MDL-62005 block_comments: Add implementation of Privacy API

blocks/comments/classes/privacy/provider.php

@@ -0,0 +1,115 @@
+<?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_comments.
+ *
+ * @package    block_comments
+ * @category   privacy
+ * @copyright  2018 Shamim Rezaie <shamim@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace block_comments\privacy;
+
+defined('MOODLE_INTERNAL') || die();
+
+use core_privacy\local\metadata\collection;
+use core_privacy\local\request\approved_contextlist;
+use core_privacy\local\request\contextlist;
+
+/**
+ * Privacy Subsystem implementation for block_comments.
+ *
+ * @copyright  2018 Shamim Rezaie <shamim@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class provider implements
+        // The block_comments block stores user provided data.
+        \core_privacy\local\metadata\provider,
+
+        // The block_comments block provides data directly to core.
+        \core_privacy\local\request\plugin\provider {
+
+    /**
+     * Returns meta data about this system.
+     *
+     * @param collection $collection
+     * @return $this|collection
+     */
+    public static function get_metadata(collection $collection) {
+        return $collection->add_subsystem_link('core_comment', [], 'privacy:metadata:core_comment');
+    }
+
+    /**
+     * Get the list of contexts that contain user information for the specified user.
+     *
+     * @param int $userid
+     * @return contextlist
+     */
+    public static function get_contexts_for_userid($userid) {
+        $contextlist = new contextlist();
+
+        $sql = "SELECT contextid
+                  FROM {comments}
+                 WHERE component = :component
+                   AND userid = :userid";
+        $params = [
+            'component' => 'block_comments',
+            'userid' => $userid
+        ];
+
+        $contextlist->add_from_sql($sql, $params);
+
+        return $contextlist;
+    }
+
+    /**
+     * Export all user data for the specified user, in the specified contexts.
+     *
+     * @param approved_contextlist $contextlist
+     */
+    public static function export_user_data(approved_contextlist $contextlist) {
+        $contexts = $contextlist->get_contexts();
+        foreach ($contexts as $context) {
+            \core_comment\privacy\provider::export_comments(
+                    $context,
+                    'block_comments',
+                    'page_comments',
+                    0,
+                    []
+            );
+        }
+    }
+
+    /**
+     * Delete all data for all users in the specified context.
+     *
+     * @param \context $context
+     */
+    public static function delete_data_for_all_users_in_context(\context $context) {
+        \core_comment\privacy\provider::delete_comments_for_all_users($context, 'block_comments');
+    }
+
+    /**
+     * Delete all user data for the specified user, in the specified contexts.
+     *
+     * @param approved_contextlist $contextlist
+     */
+    public static function delete_data_for_user(approved_contextlist $contextlist) {
+        \core_comment\privacy\provider::delete_comments_for_user($contextlist, 'block_comments');
+    }
+}

blocks/comments/lang/en/block_comments.php

@@ -26,3 +26,4 @@
 $string['comments:myaddinstance'] = 'Add a new comments block to Dashboard';
 $string['comments:addinstance'] = 'Add a new comments block';
 $string['pluginname'] = 'Comments';
+$string['privacy:metadata:core_comment'] = 'A record of comments added.';