✨ Add time-based generators

generators.go

@@ -1,9 +1,13 @@
 package nomino
 
 import (
+	"time"
+
 	"github.com/google/uuid"
 )
 
+type generator func() (string, error)
+
 func setGenerator(c *config, g generator) {
 	c.generator = g
 }
@@ -21,3 +25,25 @@ func WithUUID() Option {
 		setGenerator(c, uuidGen)
 	}
 }
+
+const FileTimestamp string = "2006-01-02_03-05-06-0700"
+
+func WithTimestamp() Option {
+	return WithTimestampFormat(FileTimestamp)
+}
+
+func WithTimestampFormat(f string) Option {
+	return WithFormattedTime(time.Now(), f)
+}
+
+func WithTime(t time.Time) Option {
+	return WithFormattedTime(t, FileTimestamp)
+}
+
+func WithFormattedTime(t time.Time, f string) Option {
+	return func(c *config) {
+		setGenerator(c, func() (string, error) {
+			return t.Format(f), nil
+		})
+	}
+}