MDL-75211 mod_data: show batch select only if delcheck is present

mod/data/classes/output/view_footer.php

@@ -115,7 +115,7 @@ class view_footer extends sticky_footer {
             $this->baseurl
         );
 
-        if ($parser->get_template_name() != 'singletemplate' && $canmanageentries) {
+        if ($parser->get_template_name() != 'singletemplate' && $parser->has_tag('delcheck') && $canmanageentries) {
             // Build the select/deselect all control.
             $selectallid = 'selectall-listview-entries';
             $togglegroup = 'listview-entries';

mod/data/classes/template.php

@@ -215,6 +215,16 @@ class template {
         $this->tags = $matches['tags'];
     }
 
+    /**
+     * Check if a tag is present in the template.
+     *
+     * @param bool $tagname the tag to check (without ##)
+     * @return bool if the tag is present
+     */
+    public function has_tag(string $tagname): bool {
+        return in_array($tagname, $this->tags);
+    }
+
     /**
      * Return the current template name.
      *