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main.go
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
/*
TODO:
- Del of main window should move to other window.
- Editing main window should update status on \n or something like that.
- Make use of full names from roster
*/
import (
"bytes"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"regexp"
"strings"
"time"
"code.google.com/p/goplan9/plan9/acme"
"code.google.com/p/rsc/google"
"code.google.com/p/rsc/xmpp"
)
var acmeDebug = flag.Bool("acmedebug", false, "print acme debugging")
type Window struct {
*acme.Win // acme window
*acme.Event // most recent event received
err error // error reading event
typ string // kind of window "main", "chat"
name string // acme window title
remote string // for typ=="chat", remote address
dirty bool // window is dirty
blinky bool // window's dirty box is blinking
lastTime time.Time
}
type Msg struct {
w *Window // window where message belongs
*xmpp.Chat // recently received chat
err error // error reading chat message
}
var (
client *xmpp.Client // current xmpp client (can reconnect)
acct google.Account // google acct info
statusCache = make(map[string][]*xmpp.Presence)
active = make(map[string]*Window) // active windows
acmeChan = make(chan *Window) // acme events
msgChan = make(chan *Msg) // chat events
mainWin *Window
status = xmpp.Available
statusMsg = ""
lastActivity time.Time
)
const (
awayTime = 10 * time.Minute
extendedAwayTime = 30 * time.Minute
)
func usage() {
fmt.Fprintf(os.Stderr, "usage: Chat [-a acct] name...\n")
flag.PrintDefaults()
os.Exit(2)
}
var acctName = flag.String("a", "", "account to use")
func main() {
flag.Usage = usage
flag.Parse()
acct = google.Acct(*acctName)
aw, err := acme.New()
if err != nil {
log.Fatal(err)
}
aw.Name("Chat/" + acct.Nick + "/")
client, err = xmpp.NewClient("talk.google.com:443", acct.Email, acct.Password)
if err != nil {
log.Fatal(err)
}
w := &Window{Win: aw, typ: "main", name: "Chat/" + acct.Nick + "/"}
data, err := ioutil.ReadFile(google.Dir() + "/chat." + acct.Nick)
if err != nil {
log.Fatal(err)
}
if err == nil {
w.Write("body", data)
}
mainWin = w
active[w.name] = w
go w.readAcme()
client.Roster()
setStatus(status)
go w.readChat()
lastActivity = time.Now()
tick := time.Tick(0.5e9)
Loop:
for len(active) > 0 {
select {
case w := <-acmeChan:
if w == nil {
// Sync with reader.
continue
}
if w.err != nil {
if active[w.name] == nil {
continue
}
log.Fatal(w.err)
}
if *acmeDebug {
fmt.Fprintf(os.Stderr, "%s %c%c %d,%d %q\n", w.name, w.C1, w.C2, w.Q0, w.Q1, w.Text)
}
if w.C1 == 'M' || w.C1 == 'K' {
lastActivity = time.Now()
if status != xmpp.Available {
setStatus(xmpp.Available)
}
}
if (w.C2 == 'x' || w.C2 == 'X') && string(w.Text) == "Del" {
// TODO: Hangup connection for w.typ == "acct"?
delete(active, w.name)
w.Del(true)
continue Loop
}
switch w.typ {
case "main":
switch w.C2 {
case 'L': // Button 3 in body: load chat window for contact.
w.expand()
fallthrough
case 'l': // Button 3 in tag
arg := string(w.Text)
showContact(arg)
continue Loop
}
case "chat":
if w.C1 == 'F' && w.C2 == 'I' {
continue Loop
}
if w.C1 != 'M' && w.C1 != 'K' {
break
}
if w.blinky {
w.blinky = false
w.Fprintf("ctl", "dirty\n")
}
switch w.C2 {
case 'X', 'x':
if string(w.Text) == "Ack" {
w.Fprintf("ctl", "clean\n")
}
case 'I':
w.sendMsg()
continue Loop
}
}
w.WriteEvent(w.Event)
case msg := <-msgChan:
w := msg.w
if msg.err != nil {
w.Fprintf("body", "ERROR: %s\n", msg.err)
continue Loop
}
you := msg.Remote
if i := strings.Index(you, "/"); i >= 0 {
you = you[:i]
}
switch msg.Type {
case "chat":
w := showContact(you)
text := strings.TrimSpace(msg.Text)
if text == "" {
// Probably a composing notification.
