From 7305a725cb9e6aa0d1c0499c104224743d6debd3 Mon Sep 17 00:00:00 2001
From: Diogo Peralta Cordeiro <mail@diogo.site>
Date: Mon, 28 Mar 2022 20:56:25 +0100
Subject: [PATCH] [PLUGIN][UnboundGroup] First steps on implementing AP
 FEP-2100

---
 .../UnboundGroup/Controller/GroupSettings.php | 59 ++++++++++++++++++
 plugins/UnboundGroup/UnboundGroup.php         | 61 +++++++++++++++++++
 2 files changed, 120 insertions(+)
 create mode 100644 plugins/UnboundGroup/Controller/GroupSettings.php
 create mode 100644 plugins/UnboundGroup/UnboundGroup.php

diff --git a/plugins/UnboundGroup/Controller/GroupSettings.php b/plugins/UnboundGroup/Controller/GroupSettings.php
new file mode 100644
index 0000000000..7672a0537b
--- /dev/null
+++ b/plugins/UnboundGroup/Controller/GroupSettings.php
@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Plugin\UnboundGroup\Controller;
+
+use App\Core\Controller;
+use App\Core\Form;
+use function App\Core\I18n\_m;
+use App\Entity as E;
+use App\Util\Common;
+use App\Util\Exception\ClientException;
+use Component\Subscription\Subscription;
+use Plugin\ActivityPub\Util\Explorer;
+use Symfony\Component\Form\Extension\Core\Type\SubmitType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\HttpFoundation\Request;
+
+class GroupSettings extends Controller
+{
+    /**
+     * Manage the linksTo collection of a Group or Organisation Actor
+     */
+    public static function groupLinks(Request $request, E\Actor $target, string $details_id)
+    {
+        $actor = Common::ensureLoggedIn()->getActor();
+        if (!$actor->canModerate($target)) {
+            throw new ClientException(_m('You don\'t have enough permissions to edit {nickname}\'s settings', ['{nickname}' => $target->getNickname()]));
+        }
+
+        $form_definition = [
+            ['new_link', TextType::class, ['label' => _m('Link to'), 'required' => true, 'help' => _m('Enter the URI.')]],
+            [$add_link_to_form_name = 'save_group_links', SubmitType::class, ['label' => _m('Add link')]],
+        ];
+
+        $add_link_to_form = Form::create($form_definition);
+
+        if ($request->getMethod() === 'POST' && $request->request->has($add_link_to_form_name)) {
+            $add_link_to_form->handleRequest($request);
+            if ($add_link_to_form->isSubmitted() && $add_link_to_form->isValid()) {
+                if (Common::isValidHttpUrl($new_uri = $add_link_to_form->getData()['new_link'])) {
+                    $new_link = Explorer::getOneFromUri($new_uri);
+                    if (\is_null(Subscription::subscribe(subject: $target, object: $new_link, source: 'ActivityPub via FEP-2100'))) {
+                        throw new ClientException(_m('This group is already linked from {nickname}', ['{nickname}' => $new_link->getNickname()]));
+                    }
+                    Subscription::refreshSubscriptionCount($target, $new_link);
+                    Form::forceRedirect($add_link_to_form, $request);
+                } else {
+                    throw new ClientException(_m('Invalid URI given.'));
+                }
+            }
+        }
+
+        return [
+            '_template'          => 'self_tags_settings.fragment.html.twig',
+            'add_self_tags_form' => $add_link_to_form->createView(),
+        ];
+    }
+}
diff --git a/plugins/UnboundGroup/UnboundGroup.php b/plugins/UnboundGroup/UnboundGroup.php
new file mode 100644
index 0000000000..15c676f414
--- /dev/null
+++ b/plugins/UnboundGroup/UnboundGroup.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types = 1);
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * ActivityPub implementation for GNU social
+ *
+ * @package   GNUsocial
+ * @category  Actor
+ *
+ * @author    Diogo Peralta Cordeiro <@diogo.site>
+ * @copyright 2022 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace Plugin\UnboundGroup;
+
+use App\Core\Event;
+use App\Core\Modules\Plugin;
+use App\Entity\Actor;
+use Plugin\UnboundGroup\Controller\GroupSettings;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * When enabled, Adds ActivityPub "FEP-2100 Unbound Group and Organization" support to GNU social
+ *
+ * @copyright 2022 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+class UnboundGroup extends Plugin
+{
+    public function onPopulateSettingsTabs(Request $request, string $section, array &$tabs): bool
+    {
+        if ($section === 'profile' && $request->get('_route') === 'group_actor_settings') {
+            $tabs[] = [
+                'title'      => 'Linked',
+                'desc'       => 'Link to this Group from another Group.',
+                'id'         => 'settings-group-links-details',
+                'controller' => GroupSettings::groupLinks($request, Actor::getById((int) $request->get('id')), 'settings-group-links-details'),
+            ];
+        }
+        return Event::next;
+    }
+}