions we use to actually do stuff

trunk/wp-includes/default-filters.php

@@ -147 +147 @@
 add_filter('mce_buttons', '_mce_add_direction_buttons');
 
+// Redirect Old Slugs
+add_action('template_redirect', 'wp_old_slug_redirect');
+add_action('edit_post', 'wp_check_for_changed_slugs');
+add_action('edit_form_advanced', 'wp_remember_old_slug');
+
 // Actions
 add_action('wp_head', 'rsd_link');

trunk/wp-includes/query.php

@@ -1117 +1117 @@
 }
 
+
+// Redirect old slugs
+function wp_old_slug_redirect () {
+    global $wp_query;
+    if ( is_404() && '' != $wp_query->query_vars['name'] ) :
+        global $wpdb;
+
+        $query = "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND meta_key = '_wp_old_slug' AND meta_value='" . $wp_query->query_vars['name'] . "'";
+
+        // if year, monthnum, or day have been specified, make our query more precise
+        // just in case there are multiple identical _wp_old_slug values
+        if ( '' != $wp_query->query_vars['year'] )
+            $query .= " AND YEAR(post_date) = '{$wp_query->query_vars['year']}'";
+        if ( '' != $wp_query->query_vars['monthnum'] )
+            $query .= " AND MONTH(post_date) = '{$wp_query->query_vars['monthnum']}'";
+        if ( '' != $wp_query->query_vars['day'] )
+            $query .= " AND DAYOFMONTH(post_date) = '{$wp_query->query_vars['day']}'";
+
+        $id = (int) $wpdb->get_var($query);
+
+        if ( !$id )
+            return;
+
+        $link = get_permalink($id);
+
+        if ( !$link )
+            return;
+
+        wp_redirect($link, '301'); // Permanent redirect
+        exit;
+    endif;
+}
+
+
 //
 // Private helper functions

trunk/wp-includes/version.php

@@ -4 +4 @@
 
 $wp_version = '2.1-alpha3';
-$wp_db_version = 4350;
+$wp_db_version = 4351;
 
 ?>