✨ Add options.go

options.go

@@ -0,0 +1,52 @@
+package nomino
+
+import "strings"
+
+type generator func() string
+
+type config struct {
+	original  string
+	prefix    string
+	suffix    string
+	extension string
+	generator generator
+}
+
+func defaultConf() config {
+	return config{
+		extension: ".txt",
+		generator: func() string { return "abc" },
+	}
+}
+
+type Option func(c *config)
+
+func WithOriginal(o string) Option {
+	return func(c *config) {
+		c.original = "_" + o
+	}
+}
+
+func WithPrefix(p string) Option {
+	return func(c *config) {
+		c.prefix = p + "_"
+	}
+}
+
+func WithSuffix(s string) Option {
+	return func(c *config) {
+		c.suffix = "_" + s
+	}
+}
+
+func WithoutExtension() Option {
+	return func(c *config) {
+		c.extension = ""
+	}
+}
+
+func WithExtension(ext string) Option {
+	return func(c *config) {
+		c.extension = "." + strings.TrimPrefix(ext, ".")
+	}
+}