diff --git a/admin/tool/log/store/database/classes/privacy/provider.php b/admin/tool/log/store/database/classes/privacy/provider.php
new file mode 100644
index 00000000000..b5e8eacf1b0
--- /dev/null
+++ b/admin/tool/log/store/database/classes/privacy/provider.php
@@ -0,0 +1,114 @@
+<?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/>.
+
+/**
+ * Data provider.
+ *
+ * @package    logstore_database
+ * @copyright  2018 Frédéric Massart
+ * @author     Frédéric Massart <fred@branchup.tech>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace logstore_database\privacy;
+defined('MOODLE_INTERNAL') || die();
+
+use context;
+use core_privacy\local\metadata\collection;
+use core_privacy\local\request\contextlist;
+
+/**
+ * Data provider class.
+ *
+ * @package    logstore_database
+ * @copyright  2018 Frédéric Massart
+ * @author     Frédéric Massart <fred@branchup.tech>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class provider implements
+    \core_privacy\local\metadata\provider,
+    \tool_log\local\privacy\logstore_provider {
+
+    use \tool_log\local\privacy\moodle_database_export_and_delete;
+
+    /**
+     * Returns metadata.
+     *
+     * @param collection $collection The initialised collection to add items to.
+     * @return collection A listing of user data stored through this system.
+     */
+    public static function get_metadata(collection $collection) : collection {
+        $collection->add_external_location_link('log', [
+            'eventname' => 'privacy:metadata:log:eventname',
+            'userid' => 'privacy:metadata:log:userid',
+            'relateduserid' => 'privacy:metadata:log:relateduserid',
+            'anonymous' => 'privacy:metadata:log:anonymous',
+            'other' => 'privacy:metadata:log:other',
+            'timecreated' => 'privacy:metadata:log:timecreated',
+            'origin' => 'privacy:metadata:log:origin',
+            'ip' => 'privacy:metadata:log:ip',
+            'realuserid' => 'privacy:metadata:log:realuserid',
+        ], 'privacy:metadata:log');
+        return $collection;
+    }
+
+    /**
+     * Add contexts that contain user information for the specified user.
+     *
+     * @param contextlist $contextlist The contextlist to add the contexts to.
+     * @param int $userid The user to find the contexts for.
+     * @return void
+     */
+    public static function add_contexts_for_userid(contextlist $contextlist, $userid) {
+        list($db, $table) = static::get_database_and_table();
+        if (!$db || !$table) {
+            return;
+        }
+
+        $sql = 'userid = :userid1 OR relateduserid = :userid2 OR realuserid = :userid3';
+        $params = ['userid1' => $userid, 'userid2' => $userid, 'userid3' => $userid];
+        $contextids = $db->get_fieldset_select($table, 'DISTINCT contextid', $sql, $params);
+        if (empty($contextids)) {
+            return;
+        }
+
+        $sql = implode(' UNION ', array_map(function($id) use ($db) {
+            return 'SELECT ' . $id . $db->sql_null_from_clause();
+        }, $contextids));
+        $contextlist->add_from_sql($sql, []);
+    }
+
+    /**
+     * Get the database object.
+     *
+     * @return array Containing moodle_database, string, or null values.
+     */
+    protected static function get_database_and_table() {
+        $manager = get_log_manager();
+        $store = new \logstore_database\log\store($manager);
+        $db = $store->get_extdb();
+        return $db ? [$db, $store->get_config_value('dbtable')] : [null, null];
+    }
+
+    /**
+     * Get the path to export the logs to.
