1 files changed, 103 insertions, 0 deletions
diff --git a/modules/gallery/helpers/upgrade_checker.php b/modules/gallery/helpers/upgrade_checker.php
new file mode 100644
index 00000000..ff65608b
--- /dev/null
+++ b/modules/gallery/helpers/upgrade_checker.php
@@ -0,0 +1,103 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2011 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 upgrade_checker_Core {
+  const CHECK_URL = "http://gallery.menalto.com/versioncheck/gallery3";
+  const AUTO_CHECK_INTERVAL = 604800;  // 7 days in seconds
+
+  /**
+   * Return the last version info blob retrieved from the Gallery website or
+   * null if no checks have been performed.
+   */
+  static function version_info() {
+    return unserialize(Cache::instance()->get("upgrade_checker_version_info"));
+  }
+
+  /**
+   * Return true if auto checking is enabled.
+   */
+  static function auto_check_enabled() {
+    return (bool)module::get_var("gallery", "upgrade_checker_auto_enabled");
+  }
+
+  /**
+   * Return true if it's time to auto check.
+   */
+  static function should_auto_check() {
+    if (upgrade_checker::auto_check_enabled() && random::int(1, 100) == 1) {
+      $version_info = upgrade_checker::version_info();
+      return (!$version_info || (time() - $version_info->timestamp) > AUTO_CHECK_INTERVAL);
+    }
+    return false;
+  }
+
+  /**
+   * Fech version info from the Gallery website.
+   */
+  static function fetch_version_info() {
+    $result = new stdClass();
+    try {
+      list ($status, $headers, $body) = remote::do_request(upgrade_checker::CHECK_URL);
+      if ($status == "HTTP/1.1 200 OK") {
+        $result->status = "success";
+        foreach (explode("\n", $body) as $line) {
+          if ($line) {
+            list($key, $val) = explode("=", $line, 2);
+            $result->data[$key] = $val;
+          }
+        }
+      } else {
+        $result->status = "error";
+      }
+    } catch (Exception $e) {
+      Kohana_Log::add("error",
+                      sprintf("%s in %s at line %s:\n%s", $e->getMessage(), $e->getFile(),
+                              $e->getLine(), $e->getTraceAsString()));
+    }
+    $result->timestamp = time();
+    Cache::instance()->set("upgrade_checker_version_info", serialize($result), null, 86400 * 365);
+  }
+
+  /**
+   * Check the latest version info blob to see if it's time for an upgrade.
+   */
+  static function get_upgrade_message() {
+    $version_info = upgrade_checker::version_info();
+    if ($version_info) {
+      if (gallery::RELEASE_CHANNEL == "release") {
+        if (version_compare($version_info->data["release_version"], gallery::VERSION, ">")) {
+          return t("A newer version of Gallery is available! <a href=\"%upgrade-url\">Upgrade now</a> to version %version",
+                   array("version" => $version_info->data["release_version"],
+                         "upgrade-url" => $version_info->data["release_upgrade_url"]));
+        }
+      } else {
+        $branch = gallery::RELEASE_BRANCH;
+        if (isset($version_info->data["branch_{$branch}_build_number"]) &&
+            version_compare($version_info->data["branch_{$branch}_build_number"],
+                            gallery::build_number(), ">")) {
+          return t("A newer version of Gallery is available! <a href=\"%upgrade-url\">Upgrade now</a> to version %version (build %build on branch %branch)",
+                   array("version" => $version_info->data["branch_{$branch}_version"],
+                         "upgrade-url" => $version_info->data["branch_{$branch}_upgrade_url"],
+                         "build" => $version_info->data["branch_{$branch}_build_number"],
+                         "branch" => $branch));
+        }
+      }
+    }
+  }
+}