feat(group): add escalation hierarchy editor between groups

CHANGELOG.md

@@ -17,6 +17,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Add rector config
 - Implementation of the basic concept of escalation
 - Add the "Escalate to group" action to the ticket, change and problem business rules, and a page to switch the rules "Technician group" actions to it
+- Add the escalation hierarchy between groups: graph editor in the "Escalation" tab of the groups, with basic links (limited to their entity) and inherited links (replicated in the child entities). Changing it requires the right to update the GLPI configuration
+- Filter the groups of the "Escalate" form with the escalation tree
 
 ## [1.0.0-rc2]
 

ajax/group_link.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * -------------------------------------------------------------------------
+ * MoreOptions plugin for GLPI
+ * -------------------------------------------------------------------------
+ *
+ * MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * -------------------------------------------------------------------------
+ * @copyright Copyright (C) 2025 by the MoreOptions plugin team.
+ * @license   MIT https://opensource.org/licenses/mit-license.php
+ * @link      https://github.com/pluginsGLPI/moreoptions
+ * @link      https://gitlab.teclib.com/glpi-network/moreoptions/
+ * -------------------------------------------------------------------------
+ */
+
+use GlpiPlugin\Moreoptions\EscalationTree\TreeEditor;
+
+/**
+ * Applies a change made in the escalation graph of an entity, or saves it, then renders the editor
+ * again (see TreeEditor::respond()).
+ */
+
+Session::checkLoginUser();
+
+TreeEditor::respond($_POST)->display();