Convert the Simple Uploader form over to Forge, and use the event

model to let the Tags module modify it.  This brings it inline with
our other module-extensible form based interactions.

modules/gallery/libraries/Form_Uploadify.php

@@ -0,0 +1,54 @@
+<?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 Form_Uploadify_Core extends Form_Input {
+  protected $data = array(
+    "name" => false,
+    "type"  => "UNKNOWN",
+    "url" => "",
+    "text" => "");
+
+  public function __construct($name) {
+    parent::__construct($name);
+    $this->data["script_data"] = array(
+      "g3sid" => Session::instance()->id(),
+      "user_agent" => Input::instance()->server("HTTP_USER_AGENT"),
+      "csrf" => access::csrf_token());
+  }
+
+  public function album(Item_Model $album) {
+    $this->data["album"] = $album;
+    return $this;
+  }
+
+  public function script_data($key, $value) {
+    $this->data["script_data"][$key] = $value;
+  }
+
+  public function render() {
+    $v = new View("form_uploadify.html");
+    $v->album = $this->data["album"];
+    $v->script_data = $this->data["script_data"];
+    return $v;
+  }
+
+  public function validate() {
+    return true;
+  }
+}