+     *
+     * @return array
+     */
+    protected static function get_export_subcontext() {
+        return [get_string('privacy:path:logs', 'tool_log'), get_string('pluginname', 'logstore_database')];
+    }
+}
diff --git a/admin/tool/log/store/database/lang/en/logstore_database.php b/admin/tool/log/store/database/lang/en/logstore_database.php
index 0873229bf63..8f49696063d 100644
--- a/admin/tool/log/store/database/lang/en/logstore_database.php
+++ b/admin/tool/log/store/database/lang/en/logstore_database.php
@@ -44,6 +44,16 @@ $string['other'] = 'Other';
 $string['participating'] = 'Participating';
 $string['pluginname'] = 'External database log';
 $string['pluginname_desc'] = 'A log plugin that stores log entries in an external database table.';
+$string['privacy:metadata:log'] = 'A collection of past events';
+$string['privacy:metadata:log:anonymous'] = 'Whether the event was flagged as anonymous';
+$string['privacy:metadata:log:eventname'] = 'The event name';
+$string['privacy:metadata:log:ip'] = 'The IP address used at the time of the event';
+$string['privacy:metadata:log:origin'] = 'The origin of the event';
+$string['privacy:metadata:log:other'] = 'Additional information about the event';
+$string['privacy:metadata:log:realuserid'] = 'The ID of the real user behind the event, when masquerading a user.';
+$string['privacy:metadata:log:relateduserid'] = 'The ID of a user related to this event';
+$string['privacy:metadata:log:timecreated'] = 'The time at which the event occurred';
+$string['privacy:metadata:log:userid'] = 'The ID of the user who triggered this event';
 $string['read'] = 'Read';
 $string['tablenotfound'] = 'Specified table was not found';
 $string['teaching'] = 'Teaching';
diff --git a/admin/tool/log/store/database/tests/privacy_test.php b/admin/tool/log/store/database/tests/privacy_test.php
new file mode 100644
index 00000000000..4a1e37ec52d
--- /dev/null
+++ b/admin/tool/log/store/database/tests/privacy_test.php
@@ -0,0 +1,416 @@
+<?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/>.
+
+/**
+ * Data provider tests.
+ *
+ * @package    logstore_database
+ * @category   test
+ * @copyright  2018 Frédéric Massart
+ * @author     Frédéric Massart <fred@branchup.tech>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+global $CFG;
+
+use core_privacy\tests\provider_testcase;
+use core_privacy\local\request\contextlist;
+use core_privacy\local\request\approved_contextlist;
+use core_privacy\local\request\transform;
+use core_privacy\local\request\writer;
+use logstore_database\privacy\provider;
+
+require_once(__DIR__ . '/fixtures/event.php');
+
+/**
+ * Data provider testcase class.
+ *
+ * This testcase is almost identical to the logstore_standard testcase, aside from the
+ * initialisation of the relevant logstore obviously.
+ *
+ * @package    logstore_database
+ * @category   test
+ * @copyright  2018 Frédéric Massart
+ * @author     Frédéric Massart <fred@branchup.tech>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class logstore_database_privacy_testcase extends provider_testcase {
+
+    public function setUp() {
+        global $CFG;
+        $this->resetAfterTest();
+        $this->preventResetByRollback(); // Logging waits till the transaction gets committed.
+
+        // Fake the settings, we will abuse the standard plugin table here...
+        set_config('dbdriver', $CFG->dblibrary . '/' . $CFG->dbtype, 'logstore_database');
+        set_config('dbhost', $CFG->dbhost, 'logstore_database');
+        set_config('dbuser', $CFG->dbuser, 'logstore_database');
+        set_config('dbpass', $CFG->dbpass, 'logstore_database');
+        set_config('dbname', $CFG->dbname, 'logstore_database');
+        set_config('dbtable', $CFG->prefix . 'logstore_standard_log', 'logstore_database');
+        if (!empty($CFG->dboptions['dbpersist'])) {
+            set_config('dbpersist', 1, 'logstore_database');
+        } else {
+            set_config('dbpersist', 0, 'logstore_database');
+        }
+        if (!empty($CFG->dboptions['dbsocket'])) {
+            set_config('dbsocket', $CFG->dboptions['dbsocket'], 'logstore_database');
+        } else {
+            set_config('dbsocket', '', 'logstore_database');
+        }
+        if (!empty($CFG->dboptions['dbport'])) {
+            set_config('dbport', $CFG->dboptions['dbport'], 'logstore_database');
+        } else {
+            set_config('dbport', '', 'logstore_database');
+        }
+        if (!empty($CFG->dboptions['dbschema'])) {
+            set_config('dbschema', $CFG->dboptions['dbschema'], 'logstore_database');