continue
}
w.message("> %s\n", text)
w.blinky = true
w.dirty = true
case "presence":
pr := msg.Presence
pr, new := savePresence(pr, you)
if !new {
continue
}
w := lookContact(you)
if w != nil {
w.status(pr)
}
mainStatus(pr, you)
}
case t := <-tick:
switch status {
case xmpp.Available:
if t.Sub(lastActivity) > awayTime {
setStatus(xmpp.Away)
}
case xmpp.Away:
if t.Sub(lastActivity) > extendedAwayTime {
setStatus(xmpp.ExtendedAway)
}
}
for _, w := range active {
if w.blinky {
w.dirty = !w.dirty
if w.dirty {
w.Fprintf("ctl", "dirty\n")
} else {
w.Fprintf("ctl", "clean\n")
}
}
}
}
}
}
func setStatus(st xmpp.Status) {
status = st
client.Status(status, statusMsg)
mainWin.statusTag(status, statusMsg)
}
func savePresence(pr *xmpp.Presence, you string) (pr1 *xmpp.Presence, new bool) {
old := cachedPresence(you)
pr.StatusMsg = strings.TrimSpace(pr.StatusMsg)
c := statusCache[you]
for i, p := range c {
if p.Remote == pr.Remote {
c[i] = pr
c[0], c[i] = c[i], c[0]
goto Best
}
}
c = append(c, pr)
c[0], c[len(c)-1] = c[len(c)-1], c[0]
statusCache[you] = c
Best:
best := cachedPresence(you)
return best, old == nil || old.Status != best.Status || old.StatusMsg != best.StatusMsg
}
func cachedPresence(you string) *xmpp.Presence {
c := statusCache[you]
if len(c) == 0 {
return nil
}
best := c[0]
for _, p := range c {
if p.Status > best.Status {
best = p
}
}
return best
}
func short(st xmpp.Status) string {
switch st {
case xmpp.Unavailable:
return "?"
case xmpp.ExtendedAway:
return "x"
case xmpp.Away:
return "-"
case xmpp.Available:
return "+"
case xmpp.DoNotDisturb:
return "!"
}
return st.String()
}
func long(st xmpp.Status) string {
switch st {
case xmpp.Unavailable:
return "unavailable"
case xmpp.ExtendedAway:
return "offline"
case xmpp.Away:
return "away"
case xmpp.Available:
return "available"
case xmpp.DoNotDisturb:
return "busy"
}
return st.String()
}
func (w *Window) time() string {
/*
Auto-date chat windows:
Show date and time on first message.
Show time if minute is different from last message.
Show date if day is different from last message.
Oct 10 12:01 > hi
12:03 hello there
12:05 > what's up?
12:10 [Away]
*/
now := time.Now()
m1, d1, y1 := w.lastTime.Date()
m2, d2, y2 := now.Date()
w.lastTime = now
if m1 != m2 || d1 != d2 || y1 != y2 {
return now.Format("Jan 2 15:04 ")
}
return now.Format("15:04 ")
}
func (w *Window) status(pr *xmpp.Presence) {
msg := ""
if pr.StatusMsg != "" {
msg = ": " + pr.StatusMsg
}
w.message("[%s%s]\n", long(pr.Status), msg)
w.statusTag(pr.Status, pr.StatusMsg)
}
func (w *Window) statusTag(status xmpp.Status, statusMsg string) {
data, err := w.ReadAll("tag")
if err != nil {
log.Printf("read tag: %v", err)
return
}
//log.Printf("tag1: %s\n", data)
i := bytes.IndexByte(data, '|')
if i >= 0 {
data = data[i+1:]
} else {
data = nil
}
//log.Printf("tag2: %s\n", data)
j := bytes.IndexByte(data, '|')
if j >= 0 {
data = data[j+1:]
}
//log.Printf("tag3: %s\n", data)
msg := ""
if statusMsg != "" {
msg = " " + statusMsg
}
w.Ctl("cleartag\n")
w.Write("tag", []byte(" "+short(status)+msg+" |"+string(data)))
}
func mainStatus(pr *xmpp.Presence, you string) {
w := mainWin
if err := w.Addr("#0/^(.[ \t]+)?" + regexp.QuoteMeta(you) + "([ \t]*|$)/"); err != nil {
return
}
q0, q1, err := w.ReadAddr()
if err != nil {
log.Printf("ReadAddr: %s\n", err)
return
}
if err := w.Addr("#%d/"+regexp.QuoteMeta(you)+"/", q0); err != nil {
log.Printf("Addr2: %s\n", err)
}
q2, q3, err := w.ReadAddr()
if err != nil {
log.Printf("ReadAddr2: %s\n", err)
return
}
space := " "
if q1 > q3 || pr.StatusMsg == "" { // already have or don't need space
space = ""
}
if err := w.Addr("#%d/.*/", q1); err != nil {
log.Printf("Addr3: %s\n", err)
}
w.Fprintf("data", "%s%s", space, pr.StatusMsg)
space = ""
if q0 == q2 {
w.Addr("#%d,#%d", q0, q0)
space = " "
} else {
w.Addr("#%d,#%d", q0, q0+1)
}
w.Fprintf("data", "%s%s", short(pr.Status), space)
}
func (w *Window) expand() {
// Use selection if any.
