MDL-62326 core_antivirus: Implement null provider

lang/en/antivirus.php

@@ -27,4 +27,5 @@
 $string['antivirussettings'] = 'Manage antivirus plugins';
 $string['configantivirusplugins'] = 'Please choose the antivirus plugins you wish to use and arrange them in order of being applied.';
 $string['emailsubject'] = '{$a} :: Antivirus notification';
+$string['privacy:metadata'] = 'The Antivirus system does not store any personal data.';
 $string['virusfounduser'] = 'The file you have uploaded, {$a->filename}, has been scanned by a virus checker and found to be infected! Your file upload was NOT successful.';

lib/antivirus/classes/privacy/provider.php

@@ -0,0 +1,46 @@
+<?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/>.
+
+/**
+ * Privacy Subsystem implementation for core_antivirus.
+ *
+ * @package    core_antivirus
+ * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core_antivirus\privacy;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Privacy Subsystem for core_antivirus implementing null_provider.
+ *
+ * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class provider implements \core_privacy\local\metadata\null_provider {
+
+    /**
+     * Get the language string identifier with the component's language
+     * file to explain why this plugin stores no data.
+     *
+     * @return  string
+     */
+    public static function get_reason() : string {
+        return 'privacy:metadata';
+    }
+}