+        } else {
+            set_config('dbschema', '', 'logstore_database');
+        }
+        if (!empty($CFG->dboptions['dbcollation'])) {
+            set_config('dbcollation', $CFG->dboptions['dbcollation'], 'logstore_database');
+        } else {
+            set_config('dbcollation', '', 'logstore_database');
+        }
+        if (!empty($CFG->dboptions['dbhandlesoptions'])) {
+            set_config('dbhandlesoptions', $CFG->dboptions['dbhandlesoptions'], 'logstore_database');
+        } else {
+            set_config('dbhandlesoptions', false, 'logstore_database');
+        }
+    }
+
+    public function test_get_contexts_for_userid() {
+        $admin = \core_user::get_user(2);
+        $u1 = $this->getDataGenerator()->create_user();
+        $u2 = $this->getDataGenerator()->create_user();
+        $u3 = $this->getDataGenerator()->create_user();
+
+        $c1 = $this->getDataGenerator()->create_course();
+        $cm1 = $this->getDataGenerator()->create_module('url', ['course' => $c1]);
+        $c2 = $this->getDataGenerator()->create_course();
+        $cm2 = $this->getDataGenerator()->create_module('url', ['course' => $c2]);
+
+        $sysctx = context_system::instance();
+        $c1ctx = context_course::instance($c1->id);
+        $c2ctx = context_course::instance($c2->id);
+        $cm1ctx = context_module::instance($cm1->cmid);
+        $cm2ctx = context_module::instance($cm2->cmid);
+
+        $this->enable_logging();
+        $manager = get_log_manager(true);
+
+        // User 1 is the author.
+        $this->setUser($u1);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u1), []);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $cm1ctx]);
+        $e->trigger();
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u1), [$cm1ctx]);
+
+        // User 2 is the related user.
+        $this->setUser(0);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u2), []);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $cm2ctx, 'relateduserid' => $u2->id]);
+        $e->trigger();
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u2), [$cm2ctx]);
+
+        // Admin user is the real user.
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($admin), []);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u3), []);
+        $this->setAdminUser();
+        \core\session\manager::loginas($u3->id, $sysctx);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($admin), [$sysctx, $c1ctx]);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u3), [$sysctx, $c1ctx]);
+
+        // By admin user masquerading u1 related to u3.
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u1), [$cm1ctx]);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u3), [$sysctx, $c1ctx]);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($admin), [$sysctx, $c1ctx]);
+        $this->setAdminUser();
+        \core\session\manager::loginas($u1->id, context_system::instance());
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx, 'relateduserid' => $u3->id]);
+        $e->trigger();
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u1), [$sysctx, $cm1ctx, $c2ctx]);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($u3), [$sysctx, $c1ctx, $c2ctx]);
+        $this->assert_contextlist_equals($this->get_contextlist_for_user($admin), [$sysctx, $c1ctx, $c2ctx]);
+    }
+
+    public function test_delete_data_for_user() {
+        global $DB;
+        $u1 = $this->getDataGenerator()->create_user();
+        $u2 = $this->getDataGenerator()->create_user();
+        $c1 = $this->getDataGenerator()->create_course();
+        $c2 = $this->getDataGenerator()->create_course();
+        $sysctx = context_system::instance();
+        $c1ctx = context_course::instance($c1->id);
+        $c2ctx = context_course::instance($c2->id);
+
+        $this->enable_logging();
+        $manager = get_log_manager(true);
+
+        // User 1 is the author.
+        $this->setUser($u1);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx]);
+        $e->trigger();
+
+        // User 2 is the author.
+        $this->setUser($u2);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx]);
+        $e->trigger();
+
+        // Confirm data present.
+        $this->assertTrue($DB->record_exists('logstore_standard_log', ['userid' => $u1->id, 'contextid' => $c1ctx->id]));
+        $this->assertEquals(3, $DB->count_records('logstore_standard_log', ['userid' => $u1->id]));
+        $this->assertEquals(2, $DB->count_records('logstore_standard_log', ['userid' => $u2->id]));
+
+        // Delete all the things!
