function mb_handler_topic_bookmark()
{
/* Is this a topic bookmark request? */
if (!mb_is_board_action('toggle_bookmark') || !isset($_GET['topic_id'])) {
return;
}
/* Make sure the user is logged in and bookmarks are active. */
if (!is_user_logged_in() || !mb_is_bookmarks_active()) {
return;
}
/* Get the topic ID. */
$topic_id = mb_get_topic_id($_GET['topic_id']);
/* Verify nonce. */
if (!isset($_GET['mb_nonce']) || !wp_verify_nonce($_GET['mb_nonce'], "bookmark_topic_{$topic_id}")) {
return;
}
/* Get the current user ID. */
$user_id = get_current_user_id();
/* If the current user can't read the topic, make sure they are not bookmarked and bail. */
if (!current_user_can('read_topic', $topic_id)) {
mb_remove_user_topic_bookmark($user_id, $topic_id);
return;
}
/* If the user is already bookmarked, unbookmark them. */
if (mb_is_topic_user_bookmark($user_id, $topic_id)) {
mb_remove_user_topic_bookmark($user_id, $topic_id);
/* Else, bookmark them. */
} else {
mb_add_user_topic_bookmark($user_id, $topic_id);
}
/* Redirect the user. */
wp_safe_redirect(esc_url(remove_query_arg(array('mb_action', 'topic_id', 'mb_nonce'))));
}
/**
* Returns the topic un/bookmark link.
*
* @since 1.0.0
* @access public
* @param int $topic_id
* @return string
*/
function mb_get_topic_bookmark_link($topic_id = 0)
{
if (!mb_is_bookmarks_active()) {
return '';
}
$topic_id = mb_get_topic_id($topic_id);
$link = '';
if (is_user_logged_in()) {
$user_id = get_current_user_id();
$url = mb_get_topic_bookmark_url($topic_id);
$text = mb_is_topic_user_bookmark($user_id, $topic_id) ? __('Unbookmark', 'message-board') : __('Bookmark', 'message-board');
if (!empty($url)) {
$link = sprintf('<a class="mb-bookmark-link" href="%s">%s</a>', $url, $text);
}
}
return apply_filters('mb_get_topic_bookmark_link', $link, $topic_id);
}