// Add adds an asset to a set. The set must belong to the current user, and
// the asset must be addable to sets.
//
// This function requires the client to be logged in.
func Add(client *rbxweb.Client, assetId int64, setId int32) (err error) {
query := url.Values{
"rqtype": {"addtoset"},
"assetId": {client.I64toa(assetId)},
"setId": {client.I32toa(setId)},
}
resp, err := client.Post(client.GetURL(`www`, `/Sets/SetHandler.ashx`, query), "", nil)
if err = client.AssertResp(resp, err); err != nil {
return err
}
resp.Body.Close()
return nil
}