+        provider::delete_data_for_user(new approved_contextlist($u1, 'logstore_database', [$c1ctx->id]));
+        $this->assertFalse($DB->record_exists('logstore_standard_log', ['userid' => $u1->id, 'contextid' => $c1ctx->id]));
+        $this->assertEquals(1, $DB->count_records('logstore_standard_log', ['userid' => $u1->id]));
+        $this->assertEquals(2, $DB->count_records('logstore_standard_log', ['userid' => $u2->id]));
+    }
+
+    public function test_delete_data_for_all_users_in_context() {
+        global $DB;
+        $u1 = $this->getDataGenerator()->create_user();
+        $u2 = $this->getDataGenerator()->create_user();
+        $c1 = $this->getDataGenerator()->create_course();
+        $c2 = $this->getDataGenerator()->create_course();
+        $sysctx = context_system::instance();
+        $c1ctx = context_course::instance($c1->id);
+        $c2ctx = context_course::instance($c2->id);
+
+        $this->enable_logging();
+        $manager = get_log_manager(true);
+
+        // User 1 is the author.
+        $this->setUser($u1);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx]);
+        $e->trigger();
+
+        // User 2 is the author.
+        $this->setUser($u2);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx]);
+        $e->trigger();
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx]);
+        $e->trigger();
+
+        // Confirm data present.
+        $this->assertTrue($DB->record_exists('logstore_standard_log', ['contextid' => $c1ctx->id]));
+        $this->assertEquals(3, $DB->count_records('logstore_standard_log', ['userid' => $u1->id]));
+        $this->assertEquals(2, $DB->count_records('logstore_standard_log', ['userid' => $u2->id]));
+
+        // Delete all the things!
+        provider::delete_data_for_all_users_in_context($c1ctx);
+        $this->assertFalse($DB->record_exists('logstore_standard_log', ['contextid' => $c1ctx->id]));
+        $this->assertEquals(1, $DB->count_records('logstore_standard_log', ['userid' => $u1->id]));
+        $this->assertEquals(1, $DB->count_records('logstore_standard_log', ['userid' => $u2->id]));
+    }
+
+    public function test_export_data_for_user() {
+        $admin = \core_user::get_user(2);
+        $u1 = $this->getDataGenerator()->create_user();
+        $u2 = $this->getDataGenerator()->create_user();
+        $u3 = $this->getDataGenerator()->create_user();
+        $u4 = $this->getDataGenerator()->create_user();
+        $c1 = $this->getDataGenerator()->create_course();
+        $cm1 = $this->getDataGenerator()->create_module('url', ['course' => $c1]);
+        $c2 = $this->getDataGenerator()->create_course();
+        $cm2 = $this->getDataGenerator()->create_module('url', ['course' => $c2]);
+        $sysctx = context_system::instance();
+        $c1ctx = context_course::instance($c1->id);
+        $c2ctx = context_course::instance($c2->id);
+        $cm1ctx = context_module::instance($cm1->cmid);
+        $cm2ctx = context_module::instance($cm2->cmid);
+
+        $path = [get_string('privacy:path:logs', 'tool_log'), get_string('pluginname', 'logstore_database')];
+        $this->enable_logging();
+        $manager = get_log_manager(true);
+
+        // User 1 is the author.
+        $this->setUser($u1);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx, 'other' => ['i' => 0]]);
+        $e->trigger();
+
+        // User 2 is related.
+        $this->setUser(0);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx, 'relateduserid' => $u2->id,
+            'other' => ['i' => 1]]);
+        $e->trigger();
+
+        // Admin user masquerades u3, which is related to u4.
+        $this->setAdminUser();
+        \core\session\manager::loginas($u3->id, $sysctx);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c1ctx, 'relateduserid' => $u4->id,
+            'other' => ['i' => 2]]);
+        $e->trigger();
+
+        // Confirm data present for u1.
