Split JID logic into xmpp/jid.go

1 files changed, 23 insertions, 0 deletions

diff --git a/xmpp/jid.go b/xmpp/jid.go
new file mode 100644
index 0000000..f3a5d49
--- /dev/null
+++ b/xmpp/jid.go
@@ -0,0 +1,23 @@
+package xmpp
+
+// domainpart extracts the domain name from a JID / XMPP address. See
+// https://datatracker.ietf.org/doc/html/rfc7622#section-3.2 for details.
+func domainpart(jid string) string {
+	list := []rune(jid)
+
+	for i, v := range list {
+		if v == '/' {
+			list = list[:i]
+			break
+		}
+	}
+
+	for i, v := range list {
+		if v == '@' {
+			list = list[i+1:]
+			break
+		}
+	}
+
+	return string(list)
+}