function reset_keywords($new_kws_str, $type = 'equal')
{
$ks = $this->keywords();
$old_kws = array();
foreach ($ks as $k) {
$old_kws[] = $k->keyword;
}
$ps = explode(',', $new_kws_str);
$kws = array();
foreach ($ps as $p) {
$p = trim($p);
if (strlen($p)) {
$kws[$p] = $p;
}
}
$to_del = array_diff($old_kws, $kws);
foreach ($to_del as $k) {
Db::escape($k);
$sql = "delete from wx_reply_keywords where item_id='{$this->id}' and keyword='{$k}'";
Db::query($sql);
}
$to_add = array_diff($kws, $old_kws);
foreach ($to_add as $k) {
WxReplyKeyword::save(array('type' => $type, 'keyword' => $k, 'item_id' => $this->id));
}
$sql = "update " . WxReplyKeyword::table() . " set type='{$type}' where item_id='{$this->id}'";
Db::update($sql);
}
