From f87e1de3ec0b199a48818f84bdef4cdf34b50244 Mon Sep 17 00:00:00 2001
From: Tim Almdal <tnalmdal@shaw.ca>
Date: Thu, 26 Feb 2009 15:02:04 +0000
Subject: Implement a random image block for the side bar.  Ticket #13

---
 .../image_block/helpers/image_block_installer.php  | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 modules/image_block/helpers/image_block_installer.php

(limited to 'modules/image_block/helpers/image_block_installer.php')

diff --git a/modules/image_block/helpers/image_block_installer.php b/modules/image_block/helpers/image_block_installer.php
new file mode 100644
index 00000000..6b0ec20b
--- /dev/null
+++ b/modules/image_block/helpers/image_block_installer.php
@@ -0,0 +1,42 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 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 image_block_installer {
+  static function install() {
+    $db = Database::instance();
+    $version = module::get_version("image_block");
+    if ($version == 0) {
+      $db = Database::instance();
+      
+      $db->query("ALTER TABLE `items` ADD `rand_key` FLOAT DEFAULT NULL");
+      $db->query("UPDATE `items` SET `rand_key` = RAND()");
+      $db->query("CREATE INDEX `random_index` ON `items` (rand_key DESC)");
+
+      module::set_version("image_block", 1);
+    }
+  }
+
+  static function uninstall() {
+    $db = Database::instance();
+    // Dropping the column should drop the index as well.
+    $db->query("ALTER TABLE `items` DROP `rand_key`");
+
+    module::delete("image_block");
+  }
+}
-- 
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