+        provider::export_user_data(new approved_contextlist($u1, 'logstore_database', [$c2ctx->id, $c1ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertEmpty($data);
+        $data = writer::with_context($c1ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_you']);
+        $this->assertSame(0, $data->logs[0]['other']['i']);
+
+        // Confirm data present for u2.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u2, 'logstore_database', [$c2ctx->id, $c1ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertEmpty($data);
+        $data = writer::with_context($c1ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(false), $data->logs[0]['author_of_the_action_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['related_user_was_you']);
+        $this->assertSame(1, $data->logs[0]['other']['i']);
+
+        // Confirm data present for u3.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u3, 'logstore_database', [$c2ctx->id, $c1ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertEmpty($data);
+        $data = writer::with_context($c1ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_you']);
+        $this->assertEquals(transform::yesno(false), $data->logs[0]['related_user_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_masqueraded']);
+        $this->assertEquals(transform::yesno(false), $data->logs[0]['masquerading_user_was_you']);
+        $this->assertSame(2, $data->logs[0]['other']['i']);
+
+        // Confirm data present for u4.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u4, 'logstore_database', [$c2ctx->id, $c1ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertEmpty($data);
+        $data = writer::with_context($c1ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(false), $data->logs[0]['author_of_the_action_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['related_user_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_masqueraded']);
+        $this->assertEquals(transform::yesno(false), $data->logs[0]['masquerading_user_was_you']);
+        $this->assertSame(2, $data->logs[0]['other']['i']);
+
+        // Add anonymous events.
+        $this->setUser($u1);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx, 'relateduserid' => $u2->id,
+            'anonymous' => true]);
+        $e->trigger();
+        $this->setAdminUser();
+        \core\session\manager::loginas($u3->id, $sysctx);
+        $e = \logstore_database\event\unittest_executed::create(['context' => $c2ctx, 'relateduserid' => $u4->id,
+            'anonymous' => true]);
+        $e->trigger();
+
+        // Confirm data present for u1.
+        provider::export_user_data(new approved_contextlist($u1, 'logstore_database', [$c2ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['action_was_done_anonymously']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_you']);
+
+        // Confirm data present for u2.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u2, 'logstore_database', [$c2ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['action_was_done_anonymously']);
+        $this->assertArrayNotHasKey('author_of_the_action_was_you', $data->logs[0]);
+        $this->assertArrayNotHasKey('authorid', $data->logs[0]);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['related_user_was_you']);
+
+        // Confirm data present for u3.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u3, 'logstore_database', [$c2ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['action_was_done_anonymously']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_masqueraded']);
+        $this->assertArrayNotHasKey('masquerading_user_was_you', $data->logs[0]);
+        $this->assertArrayNotHasKey('masqueradinguserid', $data->logs[0]);
+
+        // Confirm data present for u4.
+        writer::reset();
+        provider::export_user_data(new approved_contextlist($u4, 'logstore_database', [$c2ctx->id]));
+        $data = writer::with_context($c2ctx)->get_data($path);
+        $this->assertCount(1, $data->logs);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['action_was_done_anonymously']);
+        $this->assertArrayNotHasKey('author_of_the_action_was_you', $data->logs[0]);
+        $this->assertArrayNotHasKey('authorid', $data->logs[0]);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['related_user_was_you']);
+        $this->assertEquals(transform::yesno(true), $data->logs[0]['author_of_the_action_was_masqueraded']);
+        $this->assertArrayNotHasKey('masquerading_user_was_you', $data->logs[0]);
+        $this->assertArrayNotHasKey('masqueradinguserid', $data->logs[0]);
+    }
+
+    /**
+     * Assert the content of a context list.
+     *
+     * @param contextlist $contextlist The collection.
+     * @param array $expected List of expected contexts or IDs.
+     * @return void
+     */
+    protected function assert_contextlist_equals($contextlist, array $expected) {
+        $expectedids = array_map(function($context) {
+            if (is_object($context)) {
+                return $context->id;
+            }
+            return $context;
+        }, $expected);
+        $contextids = array_map('intval', $contextlist->get_contextids());
+        sort($contextids);
+        sort($expectedids);
+        $this->assertEquals($expectedids, $contextids);
+    }
+
+    /**
+     * Enable logging.
+     *
+     * @return void
+     */
+    protected function enable_logging() {
+        set_config('enabled_stores', 'logstore_database', 'tool_log');
+        set_config('buffersize', 0, 'logstore_database');
+        set_config('logguests', 1, 'logstore_database');
+        get_log_manager(true);
+    }
+
+    /**
+     * Get the contextlist for a user.
+     *
+     * @param object $user The user.
+     * @return contextlist
+     */
+    protected function get_contextlist_for_user($user) {
+        $contextlist = new contextlist();
+        provider::add_contexts_for_userid($contextlist, $user->id);
+        return $contextlist;
+    }
+}