Create a UI under Admin > Settings > Comments where you can limit

comments only to registered users.  It's simplistic, but is better
than adding a permission since generally this setting will be used
Gallery-wide.

Fixes ticket #1002

modules/comment/controllers/admin_comments.php

@@ -0,0 +1,52 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2010 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 Admin_Comments_Controller extends Admin_Controller {
+  public function index() {
+    $view = new Admin_View("admin.html");
+    $view->page_title = t("Comment settings");
+    $view->content = new View("admin_comments.html");
+    $view->content->form = $this->_get_admin_form();
+    print $view;
+  }
+
+  public function save() {
+    access::verify_csrf();
+    $form = $this->_get_admin_form();
+    $form->validate();
+    module::set_var("comment", "access_permissions",
+                    $form->comment_settings->access_permissions->value);
+    message::success(t("Comment settings updated"));
+    url::redirect("admin/comments");
+  }
+
+  private function _get_admin_form() {
+    $form = new Forge("admin/comments/save", "", "post",
+                      array("id" => "g-comments-admin-form"));
+    $comment_settings = $form->group("comment_settings")->label(t("Permissions"));
+    $comment_settings->dropdown("access_permissions")
+      ->label(t("Who can leave comments?"))
+      ->options(array("everybody" => t("Everybody"),
+                      "registered_users" => t("Only registered users")))
+      ->selected(module::get_var("comment", "access_permissions"));
+    $comment_settings->submit("save")->value(t("Save"));
+    return $form;
+  }
+}
+

modules/comment/controllers/comments.php

@@ -24,6 +24,9 @@ class Comments_Controller extends Controller {
   public function create($id) {
     $item = ORM::factory("item", $id);
     access::required("view", $item);
+    if (!comment::can_comment()) {
+      access::forbidden();
+    }
 
     $form = comment::get_add_form($item);
     try {
@@ -69,6 +72,9 @@ class Comments_Controller extends Controller {
   public function form_add($item_id) {
     $item = ORM::factory("item", $item_id);
     access::required("view", $item);
+    if (!comment::can_comment()) {
+      access::forbidden();
+    }
 
     print comment::prefill_add_form(comment::get_add_form($item));
   }

modules/comment/helpers/comment.php

@@ -60,5 +60,10 @@ class comment_Core {
     }
     return $form;
   }
+
+  static function can_comment() {
+    return !identity::active_user()->guest ||
+      module::get_var("comment", "access_permissions") == "everybody";
+  }
 }
 

modules/comment/helpers/comment_event.php

@@ -51,13 +51,11 @@ class comment_event_Core {
   }
 
   static function admin_menu($menu, $theme) {
-    /*
     $menu->get("settings_menu")
       ->append(Menu::factory("link")
                ->id("comment")
                ->label(t("Comments"))
                ->url(url::site("admin/comments")));
-    */
 
     $menu->get("content_menu")
       ->append(Menu::factory("link")

modules/comment/helpers/comment_installer.php

@@ -47,7 +47,8 @@ class comment_installer {
                DEFAULT CHARSET=utf8;");
 
     module::set_var("comment", "spam_caught", 0);
-    module::set_version("comment", 2);
+    module::set_var("comment", "access_permissions", "everybody");
+    module::set_version("comment", 3);
   }
 
   static function upgrade($version) {
@@ -56,6 +57,11 @@ class comment_installer {
       $db->query("ALTER TABLE {comments} CHANGE `state` `state` varchar(15) default 'unpublished'");
       module::set_version("comment", 2);
     }
+
+    if ($version == 2) {
+      module::set_var("comment", "access_permissions", "everybody");
+      module::set_version("comment", 3);
+    }
   }
 
   static function uninstall() {

modules/comment/module.info

@@ -1,3 +1,3 @@
 name = "Comments"
 description = "Allows users and guests to leave comments on photos and albums."
-version = 2
+version = 3

modules/comment/views/admin_comments.html.php

@@ -0,0 +1,7 @@
+<?php defined("SYSPATH") or die("No direct script access.") ?>
+<div class="g-block">
+  <h1> <?= t("Comment settings") ?> </h1>
+  <div class="g-block-content">
+    <?= $form ?>
+  </div>
+</div>

modules/comment/views/comments.html.php

@@ -1,9 +1,12 @@
 <?php defined("SYSPATH") or die("No direct script access.") ?>
-  <a href="<?= url::site("form/add/comments/{$item->id}") ?>#comment-form" id="g-add-comment"
+<? if (comment::can_comment()): ?>
+<a href="<?= url::site("form/add/comments/{$item->id}") ?>#comment-form" id="g-add-comment"
    class="g-button ui-corner-all ui-icon-left ui-state-default">
   <span class="ui-icon ui-icon-comment"></span>
   <?= t("Add a comment") ?>
 </a>
+<? endif ?>
+
 <div id="g-comment-detail">
   <? if (!$comments->count()): ?>
   <p class="g-no-comments">