Basic IRCv3 message parser

1 files changed, 46 insertions, 0 deletions

diff --git a/source.go b/source.go
new file mode 100644
index 0000000..8fc9848
--- /dev/null
+++ b/source.go
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+
+package irc
+
+import "bytes"
+
+type Source interface {
+	AsSourceString() string
+}
+
+func parseSource(s []byte) Source {
+	nick, userhost, found := bytes.Cut(s, []byte{'!'})
+	if !found {
+		return Server{name: bytesToString(s)}
+	}
+
+	user, host, found := bytes.Cut(userhost, []byte{'@'})
+	if !found {
+		return Server{name: bytesToString(s)}
+	}
+
+	return Client{
+		Nick: bytesToString(nick),
+		User: bytesToString(user),
+		Host: bytesToString(host),
+	}
+}
+
+type Server struct {
+	name string
+}
+
+func (s Server) AsSourceString() string {
+	return s.name
+}
+
+type Client struct {
+	Nick string
+	User string
+	Host string
+}
+
+func (c Client) AsSourceString() string {
+	return c.Nick + "!" + c.User + "@" + c.Host
+}