in case the action column is empty display a string

classes/local/table/interaction_attention_table.php

@@ -118,6 +118,9 @@ public function col_tools($row) {
         $step = step_manager::get_step_instance($row->stepinstanceid);
 
         $tools = interaction_manager::get_action_tools($step->subpluginname, $row->processid);
+        if (empty($tools)) {
+            return get_string('noactiontools', 'tool_lifecycle');
+        }
         foreach ($tools as $tool) {
             $output .= $this->format_icon_link($tool['action'], $row->processid, $step->id, $tool['alt']);
         }

classes/local/table/interaction_remaining_table.php

@@ -126,7 +126,9 @@ public function col_tools($row) {
         if ($row->processid !== null) {
             return '';
         }
-
+        if (empty($this->availabletools)) {
+            return get_string('noactiontools', 'tool_lifecycle');
+        }
         $actions = [];
         foreach ($this->availabletools as $tool) {
             if (has_capability($tool->capability, \context_course::instance($row->courseid), null, false)) {

lang/de/tool_lifecycle.php

@@ -111,6 +111,8 @@
 $string['manual_trigger_success'] = 'Workflow erfolgreich gestartet.';
 $string['move_down'] = 'Nach unten bewegen';
 $string['move_up'] = 'Nach oben bewegen';
+$string['name_until_date'] = '"{$a->name}" bis {$a->date}';
+$string['noactiontools'] = 'Keine Aktionen verfügbar';
 $string['nocoursestodisplay'] = 'Es gibt derzeit keine Kurse, die Ihre Aufmerksamkeit erfordern!';
 $string['nointeractioninterface'] = 'Keine Interaktionsschnittstelle verfügbar!';
 $string['noprocesserrors'] = 'Es gibt keine fehlerhaften Prozesse, die behandelt werden müssen!';

lang/en/tool_lifecycle.php

@@ -129,6 +129,7 @@
 $string['move_down'] = 'Move down';
 $string['move_up'] = 'Move up';
 $string['name_until_date'] = '"{$a->name}" until {$a->date}';
+$string['noactiontools'] = 'No tools available';
 $string['nocoursestodisplay'] = 'There are currently no courses which require your attention!';
 $string['nointeractioninterface'] = 'No interaction interface available!';
 $string['noprocesserrors'] = 'There are no process errors to handle!';