Split utils out to a separate subpackage

irc/utils/args.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
+package utils
+
+// ArgsToStrings takes the arguments and splits them into a series of strings,
+// each argument separated by delim and each string bounded by maxLength.
+func ArgsToStrings(maxLength int, arguments []string, delim string) []string {
+	var messages []string
+
+	var buffer string
+	for {
+		if len(arguments) < 1 {
+			break
+		}
+
+		if len(buffer) > 0 && maxLength < len(buffer)+len(delim)+len(arguments[0]) {
+			messages = append(messages, buffer)
+			buffer = ""
+			continue
+		}
+
+		if len(buffer) > 1 {
+			buffer += delim
+		}
+		buffer += arguments[0]
+		arguments = arguments[1:]
+	}
+
+	if len(buffer) > 0 {
+		messages = append(messages, buffer)
+	}
+
+	return messages
+}