// ParseModeLine parses a line of mode changes into core.DataChange structs.
// Redundant changes are compressed down into one.
// An error is returned if unknown modes are encountered, or modes are dropped
// due to missing parameters. The remainder of the modes are still parsed.
// e is the user or channel being changed.
func (p *ModeParser) ParseModeLine(source *core.User, e core.Extensible, modeline []byte, params []string) ([]core.DataChange, os.Error) {
var adding bool = true
var unknown string
var missing string
var param int
modes := string(modeline)
changes := make(map[string]core.DataChange)
for _, char := range modes {
if char == '+' {
adding = true
continue
} else if char == '-' {
adding = false
continue
}
if v, ok := p.simple[char]; ok {
if v, ok := p.extended[char]; ok {
newchanges := v(adding, e, "")
for _, it := range newchanges {
changes[it.Name] = it
}
continue
}
var change core.DataChange
change.Name = v
if adding {
change.Data = "on"
}
changes[change.Name] = change
continue
}
if v, ok := p.parametered[char]; ok {
var change core.DataChange
if adding {
if param >= len(params) {
missing += string(char)
continue
}
if v, ok := p.extended[char]; ok {
newch := v(adding, e, params[param])
param++
for _, it := range newch {
changes[it.Name] = it
}
continue
}
change.Name = v
change.Data = params[param]
param++
} else {
if v, ok := p.extended[char]; ok {
newchanges := v(adding, e, "")
for _, it := range newchanges {
changes[it.Name] = it
}
continue
}
change.Name = v
}
changes[change.Name] = change
continue
}
if v, ok := p.list[char]; ok {
if param >= len(params) {
missing += string(char)
continue
}
var change core.DataChange
cparam := params[param]
param++
if v, ok := p.extended[char]; ok {
newchanges := v(adding, e, cparam)
for _, it := range newchanges {
if it.Data != "" {
it.Data += fmt.Sprintf(" setby-%s setat-%d", source.GetSetBy(), time.Seconds())
}
changes[it.Name] = it
}
continue
}
if adding {
change.Name = v + " " + cparam
change.Data = fmt.Sprintf("on setby-%s setat-%d", source.GetSetBy(), time.Seconds())
} else {
change.Name = v + " " + cparam
}
changes[change.Name] = change
continue
}
if v, ok := p.membership[char]; ok {
var ch *core.Channel
var ok bool
if ch, ok = e.(*core.Channel); !ok {
continue
}
if param >= len(params) {
missing += string(char)
continue
}
par := params[param]
param++
if v, ok := p.extended[char]; ok {
newchanges := v(adding, e, par)
for _, it := range newchanges {
if it.Member != nil {
changes["m"+it.Member.User().ID()+" "+it.Name] = it
} else {
changes[it.Name] = it
}
}
continue
}
var u *core.User
var m *core.Membership
if u = core.GetUser(par); u == nil {
if u = core.GetUserByNick(par); u == nil {
continue
}
}
if m = ch.GetMember(u); m == nil {
continue
}
var change core.DataChange
change.Name = v
change.Member = m
if adding {
change.Data = "on"
}
changes["m"+change.Member.User().ID()+" "+change.Name] = change
continue
}
unknown += string(char)
}
// Turn the modes into a slice.
c := make([]core.DataChange, 0, len(changes))
for _, change := range changes {
c = append(c, change)
}
// Get the error, if we had one.
var errstring string
if unknown != "" {
errstring += "Unknown mode letters: " + unknown
if missing != "" {
errstring += " "
}
}
if missing != "" {
errstring += "Missing parameters for: " + missing
}
var err os.Error
if errstring != "" {
err = os.NewError(errstring)
}
return c, err
}
// Handle a single (potential) server link.
// outgoing indicates whether it is outgoing or incoming.
func link(c *net.TCPConn, outgoing bool) {
errMsg := "Input Error"
serverMutex.Lock()
// Create a new server, and add it to the server list.
l := new(local)
l.local = l
l.next = servers
if servers != nil {
servers.prev = &(l.server)
}
servers = &(l.server)
l.c = c
serverMutex.Unlock()
// Defer deletion of the server. If it's already deleted, no harm done.
defer func() {
l.Delete(errMsg)
}()
if outgoing {
link_auth(l)
}
errMsg = irc.ReadLine(l.c, make([]byte, 20960), func(line []byte) {
// Parse the line.
prefix, command, params, perr := irc.Parse(commands, line, l.authed)
// Look up the server or user this command is from.
var source interface{}
if len(prefix) == 9 {
u := core.GetUser(string(prefix))
if u == nil {
source = nil
} else if u.Owner() != me {
source = nil
} else {
userver := u.Owndata().(*server)
if userver.local == l {
source = u
}
}
} else if len(prefix) == 3 {
v := core.GetSID(string(prefix))
if v == nil {
source = nil
} else if s, ok := v.(*server); ok {
if s.local == l {
source = s
}
}
} else if len(prefix) == 0 {
// No prefix; it's from this server.
source = &(l.server)
} else {
// Prefix is gibberish.
source = nil
}
// If we successfully got a command and source, run it.
if source != nil && command != nil {
command.Handler(source, params)
} else if perr != nil {
// The IRC protocol is stupid.
switch perr.Num {
case irc.CmdNotFound:
irc.SendLine(l, from(nil), l.sid, "421", "%s :%s",
perr.CmdName, perr)
case irc.CmdForRegistered:
irc.SendFrom(l, from(nil), "451 %s :%s", perr.CmdName,
perr)
case irc.CmdForUnregistered:
irc.SendFrom(l, from(nil), "462 %s :%s", l.sid, perr)
default:
irc.SendFrom(l, from(nil), "461 %s %s :%s", l.sid,
perr.CmdName, perr)
}
}
})
}
