add teleporting

app/model/customer.go

@@ -82,6 +82,15 @@ type UserSession struct {
 	IsActive  bool         `json:"is_active"`
 }
 
+type UserLocale struct {
+	// User is the Target user if present, otherwise same as Original.
+	// User ought to be used in applications
+	User *Customer
+	// Original user is the one associated with auth token
+	OriginalUser *Customer
+	// Importantly, lang_id used in application is stored as OriginalUser.LangID
+}
+
 // ToSession converts User to UserSession
 func (u *Customer) ToSession() *UserSession {
 	return &UserSession{
@@ -98,6 +107,7 @@ func (u *Customer) ToSession() *UserSession {
 type LoginRequest struct {
 	Email    string `json:"email" form:"email"`
 	Password string `json:"password" form:"password"`
+	LangID   *uint  `json:"lang_id" form:"lang_id"`
 }
 
 // RegisterRequest represents the initial registration form data