w.Fprintf("ctl", "addr=dot\n")
q0, q1, err := w.ReadAddr()
if err == nil && q0 <= w.Q0 && w.Q0 <= q1 {
goto Read
}
if err = w.Addr("#%d-/[a-zA-Z0-9_@.\\-]*/,#%d+/[a-zA-Z0-9_@.\\-]*/", w.Q0, w.Q1); err != nil {
log.Printf("expand: %v", err)
return
}
q0, q1, err = w.ReadAddr()
if err != nil {
log.Printf("expand: %v", err)
return
}
Read:
data, err := w.ReadAll("xdata")
if err != nil {
log.Printf("read: %v", err)
return
}
w.Text = data
w.Q0 = q0
w.Q1 = q1
return
}
// Invariant: in chat windows, the acme addr corresponds to the
// empty string just before the input being typed. Text before addr
// is the chat history (usually ending in a blank line).
func (w *Window) message(format string, args ...interface{}) {
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("message; addr=%d,%d", q0, q1)
}
if err := w.Addr(".-/\\n?\\n?/"); err != nil && *acmeDebug {
log.Printf("set addr: %s", err)
}
q0, _, _ := w.ReadAddr()
nl := ""
if q0 > 0 {
nl = "\n"
}
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("inserting; addr=%d,%d", q0, q1)
}
w.Fprintf("data", nl+w.time()+format+"\n", args...)
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("wrote; addr=%d,%d", q0, q1)
}
}
func (w *Window) sendMsg() {
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("sendMsg; addr=%d,%d", q0, q1)
}
if err := w.Addr(`.,./(.|\n)*\n/`); err != nil {
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("no text (%s); addr=%d,%d", err, q0, q1)
}
return
}
q0, q1, _ := w.ReadAddr()
if *acmeDebug {
log.Printf("found msg; addr=%d,%d", q0, q1)
}
line, _ := w.ReadAll("xdata")
trim := string(bytes.TrimSpace(line))
if len(trim) > 0 {
err := client.Send(xmpp.Chat{Remote: w.remote, Type: "chat", Text: trim})
// Select blank line before input (if any) and input.
w.Addr("#%d-/\\n?\\n?/,#%d", q0, q1)
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("selected text; addr=%d,%d", q0, q1)
}
q0, _, _ := w.ReadAddr()
// Overwrite with \nmsg\n\n.
// Leaves addr after final \n, which is where we want it.
nl := ""
if q0 > 0 {
nl = "\n"
}
errstr := ""
if err != nil {
errstr = fmt.Sprintf("\n%s", errstr)
}
w.Fprintf("data", "%s%s%s%s\n\n", nl, w.time(), trim, errstr)
if *acmeDebug {
q0, q1, _ := w.ReadAddr()
log.Printf("wrote; addr=%d,%d", q0, q1)
}
w.Fprintf("ctl", "clean\n")
}
}
func (w *Window) readAcme() {
for {
e, err := w.ReadEvent()
if err != nil {
w.err = err
acmeChan <- w
break
}
//fmt.Printf("%c%c %d,%d %d,%d %#x %#q %#q %#q\n", e.C1, e.C2, e.Q0, e.Q1, e.OrigQ0, e.OrigQ1, e.Flag, e.Text, e.Arg, e.Loc)
w.Event = e
acmeChan <- w
acmeChan <- nil
}
}
func (w *Window) readChat() {
for {
msg, err := client.Recv()
if err != nil {
msgChan <- &Msg{w: w, err: err}
break
}
//fmt.Printf("%s\n", *msg)
msgChan <- &Msg{w: w, Chat: &msg}
}
}
func lookContact(you string) *Window {
return active["Chat/"+acct.Nick+"/"+you]
}
func showContact(you string) *Window {
w := lookContact(you)
if w != nil {
w.Ctl("show\n")
return w
}
ww, err := acme.New()
if err != nil {
log.Fatal(err)
}
name := "Chat/" + acct.Nick + "/" + you
ww.Name(name)
w = &Window{Win: ww, typ: "chat", name: name, remote: you}
w.Fprintf("body", "\n")
w.Addr("#1")
w.OpenEvent()
w.Fprintf("ctl", "cleartag\n")
w.Fprintf("tag", " Ack")
if p := cachedPresence(you); p != nil {
w.status(p)
}
active[name] = w
go w.readAcme()
return w
}
func randid() string {
return fmt.Sprint(time.Now())
}