soju/bridge.go

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package soju
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import (
"gopkg.in/irc.v3"
"strings"
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)
func forwardChannel(dc *downstreamConn, ch *upstreamChannel) {
if !ch.complete {
panic("Tried to forward a partial channel")
}
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sendTopic(dc, ch)
// TODO: rpl_topicwhotime
sendNames(dc, ch)
}
func sendTopic(dc *downstreamConn, ch *upstreamChannel) {
downstreamName := dc.marshalEntity(ch.conn.network, ch.Name)
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if ch.Topic != "" {
dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
Command: irc.RPL_TOPIC,
Params: []string{dc.nick, downstreamName, ch.Topic},
})
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} else {
dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
Command: irc.RPL_NOTOPIC,
Params: []string{dc.nick, downstreamName, "No topic is set"},
})
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}
}
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func sendNames(dc *downstreamConn, ch *upstreamChannel) {
downstreamName := dc.marshalEntity(ch.conn.network, ch.Name)
emptyNameReply := &irc.Message{
Prefix: dc.srv.prefix(),
Command: irc.RPL_NAMREPLY,
Params: []string{dc.nick, string(ch.Status), downstreamName, ""},
}
maxLength := maxMessageLength - len(emptyNameReply.String())
var buf strings.Builder
for nick, memberships := range ch.Members {
s := memberships.Format(dc) + dc.marshalEntity(ch.conn.network, nick)
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if buf.Len() != 0 && maxLength < buf.Len()+1+len(s) {
// There's not enough space for the next space + nick.
dc.SendMessage(&irc.Message{
Prefix: dc.srv.prefix(),
Command: irc.RPL_NAMREPLY,
Params: []string{dc.nick, string(ch.Status), downstreamName, buf.String()},
})
buf.Reset()
}
if buf.Len() != 0 {
buf.WriteByte(' ')
}
buf.WriteString(s)
}
if buf.Len() != 0 {
dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
Command: irc.RPL_NAMREPLY,
Params: []string{dc.nick, string(ch.Status), downstreamName, buf.String()},
})
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}
dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
Command: irc.RPL_ENDOFNAMES,
Params: []string{dc.nick, downstreamName, "End of /NAMES list"},
})
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}