Misc refactoring

irc/utils/message_tags.go

@@ -0,0 +1,27 @@
+// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
+package utils
+
+import "github.com/goshuirc/irc-go/ircmsg"
+
+// GetClientOnlyTags takes a tag map and returns a map containing just the client-only tags from it.
+func GetClientOnlyTags(tags map[string]ircmsg.TagValue) *map[string]ircmsg.TagValue {
+	if len(tags) < 1 {
+		return nil
+	}
+
+	clientOnlyTags := make(map[string]ircmsg.TagValue)
+
+	for name, value := range tags {
+		if len(name) > 1 && name[0] == '+' {
+			clientOnlyTags[name] = value
+		}
+	}
+
+	if len(clientOnlyTags) < 1 {
+		return nil
+	}
+
+	return &clientOnlyTags
+}