public function get_hashtags($post_id, $add_hashtags = true)
{
if (empty($add_hashtags)) {
// check for false or 0
return;
} elseif (is_numeric($add_hashtags)) {
$max_hashtags = $add_hashtags;
} elseif (!empty($this->p->options['og_desc_hashtags'])) {
$max_hashtags = $this->p->options['og_desc_hashtags'];
} else {
return;
}
$hashtags = apply_filters($this->p->cf['lca'] . '_hashtags_seed', '', $post_id, $add_hashtags);
if (!empty($hashtags)) {
if ($this->p->debug->enabled) {
$this->p->debug->log('hashtags seed = "' . $hashtags . '"');
}
} else {
$tags = array_slice($this->get_tags($post_id), 0, $max_hashtags);
if (!empty($tags)) {
// remove special character incompatible with Twitter
$hashtags = SucomUtil::array_to_hashtags($tags);
if ($this->p->debug->enabled) {
$this->p->debug->log('hashtags (max ' . $max_hashtags . ') = "' . $hashtags . '"');
}
}
}
return apply_filters($this->p->cf['lca'] . '_hashtags', $hashtags, $post_id, $add_hashtags);
}
