3 files changed, 15 insertions, 15 deletions

diff --git a/modules/gallery/helpers/block_manager.php b/modules/gallery/helpers/block_manager.php
index bd6ca1c8..a2279468 100644
--- a/modules/gallery/helpers/block_manager.php
+++ b/modules/gallery/helpers/block_manager.php
@@ -35,7 +35,7 @@ class block_manager_Core {
 
   static function activate_blocks($module_name) {
     $block_class = "{$module_name}_block";
-    if (method_exists($block_class, "get_site_list")) {
+    if (class_exists($block_class) && method_exists($block_class, "get_site_list")) {
       $blocks = call_user_func(array($block_class, "get_site_list"));
       foreach (array_keys($blocks) as $block_id) {
         block_manager::add("site_sidebar", $module_name, $block_id);
@@ -61,14 +61,14 @@ class block_manager_Core {
 
   static function deactivate_blocks($module_name) {
     $block_class = "{$module_name}_block";
-    if (method_exists($block_class, "get_site_list")) {
+    if (class_exists($block_class) && method_exists($block_class, "get_site_list")) {
       $blocks = call_user_func(array($block_class, "get_site_list"));
       foreach  (array_keys($blocks) as $block_id) {
         block_manager::remove_blocks_for_module("site_sidebar", $module_name);
       }
     }
 
-    if (method_exists($block_class, "get_admin_list")) {
+    if (class_exists($block_class) && method_exists($block_class, "get_admin_list")) {
       $blocks = call_user_func(array($block_class, "get_admin_list"));
       foreach (array("dashboard_sidebar", "dashboard_center") as $location) {
         block_manager::remove_blocks_for_module($location, $module_name);
@@ -89,7 +89,7 @@ class block_manager_Core {
 
     foreach (module::active() as $module) {
       $class_name = "{$module->name}_block";
-      if (method_exists($class_name, $function)) {
+      if (class_exists($class_name) && method_exists($class_name, $function)) {
         foreach (call_user_func(array($class_name, $function)) as $id => $title) {
           $blocks["{$module->name}:$id"] = $title;
         }
@@ -102,7 +102,7 @@ class block_manager_Core {
     $active = block_manager::get_active($location);
     $result = "";
     foreach ($active as $id => $desc) {
-      if (method_exists("$desc[0]_block", "get")) {
+      if (class_exists("$desc[0]_block") && method_exists("$desc[0]_block", "get")) {
         $block = call_user_func(array("$desc[0]_block", "get"), $desc[1], $theme);
         if (!empty($block)) {
           $block->id = $id;
diff --git a/modules/gallery/helpers/module.php b/modules/gallery/helpers/module.php
index d7429121..da201d20 100644
--- a/modules/gallery/helpers/module.php
+++ b/modules/gallery/helpers/module.php
@@ -141,7 +141,7 @@ class module_Core {
     $messages = array();
 
     $installer_class = "{$module_name}_installer";
-    if (method_exists($installer_class, "can_activate")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "can_activate")) {
       $messages = call_user_func(array($installer_class, "can_activate"));
     }
 
@@ -173,7 +173,7 @@ class module_Core {
     module::_add_to_path($module_name);
 
     $installer_class = "{$module_name}_installer";
-    if (method_exists($installer_class, "install")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "install")) {
       call_user_func_array(array($installer_class, "install"), array());
     }
     module::set_version($module_name, module::available()->$module_name->code_version);
@@ -226,7 +226,7 @@ class module_Core {
     $version_before = module::get_version($module_name);
     $installer_class = "{$module_name}_installer";
     $available = module::available();
-    if (method_exists($installer_class, "upgrade")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "upgrade")) {
       call_user_func_array(array($installer_class, "upgrade"), array($version_before));
     } else {
       if (isset($available->$module_name->code_version)) {
@@ -261,7 +261,7 @@ class module_Core {
     module::_add_to_path($module_name);
 
     $installer_class = "{$module_name}_installer";
-    if (method_exists($installer_class, "activate")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "activate")) {
       call_user_func_array(array($installer_class, "activate"), array());
     }
 
@@ -288,7 +288,7 @@ class module_Core {
    */
   static function deactivate($module_name) {
     $installer_class = "{$module_name}_installer";
-    if (method_exists($installer_class, "deactivate")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "deactivate")) {
       call_user_func_array(array($installer_class, "deactivate"), array());
     }
 
@@ -314,7 +314,7 @@ class module_Core {
    */
   static function uninstall($module_name) {
     $installer_class = "{$module_name}_installer";
-    if (method_exists($installer_class, "uninstall")) {
+    if (class_exists($installer_class) && method_exists($installer_class, "uninstall")) {
       call_user_func(array($installer_class, "uninstall"));
     }
 
@@ -403,7 +403,7 @@ class module_Core {
         continue;
       }
       $class = "{$module->name}_event";
-      if (method_exists($class, $function)) {
+      if (class_exists($class) && method_exists($class, $function)) {
         call_user_func_array(array($class, $function), $args);
       }
     }
@@ -411,7 +411,7 @@ class module_Core {
     // Give the admin theme a chance to respond, if we're in admin mode.
     if (theme::$is_admin) {
       $class = theme::$admin_theme_name . "_event";
-      if (method_exists($class, $function)) {
+      if (class_exists($class) && method_exists($class, $function)) {
         call_user_func_array(array($class, $function), $args);
       }
     }
@@ -419,7 +419,7 @@ class module_Core {
     // Give the site theme a chance to respond as well.  It gets a chance even in admin mode, as
     // long as the theme has an admin subdir.
     $class = theme::$site_theme_name . "_event";
-    if (method_exists($class, $function)) {
+    if (class_exists($class) && method_exists($class, $function)) {
       call_user_func_array(array($class, $function), $args);
     }
   }
diff --git a/modules/gallery/helpers/task.php b/modules/gallery/helpers/task.php
index 32fd9739..5638faf4 100644
--- a/modules/gallery/helpers/task.php
+++ b/modules/gallery/helpers/task.php
@@ -25,7 +25,7 @@ class task_Core {
     $tasks = array();
     foreach (module::active() as $module) {
       $class_name = "{$module->name}_task";
-      if (method_exists($class_name, "available_tasks")) {
+      if (class_exists($class_name) && method_exists($class_name, "available_tasks")) {
         foreach (call_user_func(array($class_name, "available_tasks")) as $task) {
           $tasks[$task->callback] = $task;
         }