use ergochat/irc-go instead of goshuirc/irc-go

vendor/github.com/ergochat/irc-go/ircutils/userhost.go

@@ -0,0 +1,56 @@
+// written by Daniel Oaks <daniel@danieloaks.net>
+// released under the ISC license
+
+package ircutils
+
+import "strings"
+
+// UserHost holds a username+host combination
+type UserHost struct {
+	Nick string
+	User string
+	Host string
+}
+
+// ParseUserhost takes a userhost string and returns a UserHost instance.
+func ParseUserhost(userhost string) UserHost {
+	var uh UserHost
+
+	if len(userhost) == 0 {
+		return uh
+	}
+
+	if strings.Contains(userhost, "!") {
+		usersplit := strings.SplitN(userhost, "!", 2)
+		var rest string
+		if len(usersplit) == 2 {
+			uh.Nick = usersplit[0]
+			rest = usersplit[1]
+		} else {
+			rest = usersplit[0]
+		}
+
+		hostsplit := strings.SplitN(rest, "@", 2)
+		if len(hostsplit) == 2 {
+			uh.User = hostsplit[0]
+			uh.Host = hostsplit[1]
+		} else {
+			uh.User = hostsplit[0]
+		}
+	} else {
+		hostsplit := strings.SplitN(userhost, "@", 2)
+		if len(hostsplit) == 2 {
+			uh.Nick = hostsplit[0]
+			uh.Host = hostsplit[1]
+		} else {
+			uh.User = hostsplit[0]
+		}
+	}
+
+	return uh
+}
+
+// // Canonical returns the canonical string representation of the userhost.
+// func (uh *UserHost) Canonical() string {
+// 	return ""
+// }