MDL-62079 core_filters: Implement null provider

filter/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_filters.
+ *
+ * @package    core_filters
+ * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core_filters\privacy;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Privacy Subsystem for core_filters 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:reason';
+    }
+}

lang/en/filters.php

@@ -72,6 +72,7 @@ $string['nofiltersenabled'] = 'No filter plugins have been enabled on this site.
 $string['off'] = 'Off';
 $string['offbutavailable'] = 'Off, but available';
 $string['on'] = 'On';
+$string['privacy:reason'] = 'The Filter subsystem does not store any personal data.';
 $string['profilefilterfield'] = 'Profile field name';
 $string['profilefilterlimiter'] = 'Profile field operator';
 $string['profilelabel'] = '{$a->label}: {$a->profile} {$a->operator} {$a->value}';