Use the block_manager to manage site sidebar panels. Fixes ticket #110.

* Extend block_manager to handle sidebar blocks. get_available has become get_available_admin_blocks, get_list becomes get_admin_list.
* Create new functions get_available_site_blocks which will look for gallery_block get_available_site_blocks.
* Refactor sidebar_blocks into a separate function and then call block_manager::get_html(site.sidebar). Convert image_block to use block management instead of theme::sidebar_blocks
* Change the block_manager api so that the theme is passed into the get method. convert info to the new sidebar block approach
* Convert the user module to use the new sidebar block structure. remove the installers for info and image_block modules.
* Convert tag and rss modules to the new sidebar framework. reset the version number to 1 for info and image_block modules.
* Change the get_html method to ignore empty blocks and change the individual handlers to return an empty string if no block is generated
* Add a warning message if no sidebar blocks are active and provide a link to the admin page that configures the sidebar.

2 files changed, 46 insertions, 17 deletions

diff --git a/modules/user/helpers/user_block.php b/modules/user/helpers/user_block.php
new file mode 100644
index 00000000..e7671f06
--- /dev/null
+++ b/modules/user/helpers/user_block.php
@@ -0,0 +1,46 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2009 Bharat Mediratta
+ *
+ * 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 Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class user_block_Core {
+  static function get_site_list() {
+    return array("language" => t("Language Preference"));
+  }
+
+  static function get($block_id, $theme) {
+    $block = "";
+    switch ($block_id) {
+    case "language":
+      $locales = locales::installed();
+      foreach ($locales as $locale => $display_name) {
+        $locales[$locale] = SafeString::of_safe_html($display_name);
+      }
+      if (count($locales) > 1) {
+        $block = new Block();
+        $block->css_id = "gUserLanguageBlock";
+        $block->title = t("Language Preference");
+        $block->content = new View("user_languages_block.html");
+        $block->content->installed_locales =
+          array_merge(array("" => t("« none »")), $locales);
+        $block->content->selected = (string) user::cookie_locale();
+      }
+      break;
+    }
+    return $block;
+  }
+}
\ No newline at end of file
diff --git a/modules/user/helpers/user_theme.php b/modules/user/helpers/user_theme.php
index 098d87fd..69d63eaf 100644
--- a/modules/user/helpers/user_theme.php
+++ b/modules/user/helpers/user_theme.php
@@ -33,21 +33,4 @@ class user_theme_Core {
       return $view->render();
     }
   }
-
-  static function sidebar_blocks($theme) {
-    $locales = locales::installed();
-    foreach ($locales as $locale => $display_name) {
-      $locales[$locale] = SafeString::of_safe_html($display_name);
-    }
-    if (count($locales) > 1) {
-      $block = new Block();
-      $block->css_id = "gUserLanguageBlock";
-      $block->title = t("Language Preference");
-      $block->content = new View("user_languages_block.html");
-      $block->content->installed_locales =
-        array_merge(array("" => t("« none »")), $locales);
-      $block->content->selected = (string) user::cookie_locale();
-      return $block;
-    }
-  }
 }