MDL-61966 block_myoverview: Update to provider for user preferences.

blocks/myoverview/classes/privacy/provider.php

@@ -27,20 +27,35 @@
 defined('MOODLE_INTERNAL') || die();
 
 /**
- * Privacy Subsystem for block_myoverview implementing null_provider.
+ * Privacy Subsystem for block_myoverview.
  *
  * @copyright  2018 Zig Tan <zig@moodle.com>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements \core_privacy\local\metadata\null_provider {
+class provider implements \core_privacy\local\metadata\provider, \core_privacy\local\request\user_preference_provider {
 
     /**
-     * Get the language string identifier with the component's language
-     * file to explain why this plugin stores no data.
+     * Returns meta-data information about the myoverview block.
      *
-     * @return  string
+     * @param  \core_privacy\local\metadata\collection $collection A collection of meta-data.
+     * @return \core_privacy\local\metadata\collection Return the collection of meta-data.
      */
-    public static function get_reason() : string {
-        return 'privacy:metadata';
+    public static function get_metadata(\core_privacy\local\metadata\collection $collection) :
+            \core_privacy\local\metadata\collection {
+        $collection->add_user_preference('block_myoverview_last_tab', 'privacy:metadata:overviewlasttab');
+        return $collection;
+    }
+
+    /**
+     * Export all user preferences for the myoverview block
+     *
+     * @param int $userid The userid of the user whose data is to be exported.
+     */
+    public static function export_user_preferences(int $userid) {
+        $preference = get_user_preferences('block_myoverview_last_tab', null, $userid);
+        if (isset($preference)) {
+            \core_privacy\local\request\writer::export_user_preference('block_myoverview', 'block_myoverview_last_tab',
+                    $preference, get_string('privacy:metadata:overviewlasttab', 'block_myoverview'));
+        }
     }
 }

blocks/myoverview/lang/en/block_myoverview.php

@@ -44,4 +44,4 @@
 $string['timeline'] = 'Timeline';
 $string['viewcourse'] = 'View course';
 $string['viewcoursename'] = 'View course {$a}';
-$string['privacy:metadata'] = 'The Course overview block only shows data stored in other locations.';
+$string['privacy:metadata:overviewlasttab'] = 'This stores the last tab selected by the user in the overview tab.';

blocks/myoverview/tests/privacy_test.php

@@ -0,0 +1,80 @@
+<?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/>.
+
+/**
+ * Unit tests for the block_myoverview implementation of the privacy API.
+ *
+ * @package    block_myoverview
+ * @category   test
+ * @copyright  2018 Adrian Greeve <adriangreeve.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+use \core_privacy\local\request\writer;
+use \block_myoverview\privacy\provider;
+
+/**
+ * Unit tests for the block_myoverview implementation of the privacy API.
+ *
+ * @copyright  2018 Adrian Greeve <adriangreeve.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class block_myoverview_privacy_testcase extends \core_privacy\tests\provider_testcase {
+
+    /**
+     * Ensure that export_user_preferences returns no data if the user has not visited the myoverview block.
+     */
+    public function test_export_user_preferences_no_pref() {
+        $this->resetAfterTest();
+
+        $user = $this->getDataGenerator()->create_user();
+        provider::export_user_preferences($user->id);
+        $writer = writer::with_context(\context_system::instance());
+        $this->assertFalse($writer->has_any_data());
+    }
+
+    /**
+     * Test that the preference courses is exported properly.
+     */
+    public function test_export_user_preferences_course_preference() {
+        $this->resetAfterTest();
+
+        $user = $this->getDataGenerator()->create_user();
+        set_user_preference('block_myoverview_last_tab', 'courses', $user);
+
+        provider::export_user_preferences($user->id);
+        $writer = writer::with_context(\context_system::instance());
+        $blockpreferences = $writer->get_user_preferences('block_myoverview');
+        $this->assertEquals('courses', $blockpreferences->block_myoverview_last_tab->value);
+    }
+
+    /**
+     * Test that the preference timeline is exported properly.
+     */
+    public function test_export_user_preferences_timeline_preference() {
+        $this->resetAfterTest();
+
+        $user = $this->getDataGenerator()->create_user();
+        set_user_preference('block_myoverview_last_tab', 'timeline', $user);
+
+        provider::export_user_preferences($user->id);
+        $writer = writer::with_context(\context_system::instance());
+        $blockpreferences = $writer->get_user_preferences('block_myoverview');
+        $this->assertEquals('timeline', $blockpreferences->block_myoverview_last_tab->value);
+    }
+}