dispatch/irc/message.go

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package irc
import (
"strings"
)
type Message struct {
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Prefix string
Nick string
Command string
Params []string
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}
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func (m *Message) LastParam() string {
if len(m.Params) > 0 {
return m.Params[len(m.Params)-1]
}
return ""
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}
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func parseMessage(line string) *Message {
line = strings.Trim(line, "\r\n")
msg := Message{}
cmdStart := 0
cmdEnd := len(line)
if strings.HasPrefix(line, ":") {
cmdStart = strings.Index(line, " ") + 1
if cmdStart > 0 {
msg.Prefix = line[1 : cmdStart-1]
} else {
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return nil
}
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if i := strings.Index(msg.Prefix, "!"); i > 0 {
msg.Nick = msg.Prefix[:i]
} else if i := strings.Index(msg.Prefix, "@"); i > 0 {
msg.Nick = msg.Prefix[:i]
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} else {
msg.Nick = msg.Prefix
}
}
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var trailing string
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if i := strings.Index(line, " :"); i > 0 {
cmdEnd = i
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trailing = line[i+2:]
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}
cmd := strings.Split(line[cmdStart:cmdEnd], " ")
msg.Command = cmd[0]
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if msg.Command == "" {
return nil
}
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if len(cmd) > 1 {
msg.Params = cmd[1:]
}
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if cmdEnd != len(line) {
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msg.Params = append(msg.Params, trailing)
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}
return &msg
}