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MDL-63497 mod_chat: Add support for removal of context users

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This issue is part of the MDL-62560 Epic.
This commit is contained in:
Michael Hawkins 2018-09-10 18:00:59 +08:00 • committed by David Monllao
parent 19fc6012cf
commit 464b17b79b
2 changed files with 174 additions and 0 deletions
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52
mod/chat/classes/privacy/provider.php
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@ -33,9 +33,11 @@ use moodle_recordset;
use stdClass;
use core_privacy\local\metadata\collection;
use core_privacy\local\request\approved_contextlist;
use core_privacy\local\request\approved_userlist;
use core_privacy\local\request\contextlist;
use core_privacy\local\request\helper;
use core_privacy\local\request\transform;
use core_privacy\local\request\userlist;
use core_privacy\local\request\writer;
/**
@ -48,6 +50,7 @@ use core_privacy\local\request\writer;
*/
class provider implements
\core_privacy\local\metadata\provider,
\core_privacy\local\request\core_userlist_provider,
\core_privacy\local\request\plugin\provider {
/**
@ -123,6 +126,33 @@ class provider implements
return $contextlist;
}
/**
* Get the list of users who have data within a context.
*
* @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
*/
public static function get_users_in_context(userlist $userlist) {
$context = $userlist->get_context();
if (!is_a($context, \context_module::class)) {
return;
}
$params = [
'instanceid' => $context->instanceid,
'modulename' => 'chat',
];
$sql = "SELECT chm.userid
FROM {course_modules} cm
JOIN {modules} m ON m.id = cm.module AND m.name = :modulename
JOIN {chat} c ON c.id = cm.instance
JOIN {chat_messages} chm ON chm.chatid = c.id
WHERE cm.id = :instanceid";
$userlist->add_from_sql('userid', $sql, $params);
}
/**
* Export all user data for the specified user, in the specified contexts.
*
@ -225,6 +255,28 @@ class provider implements
$DB->delete_records_select('chat_users', $sql, $params);
}
/**
* Delete multiple users within a single context.
*
* @param approved_userlist $userlist The approved context and user information to delete information for.
*/
public static function delete_data_for_users(approved_userlist $userlist) {
global $DB;
$context = $userlist->get_context();
$cm = $DB->get_record('course_modules', ['id' => $context->instanceid]);
$chat = $DB->get_record('chat', ['id' => $cm->instance]);
list($userinsql, $userinparams) = $DB->get_in_or_equal($userlist->get_userids(), SQL_PARAMS_NAMED);
$params = array_merge(['chatid' => $chat->id], $userinparams);
$sql = "chatid = :chatid AND userid {$userinsql}";
$DB->delete_records_select('chat_messages', $sql, $params);
$DB->delete_records_select('chat_messages_current', $sql, $params);
$DB->delete_records_select('chat_users', $sql, $params);
}
/**
* Return a dict of chat IDs mapped to their course module ID.
*