♻️ refactor: update codebase #2

Author: pnguyen215

README.md

@@ -101,17 +101,12 @@ import (
 
 func main() {
 	// time based on configuration
-	location, _ := time.LoadLocation("Asia/Ho_Chi_Minh")
-	conf := &timefy.Config{
-		WeekStartDay: time.Monday,
-		TimeLocation: location,
-		TimeFormats:  []string{"2006-01-02 15:04:05"},
-	}
-	t := time.Date(2025, 01, 15, 17, 51, 49, 123456789, time.Now().Location())
+	rule := timefy.NewRule().WithLocationRFC(timefy.DefaultTimezoneVietnam)
+	t = time.Date(2025, 01, 15, 17, 51, 49, 123456789, time.Now().Location())
 	fmt.Println(t)                              // 2025-01-15 17:51:49.123456789 +0700 +07
-	fmt.Println(conf.With(t).BeginningOfWeek()) // 2025-01-13 00:00:00 +0700 +07
-	v, _ := conf.Parse("2005-11-12 22:14:01")
-	fmt.Println(v) // 2005-11-12 22:14:01 +0700 +07
+	fmt.Println(rule.With(t).BeginningOfWeek()) // 2025-01-12 00:00:00 +0700 +07
+	v, _ := rule.Parse("2025-11-12 22:14:01")
+	fmt.Println(v) // 2025-11-12 22:14:01 +0700 +07
 }
 ```
 

time.go

@@ -744,6 +744,14 @@ func (t *Timex) FormatRFCshort(layout TimeRFC) string {
 	return t.Time.Format(string(layout))
 }
 
+// DefaultFormatRFC formats the time using a default layout that includes the date and time with nanosecond precision.
+//
+// Returns:
+//   - A string representing the formatted time in the default RFC format.
+func (t *Timex) DefaultFormatRFC() string {
+	return t.FormatRFC(TimeFormat20060102150405999999)
+}
+
 // parseWithFormat attempts to parse a given date/time string `s` using a series of predefined formats
 // specified in the `TimeFormats` slice of the Timex instance. It tries to parse the string in the provided
 // `location` and returns the parsed time value or an error if parsing fails.