function mb_handler_topic_subscribe()
{
/* Is this a topic subscription request? */
if (!mb_is_board_action('toggle_subscribe') || !isset($_GET['topic_id'])) {
return;
}
/* Make sure the user is logged in and subscriptions are active. */
if (!is_user_logged_in() || !mb_is_subscriptions_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'], "subscribe_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 subscribed and bail. */
if (!current_user_can('read_topic', $topic_id)) {
mb_remove_user_topic_subscription($user_id, $topic_id);
return;
}
/* If the user is already subscribed, unsubscribe them. */
if (mb_is_user_subscribed_topic($user_id, $topic_id)) {
mb_remove_user_topic_subscription($user_id, $topic_id);
/* Else, subscribe them. */
} else {
mb_add_user_topic_subscription($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/subscribe link.
*
* @since 1.0.0
* @access public
* @param int $topic_id
* @return string
*/
function mb_get_topic_subscribe_link($topic_id = 0)
{
if (!mb_is_subscriptions_active()) {
return '';
}
$topic_id = mb_get_topic_id($topic_id);
$link = '';
if (is_user_logged_in()) {
$user_id = get_current_user_id();
$url = mb_get_topic_subscribe_url($topic_id);
$text = mb_is_user_subscribed_topic($user_id, $topic_id) ? __('Unsubscribe', 'message-board') : __('Subscribe', 'message-board');
if (!empty($url)) {
$link = sprintf('<a class="mb-subscribe-link" href="%s">%s</a>', $url, $text);
}
}
return apply_filters('mb_get_topic_subscribe_link', $link, $topic_id);
}
?>
</label>
<?php
mb_topic_editor();
?>
</div><!-- .mb-form-content -->
<p class="mb-form-submit">
<input type="submit" value="<?php
esc_attr_e('Create Topic', 'message-board');
?>
" />
</p><!-- .mb-form-submit -->
<?php
if (mb_is_subscriptions_active()) {
// Only show subscribe if subscriptions enabled.
?>
<p class="mb-form-subscribe">
<label>
<input type="checkbox" name="mb_topic_subscribe" value="1" />
<?php
mb_topic_label('mb_form_subscribe');
?>
</label>
</p><!-- .mb-form-subscribe -->
<?php
}
// End check if subscriptions enabled.
?>
</label>
<?php
mb_reply_editor();
?>
</div><!-- .mb-form-content -->
<p>
<input type="submit" value="<?php
esc_attr_e('Post Reply', 'message-board');
?>
" />
</p>
<?php
if (mb_is_subscriptions_active() && !mb_is_user_subscribed_topic(mb_get_topic_id())) {
?>
<p>
<label>
<input type="checkbox" name="mb_reply_subscribe" value="1" />
<?php
_e('Notify me of follow-up posts via email', 'message-board');
?>
</label>
</p>
<?php
}
// End check if subscriptions enabled.
?>
