package xmpp

import (
	"encoding/base64"
	"encoding/xml"
	"log"
)

func (s *session) sasl() {
	tokens := make([]xml.Token, 0, 3)

	start := xml.StartElement{
		xml.Name{"urn:ietf:params:xml:ns:xmpp-sasl", "auth"},
		[]xml.Attr{
			xml.Attr{xml.Name{"", "mechanism"}, "PLAIN"},
		},
	}
	tokens = append(tokens, start)

	data := []byte("\x00" + username(s.jid) + "\x00" + s.pwd)
	dst := make([]byte, base64.StdEncoding.EncodedLen(len(data)))
	base64.StdEncoding.Encode(dst, data)
	payload := xml.CharData(dst)
	tokens = append(tokens, payload)

	end := start.End()
	tokens = append(tokens, end)

	for _, t := range tokens {
		err := s.ed.encodeToken(t)
		if err != nil {
			log.Println("Could not encode stream end!")
			return
		}
	}
}