move requireLabnbookAuthentication() into local NS

classes/local/helper.php

+<?php
+
+/**
+ * @package     mod_labnbook
+ * @copyright   2019 Université Grenoble Alpes
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_labnbook\local;
+
+class helper
+{
+    /**
+     * Stop loading the current page if the current user has no LabnBook account.
+     * Redirects on an account binding|creation if necessary.
+     *
+     * @global \Stdclass $COURSE
+     * @return null
+     * @throws \moodle_exception
+     */
+    public static function requireLabnbookAuthentication() {
+        global $COURSE;
+        if (fetch\user::isAuthenticated()) {
+            return;
+        }
+        $institutionFetcher = new fetch\institution;
+        switch ($institutionFetcher->loginUser()) {
+            case fetch\institution::OK:
+               return;
+            case fetch\institution::ERROR_LOGIN_UNKNOWN:
+                redirect(
+                    "/mod/labnbook/user-binding.php?courseid={$COURSE->id}&return="
+                    . base64_encode($_SERVER['REQUEST_URI'])
+                );
+                break;
+            case fetch\institution::ERROR_TOKEN_NOTVALID:
+               throw new \moodle_exception("Internal error with LabNbook");
+            default:
+               throw new \moodle_exception("Unknown error with LabNbook");
+        }
+    }
+}

mod_form.php

@@ -8,15 +8,15 @@
  * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-use \mod_labnbook\fetch;
-use \mod_labnbook\form\select_dynamic;
+use mod_labnbook\fetch;
+use mod_labnbook\form\select_dynamic;
 
 defined('MOODLE_INTERNAL') || die();
 
 require_once($CFG->dirroot.'/course/moodleform_mod.php');
 
 // short-cut before loading the form, see `course/modedit.php`
-requireLabnbookAuthentication();
+\mod_labnbook\local\helper::requireLabnbookAuthentication();
 
 define('TEAMCONFIG_METHOD_STUDENTS', 1);
 define('TEAMCONFIG_METHOD_RANDOM', 3);
@@ -187,32 +187,3 @@ EOJS
         }
     }
 }
-
-/**
- * Stop loading the form if the current user has no LabnBook account.
- *
- * @global \Stdclass $COURSE
- * @return null
- * @throws \moodle_exception
- */
-function requireLabnbookAuthentication() {
-    global $COURSE;
-    if (fetch\user::isAuthenticated()) {
-        return;
-    }
-    $institutionFetcher = new fetch\institution;
-    switch ($institutionFetcher->loginUser()) {
-        case fetch\institution::OK:
-           return;
-        case fetch\institution::ERROR_LOGIN_UNKNOWN:
-            redirect(
-                "/mod/labnbook/user-binding.php?courseid={$COURSE->id}&return="
-                . base64_encode($_SERVER['REQUEST_URI'])
-            );
-            break;
-        case fetch\institution::ERROR_TOKEN_NOTVALID:
-           throw new \moodle_exception("Internal error with LabNbook");
-        default:
-           throw new \moodle_exception("Unknown error with LabNbook");
-    }
-}