function fof_is_subscribed($user_id, $url)
{
return fof_db_is_subscribed($user_id, $url);
}
function fof_subscribe($user_id, $url, $unread = 'today')
{
fof_trace();
$url = trim($url);
if (empty($url)) {
return "<span style=\"color:red\">Error: <b>cannot subscribe to nothing</b> (empty url?)</span><br>\n";
}
/* ensure url at least has a reasonable protocol */
$url = fof_prepare_url($url);
$feed = fof_db_get_feed_by_url($url);
if (empty($feed)) {
/* raw url does not exist, try cooking it with simplepie */
if (($rss = fof_parse($url)) === false || $rss->error()) {
$rss_error = isset($rss) && $rss->error() ? $rss->error() : '';
return "<span style=\"color:red\">Error: <b>Failed to subscribe to '{$url}'</b>" . (!empty($rss_error) ? ": {$rss_error}</span> <span><a href=\"http://feedvalidator.org/check?url=" . urlencode($url) . "\">try to validate it?</a>" : "") . "</span><br>\n";
}
$self = $rss->get_link(0, 'self');
$url = html_entity_decode($self ? $self : $rss->subscribe_url(), ENT_QUOTES);
$feed = fof_db_get_feed_by_url($url);
if (empty($feed)) {
/* cooked url does not exist, add it */
$new_feed_id = fof_db_add_feed($url, $rss->get_title(), $rss->get_link(), $rss->get_description());
if (empty($new_feed_id)) {
return "<span style=\"color:red\">Error: <b>Failed to subscribe to '{$url}'</b></span<br>\n";
}
$feed = fof_db_get_feed_by_id($new_feed_id);
/* assert(!empty($feed)) */
}
}
if (fof_db_is_subscribed($user_id, $url)) {
return "<span>You are already subscribed to '" . fof_render_feed_link($feed) . "'.</span><br>\n";
}
/* subscribe to the feed */
fof_db_add_subscription($user_id, $feed['feed_id']);
/* update the feed */
list($n, $err) = fof_update_feed($new_feed_id);
if (!empty($err)) {
return "<span style=\"color:red\">{$err}</span><br>\n";
}
/* set requested existing items unread */
if ($unread != 'no') {
fof_db_mark_feed_unread($user_id, $feed['feed_id'], $unread);
}
/* set tags for user on any existing items */
fof_apply_plugin_tags($feed['feed_id'], NULL, $user_id);
return "<span style=\"color:green\"><b>Subscribed to '" . fof_render_feed_link($feed) . "'.</b></span><br>\n";
}