Add test to avoid warnings when missing interface (#149)

CHANGELOG.md

@@ -9,6 +9,7 @@ __This version is not compatible with versions of Moodle prior to Moodle 4.4!__
 
 ### Fixed
 - Channels 12 and 13 for wireless AP can be selected (issue #143).
+- Avoid warnings when not Ethernet interface on device (issue #148).
 
 ## Version 2.18.1, 2024-10-13
 

classes/local/utils.php

@@ -185,8 +185,11 @@ public static function get_ethernet_interface_name() {
             $iter = new \RecursiveIteratorIterator($iter, \RecursiveIteratorIterator::CHILD_FIRST);
             $iter = new \RegexIterator($iter, '|^.*/device$|i', \RecursiveRegexIterator::GET_MATCH);
             $iter->setMaxDepth(2);
-            $matches = array_values(preg_grep('#^.*/(eth|en).*$#i', array_keys(iterator_to_array($iter))))[0];
-            return explode('/', $matches)[4];
+            if ( $matches = array_values(preg_grep('#^.*/(eth|en).*$#i', array_keys(iterator_to_array($iter)))) ) {
+                return explode('/', $matches[0])[4];
+            } else {
+                return false;
+            }
         } else {
             return false;
         }

version.php

@@ -26,8 +26,8 @@
 
 $plugin = new stdClass();
 
-$plugin->version  = 2024102700;
-$plugin->release = '2.18.2-beta';
+$plugin->version  = 2024102800;
+$plugin->release = '2.18.2-beta2';
 $plugin->requires = 2024042200;
 $plugin->supported = [404, 405];
 $plugin->maturity = MATURITY_BETA;