Implement switching language (but doesn't persist)

server/service/miscService.go

@@ -1,7 +1,9 @@
 package service
 
 import (
+	"errors"
 	"hammond/db"
+	"hammond/models"
 )
 
 func CanInitializeSystem() (bool, error) {
@@ -14,15 +16,30 @@ func UpdateSettings(currency string, distanceUnit db.DistanceUnit) error {
 	setting.DistanceUnit = distanceUnit
 	return db.UpdateSettings(setting)
 }
-func UpdateUserSettings(userId, currency string, distanceUnit db.DistanceUnit, dateFormat string) error {
+func UpdateUserSettings(userId, currency string, distanceUnit db.DistanceUnit, dateFormat string, language string) error {
 	user, err := db.GetUserById(userId)
 	if err != nil {
 		return err
 	}
 
+	// TODO: Pull into function
+	languageExists := false
+	languages := models.GetLanguageMastersList();
+	for _, lang := range languages {
+		if (language == lang.Shorthand){
+			languageExists = true
+		}
+	}
+
+	if (!languageExists) {
+		return errors.New("Language not in masters list")
+	}
+
+
 	user.Currency = currency
 	user.DistanceUnit = distanceUnit
 	user.DateFormat = dateFormat
+	user.Language = language
 	return db.UpdateUser(user)
 }