func (s *Server) sendContacts(c *Client) {
var msg database.Message
msg.Cmd = &database.Command{Name: "send-contacts", Args: database.GetContacts(s.db, c.id)}
c.Write(&msg)
}
func (s *Server) sendPastMessages(c *Client, contact string) {
var msg database.Message
msg.Cmd = &database.Command{Name: "send-messages", Args: database.GetMessages(s.db, c.id, contact)}
c.Write(&msg)
}