MDL-62231 block_recent_activity: Implement null provider for the block

blocks/recent_activity/classes/privacy/provider.php

@@ -0,0 +1,47 @@
+<?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 block_recent_activity.
+ *
+ * @package    block_recent_activity
+ * @category   privacy
+ * @copyright  2018 Shamim Rezaie <[email protected]>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace block_recent_activity\privacy;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The block_recent_activity does not keep any data for more than COURSE_MAX_RECENT_PERIOD.
+ *
+ * @copyright  2018 Shamim Rezaie <[email protected]>
+ * @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';
+    }
+}

blocks/recent_activity/lang/en/block_recent_activity.php

@@ -24,6 +24,7 @@
  */
 
 $string['pluginname'] = 'Recent activity';
+$string['privacy:metadata'] = 'The recent activity block contains a cache of data stored elsewhere in Moodle.';
 $string['recent_activity:addinstance'] = 'Add a new recent activity block';
 $string['recent_activity:viewaddupdatemodule'] = 'View added and updated modules in recent activity block';
 $string['recent_activity:viewdeletemodule'] = 'View deleted modules in recent activity block';