add timeformat cli arg parsing

gen/config.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/alehechka/json2go/jenshared"
 )
@@ -17,6 +18,7 @@ type Config struct {
 	RootName       string
 	PackageName    string
 	OutputFileName string
+	TimeFormat     string
 }
 
 func (c *Config) toJensharedConfig() *jenshared.Config {
@@ -34,6 +36,7 @@ func (c *Config) toJensharedConfig() *jenshared.Config {
 		PackageName:     c.PackageName,
 		OutputFileName:  c.OutputFileName,
 		OutputDirectory: dir,
+		TimeFormat:      c.getTimeFormat(),
 		Debugger:        c.Debugger,
 	}
 }
@@ -60,3 +63,47 @@ func (c *Config) prepareOutputFileName() {
 		c.OutputFileName += ".go"
 	}
 }
+
+func (c *Config) getTimeFormat() string {
+
+	if len(c.TimeFormat) == 0 {
+		return time.RFC3339
+	}
+
+	switch c.TimeFormat {
+	case "Layout":
+		return time.Layout
+	case "ANSIC":
+		return time.ANSIC
+	case "UnixDate":
+		return time.UnixDate
+	case "RubyDate":
+		return time.RubyDate
+	case "RFC822":
+		return time.RFC822
+	case "RFC822Z":
+		return time.RFC822Z
+	case "RFC850":
+		return time.RFC850
+	case "RFC1123":
+		return time.RFC1123
+	case "RFC1123Z":
+		return time.RFC1123Z
+	case "RFC3339":
+		return time.RFC3339
+	case "RFC3339Nano":
+		return time.RFC3339Nano
+	case "Kitchen":
+		return time.Kitchen
+	case "Stamp":
+		return time.Stamp
+	case "StampMilli":
+		return time.StampMilli
+	case "StampMicro":
+		return time.StampMicro
+	case "StampNano":
+		return time.StampNano
+	default:
+		return c.TimeFormat
+	}
+}