MDL-83519 mod_assign: Add shortlink handler

Co-authored-by: Andrew Lyons <andrew@nicols.co.uk>

public/mod/assign/classes/shortlink_handler.php

@@ -0,0 +1,48 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle 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 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace mod_assign;
+
+use core\shortlink_handler_interface;
+
+/**
+ * Shortlink handler for mod_assign.
+ *
+ * @package    mod_assign
+ * @copyright  2025 Andrew Lyons <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class shortlink_handler implements shortlink_handler_interface {
+    #[\Override]
+    public function get_valid_linktypes(): array {
+        return [
+            'view',
+        ];
+    }
+
+    #[\Override]
+    public function process_shortlink(
+        string $type,
+        string $identifier,
+    ): ?\core\url {
+        return match ($type) {
+            'view' => new \core\url('/mod/assign/view.php', [
+                'id' => $identifier,
+            ]),
+            default => null,
+        };
+    }
+}