Add a version of iopred's Message() and Target() Line methods, and tests.

client/line.go

@@ -25,6 +25,44 @@ func (l *Line) Copy() *Line {
 	return &nl
 }
 
+// Return the contents of the text portion of a line.  This only really
+// makes sense for lines with a :text part, but there are a lot of them.
+func (line *Line) Text() string {
+	if len(line.Args) > 0 {
+		return line.Args[len(line.Args)-1]
+	}
+	return ""
+}
+
+// Return the target of the line, usually the first Arg for the IRC verb.
+// If the line was broadcast from a channel, the target will be that channel.
+// If the line was broadcast by a user, the target will be that user.
+// NOTE: Makes the assumption that all channels start with #.
+// TODO(fluffle): Add 005 CHANTYPES parsing for this?
+func (line *Line) Target() string {
+	switch line.Cmd {
+	case PRIVMSG, NOTICE, ACTION:
+		if !strings.HasPrefix(line.Args[0], "#") {
+			return line.Nick
+		}
+	case CTCP, CTCPREPLY:
+		// CTCP prepends the CTCP verb to line.Args, thus for the message
+		//   :nick!user@host PRIVMSG #foo :\001BAR baz\001
+		// line.Args contains: []string{"BAR", "#foo", "baz"}
+		// TODO(fluffle): Arguably this is broken, and we should have
+		// line.Args containing: []string{"#foo", "BAR", "baz"}
+		// ... OR change conn.Ctcp()'s argument order to be consistent.
+		if !strings.HasPrefix(line.Args[1], "#") {
+			return line.Nick
+		}
+		return line.Args[1]
+	}
+	if len(line.Args) > 0 {
+		return line.Args[0]
+	}
+	return ""
+}
+
 // parseLine() creates a Line from an incoming message from the IRC server.
 func parseLine(s string) *Line {
 	line := &Line{Raw: s}