Stricter datetime input

configuration.go

@@ -6,9 +6,11 @@ import (
 
 	// Standard
 	"database/sql"
+	"time"
 )
 
 type Configuration struct {
+	timezoneLocation *time.Location
 	Settings map[string]string
 }
 
@@ -36,6 +38,7 @@ func SmonConfigInit() (cfg Configuration, err error) {
 		cfg.Settings[setting] = value
 	}
 
+	err = cfg.LoadTimezone()
 	return
 }
 
@@ -49,6 +52,15 @@ func (cfg *Configuration) Validate() (err error) {
 	return
 }
 
+func (cfg *Configuration) LoadTimezone() (err error) {
+	cfg.timezoneLocation, err = time.LoadLocation(cfg.Settings["TIMEZONE"])
+	return
+}
+
+func (cfg *Configuration) Timezone() *time.Location {
+	return cfg.timezoneLocation
+}
+
 func (cfg *Configuration) SetTheme(theme string) (err error) {
 	cfg.Settings["THEME"] = theme
 	_, err = service.Db.Conn.Exec(`UPDATE public.configuration SET value=$1 WHERE setting='THEME'`, theme)
@@ -57,6 +69,15 @@ func (cfg *Configuration) SetTheme(theme string) (err error) {
 
 func (cfg *Configuration) SetTimezone(tz string) (err error) {
 	cfg.Settings["TIMEZONE"] = tz
+	err = cfg.LoadTimezone()
+	if err != nil {
+		return werr.Wrap(err).WithData(tz)
+	}
+
 	_, err = service.Db.Conn.Exec(`UPDATE public.configuration SET value=$1 WHERE setting='TIMEZONE'`, tz)
+	if err != nil {
+		return werr.Wrap(err).WithData(tz)
+	}
+
 	return
 }